/*
* Geotoolkit - An Open Source Java GIS Toolkit
* http://www.geotoolkit.org
*
* (C) 2005-2008, Open Source Geospatial Foundation (OSGeo)
* (C) 2010, 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.function.string;
import org.geotoolkit.filter.function.AbstractFunction;
import org.geotoolkit.filter.function.other.StaticUtils;
import org.opengis.filter.expression.Expression;
/**
*
* @author Johann Sorel (Geomatys)
* @module
*/
public class TruncateLastFunction extends AbstractFunction {
public TruncateLastFunction(final Expression expression, final Expression lenghtExp) {
super(StringFunctionFactory.TRUNCATE_LAST, new Expression[]{expression,lenghtExp}, null);
}
@Override
public Object evaluate(final Object feature) {
String arg0;
try {
// attempt to get value and perform conversion
arg0 = parameters.get(0).evaluate(feature, String.class);
// extra protection forstrings
} catch (Exception e) {
// probably a type error
throw new IllegalArgumentException(
"Filter Function problem for function strTruncate argument #0 - expected type String");
}
final int lenght = parameters.get(1).evaluate(feature, Integer.class);
return StaticUtils.strTruncateLast(arg0, lenght);
}
}