| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.ode.bpel.compiler; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.MalformedURLException; |
| import java.net.URI; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| /** |
| * Basic implementation of the {@link ResourceFinder} interface. Resolves |
| * URIs relative to a base URI specified at the time of construction. |
| * |
| * @author Maciej Szefler - m s z e f l e r @ g m a i l . c o m |
| * |
| */ |
| public class DefaultResourceFinder implements ResourceFinder { |
| private static final Log __log = LogFactory.getLog(DefaultResourceFinder.class); |
| |
| private File _relativeDir; |
| private File _absoluteDir; |
| |
| /** |
| * Default constructor: resolve relative URIs against current working directory. |
| */ |
| public DefaultResourceFinder() { |
| _absoluteDir = new File(""); |
| _relativeDir = _absoluteDir; |
| } |
| |
| /** |
| * Constructor: resolve relative URIs against specified directory. |
| * @param relativeDir base path for relative URLs. |
| * @param absoluteDir base path for absolute URLs. |
| */ |
| public DefaultResourceFinder(File relativeDir, File absoluteDir) { |
| checkDir("relativeDir", relativeDir); |
| checkDir("absoluteDir", absoluteDir); |
| _relativeDir = relativeDir; |
| _absoluteDir = absoluteDir; |
| } |
| |
| private void checkDir(String arg, File dir) { |
| if (dir == null) { |
| throw new IllegalArgumentException("Argument '"+arg+"' is null"); |
| } |
| if (!dir.exists()) { |
| throw new IllegalArgumentException("Directory does not exist: " + dir); |
| } |
| } |
| |
| public InputStream openResource(URI uri) throws MalformedURLException, IOException { |
| uri = relativize(uri); |
| |
| InputStream r = openFileResource(uri); |
| if (r != null) { |
| return r; |
| } |
| |
| if (__log.isDebugEnabled()) { |
| __log.debug("trying classpath resource for " + uri); |
| } |
| |
| r = Thread.currentThread().getContextClassLoader().getResourceAsStream(uri.getPath()); |
| if (r != null) { |
| return r; |
| } else { |
| if (__log.isDebugEnabled()) { |
| __log.debug("classpath resource not found " + uri); |
| } |
| return null; |
| } |
| |
| } |
| |
| private InputStream openFileResource(URI uri) throws MalformedURLException, IOException { |
| URI absolute = _absoluteDir.toURI(); |
| if (__log.isDebugEnabled()) { |
| __log.debug("openResource: uri="+uri+" relativeDir="+_relativeDir+" absoluteDir="+_absoluteDir); |
| } |
| |
| if (uri.isAbsolute() && uri.getScheme().equals("file")) { |
| try { |
| return uri.toURL().openStream(); |
| } catch (Exception except) { |
| __log.debug("openResource: unable to open file URL " + uri + "; " + except.toString()); |
| return null; |
| } |
| } |
| |
| // Note that if we get an absolute URI, the relativize operation will simply |
| // return the absolute URI. |
| URI relative = _relativeDir.toURI().relativize(uri); |
| if (relative.isAbsolute() && !(relative.getScheme().equals("urn"))) { |
| __log.fatal("openResource: invalid scheme (should be urn:) " + uri); |
| return null; |
| } |
| |
| File f = new File(absolute.getPath(), relative.getPath()); |
| if (f.exists()) { |
| return new FileInputStream(f); |
| } else { |
| if (__log.isDebugEnabled()) { |
| __log.debug("fileNotFound: " + f); |
| } |
| return null; |
| } |
| } |
| |
| public URI getBaseResourceURI() { |
| return _absoluteDir.toURI(); |
| } |
| |
| private URI relativize(URI u) { |
| if (u.isAbsolute()) { |
| return _absoluteDir.toURI().relativize(u); |
| } else return u; |
| } |
| |
| public URI resolve(URI parent, URI child) { |
| parent = relativize(parent); |
| child = relativize(child); |
| URI result = parent.resolve(child); |
| URI result2 = _absoluteDir.toURI().resolve(result); |
| if (__log.isDebugEnabled()) { |
| __log.debug("resolving URI: parent " + parent + " child " + child + " result " + result + " resultAbsolute:" + result2); |
| } |
| |
| return result2; |
| } |
| |
| } |