org.springframework.asm

Class MethodWriter

java.lang.Object

org.springframework.asm.MethodVisitor

org.springframework.asm.MethodWriter

final class MethodWriter
extends MethodVisitor

A MethodVisitor that generates a corresponding 'method_info' structure, as defined in the Java Virtual Machine Specification (JVMS).

Author:

Eric Bruneton, Eugene Kuleshov

See Also:

JVMS 4.6

Field Summary

Fields

Modifier and Type	Field and Description
private int	accessFlags The access_flags field of the method_info JVMS structure.
private ByteVector	code The 'code' field of the Code attribute.
private int	compute Indicates what must be computed.
(package private) static int	COMPUTE_ALL_FRAMES Indicates that all the stack map frames must be computed.
(package private) static int	COMPUTE_INSERTED_FRAMES Indicates that the stack map frames of type F_INSERT must be computed.
(package private) static int	COMPUTE_MAX_STACK_AND_LOCAL Indicates that the maximum stack size and the maximum number of local variables must be computed, from scratch.
(package private) static int	COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES Indicates that the maximum stack size and the maximum number of local variables must be computed, from the existing stack map frames.
(package private) static int	COMPUTE_NOTHING Indicates that nothing must be computed.
private Label	currentBasicBlock The current basic block, i.e.
private int[]	currentFrame The current stack map frame.
private int	currentLocals The number of local variables in the last visited stack map frame.
private ByteVector	defaultValue The default_value field of the AnnotationDefault attribute, or null.
private java.lang.String	descriptor The descriptor of this method.
private int	descriptorIndex The descriptor_index field of the method_info JVMS structure.
private int[]	exceptionIndexTable The exception_index_table array of the Exceptions attribute, or null.
private Attribute	firstAttribute The first non standard attribute of this method.
private Label	firstBasicBlock The first basic block of the method.
private Attribute	firstCodeAttribute The first non standard attribute of the Code attribute.
private Handler	firstHandler The first element in the exception handler list (used to generate the exception_table of the Code attribute).
private boolean	hasAsmInstructions Whether the bytecode of this method contains ASM specific instructions.
private boolean	hasSubroutines Whether this method contains subroutines.
private int	invisibleAnnotableParameterCount The number of method parameters that can have runtime visible annotations, or 0.
private Label	lastBasicBlock The last basic block of the method (in bytecode offset order).
private int	lastBytecodeOffset The start offset of the last visited instruction.
private AnnotationWriter	lastCodeRuntimeInvisibleTypeAnnotation The last runtime invisible type annotation of the Code attribute.
private AnnotationWriter	lastCodeRuntimeVisibleTypeAnnotation The last runtime visible type annotation of the Code attribute.
private Handler	lastHandler The last element in the exception handler list (used to generate the exception_table of the Code attribute).
private AnnotationWriter	lastRuntimeInvisibleAnnotation The last runtime invisible annotation of this method.
private AnnotationWriter[]	lastRuntimeInvisibleParameterAnnotations The runtime invisible parameter annotations of this method.
private AnnotationWriter	lastRuntimeInvisibleTypeAnnotation The last runtime invisible type annotation of this method.
private AnnotationWriter	lastRuntimeVisibleAnnotation The last runtime visible annotation of this method.
private AnnotationWriter[]	lastRuntimeVisibleParameterAnnotations The runtime visible parameter annotations of this method.
private AnnotationWriter	lastRuntimeVisibleTypeAnnotation The last runtime visible type annotation of this method.
private ByteVector	lineNumberTable The line_number_table array of the LineNumberTable code attribute, or null.
private int	lineNumberTableLength The line_number_table_length field of the LineNumberTable code attribute.
private ByteVector	localVariableTable The local_variable_table array of the LocalVariableTable code attribute, or null.
private int	localVariableTableLength The local_variable_table_length field of the LocalVariableTable code attribute.
private ByteVector	localVariableTypeTable The local_variable_type_table array of the LocalVariableTypeTable code attribute, or null.
private int	localVariableTypeTableLength The local_variable_type_table_length field of the LocalVariableTypeTable code attribute.
private int	maxLocals The max_locals field of the Code attribute.
private int	maxRelativeStackSize The maximum relative stack size after the last visited instruction.
private int	maxStack The max_stack field of the Code attribute.
private static int	NA Indicates that STACK_SIZE_DELTA is not applicable (not constant or never used).
private java.lang.String	name The name of this method.
private int	nameIndex The name_index field of the method_info JVMS structure.
private int	numberOfExceptions The number_of_exceptions field of the Exceptions attribute.
private ByteVector	parameters The 'parameters' array of the MethodParameters attribute, or null.
private int	parametersCount The parameters_count field of the MethodParameters attribute.
private int[]	previousFrame The last frame that was written in stackMapTableEntries.
private int	previousFrameOffset The bytecode offset of the last frame that was written in stackMapTableEntries.
private int	relativeStackSize The relative stack size after the last visited instruction.
private int	signatureIndex The signature_index field of the Signature attribute.
private int	sourceLength The length in bytes in SymbolTable.getSource() which must be copied to get the method_info for this method (excluding its first 6 bytes for access_flags, name_index and descriptor_index).
private int	sourceOffset The offset in bytes in SymbolTable.getSource() from which the method_info for this method (excluding its first 6 bytes) must be copied, or 0.
private static int[]	STACK_SIZE_DELTA The stack size variation corresponding to each JVM opcode.
private ByteVector	stackMapTableEntries The 'entries' array of the StackMapTable code attribute.
private int	stackMapTableNumberOfEntries The number_of_entries field of the StackMapTable code attribute.
private SymbolTable	symbolTable Where the constants used in this MethodWriter must be stored.
private int	visibleAnnotableParameterCount The number of method parameters that can have runtime visible annotations, or 0.

Fields inherited from class org.springframework.asm.MethodVisitor

api, mv

Constructor Summary

Constructors

Constructor and Description
MethodWriter(SymbolTable symbolTable, int access, java.lang.String name, java.lang.String descriptor, java.lang.String signature, java.lang.String[] exceptions, int compute) Constructs a new MethodWriter.

Method Summary

Modifier and Type	Method and Description
private void	addSuccessorToCurrentBasicBlock(int info, Label successor) Adds a successor to currentBasicBlock in the control flow graph.
(package private) boolean	canCopyMethodAttributes(ClassReader source, boolean hasSyntheticAttribute, boolean hasDeprecatedAttribute, int descriptorIndex, int signatureIndex, int exceptionsOffset) Returns whether the attributes of this method can be copied from the attributes of the given method (assuming there is no method visitor between the given ClassReader and this MethodWriter).
(package private) void	collectAttributePrototypes(Attribute.Set attributePrototypes) Collects the attributes of this method into the given set of attribute prototypes.
private void	computeAllFrames() Computes all the stack map frames of the method, from scratch.
private void	computeMaxStackAndLocal() Computes the maximum stack size of the method.
(package private) int	computeMethodInfoSize() Returns the size of the method_info JVMS structure generated by this MethodWriter.
private void	endCurrentBasicBlockWithNoSuccessor() Ends the current basic block.
(package private) boolean	hasAsmInstructions()
(package private) boolean	hasFrames()
private void	putAbstractTypes(int start, int end) Puts some abstract types of currentFrame in stackMapTableEntries , using the JVMS verification_type_info format used in StackMapTable attributes.
private void	putFrame() Compresses and writes currentFrame in a new StackMapTable entry.
private void	putFrameType(java.lang.Object type) Puts the given public API frame element type in stackMapTableEntries , using the JVMS verification_type_info format used in StackMapTable attributes.
(package private) void	putMethodInfo(ByteVector output) Puts the content of the method_info JVMS structure generated by this MethodWriter into the given ByteVector.
(package private) void	setMethodAttributesSource(int methodInfoOffset, int methodInfoLength) Sets the source from which the attributes of this method will be copied.
(package private) void	visitAbstractType(int frameIndex, int abstractType) Sets an abstract type in currentFrame.
void	visitAnnotableParameterCount(int parameterCount, boolean visible) Visits the number of method parameters that can have annotations.
AnnotationVisitor	visitAnnotation(java.lang.String descriptor, boolean visible) Visits an annotation of this method.
AnnotationVisitor	visitAnnotationDefault() Visits the default value of this annotation interface method.
void	visitAttribute(Attribute attribute) Visits a non standard attribute of this method.
void	visitCode() Starts the visit of the method's code, if any (i.e.
void	visitEnd() Visits the end of the method.
void	visitFieldInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String descriptor) Visits a field instruction.
void	visitFrame(int type, int numLocal, java.lang.Object[] local, int numStack, java.lang.Object[] stack) Visits the current state of the local variables and operand stack elements.
(package private) void	visitFrameEnd() Ends the visit of currentFrame by writing it in the StackMapTable entries and by updating the StackMapTable number_of_entries (except if the current frame is the first one, which is implicit in StackMapTable).
(package private) int	visitFrameStart(int offset, int numLocal, int numStack) Starts the visit of a new stack map frame, stored in currentFrame.
void	visitIincInsn(int var, int increment) Visits an IINC instruction.
void	visitInsn(int opcode) Visits a zero operand instruction.
AnnotationVisitor	visitInsnAnnotation(int typeRef, TypePath typePath, java.lang.String descriptor, boolean visible) Visits an annotation on an instruction.
void	visitIntInsn(int opcode, int operand) Visits an instruction with a single int operand.
void	visitInvokeDynamicInsn(java.lang.String name, java.lang.String descriptor, Handle bootstrapMethodHandle, java.lang.Object... bootstrapMethodArguments) Visits an invokedynamic instruction.
void	visitJumpInsn(int opcode, Label label) Visits a jump instruction.
void	visitLabel(Label label) Visits a label.
void	visitLdcInsn(java.lang.Object value) Visits a LDC instruction.
void	visitLineNumber(int line, Label start) Visits a line number declaration.
void	visitLocalVariable(java.lang.String name, java.lang.String descriptor, java.lang.String signature, Label start, Label end, int index) Visits a local variable declaration.
AnnotationVisitor	visitLocalVariableAnnotation(int typeRef, TypePath typePath, Label[] start, Label[] end, int[] index, java.lang.String descriptor, boolean visible) Visits an annotation on a local variable type.
void	visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels) Visits a LOOKUPSWITCH instruction.
void	visitMaxs(int maxStack, int maxLocals) Visits the maximum stack size and the maximum number of local variables of the method.
void	visitMethodInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String descriptor, boolean isInterface) Visits a method instruction.
void	visitMultiANewArrayInsn(java.lang.String descriptor, int numDimensions) Visits a MULTIANEWARRAY instruction.
void	visitParameter(java.lang.String name, int access) Visits a parameter of this method.
AnnotationVisitor	visitParameterAnnotation(int parameter, java.lang.String annotationDescriptor, boolean visible) Visits an annotation of a parameter this method.
private void	visitSwitchInsn(Label dflt, Label[] labels)
void	visitTableSwitchInsn(int min, int max, Label dflt, Label... labels) Visits a TABLESWITCH instruction.
AnnotationVisitor	visitTryCatchAnnotation(int typeRef, TypePath typePath, java.lang.String descriptor, boolean visible) Visits an annotation on an exception handler type.
void	visitTryCatchBlock(Label start, Label end, Label handler, java.lang.String type) Visits a try catch block.
AnnotationVisitor	visitTypeAnnotation(int typeRef, TypePath typePath, java.lang.String descriptor, boolean visible) Visits an annotation on a type in the method signature.
void	visitTypeInsn(int opcode, java.lang.String type) Visits a type instruction.
void	visitVarInsn(int opcode, int var) Visits a local variable instruction.

Methods inherited from class org.springframework.asm.MethodVisitor

visitMethodInsn

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

COMPUTE_NOTHING

static final int COMPUTE_NOTHING

Indicates that nothing must be computed.

See Also:

Constant Field Values

COMPUTE_MAX_STACK_AND_LOCAL

static final int COMPUTE_MAX_STACK_AND_LOCAL

Indicates that the maximum stack size and the maximum number of local variables must be computed, from scratch.

See Also:

Constant Field Values

COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES

static final int COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES

Indicates that the maximum stack size and the maximum number of local variables must be computed, from the existing stack map frames. This can be done more efficiently than with the control flow graph algorithm used for COMPUTE_MAX_STACK_AND_LOCAL, by using a linear scan of the bytecode instructions.

See Also:

Constant Field Values

COMPUTE_INSERTED_FRAMES

static final int COMPUTE_INSERTED_FRAMES

Indicates that the stack map frames of type F_INSERT must be computed. The other frames are not computed. They should all be of type F_NEW and should be sufficient to compute the content of the F_INSERT frames, together with the bytecode instructions between a F_NEW and a F_INSERT frame - and without any knowledge of the type hierarchy (by definition of F_INSERT).

See Also:

Constant Field Values

COMPUTE_ALL_FRAMES

static final int COMPUTE_ALL_FRAMES

Indicates that all the stack map frames must be computed. In this case the maximum stack size and the maximum number of local variables is also computed.

See Also:

Constant Field Values

NA

private static final int NA

Indicates that STACK_SIZE_DELTA is not applicable (not constant or never used).

See Also:

Constant Field Values

STACK_SIZE_DELTA

private static final int[] STACK_SIZE_DELTA

The stack size variation corresponding to each JVM opcode. The stack size variation for opcode 'o' is given by the array element at index 'o'.

See Also:

JVMS 6

symbolTable

private final SymbolTable symbolTable

Where the constants used in this MethodWriter must be stored.

accessFlags

private final int accessFlags

The access_flags field of the method_info JVMS structure. This field can contain ASM specific access flags, such as Opcodes.ACC_DEPRECATED, which are removed when generating the ClassFile structure.

nameIndex

private final int nameIndex

The name_index field of the method_info JVMS structure.

name

private final java.lang.String name

The name of this method.

descriptorIndex

private final int descriptorIndex

The descriptor_index field of the method_info JVMS structure.

descriptor

private final java.lang.String descriptor

The descriptor of this method.

maxStack

private int maxStack

The max_stack field of the Code attribute.

maxLocals

private int maxLocals

The max_locals field of the Code attribute.

code

private final ByteVector code

The 'code' field of the Code attribute.

firstHandler

private Handler firstHandler

The first element in the exception handler list (used to generate the exception_table of the Code attribute). The next ones can be accessed with the Handler.nextHandler field. May be null.

lastHandler

private Handler lastHandler

The last element in the exception handler list (used to generate the exception_table of the Code attribute). The next ones can be accessed with the Handler.nextHandler field. May be null.

lineNumberTableLength

private int lineNumberTableLength

The line_number_table_length field of the LineNumberTable code attribute.

lineNumberTable

private ByteVector lineNumberTable

The line_number_table array of the LineNumberTable code attribute, or null.

localVariableTableLength

private int localVariableTableLength

The local_variable_table_length field of the LocalVariableTable code attribute.

localVariableTable

private ByteVector localVariableTable

The local_variable_table array of the LocalVariableTable code attribute, or null.

localVariableTypeTableLength

private int localVariableTypeTableLength

The local_variable_type_table_length field of the LocalVariableTypeTable code attribute.

localVariableTypeTable

private ByteVector localVariableTypeTable

The local_variable_type_table array of the LocalVariableTypeTable code attribute, or null.

stackMapTableNumberOfEntries

private int stackMapTableNumberOfEntries

The number_of_entries field of the StackMapTable code attribute.

stackMapTableEntries

private ByteVector stackMapTableEntries

The 'entries' array of the StackMapTable code attribute.

lastCodeRuntimeVisibleTypeAnnotation

private AnnotationWriter lastCodeRuntimeVisibleTypeAnnotation

The last runtime visible type annotation of the Code attribute. The previous ones can be accessed with the AnnotationWriter.previousAnnotation field. May be null.

lastCodeRuntimeInvisibleTypeAnnotation

private AnnotationWriter lastCodeRuntimeInvisibleTypeAnnotation

The last runtime invisible type annotation of the Code attribute. The previous ones can be accessed with the AnnotationWriter.previousAnnotation field. May be null.

firstCodeAttribute

private Attribute firstCodeAttribute

The first non standard attribute of the Code attribute. The next ones can be accessed with the Attribute.nextAttribute field. May be null.

WARNING: this list stores the attributes in the reverse order of their visit. firstAttribute is actually the last attribute visited in visitAttribute(org.springframework.asm.Attribute). The putMethodInfo(org.springframework.asm.ByteVector) method writes the attributes in the order defined by this list, i.e. in the reverse order specified by the user.

numberOfExceptions

private final int numberOfExceptions

The number_of_exceptions field of the Exceptions attribute.

exceptionIndexTable

private final int[] exceptionIndexTable

The exception_index_table array of the Exceptions attribute, or null.

signatureIndex

private final int signatureIndex

The signature_index field of the Signature attribute.

lastRuntimeVisibleAnnotation

private AnnotationWriter lastRuntimeVisibleAnnotation

The last runtime visible annotation of this method. The previous ones can be accessed with the AnnotationWriter.previousAnnotation field. May be null.

lastRuntimeInvisibleAnnotation

private AnnotationWriter lastRuntimeInvisibleAnnotation

The last runtime invisible annotation of this method. The previous ones can be accessed with the AnnotationWriter.previousAnnotation field. May be null.

visibleAnnotableParameterCount

private int visibleAnnotableParameterCount

The number of method parameters that can have runtime visible annotations, or 0.

lastRuntimeVisibleParameterAnnotations

private AnnotationWriter[] lastRuntimeVisibleParameterAnnotations

The runtime visible parameter annotations of this method. Each array element contains the last annotation of a parameter (which can be null - the previous ones can be accessed with the AnnotationWriter.previousAnnotation field). May be null.

invisibleAnnotableParameterCount

private int invisibleAnnotableParameterCount

The number of method parameters that can have runtime visible annotations, or 0.

lastRuntimeInvisibleParameterAnnotations

private AnnotationWriter[] lastRuntimeInvisibleParameterAnnotations

The runtime invisible parameter annotations of this method. Each array element contains the last annotation of a parameter (which can be null - the previous ones can be accessed with the AnnotationWriter.previousAnnotation field). May be null.

lastRuntimeVisibleTypeAnnotation

private AnnotationWriter lastRuntimeVisibleTypeAnnotation

The last runtime visible type annotation of this method. The previous ones can be accessed with the AnnotationWriter.previousAnnotation field. May be null.

lastRuntimeInvisibleTypeAnnotation

private AnnotationWriter lastRuntimeInvisibleTypeAnnotation

The last runtime invisible type annotation of this method. The previous ones can be accessed with the AnnotationWriter.previousAnnotation field. May be null.

defaultValue

private ByteVector defaultValue

The default_value field of the AnnotationDefault attribute, or null.

parametersCount

private int parametersCount

The parameters_count field of the MethodParameters attribute.

parameters

private ByteVector parameters

The 'parameters' array of the MethodParameters attribute, or null.

firstAttribute

private Attribute firstAttribute

The first non standard attribute of this method. The next ones can be accessed with the Attribute.nextAttribute field. May be null.

WARNING: this list stores the attributes in the reverse order of their visit. firstAttribute is actually the last attribute visited in visitAttribute(org.springframework.asm.Attribute). The putMethodInfo(org.springframework.asm.ByteVector) method writes the attributes in the order defined by this list, i.e. in the reverse order specified by the user.

compute

private final int compute

Indicates what must be computed. Must be one of COMPUTE_ALL_FRAMES, COMPUTE_INSERTED_FRAMES, COMPUTE_MAX_STACK_AND_LOCAL or COMPUTE_NOTHING.

firstBasicBlock

private Label firstBasicBlock

The first basic block of the method. The next ones (in bytecode offset order) can be accessed with the Label.nextBasicBlock field.

lastBasicBlock

private Label lastBasicBlock

The last basic block of the method (in bytecode offset order). This field is updated each time a basic block is encountered, and is used to append it at the end of the basic block list.

currentBasicBlock

private Label currentBasicBlock

The current basic block, i.e. the basic block of the last visited instruction. When compute is equal to COMPUTE_MAX_STACK_AND_LOCAL or COMPUTE_ALL_FRAMES, this field is null for unreachable code. When compute is equal to COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES or COMPUTE_INSERTED_FRAMES, this field stays unchanged throughout the whole method (i.e. the whole code is seen as a single basic block; indeed, the existing frames are sufficient by hypothesis to compute any intermediate frame - and the maximum stack size as well - without using any control flow graph).

relativeStackSize

private int relativeStackSize

The relative stack size after the last visited instruction. This size is relative to the beginning of currentBasicBlock, i.e. the true stack size after the last visited instruction is equal to the Label.inputStackSize of the current basic block plus relativeStackSize. When compute is equal to COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES, currentBasicBlock is always the start of the method, so this relative size is also equal to the absolute stack size after the last visited instruction.

maxRelativeStackSize

private int maxRelativeStackSize

The maximum relative stack size after the last visited instruction. This size is relative to the beginning of currentBasicBlock, i.e. the true maximum stack size after the last visited instruction is equal to the Label.inputStackSize of the current basic block plus maxRelativeStackSize.When compute is equal to COMPUTE_MAX_STACK_AND_LOCAL_FROM_FRAMES, currentBasicBlock is always the start of the method, so this relative size is also equal to the absolute maximum stack size after the last visited instruction.

currentLocals

private int currentLocals

The number of local variables in the last visited stack map frame.

previousFrameOffset

private int previousFrameOffset

The bytecode offset of the last frame that was written in stackMapTableEntries.

previousFrame

private int[] previousFrame

The last frame that was written in stackMapTableEntries. This field has the same format as currentFrame.

currentFrame

private int[] currentFrame

The current stack map frame. The first element contains the bytecode offset of the instruction to which the frame corresponds, the second element is the number of locals and the third one is the number of stack elements. The local variables start at index 3 and are followed by the operand stack elements. In summary frame[0] = offset, frame[1] = numLocal, frame[2] = numStack. Local variables and operand stack entries contain abstract types, as defined in Frame, but restricted to Frame.CONSTANT_KIND, Frame.REFERENCE_KIND or Frame.UNINITIALIZED_KIND abstract types. Long and double types use only one array entry.

hasSubroutines

private boolean hasSubroutines

Whether this method contains subroutines.

hasAsmInstructions

private boolean hasAsmInstructions

Whether the bytecode of this method contains ASM specific instructions.

lastBytecodeOffset

private int lastBytecodeOffset

The start offset of the last visited instruction. Used to set the offset field of type annotations of type 'offset_target' (see JVMS 4.7.20.1).

sourceOffset

private int sourceOffset

The offset in bytes in SymbolTable.getSource() from which the method_info for this method (excluding its first 6 bytes) must be copied, or 0.

sourceLength

private int sourceLength

The length in bytes in SymbolTable.getSource() which must be copied to get the method_info for this method (excluding its first 6 bytes for access_flags, name_index and descriptor_index).

Constructor Detail

MethodWriter

MethodWriter(SymbolTable symbolTable,
             int access,
             java.lang.String name,
             java.lang.String descriptor,
             java.lang.String signature,
             java.lang.String[] exceptions,
             int compute)

Constructs a new MethodWriter.

Parameters:

symbolTable - where the constants used in this AnnotationWriter must be stored.

access - the method's access flags (see Opcodes).

name - the method's name.

descriptor - the method's descriptor (see Type).

signature - the method's signature. May be null.

exceptions - the internal names of the method's exceptions. May be null.

compute - indicates what must be computed (see #compute).

Method Detail

hasFrames

boolean hasFrames()

hasAsmInstructions

boolean hasAsmInstructions()

visitParameter

public void visitParameter(java.lang.String name,
                           int access)

Description copied from class: MethodVisitor

Visits a parameter of this method.

Overrides:

visitParameter in class MethodVisitor

Parameters:

name - parameter name or null if none is provided.

access - the parameter's access flags, only ACC_FINAL, ACC_SYNTHETIC or/and ACC_MANDATED are allowed (see Opcodes).

visitAnnotationDefault

public AnnotationVisitor visitAnnotationDefault()

Description copied from class: MethodVisitor

Visits the default value of this annotation interface method.

Overrides:

visitAnnotationDefault in class MethodVisitor

Returns:

a visitor to the visit the actual default value of this annotation interface method, or null if this visitor is not interested in visiting this default value. The 'name' parameters passed to the methods of this annotation visitor are ignored. Moreover, exacly one visit method must be called on this annotation visitor, followed by visitEnd.

visitAnnotation

public AnnotationVisitor visitAnnotation(java.lang.String descriptor,
                                         boolean visible)

Description copied from class: MethodVisitor

Visits an annotation of this method.

Overrides:

visitAnnotation in class MethodVisitor

Parameters:

descriptor - the class descriptor of the annotation class.

visible - true if the annotation is visible at runtime.

Returns:

a visitor to visit the annotation values, or null if this visitor is not interested in visiting this annotation.

visitTypeAnnotation

public AnnotationVisitor visitTypeAnnotation(int typeRef,
                                             TypePath typePath,
                                             java.lang.String descriptor,
                                             boolean visible)

Description copied from class: MethodVisitor

Visits an annotation on a type in the method signature.

Overrides:

visitTypeAnnotation in class MethodVisitor

Parameters:

typeRef - a reference to the annotated type. The sort of this type reference must be TypeReference.METHOD_TYPE_PARAMETER, TypeReference.METHOD_TYPE_PARAMETER_BOUND, TypeReference.METHOD_RETURN, TypeReference.METHOD_RECEIVER, TypeReference.METHOD_FORMAL_PARAMETER or TypeReference.THROWS. See TypeReference.

typePath - the path to the annotated type argument, wildcard bound, array element type, or static inner type within 'typeRef'. May be null if the annotation targets 'typeRef' as a whole.

descriptor - the class descriptor of the annotation class.

visible - true if the annotation is visible at runtime.

Returns:

a visitor to visit the annotation values, or null if this visitor is not interested in visiting this annotation.

visitAnnotableParameterCount

public void visitAnnotableParameterCount(int parameterCount,
                                         boolean visible)

Description copied from class: MethodVisitor

Visits the number of method parameters that can have annotations. By default (i.e. when this method is not called), all the method parameters defined by the method descriptor can have annotations.

Overrides:

visitAnnotableParameterCount in class MethodVisitor

Parameters:

parameterCount - the number of method parameters than can have annotations. This number must be less or equal than the number of parameter types in the method descriptor. It can be strictly less when a method has synthetic parameters and when these parameters are ignored when computing parameter indices for the purpose of parameter annotations (see https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.18).

visible - true to define the number of method parameters that can have annotations visible at runtime, false to define the number of method parameters that can have annotations invisible at runtime.

visitParameterAnnotation

public AnnotationVisitor visitParameterAnnotation(int parameter,
                                                  java.lang.String annotationDescriptor,
                                                  boolean visible)

Description copied from class: MethodVisitor

Visits an annotation of a parameter this method.

Overrides:

visitParameterAnnotation in class MethodVisitor

Parameters:

parameter - the parameter index. This index must be strictly smaller than the number of parameters in the method descriptor, and strictly smaller than the parameter count specified in MethodVisitor.visitAnnotableParameterCount(int, boolean). Important note: a parameter index i is not required to correspond to the i'th parameter descriptor in the method descriptor, in particular in case of synthetic parameters (see https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.18).

annotationDescriptor - the class descriptor of the annotation class.

visible - true if the annotation is visible at runtime.

Returns:

a visitor to visit the annotation values, or null if this visitor is not interested in visiting this annotation.

visitAttribute

public void visitAttribute(Attribute attribute)

Description copied from class: MethodVisitor

Visits a non standard attribute of this method.

Overrides:

visitAttribute in class MethodVisitor

Parameters:

attribute - an attribute.

visitCode

public void visitCode()

Description copied from class: MethodVisitor

Starts the visit of the method's code, if any (i.e. non abstract method).

Overrides:

visitCode in class MethodVisitor

visitFrame

public void visitFrame(int type,
                       int numLocal,
                       java.lang.Object[] local,
                       int numStack,
                       java.lang.Object[] stack)

Description copied from class: MethodVisitor

Visits the current state of the local variables and operand stack elements. This method must(*) be called just before any instruction i that follows an unconditional branch instruction such as GOTO or THROW, that is the target of a jump instruction, or that starts an exception handler block. The visited types must describe the values of the local variables and of the operand stack elements just before i is executed.

(*) this is mandatory only for classes whose version is greater than or equal to Opcodes.V1_6.

The frames of a method must be given either in expanded form, or in compressed form (all frames must use the same format, i.e. you must not mix expanded and compressed frames within a single method):

• In expanded form, all frames must have the F_NEW type.
• In compressed form, frames are basically "deltas" from the state of the previous frame:
  • Opcodes.F_SAME representing frame with exactly the same locals as the previous frame and with the empty stack.
  • Opcodes.F_SAME1 representing frame with exactly the same locals as the previous frame and with single value on the stack ( numStack is 1 and stack[0] contains value for the type of the stack item).
  • Opcodes.F_APPEND representing frame with current locals are the same as the locals in the previous frame, except that additional locals are defined ( numLocal is 1, 2 or 3 and local elements contains values representing added types).
  • Opcodes.F_CHOP representing frame with current locals are the same as the locals in the previous frame, except that the last 1-3 locals are absent and with the empty stack (numLocal is 1, 2 or 3).
  • Opcodes.F_FULL representing complete frame data.

In both cases the first frame, corresponding to the method's parameters and access flags, is implicit and must not be visited. Also, it is illegal to visit two or more frames for the same code location (i.e., at least one instruction must be visited between two calls to visitFrame).

Overrides:

visitFrame in class MethodVisitor

Parameters:

type - the type of this stack map frame. Must be Opcodes.F_NEW for expanded frames, or Opcodes.F_FULL, Opcodes.F_APPEND, Opcodes.F_CHOP, Opcodes.F_SAME or Opcodes.F_APPEND, Opcodes.F_SAME1 for compressed frames.

numLocal - the number of local variables in the visited frame.

local - the local variable types in this frame. This array must not be modified. Primitive types are represented by Opcodes.TOP, Opcodes.INTEGER, Opcodes.FLOAT, Opcodes.LONG, Opcodes.DOUBLE, Opcodes.NULL or Opcodes.UNINITIALIZED_THIS (long and double are represented by a single element). Reference types are represented by String objects (representing internal names), and uninitialized types by Label objects (this label designates the NEW instruction that created this uninitialized value).

numStack - the number of operand stack elements in the visited frame.

stack - the operand stack types in this frame. This array must not be modified. Its content has the same format as the "local" array.

visitInsn

public void visitInsn(int opcode)

Description copied from class: MethodVisitor

Visits a zero operand instruction.

Overrides:

visitInsn in class MethodVisitor

Parameters:

opcode - the opcode of the instruction to be visited. This opcode is either NOP, ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE, POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP, IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG, FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C, I2S, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IRETURN, LRETURN, FRETURN, DRETURN, ARETURN, RETURN, ARRAYLENGTH, ATHROW, MONITORENTER, or MONITOREXIT.

visitIntInsn

public void visitIntInsn(int opcode,
                         int operand)

Description copied from class: MethodVisitor

Visits an instruction with a single int operand.

Overrides:

visitIntInsn in class MethodVisitor

Parameters:

opcode - the opcode of the instruction to be visited. This opcode is either BIPUSH, SIPUSH or NEWARRAY.

operand - the operand of the instruction to be visited.
When opcode is BIPUSH, operand value should be between Byte.MIN_VALUE and Byte.MAX_VALUE.
When opcode is SIPUSH, operand value should be between Short.MIN_VALUE and Short.MAX_VALUE.
When opcode is NEWARRAY, operand value should be one of Opcodes.T_BOOLEAN, Opcodes.T_CHAR, Opcodes.T_FLOAT, Opcodes.T_DOUBLE, Opcodes.T_BYTE, Opcodes.T_SHORT, Opcodes.T_INT or Opcodes.T_LONG.

visitVarInsn

public void visitVarInsn(int opcode,
                         int var)

Description copied from class: MethodVisitor

Visits a local variable instruction. A local variable instruction is an instruction that loads or stores the value of a local variable.

Overrides:

visitVarInsn in class MethodVisitor

Parameters:

opcode - the opcode of the local variable instruction to be visited. This opcode is either ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.

var - the operand of the instruction to be visited. This operand is the index of a local variable.

visitTypeInsn

public void visitTypeInsn(int opcode,
                          java.lang.String type)

Description copied from class: MethodVisitor

Visits a type instruction. A type instruction is an instruction that takes the internal name of a class as parameter.

Overrides:

visitTypeInsn in class MethodVisitor

Parameters:

opcode - the opcode of the type instruction to be visited. This opcode is either NEW, ANEWARRAY, CHECKCAST or INSTANCEOF.

type - the operand of the instruction to be visited. This operand must be the internal name of an object or array class (see Type.getInternalName()).

visitFieldInsn

public void visitFieldInsn(int opcode,
                           java.lang.String owner,
                           java.lang.String name,
                           java.lang.String descriptor)

Description copied from class: MethodVisitor

Visits a field instruction. A field instruction is an instruction that loads or stores the value of a field of an object.

Overrides:

visitFieldInsn in class MethodVisitor

Parameters:

opcode - the opcode of the type instruction to be visited. This opcode is either GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.

owner - the internal name of the field's owner class (see Type.getInternalName()).

name - the field's name.

descriptor - the field's descriptor (see Type).

visitMethodInsn

public void visitMethodInsn(int opcode,
                            java.lang.String owner,
                            java.lang.String name,
                            java.lang.String descriptor,
                            boolean isInterface)

Description copied from class: MethodVisitor

Visits a method instruction. A method instruction is an instruction that invokes a method.

Overrides:

visitMethodInsn in class MethodVisitor

Parameters:

opcode - the opcode of the type instruction to be visited. This opcode is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE.

owner - the internal name of the method's owner class (see Type.getInternalName()).

name - the method's name.

descriptor - the method's descriptor (see Type).

isInterface - if the method's owner class is an interface.

visitInvokeDynamicInsn

public void visitInvokeDynamicInsn(java.lang.String name,
                                   java.lang.String descriptor,
                                   Handle bootstrapMethodHandle,
                                   java.lang.Object... bootstrapMethodArguments)

Description copied from class: MethodVisitor

Visits an invokedynamic instruction.

Overrides:

visitInvokeDynamicInsn in class MethodVisitor

Parameters:

name - the method's name.

descriptor - the method's descriptor (see Type).

bootstrapMethodHandle - the bootstrap method.

bootstrapMethodArguments - the bootstrap method constant arguments. Each argument must be an Integer, Float, Long, Double, String, Type, Handle or ConstantDynamic value. This method is allowed to modify the content of the array so a caller should expect that this array may change.

visitJumpInsn

public void visitJumpInsn(int opcode,
                          Label label)

Description copied from class: MethodVisitor

Visits a jump instruction. A jump instruction is an instruction that may jump to another instruction.

Overrides:

visitJumpInsn in class MethodVisitor

Parameters:

opcode - the opcode of the type instruction to be visited. This opcode is either IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL.

label - the operand of the instruction to be visited. This operand is a label that designates the instruction to which the jump instruction may jump.

visitLabel

public void visitLabel(Label label)

Description copied from class: MethodVisitor

Visits a label. A label designates the instruction that will be visited just after it.

Overrides:

visitLabel in class MethodVisitor

Parameters:

label - a Label object.

visitLdcInsn

public void visitLdcInsn(java.lang.Object value)

Description copied from class: MethodVisitor

Visits a LDC instruction. Note that new constant types may be added in future versions of the Java Virtual Machine. To easily detect new constant types, implementations of this method should check for unexpected constant types, like this:

 if (cst instanceof Integer) {
     // ...
 } else if (cst instanceof Float) {
     // ...
 } else if (cst instanceof Long) {
     // ...
 } else if (cst instanceof Double) {
     // ...
 } else if (cst instanceof String) {
     // ...
 } else if (cst instanceof Type) {
     int sort = ((Type) cst).getSort();
     if (sort == Type.OBJECT) {
         // ...
     } else if (sort == Type.ARRAY) {
         // ...
     } else if (sort == Type.METHOD) {
         // ...
     } else {
         // throw an exception
     }
 } else if (cst instanceof Handle) {
     // ...
 } else if (cst instanceof ConstantDynamic) {
     // ...
 } else {
     // throw an exception
 }
 

Overrides:

visitLdcInsn in class MethodVisitor

Parameters:

value - the constant to be loaded on the stack. This parameter must be a non null Integer, a Float, a Long, a Double, a String, a Type of OBJECT or ARRAY sort for .class constants, for classes whose version is 49, a Type of METHOD sort for MethodType, a Handle for MethodHandle constants, for classes whose version is 51 or a ConstantDynamic for a constant dynamic for classes whose version is 55.

visitIincInsn

public void visitIincInsn(int var,
                          int increment)

Description copied from class: MethodVisitor

Visits an IINC instruction.

Overrides:

visitIincInsn in class MethodVisitor

Parameters:

var - index of the local variable to be incremented.

increment - amount to increment the local variable by.

visitTableSwitchInsn

public void visitTableSwitchInsn(int min,
                                 int max,
                                 Label dflt,
                                 Label... labels)

Description copied from class: MethodVisitor

Visits a TABLESWITCH instruction.

Overrides:

visitTableSwitchInsn in class MethodVisitor

Parameters:

min - the minimum key value.

max - the maximum key value.

dflt - beginning of the default handler block.

labels - beginnings of the handler blocks. labels[i] is the beginning of the handler block for the min + i key.

visitLookupSwitchInsn

public void visitLookupSwitchInsn(Label dflt,
                                  int[] keys,
                                  Label[] labels)

Description copied from class: MethodVisitor

Visits a LOOKUPSWITCH instruction.

Overrides:

visitLookupSwitchInsn in class MethodVisitor

Parameters:

dflt - beginning of the default handler block.

keys - the values of the keys.

labels - beginnings of the handler blocks. labels[i] is the beginning of the handler block for the keys[i] key.

visitSwitchInsn

private void visitSwitchInsn(Label dflt,
                             Label[] labels)

visitMultiANewArrayInsn

public void visitMultiANewArrayInsn(java.lang.String descriptor,
                                    int numDimensions)

Description copied from class: MethodVisitor

Visits a MULTIANEWARRAY instruction.

Overrides:

visitMultiANewArrayInsn in class MethodVisitor

Parameters:

descriptor - an array type descriptor (see Type).

numDimensions - the number of dimensions of the array to allocate.

visitInsnAnnotation

public AnnotationVisitor visitInsnAnnotation(int typeRef,
                                             TypePath typePath,
                                             java.lang.String descriptor,
                                             boolean visible)

Description copied from class: MethodVisitor

Visits an annotation on an instruction. This method must be called just after the annotated instruction. It can be called several times for the same instruction.

Overrides:

visitInsnAnnotation in class MethodVisitor

Parameters:

typeRef - a reference to the annotated type. The sort of this type reference must be TypeReference.INSTANCEOF, TypeReference.NEW, TypeReference.CONSTRUCTOR_REFERENCE, TypeReference.METHOD_REFERENCE, TypeReference.CAST, TypeReference.CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT, TypeReference.METHOD_INVOCATION_TYPE_ARGUMENT, TypeReference.CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT, or TypeReference.METHOD_REFERENCE_TYPE_ARGUMENT. See TypeReference.

typePath - the path to the annotated type argument, wildcard bound, array element type, or static inner type within 'typeRef'. May be null if the annotation targets 'typeRef' as a whole.

descriptor - the class descriptor of the annotation class.

visible - true if the annotation is visible at runtime.

Returns:

a visitor to visit the annotation values, or null if this visitor is not interested in visiting this annotation.

visitTryCatchBlock

public void visitTryCatchBlock(Label start,
                               Label end,
                               Label handler,
                               java.lang.String type)

Description copied from class: MethodVisitor

Visits a try catch block.

Overrides:

visitTryCatchBlock in class MethodVisitor

Parameters:

start - the beginning of the exception handler's scope (inclusive).

end - the end of the exception handler's scope (exclusive).

handler - the beginning of the exception handler's code.

type - the internal name of the type of exceptions handled by the handler, or null to catch any exceptions (for "finally" blocks).

visitTryCatchAnnotation

public AnnotationVisitor visitTryCatchAnnotation(int typeRef,
                                                 TypePath typePath,
                                                 java.lang.String descriptor,
                                                 boolean visible)

Description copied from class: MethodVisitor

Visits an annotation on an exception handler type. This method must be called after the MethodVisitor.visitTryCatchBlock(org.springframework.asm.Label, org.springframework.asm.Label, org.springframework.asm.Label, java.lang.String) for the annotated exception handler. It can be called several times for the same exception handler.

Overrides:

visitTryCatchAnnotation in class MethodVisitor

Parameters:

typeRef - a reference to the annotated type. The sort of this type reference must be TypeReference.EXCEPTION_PARAMETER. See TypeReference.

typePath - the path to the annotated type argument, wildcard bound, array element type, or static inner type within 'typeRef'. May be null if the annotation targets 'typeRef' as a whole.

descriptor - the class descriptor of the annotation class.

visible - true if the annotation is visible at runtime.

Returns:

a visitor to visit the annotation values, or null if this visitor is not interested in visiting this annotation.

visitLocalVariable

public void visitLocalVariable(java.lang.String name,
                               java.lang.String descriptor,
                               java.lang.String signature,
                               Label start,
                               Label end,
                               int index)

Description copied from class: MethodVisitor

Visits a local variable declaration.

Overrides:

visitLocalVariable in class MethodVisitor

Parameters:

name - the name of a local variable.

descriptor - the type descriptor of this local variable.

signature - the type signature of this local variable. May be null if the local variable type does not use generic types.

start - the first instruction corresponding to the scope of this local variable (inclusive).

end - the last instruction corresponding to the scope of this local variable (exclusive).

index - the local variable's index.

visitLocalVariableAnnotation

public AnnotationVisitor visitLocalVariableAnnotation(int typeRef,
                                                      TypePath typePath,
                                                      Label[] start,
                                                      Label[] end,
                                                      int[] index,
                                                      java.lang.String descriptor,
                                                      boolean visible)

Description copied from class: MethodVisitor

Visits an annotation on a local variable type.

Overrides:

visitLocalVariableAnnotation in class MethodVisitor

Parameters:

typeRef - a reference to the annotated type. The sort of this type reference must be TypeReference.LOCAL_VARIABLE or TypeReference.RESOURCE_VARIABLE. See TypeReference.

typePath - the path to the annotated type argument, wildcard bound, array element type, or static inner type within 'typeRef'. May be null if the annotation targets 'typeRef' as a whole.

start - the fist instructions corresponding to the continuous ranges that make the scope of this local variable (inclusive).

end - the last instructions corresponding to the continuous ranges that make the scope of this local variable (exclusive). This array must have the same size as the 'start' array.

index - the local variable's index in each range. This array must have the same size as the 'start' array.

descriptor - the class descriptor of the annotation class.

visible - true if the annotation is visible at runtime.

Returns:

a visitor to visit the annotation values, or null if this visitor is not interested in visiting this annotation.

visitLineNumber

public void visitLineNumber(int line,
                            Label start)

Description copied from class: MethodVisitor

Visits a line number declaration.

Overrides:

visitLineNumber in class MethodVisitor

Parameters:

line - a line number. This number refers to the source file from which the class was compiled.

start - the first instruction corresponding to this line number.

visitMaxs

public void visitMaxs(int maxStack,
                      int maxLocals)

Description copied from class: MethodVisitor

Visits the maximum stack size and the maximum number of local variables of the method.

Overrides:

visitMaxs in class MethodVisitor

Parameters:

maxStack - maximum stack size of the method.

maxLocals - maximum number of local variables for the method.

computeAllFrames

private void computeAllFrames()

Computes all the stack map frames of the method, from scratch.

computeMaxStackAndLocal

private void computeMaxStackAndLocal()

Computes the maximum stack size of the method.

visitEnd

public void visitEnd()

Description copied from class: MethodVisitor

Visits the end of the method. This method, which is the last one to be called, is used to inform the visitor that all the annotations and attributes of the method have been visited.

Overrides:

visitEnd in class MethodVisitor

addSuccessorToCurrentBasicBlock

private void addSuccessorToCurrentBasicBlock(int info,
                                             Label successor)

Adds a successor to currentBasicBlock in the control flow graph.

Parameters:

info - information about the control flow edge to be added.

successor - the successor block to be added to the current basic block.

endCurrentBasicBlockWithNoSuccessor

private void endCurrentBasicBlockWithNoSuccessor()

Ends the current basic block. This method must be used in the case where the current basic block does not have any successor.

WARNING: this method must be called after the currently visited instruction has been put in code (if frames are computed, this method inserts a new Label to start a new basic block after the current instruction).

visitFrameStart

int visitFrameStart(int offset,
                    int numLocal,
                    int numStack)

Starts the visit of a new stack map frame, stored in currentFrame.

Parameters:

offset - the bytecode offset of the instruction to which the frame corresponds.

numLocal - the number of local variables in the frame.

numStack - the number of stack elements in the frame.

Returns:

the index of the next element to be written in this frame.

visitAbstractType

void visitAbstractType(int frameIndex,
                       int abstractType)

Sets an abstract type in currentFrame.

Parameters:

frameIndex - the index of the element to be set in currentFrame.

abstractType - an abstract type.

visitFrameEnd

void visitFrameEnd()

Ends the visit of currentFrame by writing it in the StackMapTable entries and by updating the StackMapTable number_of_entries (except if the current frame is the first one, which is implicit in StackMapTable). Then resets currentFrame to null.

putFrame

private void putFrame()

Compresses and writes currentFrame in a new StackMapTable entry.

putAbstractTypes

private void putAbstractTypes(int start,
                              int end)

Puts some abstract types of currentFrame in stackMapTableEntries , using the JVMS verification_type_info format used in StackMapTable attributes.

Parameters:

start - index of the first type in currentFrame to write.

end - index of last type in currentFrame to write (exclusive).

putFrameType

private void putFrameType(java.lang.Object type)

Puts the given public API frame element type in stackMapTableEntries , using the JVMS verification_type_info format used in StackMapTable attributes.

Parameters:

type - a frame element type described using the same format as in MethodVisitor.visitFrame(int, int, java.lang.Object[], int, java.lang.Object[]), i.e. either Opcodes.TOP, Opcodes.INTEGER, Opcodes.FLOAT, Opcodes.LONG, Opcodes.DOUBLE, Opcodes.NULL, or Opcodes.UNINITIALIZED_THIS, or the internal name of a class, or a Label designating a NEW instruction (for uninitialized types).

canCopyMethodAttributes

boolean canCopyMethodAttributes(ClassReader source,
                                boolean hasSyntheticAttribute,
                                boolean hasDeprecatedAttribute,
                                int descriptorIndex,
                                int signatureIndex,
                                int exceptionsOffset)

Returns whether the attributes of this method can be copied from the attributes of the given method (assuming there is no method visitor between the given ClassReader and this MethodWriter). This method should only be called just after this MethodWriter has been created, and before any content is visited. It returns true if the attributes corresponding to the constructor arguments (at most a Signature, an Exception, a Deprecated and a Synthetic attribute) are the same as the corresponding attributes in the given method.

Parameters:

source - the source ClassReader from which the attributes of this method might be copied.

hasSyntheticAttribute - whether the method_info JVMS structure from which the attributes of this method might be copied contains a Synthetic attribute.

hasDeprecatedAttribute - whether the method_info JVMS structure from which the attributes of this method might be copied contains a Deprecated attribute.

descriptorIndex - the descriptor_index field of the method_info JVMS structure from which the attributes of this method might be copied.

signatureIndex - the constant pool index contained in the Signature attribute of the method_info JVMS structure from which the attributes of this method might be copied, or 0.

exceptionsOffset - the offset in 'source.b' of the Exceptions attribute of the method_info JVMS structure from which the attributes of this method might be copied, or 0.

Returns:

whether the attributes of this method can be copied from the attributes of the method_info JVMS structure in 'source.b', between 'methodInfoOffset' and 'methodInfoOffset' + 'methodInfoLength'.

setMethodAttributesSource

void setMethodAttributesSource(int methodInfoOffset,
                               int methodInfoLength)

Sets the source from which the attributes of this method will be copied.

Parameters:

methodInfoOffset - the offset in 'symbolTable.getSource()' of the method_info JVMS structure from which the attributes of this method will be copied.

methodInfoLength - the length in 'symbolTable.getSource()' of the method_info JVMS structure from which the attributes of this method will be copied.

computeMethodInfoSize

int computeMethodInfoSize()

Returns the size of the method_info JVMS structure generated by this MethodWriter. Also add the names of the attributes of this method in the constant pool.

Returns:

the size in bytes of the method_info JVMS structure.

putMethodInfo

void putMethodInfo(ByteVector output)

Puts the content of the method_info JVMS structure generated by this MethodWriter into the given ByteVector.

Parameters:

output - where the method_info structure must be put.

collectAttributePrototypes

final void collectAttributePrototypes(Attribute.Set attributePrototypes)

Collects the attributes of this method into the given set of attribute prototypes.

Parameters:

attributePrototypes - a set of attribute prototypes.