| /* |
| * 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.commons.vfs2.provider.jar; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.jar.Attributes; |
| import java.util.jar.Attributes.Name; |
| import java.util.jar.JarFile; |
| import java.util.jar.Manifest; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipFile; |
| |
| import org.apache.commons.vfs2.Capability; |
| import org.apache.commons.vfs2.FileObject; |
| import org.apache.commons.vfs2.FileSystemException; |
| import org.apache.commons.vfs2.FileSystemOptions; |
| import org.apache.commons.vfs2.provider.AbstractFileName; |
| import org.apache.commons.vfs2.provider.zip.ZipFileObject; |
| import org.apache.commons.vfs2.provider.zip.ZipFileSystem; |
| |
| /** |
| * A read-only file system for Jar files. |
| */ |
| public class JarFileSystem extends ZipFileSystem |
| { |
| private Attributes attributes; |
| |
| protected JarFileSystem(final AbstractFileName rootName, |
| final FileObject file, |
| final FileSystemOptions fileSystemOptions) throws FileSystemException |
| { |
| super(rootName, file, fileSystemOptions); |
| } |
| |
| // @Override |
| // protected FileObject createFile(AbstractFileName name) throws FileSystemException |
| // { |
| // return new JarFileObject(name, null, this, false); |
| // } |
| |
| @Override |
| protected ZipFile createZipFile(final File file) throws FileSystemException |
| { |
| try |
| { |
| return new JarFile(file); |
| } |
| catch (final IOException ioe) |
| { |
| throw new FileSystemException("vfs.provider.jar/open-jar-file.error", file, ioe); |
| } |
| } |
| |
| @Override |
| protected ZipFileObject createZipFileObject(final AbstractFileName name, |
| final ZipEntry entry) throws FileSystemException |
| { |
| return new JarFileObject(name, entry, this, true); |
| } |
| |
| /** |
| * Returns the capabilities of this file system. |
| */ |
| @Override |
| protected void addCapabilities(final Collection<Capability> caps) |
| { |
| // super.addCapabilities(caps); |
| caps.addAll(JarFileProvider.capabilities); |
| } |
| |
| Attributes getAttributes() throws IOException |
| { |
| if (attributes == null) |
| { |
| final Manifest man = ((JarFile) getZipFile()).getManifest(); |
| if (man == null) |
| { |
| attributes = new Attributes(1); |
| } |
| else |
| { |
| attributes = man.getMainAttributes(); |
| if (attributes == null) |
| { |
| attributes = new Attributes(1); |
| } |
| } |
| } |
| |
| return attributes; |
| } |
| |
| Object getAttribute(final Name attrName) |
| throws FileSystemException |
| { |
| try |
| { |
| final Attributes attr = getAttributes(); |
| final String value = attr.getValue(attrName); |
| return value; |
| } |
| catch (final IOException ioe) |
| { |
| throw new FileSystemException(attrName.toString(), ioe); |
| } |
| } |
| |
| Name lookupName(final String attrName) |
| { |
| if (Name.CLASS_PATH.toString().equals(attrName)) |
| { |
| return Name.CLASS_PATH; |
| } |
| else if (Name.CONTENT_TYPE.toString().equals(attrName)) |
| { |
| return Name.CONTENT_TYPE; |
| } |
| else if (Name.EXTENSION_INSTALLATION.toString().equals(attrName)) |
| { |
| return Name.EXTENSION_INSTALLATION; |
| } |
| else if (Name.EXTENSION_LIST.toString().equals(attrName)) |
| { |
| return Name.EXTENSION_LIST; |
| } |
| else if (Name.EXTENSION_NAME.toString().equals(attrName)) |
| { |
| return Name.EXTENSION_NAME; |
| } |
| else if (Name.IMPLEMENTATION_TITLE.toString().equals(attrName)) |
| { |
| return Name.IMPLEMENTATION_TITLE; |
| } |
| else if (Name.IMPLEMENTATION_URL.toString().equals(attrName)) |
| { |
| return Name.IMPLEMENTATION_URL; |
| } |
| else if (Name.IMPLEMENTATION_VENDOR.toString().equals(attrName)) |
| { |
| return Name.IMPLEMENTATION_VENDOR; |
| } |
| else if (Name.IMPLEMENTATION_VENDOR_ID.toString().equals(attrName)) |
| { |
| return Name.IMPLEMENTATION_VENDOR_ID; |
| } |
| else if (Name.IMPLEMENTATION_VERSION.toString().equals(attrName)) |
| { |
| return Name.IMPLEMENTATION_VENDOR; |
| } |
| else if (Name.MAIN_CLASS.toString().equals(attrName)) |
| { |
| return Name.MAIN_CLASS; |
| } |
| else if (Name.MANIFEST_VERSION.toString().equals(attrName)) |
| { |
| return Name.MANIFEST_VERSION; |
| } |
| else if (Name.SEALED.toString().equals(attrName)) |
| { |
| return Name.SEALED; |
| } |
| else if (Name.SIGNATURE_VERSION.toString().equals(attrName)) |
| { |
| return Name.SIGNATURE_VERSION; |
| } |
| else if (Name.SPECIFICATION_TITLE.toString().equals(attrName)) |
| { |
| return Name.SPECIFICATION_TITLE; |
| } |
| else if (Name.SPECIFICATION_VENDOR.toString().equals(attrName)) |
| { |
| return Name.SPECIFICATION_VENDOR; |
| } |
| else if (Name.SPECIFICATION_VERSION.toString().equals(attrName)) |
| { |
| return Name.SPECIFICATION_VERSION; |
| } |
| else |
| { |
| return new Name(attrName); |
| } |
| } |
| |
| /** |
| * Retrives the attribute with the specified name. The default |
| * implementation simply throws an exception. |
| * @param attrName The attiribute's name. |
| * @return The value of the attribute. |
| * @throws FileSystemException if an error occurs. |
| */ |
| @Override |
| public Object getAttribute(final String attrName) throws FileSystemException |
| { |
| final Name name = lookupName(attrName); |
| return getAttribute(name); |
| } |
| |
| |
| @Override |
| protected ZipFile getZipFile() throws FileSystemException |
| { |
| // make accessible |
| return super.getZipFile(); |
| } |
| |
| } |