Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright (c) 2005, 2009, Oracle and/or its affiliates. All rights reserved.

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

  *

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

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

  * published by the Free Software Foundation.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the LICENSE file that accompanied this code.

  *

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

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

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

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

  * accompanied this code).

  *

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

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

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

  *

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

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

  * questions.

  */

 package com.sun.tools.javac.file;

 import java.io.File;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.OutputStream;

 import java.io.Writer;

 import java.net.URI;

 import java.nio.ByteBuffer;

 import java.nio.CharBuffer;

 import java.nio.charset.CharsetDecoder;

 import java.util.Enumeration;

 import java.util.HashMap;

 import java.util.Map;

 import java.util.Set;

 import java.util.zip.ZipEntry;

 import java.util.zip.ZipFile;

 import javax.tools.JavaFileObject;

 import com.sun.tools.javac.file.JavacFileManager.Archive;

 import com.sun.tools.javac.file.RelativePath.RelativeDirectory;

 import com.sun.tools.javac.file.RelativePath.RelativeFile;

 import com.sun.tools.javac.util.List;

 import java.lang.ref.Reference;

 import java.lang.ref.SoftReference;

 /**

  * <p><b>This is NOT part of any supported API.

  * If you write code that depends on this, you do so at your own risk.

  * This code and its internal interfaces are subject to change or

  * deletion without notice.</b>

  */

 public class ZipArchive implements Archive {

     public ZipArchive(JavacFileManager fm, ZipFile zfile) throws IOException {

         this(fm, zfile, true);

     }

     protected ZipArchive(JavacFileManager fm, ZipFile zfile, boolean initMap) throws IOException {

         this.fileManager = fm;

         this.zfile = zfile;

         this.map = new HashMap<RelativeDirectory,List<String>>();

         if (initMap)

             initMap();

     }

     protected void initMap() throws IOException {

         for (Enumeration<? extends ZipEntry> e = zfile.entries(); e.hasMoreElements(); ) {

             ZipEntry entry;

             try {

                 entry = e.nextElement();

             } catch (InternalError ex) {

                 IOException io = new IOException();

                 io.initCause(ex); // convenience constructors added in Mustang :-(

                 throw io;

             }

             addZipEntry(entry);

         }

     }

     void addZipEntry(ZipEntry entry) {

         String name = entry.getName();

         int i = name.lastIndexOf('/');

         RelativeDirectory dirname = new RelativeDirectory(name.substring(0, i+1));

         String basename = name.substring(i+1);

         if (basename.length() == 0)

             return;

         List<String> list = map.get(dirname);

         if (list == null)

             list = List.nil();

         list = list.prepend(basename);

         map.put(dirname, list);

     }

     public boolean contains(RelativePath name) {

         RelativeDirectory dirname = name.dirname();

         String basename = name.basename();

         if (basename.length() == 0)

             return false;

         List<String> list = map.get(dirname);

         return (list != null && list.contains(basename));

     }

     public List<String> getFiles(RelativeDirectory subdirectory) {

         return map.get(subdirectory);

     }

     public JavaFileObject getFileObject(RelativeDirectory subdirectory, String file) {

         ZipEntry ze = new RelativeFile(subdirectory, file).getZipEntry(zfile);

         return new ZipFileObject(this, file, ze);

     }

     public Set<RelativeDirectory> getSubdirectories() {

         return map.keySet();

     }

     public void close() throws IOException {

         zfile.close();

     }

     @Override

     public String toString() {

         return "ZipArchive[" + zfile.getName() + "]";

     }

     private File getAbsoluteFile() {

         File absFile = (absFileRef == null ? null : absFileRef.get());

         if (absFile == null) {

             absFile = new File(zfile.getName()).getAbsoluteFile();

             absFileRef = new SoftReference<File>(absFile);

         }

         return absFile;

     }

     /**

      * The file manager that created this archive.

      */

     protected JavacFileManager fileManager;

     /**

      * The index for the contents of this archive.

      */

     protected final Map<RelativeDirectory,List<String>> map;

     /**

      * The zip file for the archive.

      */

     protected final ZipFile zfile;

     /**

      * A reference to the absolute filename for the zip file for the archive.

      */

     protected Reference<File> absFileRef;

     /**

      * A subclass of JavaFileObject representing zip entries.

      */

     public static class ZipFileObject extends BaseFileObject {

         private String name;

         ZipArchive zarch;

         ZipEntry entry;

         protected ZipFileObject(ZipArchive zarch, String name, ZipEntry entry) {

             super(zarch.fileManager);

             this.zarch = zarch;

             this.name = name;

             this.entry = entry;

         }

         public URI toUri() {

             File zipFile = new File(zarch.zfile.getName());

             return createJarUri(zipFile, entry.getName());

         }

         @Override

         public String getName() {

             return zarch.zfile.getName() + "(" + entry.getName() + ")";

         }

         @Override

         public String getShortName() {

             return new File(zarch.zfile.getName()).getName() + "(" + entry + ")";

         }

         @Override

         public JavaFileObject.Kind getKind() {

             return getKind(entry.getName());

         }

         @Override

         public InputStream openInputStream() throws IOException {

             return zarch.zfile.getInputStream(entry);

         }

         @Override

         public OutputStream openOutputStream() throws IOException {

             throw new UnsupportedOperationException();

         }

         @Override

         public CharBuffer getCharContent(boolean ignoreEncodingErrors) throws IOException {

             CharBuffer cb = fileManager.getCachedContent(this);

             if (cb == null) {

                 InputStream in = zarch.zfile.getInputStream(entry);

                 try {

                     ByteBuffer bb = fileManager.makeByteBuffer(in);

                     JavaFileObject prev = fileManager.log.useSource(this);

                     try {

                         cb = fileManager.decode(bb, ignoreEncodingErrors);

                     } finally {

                         fileManager.log.useSource(prev);

                     }

                     fileManager.recycleByteBuffer(bb);

                     if (!ignoreEncodingErrors) {

                         fileManager.cache(this, cb);

                     }

                 } finally {

                     in.close();

                 }

             }

             return cb;

         }

         @Override

         public Writer openWriter() throws IOException {

             throw new UnsupportedOperationException();

         }

         @Override

         public long getLastModified() {

             return entry.getTime();

         }

         @Override

         public boolean delete() {

             throw new UnsupportedOperationException();

         }

         @Override

         protected CharsetDecoder getDecoder(boolean ignoreEncodingErrors) {

             return fileManager.getDecoder(fileManager.getEncodingName(), ignoreEncodingErrors);

         }

         @Override

         protected String inferBinaryName(Iterable<? extends File> path) {

             String entryName = entry.getName();

             return removeExtension(entryName).replace('/', '.');

         }

         @Override

         public boolean isNameCompatible(String cn, JavaFileObject.Kind k) {

             cn.getClass();

             // null check

             if (k == Kind.OTHER && getKind() != k) {

                 return false;

             }

             return name.equals(cn + k.extension);

         }

         /**

          * Check if two file objects are equal.

          * Two ZipFileObjects are equal if the absolute paths of the underlying

          * zip files are equal and if the paths within those zip files are equal.

          */

         @Override

         public boolean equals(Object other) {

             if (this == other)

                 return true;

             if (!(other instanceof ZipFileObject))

                 return false;

             ZipFileObject o = (ZipFileObject) other;

             return zarch.getAbsoluteFile().equals(o.zarch.getAbsoluteFile())

                     && name.equals(o.name);

         }

         @Override

         public int hashCode() {

             return zarch.getAbsoluteFile().hashCode() + name.hashCode();

         }

     }

 }