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

public final class Variable

extends Operator

implements java.lang.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

Constructor Summary

Variable()
A default Class Constructor.

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

Method Summary

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

Returns the name of this.

Returns:

The name of this.

getClassType

public java.lang.Class getClassType()

Returns the class type of the value contained in this.

Returns:

The class type of value contained in this.

getValue

public java.lang.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(java.lang.Object object)

Stores the given value in this.

Parameters:

object - The value to be stored.

getParameterSignature

public java.lang.Class[] getParameterSignature()

Returns the parameter signature of this

Returns:

An array of Class that has parameter signature.

Overrides:

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

isEqualitySubExpression

protected boolean isEqualitySubExpression(int index)

Overrides:

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

compareTo

public int compareTo(java.lang.Object object)
              throws java.lang.ClassCastException

Specified by:

compareTo in interface java.lang.Comparable