| /* |
| * 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 freemarker.cache; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.JarURLConnection; |
| import java.net.URL; |
| import java.net.URLConnection; |
| |
| /** |
| * Wraps a <code>java.net.URL</code>, and implements methods required for a typical template source. |
| */ |
| class URLTemplateSource { |
| private final URL url; |
| private URLConnection conn; |
| private InputStream inputStream; |
| private Boolean useCaches; |
| |
| /** |
| * @param useCaches {@code null} if this aspect wasn't set in the parent {@link TemplateLoader}. |
| */ |
| URLTemplateSource(URL url, Boolean useCaches) throws IOException { |
| this.url = url; |
| this.conn = url.openConnection(); |
| this.useCaches = useCaches; |
| if (useCaches != null) { |
| conn.setUseCaches(useCaches.booleanValue()); |
| } |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (o instanceof URLTemplateSource) { |
| return url.equals(((URLTemplateSource) o).url); |
| } else { |
| return false; |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| return url.hashCode(); |
| } |
| |
| @Override |
| public String toString() { |
| return url.toString(); |
| } |
| |
| long lastModified() { |
| if (conn instanceof JarURLConnection) { |
| // There is a bug in sun's jar url connection that causes file handle leaks when calling getLastModified() |
| // Since the time stamps of jar file contents can't vary independent from the jar file timestamp, just use |
| // the jar file timestamp |
| URL jarURL = ((JarURLConnection) conn).getJarFileURL(); |
| if (jarURL.getProtocol().equals("file")) { |
| // Return the last modified time of the underlying file - saves some opening and closing |
| return new File(jarURL.getFile()).lastModified(); |
| } else { |
| // Use the URL mechanism |
| URLConnection jarConn = null; |
| try { |
| jarConn = jarURL.openConnection(); |
| return jarConn.getLastModified(); |
| } catch (IOException e) { |
| return -1; |
| } finally { |
| try { |
| if (jarConn != null) jarConn.getInputStream().close(); |
| } catch (IOException e) { } |
| } |
| } |
| } else { |
| long lastModified = conn.getLastModified(); |
| if (lastModified == -1L && url.getProtocol().equals("file")) { |
| // Hack for obtaining accurate last modified time for |
| // URLs that point to the local file system. This is fixed |
| // in JDK 1.4, but prior JDKs returns -1 for file:// URLs. |
| return new File(url.getFile()).lastModified(); |
| } else { |
| return lastModified; |
| } |
| } |
| } |
| |
| InputStream getInputStream() throws IOException { |
| if (inputStream != null) { |
| // Ensure that the returned InputStream reads from the beginning of the resource when getInputStream() |
| // is called for the second time: |
| try { |
| inputStream.close(); |
| } catch (IOException e) { |
| // Ignore; this is maybe because it was closed for the 2nd time now |
| } |
| this.conn = url.openConnection(); |
| } |
| inputStream = conn.getInputStream(); |
| return inputStream; |
| } |
| |
| void close() throws IOException { |
| try { |
| if (inputStream != null) { |
| inputStream.close(); |
| } else { |
| conn.getInputStream().close(); |
| } |
| } finally { |
| inputStream = null; |
| conn = null; |
| } |
| } |
| |
| Boolean getUseCaches() { |
| return useCaches; |
| } |
| |
| void setUseCaches(boolean useCaches) { |
| if (this.conn != null) { |
| conn.setUseCaches(useCaches); |
| this.useCaches = Boolean.valueOf(useCaches); |
| } |
| } |
| |
| } |