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    1   /*
    2    * Copyright (c) 2005, 2011, 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.  Oracle designates this
    8    * particular file as subject to the "Classpath" exception as provided
    9    * by Oracle in the LICENSE file that accompanied this code.
   10    *
   11    * This code is distributed in the hope that it will be useful, but WITHOUT
   12    * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   13    * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   14    * version 2 for more details (a copy is included in the LICENSE file that
   15    * accompanied this code).
   16    *
   17    * You should have received a copy of the GNU General Public License version
   18    * 2 along with this work; if not, write to the Free Software Foundation,
   19    * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   20    *
   21    * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   22    * or visit www.oracle.com if you need additional information or have any
   23    * questions.
   24    */
   25   
   26   package com.sun.tools.javac.file;
   27   
   28   import java.io.IOException;
   29   import java.util.Set;
   30   import javax.tools.JavaFileObject;
   31   
   32   import java.io.ByteArrayInputStream;
   33   import java.io.File;
   34   import java.io.InputStream;
   35   import java.io.OutputStream;
   36   import java.io.Writer;
   37   import java.net.URI;
   38   import java.nio.ByteBuffer;
   39   import java.nio.CharBuffer;
   40   import java.nio.charset.CharsetDecoder;
   41   
   42   import com.sun.tools.javac.file.JavacFileManager.Archive;
   43   import com.sun.tools.javac.file.RelativePath.RelativeDirectory;
   44   import com.sun.tools.javac.file.RelativePath.RelativeFile;
   45   import com.sun.tools.javac.util.Assert;
   46   import com.sun.tools.javac.util.List;
   47   
   48   /**
   49    * <p><b>This is NOT part of any supported API.
   50    * If you write code that depends on this, you do so at your own risk.
   51    * This code and its internal interfaces are subject to change or
   52    * deletion without notice.</b>
   53    */
   54   public class ZipFileIndexArchive implements Archive {
   55   
   56       private final ZipFileIndex zfIndex;
   57       private JavacFileManager fileManager;
   58   
   59       public ZipFileIndexArchive(JavacFileManager fileManager, ZipFileIndex zdir) throws IOException {
   60           super();
   61           this.fileManager = fileManager;
   62           this.zfIndex = zdir;
   63       }
   64   
   65       public boolean contains(RelativePath name) {
   66           return zfIndex.contains(name);
   67       }
   68   
   69       public List<String> getFiles(RelativeDirectory subdirectory) {
   70           return zfIndex.getFiles(subdirectory);
   71       }
   72   
   73       public JavaFileObject getFileObject(RelativeDirectory subdirectory, String file) {
   74           RelativeFile fullZipFileName = new RelativeFile(subdirectory, file);
   75           ZipFileIndex.Entry entry = zfIndex.getZipIndexEntry(fullZipFileName);
   76           JavaFileObject ret = new ZipFileIndexFileObject(fileManager, zfIndex, entry, zfIndex.getZipFile());
   77           return ret;
   78       }
   79   
   80       public Set<RelativeDirectory> getSubdirectories() {
   81           return zfIndex.getAllDirectories();
   82       }
   83   
   84       public void close() throws IOException {
   85           zfIndex.close();
   86       }
   87   
   88       @Override
   89       public String toString() {
   90           return "ZipFileIndexArchive[" + zfIndex + "]";
   91       }
   92   
   93       /**
   94        * A subclass of JavaFileObject representing zip entries using the com.sun.tools.javac.file.ZipFileIndex implementation.
   95        */
   96       public static class ZipFileIndexFileObject extends BaseFileObject {
   97   
   98           /** The entry's name.
   99            */
  100           private String name;
  101   
  102           /** The zipfile containing the entry.
  103            */
  104           ZipFileIndex zfIndex;
  105   
  106           /** The underlying zip entry object.
  107            */
  108           ZipFileIndex.Entry entry;
  109   
  110           /** The InputStream for this zip entry (file.)
  111            */
  112           InputStream inputStream = null;
  113   
  114           /** The name of the zip file where this entry resides.
  115            */
  116           File zipName;
  117   
  118   
  119           ZipFileIndexFileObject(JavacFileManager fileManager, ZipFileIndex zfIndex, ZipFileIndex.Entry entry, File zipFileName) {
  120               super(fileManager);
  121               this.name = entry.getFileName();
  122               this.zfIndex = zfIndex;
  123               this.entry = entry;
  124               this.zipName = zipFileName;
  125           }
  126   
  127           @Override
  128           public URI toUri() {
  129               return createJarUri(zipName, getPrefixedEntryName());
  130           }
  131   
  132           @Override
  133           public String getName() {
  134               return zipName + "(" + getPrefixedEntryName() + ")";
  135           }
  136   
  137           @Override
  138           public String getShortName() {
  139               return zipName.getName() + "(" + entry.getName() + ")";
  140           }
  141   
  142           @Override
  143           public JavaFileObject.Kind getKind() {
  144               return getKind(entry.getName());
  145           }
  146   
  147           @Override
  148           public InputStream openInputStream() throws IOException {
  149               if (inputStream == null) {
  150                   Assert.checkNonNull(entry); // see constructor
  151                   inputStream = new ByteArrayInputStream(zfIndex.read(entry));
  152               }
  153               return inputStream;
  154           }
  155   
  156           @Override
  157           public OutputStream openOutputStream() throws IOException {
  158               throw new UnsupportedOperationException();
  159           }
  160   
  161           @Override
  162           public CharBuffer getCharContent(boolean ignoreEncodingErrors) throws IOException {
  163               CharBuffer cb = fileManager.getCachedContent(this);
  164               if (cb == null) {
  165                   InputStream in = new ByteArrayInputStream(zfIndex.read(entry));
  166                   try {
  167                       ByteBuffer bb = fileManager.makeByteBuffer(in);
  168                       JavaFileObject prev = fileManager.log.useSource(this);
  169                       try {
  170                           cb = fileManager.decode(bb, ignoreEncodingErrors);
  171                       } finally {
  172                           fileManager.log.useSource(prev);
  173                       }
  174                       fileManager.recycleByteBuffer(bb); // save for next time
  175                       if (!ignoreEncodingErrors)
  176                           fileManager.cache(this, cb);
  177                   } finally {
  178                       in.close();
  179                   }
  180               }
  181               return cb;
  182           }
  183   
  184           @Override
  185           public Writer openWriter() throws IOException {
  186               throw new UnsupportedOperationException();
  187           }
  188   
  189           @Override
  190           public long getLastModified() {
  191               return entry.getLastModified();
  192           }
  193   
  194           @Override
  195           public boolean delete() {
  196               throw new UnsupportedOperationException();
  197           }
  198   
  199           @Override
  200           protected CharsetDecoder getDecoder(boolean ignoreEncodingErrors) {
  201               return fileManager.getDecoder(fileManager.getEncodingName(), ignoreEncodingErrors);
  202           }
  203   
  204           @Override
  205           protected String inferBinaryName(Iterable<? extends File> path) {
  206               String entryName = entry.getName();
  207               if (zfIndex.symbolFilePrefix != null) {
  208                   String prefix = zfIndex.symbolFilePrefix.path;
  209                   if (entryName.startsWith(prefix))
  210                       entryName = entryName.substring(prefix.length());
  211               }
  212               return removeExtension(entryName).replace('/', '.');
  213           }
  214   
  215           @Override
  216           public boolean isNameCompatible(String cn, JavaFileObject.Kind k) {
  217               cn.getClass(); // null check
  218               if (k == Kind.OTHER && getKind() != k)
  219                   return false;
  220               return name.equals(cn + k.extension);
  221           }
  222   
  223           /**
  224            * Check if two file objects are equal.
  225            * Two ZipFileIndexFileObjects are equal if the absolute paths of the underlying
  226            * zip files are equal and if the paths within those zip files are equal.
  227            */
  228           @Override
  229           public boolean equals(Object other) {
  230               if (this == other)
  231                   return true;
  232   
  233               if (!(other instanceof ZipFileIndexFileObject))
  234                   return false;
  235   
  236               ZipFileIndexFileObject o = (ZipFileIndexFileObject) other;
  237               return zfIndex.getAbsoluteFile().equals(o.zfIndex.getAbsoluteFile())
  238                       && name.equals(o.name);
  239           }
  240   
  241           @Override
  242           public int hashCode() {
  243               return zfIndex.getAbsoluteFile().hashCode() + name.hashCode();
  244           }
  245   
  246           private String getPrefixedEntryName() {
  247               if (zfIndex.symbolFilePrefix != null)
  248                   return zfIndex.symbolFilePrefix.path + entry.getName();
  249               else
  250                   return entry.getName();
  251           }
  252       }
  253   
  254   }

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