/*
* Geotoolkit - An Open Source Java GIS Toolkit
* http://www.geotoolkit.org
*
* (C) 2005-2008, Open Source Geospatial Foundation (OSGeo)
*
* 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;
public class StartsWithFunction extends AbstractFunction {
public StartsWithFunction(final Expression expr1, final Expression expr2) {
super(StringFunctionFactory.STARTS_WITH, new Expression[]{expr1,expr2}, null);
}
@Override
public Object evaluate(final Object feature) {
String arg0;
String arg1;
try { // attempt to get value and perform conversion
arg0 = parameters.get(0).evaluate(feature, String.class); // extra
// protection
// for
// strings
} catch (Exception e) // probably a type error
{
throw new IllegalArgumentException(
"Filter Function problem for function strStartsWith argument #0 - expected type String");
}
try { // attempt to get value and perform conversion
arg1 = parameters.get(1).evaluate(feature, String.class); // extra
// protection
// for
// strings
} catch (Exception e) // probably a type error
{
throw new IllegalArgumentException(
"Filter Function problem for function strStartsWith argument #1 - expected type String");
}
return StaticUtils.strStartsWith(arg0, arg1);
}
}