jelly-tags/swing/src/java/org/apache/commons/jelly/tags/swing/converters/PointConverter.java

/*
 * Copyright 2002,2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.jelly.tags.swing.converters;

import java.awt.Point;
import java.util.StringTokenizer;

import org.apache.commons.beanutils.Converter;

/**
 * A Converter that turns Strings in the form "x, y" into Point objects
 *
 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
 * @version $Revision: 1.7 $
 */
public class PointConverter implements Converter {

    public Object convert(Class type, Object value) {
        if ( value != null ) {
            String text = value.toString();
            StringTokenizer pointEnum = new StringTokenizer( text, "," );
            int x = 0;
            int y = 0;
            if ( pointEnum.hasMoreTokens() ) {
                x = parseNumber( pointEnum.nextToken() );
            }
            if ( pointEnum.hasMoreTokens() ) {
                y = parseNumber( pointEnum.nextToken() );
            }

            // now lets parse the Point...
            return new Point( x, y );
        }
        return null;
    }

    protected int parseNumber(String text) {
        text = text.trim();
        return Integer.parseInt(text);
    }

}