org.springframework.expression.spel.ast
Class Literal

java.lang.Object
  org.springframework.expression.spel.ast.SpelNodeImpl
      org.springframework.expression.spel.ast.Literal

All Implemented Interfaces:

SpelNode

Direct Known Subclasses:

BooleanLiteral, FloatLiteral, IntLiteral, LongLiteral, NullLiteral, RealLiteral, StringLiteral

public abstract class Literal
extends SpelNodeImpl

Common superclass for nodes representing literals (boolean, string, number, etc).

Author:

Andy Clement

Field Summary

protected String

literalValue

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

children, pos

Constructor Summary

Literal(String payload, int pos)

Method Summary

static Literal	getIntLiteral(String numberToken, int pos, int radix) Process the string form of a number, using the specified base if supplied and return an appropriate literal to hold it.
abstract TypedValue	getLiteralValue()
static Literal	getLongLiteral(String numberToken, int pos, int radix)
static Literal	getRealLiteral(String numberToken, int pos, boolean isFloat)
TypedValue	getValueInternal(ExpressionState state)
String	toString()
String	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, wait, wait, wait

Field Detail

literalValue

protected String literalValue

Constructor Detail

Literal

public Literal(String payload,
               int pos)

Method Detail

getLiteralValue

public abstract TypedValue getLiteralValue()

getValueInternal

public final TypedValue getValueInternal(ExpressionState state)
                                  throws SpelEvaluationException

Specified by:

getValueInternal in class SpelNodeImpl

Throws:

SpelEvaluationException

toString

public String toString()

Overrides:

toString in class Object

toStringAST

public String toStringAST()

Specified by:

toStringAST in interface SpelNode

Specified by:

toStringAST in class SpelNodeImpl

Returns:

the string form of this AST node

getIntLiteral

public static Literal getIntLiteral(String numberToken,
                                    int pos,
                                    int radix)

Process the string form of a number, using the specified base if supplied and return an appropriate literal to hold it. Any suffix to indicate a long will be taken into account (either 'l' or 'L' is supported).

Parameters:

numberToken - the token holding the number as its payload (eg. 1234 or 0xCAFE)

radix - the base of number

Returns:

a subtype of Literal that can represent it

getLongLiteral

public static Literal getLongLiteral(String numberToken,
                                     int pos,
                                     int radix)

getRealLiteral

public static Literal getRealLiteral(String numberToken,
                                     int pos,
                                     boolean isFloat)