org.springframework.expression.spel.ast

Class PropertyOrFieldReference

java.lang.Object

org.springframework.expression.spel.ast.SpelNodeImpl

org.springframework.expression.spel.ast.PropertyOrFieldReference

All Implemented Interfaces:

SpelNode

public class PropertyOrFieldReference
extends SpelNodeImpl

Represents a simple property or field reference.

Since:

3.0

Author:

Andy Clement, Juergen Hoeller, Clark Duplichien

Field Summary

Fields inherited from class org.springframework.expression.spel.ast.SpelNodeImpl

children, pos

Constructor Summary

Constructors

Constructor and Description
PropertyOrFieldReference(boolean nullSafe, String propertyOrFieldName, int pos)

Method Summary

Modifier and Type	Method and Description
String	getName()
TypedValue	getValueInternal(ExpressionState state)
ValueRef	getValueRef(ExpressionState state)
boolean	isNullSafe()
boolean	isWritable(ExpressionState state) Determine if this expression node will support a setValue() call.
boolean	isWritableProperty(String name, TypedValue contextObject, EvaluationContext eContext)
void	setValue(ExpressionState state, Object newValue) Evaluate the expression to a node and then set the new value on that node.
String	toStringAST()

Methods inherited from class org.springframework.expression.spel.ast.SpelNodeImpl

getChild, getChildCount, getEndPosition, getObjectClass, getPreviousChild, getStartPosition, getTypedValue, getValue, getValue, nextChildIs

Methods inherited from class java.lang.Object

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

Constructor Detail

PropertyOrFieldReference

public PropertyOrFieldReference(boolean nullSafe,
                                String propertyOrFieldName,
                                int pos)

Method Detail

isNullSafe

public boolean isNullSafe()

getName

public String getName()

getValueRef

public ValueRef getValueRef(ExpressionState state)
                     throws EvaluationException

Overrides:

getValueRef in class SpelNodeImpl

Throws:

EvaluationException

getValueInternal

public TypedValue getValueInternal(ExpressionState state)
                            throws EvaluationException

Specified by:

getValueInternal in class SpelNodeImpl

Throws:

EvaluationException

setValue

public void setValue(ExpressionState state,
                     Object newValue)
              throws SpelEvaluationException

Description copied from interface: SpelNode

Evaluate the expression to a node and then set the new value on that node. For example, if the expression evaluates to a property reference then the property will be set to the new value.

Specified by:

setValue in interface SpelNode

Overrides:

setValue in class SpelNodeImpl

Parameters:

state - the current expression state (includes the context)

newValue - the new value

Throws:

SpelEvaluationException

isWritable

public boolean isWritable(ExpressionState state)
                   throws SpelEvaluationException

Description copied from interface: SpelNode

Determine if this expression node will support a setValue() call.

Specified by:

isWritable in interface SpelNode

Overrides:

isWritable in class SpelNodeImpl

Parameters:

state - the current expression state (includes the context)

Returns:

true if the expression node will allow setValue()

Throws:

SpelEvaluationException

toStringAST

public String toStringAST()

Specified by:

toStringAST in interface SpelNode

Specified by:

toStringAST in class SpelNodeImpl

Returns:

the string form of this AST node

isWritableProperty

public boolean isWritableProperty(String name,
                                  TypedValue contextObject,
                                  EvaluationContext eContext)
                           throws SpelEvaluationException

Throws:

SpelEvaluationException