1 /*

     2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 package jdk.tools.jaotc.collect.jar;

    24 

    25 import jdk.tools.jaotc.collect.ClassSource;

    26 import jdk.tools.jaotc.collect.FileSupport;

    27 import jdk.tools.jaotc.collect.SearchPath;

    28 import jdk.tools.jaotc.collect.SourceProvider;

    29 

    30 import java.net.MalformedURLException;

    31 import java.nio.file.FileSystem;

    32 import java.nio.file.FileSystems;

    33 import java.nio.file.Path;

    34 import java.nio.file.ProviderNotFoundException;

    35 

    36 public class JarSourceProvider implements SourceProvider {

    37     private final FileSystem fileSystem;

    38     private final FileSupport fileSupport;

    39     public final static String TYPE = "jar";

    40 

    41     public JarSourceProvider() {

    42         this(new FileSupport());

    43     }

    44 

    45     public JarSourceProvider(FileSupport fileSupport) {

    46         this.fileSupport = fileSupport;

    47         fileSystem = FileSystems.getDefault();

    48     }

    49 

    50     @Override

    51     public ClassSource findSource(String name, SearchPath searchPath) {

    52         Path fileName = fileSystem.getPath(name);

    53         Path jarFile = searchPath.find(fileSystem, fileName);

    54 

    55         if (!validPath(jarFile)) {

    56             return null;

    57         }

    58 

    59         return createSource(jarFile);

    60     }

    61 

    62     private ClassSource createSource(Path jarFile) {

    63         try {

    64             Path jarRootPath = fileSupport.getJarFileSystemRoot(jarFile);

    65             if (jarRootPath == null) {

    66                 return null;

    67             }

    68             ClassLoader classLoader = fileSupport.createClassLoader(jarFile);

    69             return new JarFileSource(jarFile, jarRootPath, classLoader);

    70         } catch (ProviderNotFoundException | MalformedURLException e) {

    71         }

    72         return null;

    73     }

    74 

    75     @Override

    76     public boolean supports(String type) {

    77         return TYPE.equals(type);

    78     }

    79 

    80     private boolean validPath(Path jarFile) {

    81         return jarFile != null && !fileSupport.isDirectory(jarFile);

    82     }

    83 }