/*******************************************************************************
* Copyright (c) 2006 Oracle Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Oracle Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.bpel.xpath10;
import java.util.ArrayList;
import java.util.List;
/**
* A filter expression.
*
* @author Michal Chmielewski (michal.chmielewski@oracle.com)
* @date Aug 26, 2008
*
*/
public class FilterExpr extends Expr {
List<Predicate> fList = new ArrayList<Predicate>();
Expr fExpr;
/**
* Brand new shiny filter expression.
*
* @param expr the expression to which the filter (predicates) are to be applied.
*/
public FilterExpr (Expr expr) {
super(expr.toString());
fExpr = expr;
}
/**
* @return the expression that is to be predicated.
*/
public Expr getExpr () {
return fExpr;
}
/**
* @return a list of predicates for this filter.
*/
public List<Predicate> getPredicates() {
return fList;
}
/**
* Add a predicate to the filter list.
* @param p the predicate to add.
*/
public void addPredicate (Predicate p) {
fList.add(p);
}
/**
* @return true if yes, false if no.
*/
public boolean hasPredicates ()
{
return fList.size() > 0;
}
@Override
protected String asText()
{
StringBuilder sb = new StringBuilder();
if ( fExpr != null ) {
sb.append(fExpr.getText());
}
for(Predicate p : fList) {
sb.append(p.getText());
}
return sb.toString();
}
/**
* @see org.eclipse.bpel.xpath10.Expr#getPosition()
*/
@Override
public int getPosition () {
return fExpr != null ? fExpr.getPosition() : -1;
}
/**
* @see org.eclipse.bpel.xpath10.Expr#getEndPosition()
*/
@Override
public int getEndPosition () {
return fExpr != null ? fExpr.getEndPosition() : -1;
}
}