The Tor Browser: mobile/android/base/mozglue/NativeZip.java@fc2d59ddac77

     1 /* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-

     2  * This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 package org.mozilla.gecko.mozglue;

     8 import org.mozilla.gecko.mozglue.generatorannotations.WrapElementForJNI;

    10 import java.io.InputStream;

    11 import java.nio.ByteBuffer;

    12 import java.util.zip.Inflater;

    13 import java.util.zip.InflaterInputStream;

    15 public class NativeZip implements NativeReference {

    16     private static final int DEFLATE = 8;

    17     private static final int STORE = 0;

    19     private volatile long mObj;

    20     private InputStream mInput;

    22     public NativeZip(String path) {

    23         mObj = getZip(path);

    24         mInput = null;

    25     }

    27     public NativeZip(InputStream input) {

    28         if (!(input instanceof ByteBufferInputStream)) {

    29             throw new IllegalArgumentException("Got " + input.getClass()

    30                                                + ", but expected ByteBufferInputStream!");

    31         }

    32         ByteBufferInputStream bbinput = (ByteBufferInputStream)input;

    33         mObj = getZipFromByteBuffer(bbinput.mBuf);

    34         mInput = input;

    35     }

    37     @Override

    38     public void finalize() {

    39         release();

    40     }

    42     public void close() {

    43         release();

    44     }

    46     @Override

    47     public void release() {

    48         if (mObj != 0) {

    49             _release(mObj);

    50             mObj = 0;

    51         }

    52         mInput = null;

    53     }

    55     @Override

    56     public boolean isReleased() {

    57         return (mObj == 0);

    58     }

    60     public InputStream getInputStream(String path) {

    61         if (isReleased()) {

    62             throw new IllegalStateException("Can't get path \"" + path

    63                                             + "\" because NativeZip is closed!");

    64         }

    65         return _getInputStream(mObj, path);

    66     }

    68     private static native long getZip(String path);

    69     private static native long getZipFromByteBuffer(ByteBuffer buffer);

    70     private static native void _release(long obj);

    71     private native InputStream _getInputStream(long obj, String path);

    73     @WrapElementForJNI

    74     private InputStream createInputStream(ByteBuffer buffer, int compression) {

    75         if (compression != STORE && compression != DEFLATE) {

    76             throw new IllegalArgumentException("Unexpected compression: " + compression);

    77         }

    79         InputStream input = new ByteBufferInputStream(buffer, this);

    80         if (compression == DEFLATE) {

    81             Inflater inflater = new Inflater(true);

    82             input = new InflaterInputStream(input, inflater);

    83         }

    85         return input;

    86     }

    87 }

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