001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.xbean.propertyeditor;
018    
019    import java.io.File;
020    import java.net.MalformedURLException;
021    import java.net.URL;
022    
023    /**
024     * A property editor for URL typed properties.
025     *
026     * @version $Rev: 6680 $
027     */
028    public class URLEditor extends AbstractConverter {
029        public URLEditor() {
030            super(URL.class);
031        }
032    
033        /**
034         * Convert the text value of the property into a URL object instance.
035         *
036         * @return a URL object constructed from the property text value.
037         */
038        protected Object toObjectImpl(String text) {
039            try {
040                // try to create directly from the text property.
041                URL url = new URL(text);
042                // this parsed correctly, but if this is a file object,
043                // we need to make sure this gets converted into the proper
044                // absolute directory form.
045                try {
046                    if (url.getProtocol().equals("file")) {
047                        // ok, this is a file URL, so get the file string portion,
048                        // convert that to a file object, then go through the URI()/URL()
049                        // conversion sequence to get a fully valid URL().
050                        return new File(url.getFile()).toURI().toURL();
051                    }
052                } catch (Exception e) {
053                    // any error here is returned as a property editor exception.
054                    throw new PropertyEditorException(e);
055                }
056    
057                return url;
058            } catch (MalformedURLException e) {
059                // this is a format error, but it could have been specified as a local
060                // file name. so try to create a file object and make a URL from that.
061            }
062    
063            try {
064                // The file class has direct support for returning as a URL, but the Javadoc
065                // for File.toURL() recommends converting the File object to a URI first
066                // so that untranslatable characters get handled correctly.
067                return new File(text).toURI().toURL();
068            } catch (MalformedURLException e) {
069                // any error here is returned as a property editor exception.
070                throw new PropertyEditorException(e);
071            }
072        }
073    }