Class Selection
java.lang.Object
org.springframework.expression.spel.ast.SpelNodeImpl
org.springframework.expression.spel.ast.Selection
Represents selection over a map or collection.
For example, {1,2,3,4,5,6,7,8,9,10}.?[#isEven(#this)]
evaluates
to [2, 4, 6, 8, 10]
.
Basically a subset of the input data is returned based on the evaluation of the expression supplied as selection criteria.
- Since:
- 3.0
- Author:
- Andy Clement, Mark Fisher, Sam Brannen, Juergen Hoeller
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final int
All items (?[]
).static final int
The first item (^[]
).static final int
The last item ($[]
).Fields inherited from class org.springframework.expression.spel.ast.SpelNodeImpl
children, exitTypeDescriptor
Fields inherited from interface org.springframework.asm.Opcodes
AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_MANDATED, ACC_MODULE, ACC_NATIVE, ACC_OPEN, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_RECORD, ACC_STATIC, ACC_STATIC_PHASE, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_TRANSITIVE, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASM10_EXPERIMENTAL, ASM4, ASM5, ASM6, ASM7, ASM8, ASM9, ASTORE, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DMUL, DNEG, DOUBLE, DREM, DRETURN, DSTORE, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F_APPEND, F_CHOP, F_FULL, F_NEW, F_SAME, F_SAME1, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAT, FMUL, FNEG, FREM, FRETURN, FSTORE, FSUB, GETFIELD, GETSTATIC, GOTO, H_GETFIELD, H_GETSTATIC, H_INVOKEINTERFACE, H_INVOKESPECIAL, H_INVOKESTATIC, H_INVOKEVIRTUAL, H_NEWINVOKESPECIAL, H_PUTFIELD, H_PUTSTATIC, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, IMUL, INEG, INSTANCEOF, INTEGER, INVOKEDYNAMIC, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISUB, IUSHR, IXOR, JSR, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDIV, LLOAD, LMUL, LNEG, LONG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, NULL, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SOURCE_DEPRECATED, SOURCE_MASK, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, TOP, UNINITIALIZED_THIS, V_PREVIEW, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6, V1_7, V1_8, V10, V11, V12, V13, V14, V15, V16, V17, V18, V19, V20, V21, V22, V23, V9
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Constructor Summary
ConstructorsConstructorDescriptionSelection
(boolean nullSafe, int variant, int startPos, int endPos, SpelNodeImpl expression) -
Method Summary
Modifier and TypeMethodDescriptiongetValueInternal
(ExpressionState state) protected ValueRef
getValueRef
(ExpressionState state) final boolean
Does this node represent a null-safe selection operation?Return the string form of this AST node.Methods inherited from class org.springframework.expression.spel.ast.SpelNodeImpl
generateCode, generateCodeForArgument, generateCodeForArguments, getChild, getChildCount, getEndPosition, getExitDescriptor, getObjectClass, getStartPosition, getTypedValue, getValue, getValue, isCompilable, isWritable, nextChildIs, setValue, setValueInternal
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Field Details
-
ALL
public static final int ALLAll items (?[]
).- See Also:
-
FIRST
public static final int FIRSTThe first item (^[]
).- See Also:
-
LAST
public static final int LASTThe last item ($[]
).- See Also:
-
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Constructor Details
-
Selection
-
-
Method Details
-
isNullSafe
public final boolean isNullSafe()Does this node represent a null-safe selection operation?- Overrides:
isNullSafe
in classSpelNodeImpl
- Returns:
true
if this node is the target of a null-safe operation- Since:
- 6.1.6
-
getValueInternal
- Specified by:
getValueInternal
in classSpelNodeImpl
- Throws:
EvaluationException
-
getValueRef
- Overrides:
getValueRef
in classSpelNodeImpl
- Throws:
EvaluationException
-
toStringAST
Description copied from interface:SpelNode
Return the string form of this AST node.- Returns:
- the string form
-