blob: 3acc60e1db25cc54acba7bbabf0a5f73798383f0 [file] [log] [blame]
/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed 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 com.android.zipflinger;
import com.android.annotations.NonNull;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.zip.Deflater;
public class BytesSource extends Source {
// Bytes to be written in the zip, after the Local File Header.
private ByteBuffer zipEntryPayload;
protected BytesSource(String name) {
super(name);
}
/**
* @param bytes
* @param name
* @param compressionLevel One of java.util.zip.Deflater compression level.
*/
public BytesSource(@NonNull byte[] bytes, @NonNull String name, int compressionLevel)
throws IOException {
super(name);
build(bytes, bytes.length, compressionLevel);
}
public BytesSource(@NonNull Path file, @NonNull String name, int compressionLevel)
throws IOException {
super(name);
byte[] bytes = Files.readAllBytes(file);
build(bytes, bytes.length, compressionLevel);
}
/** @deprecated Use {@link #BytesSource(Path, String, int)} instead. */
@Deprecated
public BytesSource(@NonNull File file, @NonNull String name, int compressionLevel)
throws IOException {
this(file.toPath(), name, compressionLevel);
}
/**
* @param stream BytesSource takes ownership of the InputStream and will close it after draining
* it.
* @param name
* @param compressionLevel
* @throws IOException
*/
public BytesSource(@NonNull InputStream stream, @NonNull String name, int compressionLevel)
throws IOException {
super(name);
try (NoCopyByteArrayOutputStream ncbos = new NoCopyByteArrayOutputStream(16000)) {
byte[] tmpBuffer = new byte[16000];
int bytesRead;
while ((bytesRead = stream.read(tmpBuffer)) != -1) {
ncbos.write(tmpBuffer, 0, bytesRead);
}
stream.close();
build(ncbos.buf(), ncbos.getCount(), compressionLevel);
}
}
protected void build(byte[] bytes, int size, int compressionLevel) throws IOException {
crc = Crc32.crc32(bytes, 0, size);
uncompressedSize = size;
if (compressionLevel == Deflater.NO_COMPRESSION) {
zipEntryPayload = ByteBuffer.wrap(bytes, 0, size);
compressedSize = uncompressedSize;
compressionFlag = LocalFileHeader.COMPRESSION_NONE;
} else {
zipEntryPayload = Compressor.deflate(bytes, 0, size, compressionLevel);
compressedSize = zipEntryPayload.limit();
compressionFlag = LocalFileHeader.COMPRESSION_DEFLATE;
}
}
@Override
public void prepare() {}
@Override
public long writeTo(@NonNull ZipWriter writer) throws IOException {
return writer.write(zipEntryPayload);
}
}