/*
* Copyright 2008 Udai Gupta, Ralf Joachim
*
* 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.query.object.condition;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.castor.cpa.query.Condition;
/**
* Abstract base class compound condition.
*
* @author <a href="mailto:mailtoud AT gmail DOT com">Udai Gupta</a>
* @author <a href="mailto:ralf DOT joachim AT syscon DOT eu">Ralf Joachim</a>
* @version $Revision: 7121 $ $Date: 2006-04-25 16:09:10 -0600 (Tue, 25 Apr 2006) $
* @since 1.3
*/
public abstract class CompoundCondition extends AbstractCondition {
//--------------------------------------------------------------------------
/** List of conditions. */
private List < Condition > _conditions = new ArrayList < Condition > ();
//--------------------------------------------------------------------------
/**
* Get operator of the compound condition.
*
* @return Operator of the compound condition.
*/
protected abstract String getOperator();
/**
* {@inheritDoc}
*/
public final Condition not() {
Not n = new Not();
n.setCondition(this);
return n;
}
//--------------------------------------------------------------------------
/**
* Add condition to the end of the list.
*
* @param condition Condition to add to end of list.
*/
public final void addCondition(final Condition condition) {
if (condition == null) { throw new NullPointerException(); }
_conditions.add(condition);
}
/**
* Add all conditions to the end of the list.
*
* @param conditions List of condition to add to end of list.
*/
public final void addAllConditions(final List < Condition > conditions) {
if (conditions.contains(null)) { throw new NullPointerException(); }
_conditions.addAll(conditions);
}
/**
* Get list of conditions.
*
* @return List of conditions.
*/
public final List < Condition > getConditions() {
return _conditions;
}
//--------------------------------------------------------------------------
/**
* {@inheritDoc}
*/
public final StringBuilder toString(final StringBuilder sb) {
for (Iterator < Condition > iter = _conditions.iterator(); iter.hasNext(); ) {
Condition condition = iter.next();
if (condition instanceof CompoundCondition) {
sb.append('(');
condition.toString(sb);
sb.append(')');
} else if (condition != null) {
condition.toString(sb);
}
if (iter.hasNext()) { sb.append(getOperator()); }
}
return sb;
}
//--------------------------------------------------------------------------
}