org.springframework.expression.spel.ast

Class OpPlus

java.lang.Object

org.springframework.expression.spel.ast.SpelNodeImpl

org.springframework.expression.spel.ast.Operator

org.springframework.expression.spel.ast.OpPlus

All Implemented Interfaces:

SpelNode

public class OpPlus
extends Operator

The plus operator will:

• add doubles (floats are represented as doubles)
• add longs
• add integers
• concatenate strings

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, Ivo Smid

Field Summary

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

operatorName

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

children, pos

Constructor Summary

Constructors

Constructor and Description
OpPlus(int pos, SpelNodeImpl... operands)

Method Summary

Methods

Modifier and Type	Method and Description
private static java.lang.String	convertTypedValueToString(TypedValue value, ExpressionState state) Convert operand value to string using registered converter or using toString method.
SpelNodeImpl	getRightOperand()
TypedValue	getValueInternal(ExpressionState state)
java.lang.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, getValueRef, isWritable, nextChildIs, setValue

Methods inherited from class java.lang.Object

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

Constructor Detail

OpPlus

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

Method Detail

getValueInternal

public TypedValue getValueInternal(ExpressionState state)
                            throws EvaluationException

Specified by:

getValueInternal in class SpelNodeImpl

Throws:

EvaluationException

toStringAST

public java.lang.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

convertTypedValueToString

private static java.lang.String convertTypedValueToString(TypedValue value,
                                         ExpressionState state)

Convert operand value to string using registered converter or using toString method.

Parameters:

value - typed value to be converted

state - expression state

Returns:

TypedValue instance converted to String