/*
* Copyright 2009 Ralf Joachim, Ahmad Hassan
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.castor.cpa.persistence.sql.query.condition;
import java.util.ArrayList;
import java.util.Iterator;
/**
* Compound condition is the abstract base class for AndCondition and OrCondition.
*
* @author <a href="mailto:ahmad DOT hassan AT gmail DOT com">Ahmad Hassan</a>
* @author <a href="mailto:ralf DOT joachim AT syscon DOT eu">Ralf Joachim</a>
* @version $Revision$ $Date: 2006-04-25 15:08:23 -0600 (Tue, 25 Apr 2006) $
*/
public abstract class CompoundCondition extends Condition {
//-----------------------------------------------------------------------------------
/** List of conditions. */
private ArrayList<Condition> _conditions = new ArrayList<Condition>();
//-----------------------------------------------------------------------------------
/**
* Default constructor.
*/
protected CompoundCondition() {
super();
}
/**
* Copy constructor.
*
* @param condition Compound condition to create a copy of.
*/
protected CompoundCondition(final CompoundCondition condition) {
super();
_conditions.addAll(condition._conditions);
}
//-----------------------------------------------------------------------------------
/**
* Inserts the specified condition at begin of this list of conditions.
*
* @param condition Condition to be inserted to this list of conditions.
*/
protected final void insert(final Condition condition) {
if (condition == null) { throw new NullPointerException(); }
_conditions.add(0, condition);
}
/**
* Appends the specified condition to end of this list of conditions.
*
* @param condition Condition to be appended to this list of conditions.
*/
protected void append(final Condition condition) {
if (condition == null) { throw new NullPointerException(); }
_conditions.add(condition);
}
/**
* Returns an iterator over the elements in this list in proper sequence.
*
* @return An iterator over the elements in this list in proper sequence.
*/
public final Iterator<Condition> iterator() {
return _conditions.iterator();
}
//-----------------------------------------------------------------------------------
}