Package io.atlasmap.expression.internal

Class ConstantExpression

java.lang.Object

io.atlasmap.expression.internal.ConstantExpression

All Implemented Interfaces:

Expression

public class ConstantExpression
extends Object
implements Expression

Represents a constant expression.

Version:

$Revision: 1.2 $

Field Summary

Fields

Modifier and Type	Field	Description
static final io.atlasmap.expression.internal.ConstantExpression.BooleanConstantExpression	FALSE
static final io.atlasmap.expression.internal.ConstantExpression.BooleanConstantExpression	NULL
static final io.atlasmap.expression.internal.ConstantExpression.BooleanConstantExpression	TRUE

Fields inherited from interface io.atlasmap.expression.Expression

CACHE

Constructor Summary

Constructors

Constructor	Description
ConstantExpression(Object value)

Method Summary

Modifier and Type	Method	Description
static ConstantExpression	createFloat(String text)
static ConstantExpression	createFromDecimal(String text)
static ConstantExpression	createFromHex(String text)
static ConstantExpression	createFromOctal(String text)
static String	encodeString(String s)	Encodes the value of string so that it looks like it would look like when it was provided in a selector.
boolean	equals(Object o)	TODO: more efficient hashCode()
Field	evaluate(ExpressionContext expressionContext)	Execute the expression against the given context.
Object	getValue()
int	hashCode()	TODO: more efficient hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

NULL

public static final io.atlasmap.expression.internal.ConstantExpression.BooleanConstantExpression NULL

TRUE

public static final io.atlasmap.expression.internal.ConstantExpression.BooleanConstantExpression TRUE

FALSE

public static final io.atlasmap.expression.internal.ConstantExpression.BooleanConstantExpression FALSE

Constructor Details

ConstantExpression

public ConstantExpression(Object value)

Method Details

createFromDecimal

public static ConstantExpression createFromDecimal(String text)

createFromHex

public static ConstantExpression createFromHex(String text)

createFromOctal

public static ConstantExpression createFromOctal(String text)

createFloat

public static ConstantExpression createFloat(String text)

evaluate

public Field evaluate(ExpressionContext expressionContext)
               throws ExpressionException

Description copied from interface: Expression

Execute the expression against the given context.

Specified by:

evaluate in interface Expression

Parameters:

expressionContext - ExpressionContext

Returns:

Field represents a result

Throws:

ExpressionException - If evaluation fails

getValue

public Object getValue()

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

TODO: more efficient hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

TODO: more efficient hashCode()

Overrides:

equals in class Object

encodeString

public static String encodeString(String s)

Encodes the value of string so that it looks like it would look like when it was provided in a selector.

Parameters:

s - String to encode

Returns:

encoded String