/*
* 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;
import org.castor.cpa.query.Condition;
import org.castor.cpa.query.Field;
import org.castor.cpa.query.InCondition;
import org.castor.cpa.query.object.condition.In;
import org.castor.cpa.query.object.condition.Null;
import org.castor.cpa.query.object.expression.AbstractExpression;
/**
* Abstract base class for Field, Schema and Projection.
*
* @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 AbstractField extends AbstractExpression implements Field {
//--------------------------------------------------------------------------
/**
* {@inheritDoc}
*/
public final Field field(final String name) {
return new FieldImpl(this, name);
}
//--------------------------------------------------------------------------
/**
* {@inheritDoc}
*/
public final InCondition in() {
In cond = new In();
cond.setExpression(this);
cond.setNot(false);
return cond;
}
/**
* {@inheritDoc}
*/
public final InCondition notIn() {
In cond = new In();
cond.setExpression(this);
cond.setNot(true);
return cond;
}
/**
* {@inheritDoc}
*/
public final Condition isNull() {
Null cond = new Null();
cond.setExpression(this);
cond.setNot(false);
return cond;
}
/**
* {@inheritDoc}
*/
public final Condition isNotNull() {
Null cond = new Null();
cond.setExpression(this);
cond.setNot(true);
return cond;
}
//--------------------------------------------------------------------------
}