/*
* Geotoolkit - An Open Source Java GIS Toolkit
* http://www.geotoolkit.org
*
* (C) 2009, 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.function.math;
import org.geotoolkit.filter.function.AbstractFunction;
import org.opengis.filter.expression.Expression;
public class AbsFunction extends AbstractFunction {
public AbsFunction(final Expression expression) {
super(MathFunctionFactory.ABS, new Expression[] {expression}, null);
}
@Override
public Object evaluate(final Object feature) {
final Number number = parameters.get(0).evaluate(feature, Number.class);
if (number == null) {
throw new IllegalArgumentException(
"Filter Function problem for function abs argument #0 - expected type number");
}
if (number instanceof Integer) {
return Math.abs(number.intValue());
}
if (number instanceof Double) {
return Math.abs(number.doubleValue());
}
if (number instanceof Float) {
return Math.abs(number.floatValue());
}
if (number instanceof Long) {
return Math.abs(number.longValue());
}
if (number instanceof Short) {
return Math.abs(number.shortValue());
}
throw new IllegalArgumentException(
"Filter Function problem for function abs argument #0 - expected type number");
}
}