org.springframework.expression.spel.ast
Class OperatorInstanceof

java.lang.Object
  org.springframework.expression.spel.ast.SpelNodeImpl
      org.springframework.expression.spel.ast.Operator
          org.springframework.expression.spel.ast.OperatorInstanceof

All Implemented Interfaces:

SpelNode

public class OperatorInstanceof
extends Operator

The operator 'instanceof' checks if an object is of the class specified in the right hand operand, in the same way that instanceof does in Java.

Since:

3.0

Author:

Andy Clement

Field Summary

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

children, pos

Constructor Summary

OperatorInstanceof(int pos, SpelNodeImpl... operands)

Method Summary

BooleanTypedValue

getValueInternal(ExpressionState state) Compare the left operand to see it is an instance of the type specified as the right operand.

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

getLeftOperand, getOperatorName, getRightOperand, toStringAST

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

OperatorInstanceof

public OperatorInstanceof(int pos,
                          SpelNodeImpl... operands)

Method Detail

getValueInternal

public BooleanTypedValue getValueInternal(ExpressionState state)
                                   throws EvaluationException

Compare the left operand to see it is an instance of the type specified as the right operand. The right operand must be a class.

Specified by:

getValueInternal in class SpelNodeImpl

Parameters:

state - the expression state

Returns:

true if the left operand is an instanceof of the right operand, otherwise false

Throws:

EvaluationException - if there is a problem evaluating the expression