/*
* This file is part of the GeoLatte project.
*
* GeoLatte 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, either version 3 of the License, or
* (at your option) any later version.
*
* GeoLatte 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.
*
* You should have received a copy of the GNU Lesser General Public License
* along with GeoLatte. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright (C) 2010 - 2010 and Ownership of code is shared by:
* Qmino bvba - Romeinsestraat 18 - 3001 Heverlee (http://www.qmino.com)
* Geovise bvba - Generaal Eisenhowerlei 9 - 2140 Antwerpen (http://www.geovise.com)
*/
package org.geolatte.common.expressions;
import org.geolatte.common.reflection.EntityClassReader;
import org.geolatte.common.reflection.InvalidObjectReaderException;
/**
* <p>
* Represents a String valued property.
* <br>
* <p>
* <i>Creation-Date</i>: 9-apr-2010<br>
* <i>Creation-Time</i>: 11:48:54<br>
* </p>
*
* @author Peter Rigole
* @author Bert Vanhooff
* @author <a href="http://www.qmino.com">Qmino bvba</a>
* @since SDK1.5
*/
public class StringProperty extends StringExpression implements PropertyExpression<String> {
private final String propertyName;
/**
* Constructor.
*
* @param propertyName The name of the property that will be evaluated. If propertyName is null, the object itself is the string.
*/
public StringProperty(String propertyName) {
this.propertyName = propertyName;
}
public String evaluate(Object o) {
if (propertyName == null)
return o.toString();
EntityClassReader classReader = EntityClassReader.getClassReaderFor(o.getClass());
Object result = null;
try {
result = classReader.getPropertyValue(o, propertyName);
}
catch (InvalidObjectReaderException e) {
; // can never occur
}
return result == null ? null : result.toString();
}
public String getPropertyName() {
return propertyName;
}
}