org.omwg.mediation.language.objectModel
Class AttributeExpr

java.lang.Object
  org.omwg.mediation.language.objectModel.Expression
      org.omwg.mediation.language.objectModel.AttributeExpr

public class AttributeExpr
extends Expression

Extends Expression - constructs a relation expression consisting of either an Id, an expression definition, or an array list of sub-expressions and a string representation (operator)

Version:

$Revision: 1.4 $ $Date: 2005/06/20 09:54:04 $

Author:

Francois Scharffe, Adrian Mocan Created on 23-Mar-2005 Committed by $Author: grahamhench $ $Source: /cvsroot/dome//dome/src/org/omwg/mediation/language/objectModel/AttributeExpr.java,v $,

Field Summary

Fields inherited from class org.omwg.mediation.language.objectModel.Expression

AND_OPERATOR, INVERSE_OPERATOR, JOIN_OPERATOR, NOT_OPERATOR, OR_OPERATOR, REFLEXIVE_OPERATOR, SYMMETRIC_OPERATOR, TRANS_OPERATOR

Constructor Summary

AttributeExpr(java.util.ArrayList subExpressions, java.lang.String operator)
Constructs an attribute expression object with an array list of sub-expressions and a string representation (operator)

AttributeExpr(Id id)
Constructs an attribute expression object with an id

Method Summary

boolean	addExpression(AttributeExpr expression) Sends the attribute expression to the Expression class.
boolean	addExpression(AttributeExpr expression, int index) Sends the attribute expression and index to the Expression class.
java.lang.Object	clone() Copies the attributeExpr object
Expression	getSubExpression(int index) Returns the specific attribute expression definition from the array list of sub-expressions when the attribute expression is complex.
java.util.ArrayList	getSubExpressionsList() Returns the array list of sub-expressions when the attribute expression is complex.

Methods inherited from class org.omwg.mediation.language.objectModel.Expression

getId, getOperator, isComplexExpression, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

AttributeExpr

public AttributeExpr(Id id)

Constructs an attribute expression object with an id

Parameters:

id -

AttributeExpr

public AttributeExpr(java.util.ArrayList subExpressions,
                     java.lang.String operator)

Constructs an attribute expression object with an array list of sub-expressions and a string representation (operator)

Parameters:

subExpressions - (array list of sub-expressions)

operator - (string type)

Method Detail

getSubExpressionsList

public java.util.ArrayList getSubExpressionsList()

Returns the array list of sub-expressions when the attribute expression is complex. Otherwise, returns null

Specified by:

getSubExpressionsList in class Expression

Returns:

attributeExpressionList (array list)

getSubExpression

public Expression getSubExpression(int index)

Returns the specific attribute expression definition from the array list of sub-expressions when the attribute expression is complex. If not, or if the integer parameter (index) is out of bounds, then the method returns null

Specified by:

getSubExpression in class Expression

Parameters:

index - (int type)

Returns:

attribute expression definition

addExpression

public boolean addExpression(AttributeExpr expression)

Sends the attribute expression to the Expression class. Adds expression to a complex expression, if the sub-expression array list is not empty - then returns true. Otherwise returns false.

Parameters:

expression - (AttributeExpr object)

Returns:

boolean (true, if expression is added - false if not)

addExpression

public boolean addExpression(AttributeExpr expression,
                             int index)

Sends the attribute expression and index to the Expression class. Adds expression to a complex expression. If the index is negative or greater than the size of the sub-expression array list, then false is returned. If the sub-expression array list is not empty - then returns true. Otherwise returns false.

Parameters:

expression - (AttributeExpr object)

index - (int type)

Returns:

boolean (true, if expression is added - false if not)

clone

public java.lang.Object clone()

Copies the attributeExpr object

Specified by:

clone in class Expression

Returns:

new attributeExpr object