trunk/xbean-reflect/src/main/java/org/apache/xbean/propertyeditor/URLEditor.java

/**
 *
 * Copyright 2005-2006 The Apache Software Foundation or its licensors, as applicable.
 *
 *  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.xbean.propertyeditor;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;

/**
 * A property editor for URL typed properties.
 *
 * @version $Rev: 6680 $
 */
public class URLEditor extends AbstractConverter {
    public URLEditor() {
        super(URL.class);
    }

    /**
     * Convert the text value of the property into a URL object instance.
     *
     * @return a URL object constructed from the property text value.
     */
    protected Object toObjectImpl(String text) {
        try {
            // try to create directly from the text property.
            URL url = new URL(text);
            // this parsed correctly, but if this is a file object,
            // we need to make sure this gets converted into the proper
            // absolute directory form.
            try {
                if (url.getProtocol().equals("file")) {
                    // ok, this is a file URL, so get the file string portion,
                    // convert that to a file object, then go through the URI()/URL()
                    // conversion sequence to get a fully valid URL().
                    return new File(url.getFile()).toURI().toURL();
                }
            } catch (Exception e) {
                // any error here is returned as a property editor exception.
                throw new PropertyEditorException(e);
            }

            return url;
        } catch (MalformedURLException e) {
            // this is a format error, but it could have been specified as a local
            // file name. so try to create a file object and make a URL from that.
        }

        try {
            // The file class has direct support for returning as a URL, but the Javadoc
            // for File.toURL() recommends converting the File object to a URI first
            // so that untranslatable characters get handled correctly.
            return new File(text).toURI().toURL();
        } catch (MalformedURLException e) {
            // any error here is returned as a property editor exception.
            throw new PropertyEditorException(e);
        }
    }
}