| 1 | package org.apache.velocity.runtime.resource.loader; |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2001,2004 The Apache Software Foundation. |
| 5 | * |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | */ |
| 18 | |
| 19 | import java.io.InputStream; |
| 20 | import java.net.JarURLConnection; |
| 21 | import java.net.URL; |
| 22 | import java.util.Enumeration; |
| 23 | import java.util.jar.JarEntry; |
| 24 | import java.util.jar.JarFile; |
| 25 | import java.util.Hashtable; |
| 26 | |
| 27 | import org.apache.velocity.runtime.RuntimeServices; |
| 28 | |
| 29 | import org.apache.velocity.exception.ResourceNotFoundException; |
| 30 | |
| 31 | /** |
| 32 | * A small wrapper around a Jar |
| 33 | * |
| 34 | * @author <a href="mailto:daveb@miceda-data.com">Dave Bryson</a> |
| 35 | * @version $Id: JarHolder.java,v 1.8.4.1 2004/03/03 23:23:02 geirm Exp $ |
| 36 | */ |
| 37 | public class JarHolder |
| 38 | { |
| 39 | private String urlpath = null; |
| 40 | private JarFile theJar = null; |
| 41 | private JarURLConnection conn = null; |
| 42 | |
| 43 | private RuntimeServices rsvc = null; |
| 44 | |
| 45 | public JarHolder( RuntimeServices rs, String urlpath ) |
| 46 | { |
| 47 | rsvc = rs; |
| 48 | |
| 49 | this.urlpath=urlpath; |
| 50 | init(); |
| 51 | |
| 52 | rsvc.info(" JarHolder : initialized JAR: " + urlpath ); |
| 53 | } |
| 54 | |
| 55 | public void init() |
| 56 | { |
| 57 | try |
| 58 | { |
| 59 | rsvc.info(" JarHolder : attempting to connect to "+ urlpath); |
| 60 | URL url = new URL( urlpath ); |
| 61 | conn = (JarURLConnection) url.openConnection(); |
| 62 | conn.setAllowUserInteraction(false); |
| 63 | conn.setDoInput(true); |
| 64 | conn.setDoOutput(false); |
| 65 | conn.connect(); |
| 66 | theJar = conn.getJarFile(); |
| 67 | } |
| 68 | catch (Exception e) |
| 69 | { |
| 70 | rsvc.error(" JarHolder : error establishing connection to JAR "+ e); |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | public void close() |
| 75 | { |
| 76 | try |
| 77 | { |
| 78 | theJar.close(); |
| 79 | } |
| 80 | catch ( Exception e ) |
| 81 | { |
| 82 | rsvc.error(" JarHolder : error Closing JAR the file " + e); |
| 83 | } |
| 84 | theJar = null; |
| 85 | conn = null; |
| 86 | |
| 87 | rsvc.info(" JarHolder : JAR file closed"); |
| 88 | } |
| 89 | |
| 90 | public InputStream getResource( String theentry ) |
| 91 | throws ResourceNotFoundException { |
| 92 | InputStream data = null; |
| 93 | |
| 94 | try |
| 95 | { |
| 96 | JarEntry entry = theJar.getJarEntry( theentry ); |
| 97 | |
| 98 | if ( entry != null ) |
| 99 | { |
| 100 | data = theJar.getInputStream( entry ); |
| 101 | } |
| 102 | } |
| 103 | catch( Exception fnfe ) |
| 104 | { |
| 105 | rsvc.error(" JarHolder : getResource() error : exception : " + fnfe ); |
| 106 | throw new ResourceNotFoundException( fnfe.getMessage() ); |
| 107 | } |
| 108 | |
| 109 | return data; |
| 110 | } |
| 111 | |
| 112 | public Hashtable getEntries() |
| 113 | { |
| 114 | Hashtable allEntries = new Hashtable(559); |
| 115 | |
| 116 | Enumeration all = theJar.entries(); |
| 117 | while ( all.hasMoreElements() ) |
| 118 | { |
| 119 | JarEntry je = (JarEntry)all.nextElement(); |
| 120 | |
| 121 | // We don't map plain directory entries |
| 122 | if ( !je.isDirectory() ) |
| 123 | { |
| 124 | allEntries.put( je.getName(), this.urlpath ); |
| 125 | } |
| 126 | } |
| 127 | return allEntries; |
| 128 | } |
| 129 | |
| 130 | public String getUrlPath() |
| 131 | { |
| 132 | return urlpath; |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | |
| 137 | |
| 138 | |
| 139 | |
| 140 | |
| 141 | |