org.springframework.expression.spel.ast
Class OpMinus

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

All Implemented Interfaces:

SpelNode

public class OpMinus
extends Operator

The minus operator supports:

• subtraction of doubles (floats are represented as doubles)
• subtraction of longs
• subtraction of integers
• subtraction of an int from a string of one character (effectively decreasing that character), so 'd'-3='a'

It can be used as a unary operator for numbers (double/long/int). The standard promotions are performed when the operand types vary (double-int=double). For other options it defers to the registered overloader.

Since:

3.0

Author:

Andy Clement

Field Summary

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

children, pos

Constructor Summary

OpMinus(int pos, SpelNodeImpl... operands)

Method Summary

SpelNodeImpl	getRightOperand()
TypedValue	getValueInternal(ExpressionState state)
String	toStringAST() String format for all operators is the same '(' [operand] [operator] [operand] ')'

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

getLeftOperand, getOperatorName

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

OpMinus

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

Method Detail

getValueInternal

public TypedValue getValueInternal(ExpressionState state)
                            throws EvaluationException

Specified by:

getValueInternal in class SpelNodeImpl

Throws:

EvaluationException

toStringAST

public String toStringAST()

Description copied from class: Operator

String format for all operators is the same '(' [operand] [operator] [operand] ')'

Specified by:

toStringAST in interface SpelNode

Overrides:

toStringAST in class Operator

Returns:

the string form of this AST node

getRightOperand

public SpelNodeImpl getRightOperand()

Overrides:

getRightOperand in class Operator