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 io.atlasmap.expression.internal.ConstantExpression.BooleanConstantExpression	FALSE	false.
static io.atlasmap.expression.internal.ConstantExpression.BooleanConstantExpression	NULL	null.
static io.atlasmap.expression.internal.ConstantExpression.BooleanConstantExpression	TRUE	true.

Fields inherited from interface io.atlasmap.expression.Expression

CACHE

Constructor Summary

Constructors

Constructor	Description
ConstantExpression(Object value)	A constructor.

Method Summary

Modifier and Type	Method	Description
static ConstantExpression	createFloat(String text)	Creates from the float.
static ConstantExpression	createFromDecimal(String text)	Creates from the decimal.
static ConstantExpression	createFromHex(String text)	Creates from the hex.
static ConstantExpression	createFromOctal(String text)	Creates from the octal.
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()
io.atlasmap.v2.Field	evaluate(ExpressionContext expressionContext)	Evaluates the expression.
Object	getValue()	Gets the value.
int	hashCode()	TODO: more efficient hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

NULL

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

null.

TRUE

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

true.

FALSE

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

false.

Constructor Detail

ConstantExpression

public ConstantExpression(Object value)

A constructor.

Parameters:

value - value

Method Detail

createFromDecimal

public static ConstantExpression createFromDecimal(String text)

Creates from the decimal.

Parameters:

text - decimal

Returns:

result

createFromHex

public static ConstantExpression createFromHex(String text)

Creates from the hex.

Parameters:

text - hex

Returns:

result

createFromOctal

public static ConstantExpression createFromOctal(String text)

Creates from the octal.

Parameters:

text - octal

Returns:

result

createFloat

public static ConstantExpression createFloat(String text)

Creates from the float.

Parameters:

text - float

Returns:

result

evaluate

public io.atlasmap.v2.Field evaluate(ExpressionContext expressionContext)
                              throws ExpressionException

Evaluates the expression.

Specified by:

evaluate in interface Expression

Parameters:

expressionContext - expression context

Returns:

Field

Throws:

ExpressionException - If evaluation fails

getValue

public Object getValue()

Gets the value.

Returns:

value

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