/*
* Geotoolkit - An Open Source Java GIS Toolkit
* http://www.geotoolkit.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
* (C) 2009, Geomatys
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotoolkit.filter.binaryexpression;
import org.geotoolkit.filter.AbstractExpression;
import org.opengis.filter.expression.BinaryExpression;
import org.opengis.filter.expression.Expression;
import static org.apache.sis.util.ArgumentChecks.*;
/**
* Immutable abstract binary expression.
*
* @author Johann Sorel (Geomatys)
* @param <E> Expression or subclass
* @param <F> Expression or subclass
* @module
*/
public abstract class AbstractBinaryExpression<E extends Expression,F extends Expression>
extends AbstractExpression implements BinaryExpression{
protected final E left;
protected final F right;
protected AbstractBinaryExpression(final E left, final F right){
ensureNonNull("left", left);
ensureNonNull("right", right);
this.left = left;
this.right = right;
}
/**
* {@inheritDoc }
*/
@Override
public E getExpression1() {
return left;
}
/**
* {@inheritDoc }
*/
@Override
public F getExpression2() {
return right;
}
}