001/*
002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     bstefanescu
018 */
019package org.nuxeo.ecm.core.event.script;
020
021import java.io.IOException;
022import java.io.InputStreamReader;
023import java.io.Reader;
024import java.net.URL;
025
026/**
027 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
028 */
029public class JARUrlScript extends Script {
030
031    protected final URL url;
032
033    protected final URL jar;
034
035    public JARUrlScript(URL jar, URL url) {
036        this.url = url;
037        this.jar = jar;
038    }
039
040    @Override
041    public String getExtension() {
042        return getExtension(url.getPath());
043    }
044
045    @Override
046    public String getLocation() {
047        return url.toExternalForm();
048    }
049
050    @Override
051    public Reader getReader() throws IOException {
052        return new InputStreamReader(url.openStream());
053    }
054
055    @Override
056    public Reader getReaderIfModified() throws IOException {
057        long tm = jar.openConnection().getLastModified();
058        if (tm > lastModified) {
059            synchronized (this) {
060                if (tm > lastModified) {
061                    lastModified = tm;
062                    return new InputStreamReader(url.openStream());
063                }
064            }
065        }
066        return null;
067    }
068
069}