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com.bea.p13n.expression.operator
Class Variable

java.lang.Object
com.bea.p13n.expression.internal.ComplexExpressionImpl
com.bea.p13n.expression.operator.Operator
com.bea.p13n.expression.operator.Variable

All Implemented Interfaces

Expression, com.bea.p13n.expression.ExpressionEvents, Serializable, Cloneable, Comparable

public final class Variable

extends Operator

implements Comparable

Implementation of the Variable operator. The variable operator defines a place-holder for a variable that will be substituted during unification.
Input 1: A String (or Expression returning a String) that is the name of the variable.
Input 2: A Class (or Expression returning a Class) that is the type of the variable.

See Also

Serialized Form

Field Summary

Fields inherited from interface com.bea.p13n.expression.ExpressionEvents

EVENT_ADD_SUBEXPRESSION, EVENT_CLEAR_CACHE, EVENT_INTERNAL_MAX, EVENT_REMOVE_SUBEXPRESSION, EVENT_SET_CACHE_ENABLED, EVENT_SET_CACHED_VALUE, EVENT_SET_PARENT, EVENT_SET_SOURCE, EVENT_SET_SUBEXPRESSION, EVENT_SET_USER_DATA

Constructor Summary

Variable()
A default Class Constructor.

Variable(String name, Class type)
A class constructor that constructs a variable by assigning a name and a class type.

Method Summary

int	compareTo(Object object)
Class	getClassType() Returns the class type of the value contained in this.
String	getName() Returns the name of this.
Class[]	getParameterSignature() Returns the parameter signature of this
Object	getValue() Returns the value stored in this.
boolean	isBound()
protected boolean	isEqualitySubExpression(int index)
void	setValue(Object object) Stores the given value in this.

Methods inherited from class com.bea.p13n.expression.operator.Operator

leftHandSide, operand, rightHandSide

Methods inherited from class com.bea.p13n.expression.internal.ComplexExpressionImpl

addListener, addSubExpression, clearCache, clone, createProxyExpression, equals, getCachedValue, getParent, getSource, getSubExpression, getSubExpressionCount, getUserData, hashCode, isCached, isCacheEnabled, notifyListeners, removeAllSubExpressions, removeListener, removeSubExpression, removeSubExpression, setCachedValue, setCacheEnabled, setParent, setSource, setSubExpression, setUserData, toString, write

Methods inherited from class java.lang.Object

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

Constructor Detail

Variable

public Variable()

A default Class Constructor.

Variable

public Variable(String name,
                Class type)

A class constructor that constructs a variable by assigning a name and a class type.

Parameters

name - A name for naming the variable. The variable name should start with '?'. For example, "?variableName", "?name" are valid variable names.

type - A class type of the value that this holds.

Method Detail

getName

public String getName()

Returns the name of this.

Returns

The name of this.

getClassType

public Class getClassType()

Returns the class type of the value contained in this.

Returns

The class type of value contained in this.

getValue

public Object getValue()

Returns the value stored in this.

Returns

The value stored in this variable.

isBound

public boolean isBound()

Returns

true If this is bound to a value otherwise false.

setValue

public void setValue(Object object)

Stores the given value in this.

Parameters

object - The value to be stored.

getParameterSignature

public Class[] getParameterSignature()

Returns the parameter signature of this

Specified by:

getParameterSignature in interface Expression

Returns

An array of Class that has parameter signature.

isEqualitySubExpression

protected boolean isEqualitySubExpression(int index)

Overrides:

isEqualitySubExpression in class com.bea.p13n.expression.internal.ComplexExpressionImpl

compareTo

public int compareTo(Object object)
              throws ClassCastException

Specified by:

compareTo in interface Comparable

Throws

ClassCastException

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