/*
* Copyright (c) 2007, 2012, 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.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.lang.ref.Reference;
import java.lang.ref.SoftReference;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.zip.DataFormatException;
import java.util.zip.Inflater;
import java.util.zip.ZipException;
import com.sun.tools.javac.file.RelativePath.RelativeDirectory;
import com.sun.tools.javac.file.RelativePath.RelativeFile;
/**
* This class implements the building of index of a zip archive and access to
* its context. It also uses a prebuilt index if available.
* It supports invocations where it will serialize an optimized zip index file
* to disk.
*
* In order to use a secondary index file, set "usezipindex" in the Options
* object when JavacFileManager is invoked. (You can pass "-XDusezipindex" on
* the command line.)
*
* Location where to look for/generate optimized zip index files can be
* provided using "{@code -XDcachezipindexdir=<directory>}". If this flag is not
* provided, the default location is the value of the "java.io.tmpdir" system
* property.
*
* If "-XDwritezipindexfiles" is specified, there will be new optimized index
* file created for each archive, used by the compiler for compilation, at the
* location specified by the "cachezipindexdir" option.
*
* If system property nonBatchMode option is specified the compiler will use
* timestamp checking to reindex the zip files if it is needed. In batch mode
* the timestamps are not checked and the compiler uses the cached indexes.
*
* <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 ZipFileIndex {
private static final String MIN_CHAR = String.valueOf(Character.MIN_VALUE);
private static final String MAX_CHAR = String.valueOf(Character.MAX_VALUE);
public final static long NOT_MODIFIED = Long.MIN_VALUE;
private static final boolean NON_BATCH_MODE = System.getProperty("nonBatchMode") != null;// TODO: Use -XD compiler switch for this.
private Map<RelativeDirectory, DirectoryEntry> directories =
Collections.<RelativeDirectory, DirectoryEntry>emptyMap();
private Set<RelativeDirectory> allDirs =
Collections.<RelativeDirectory>emptySet();
// ZipFileIndex data entries
final File zipFile;
private Reference<File> absFileRef;
long zipFileLastModified = NOT_MODIFIED;
private RandomAccessFile zipRandomFile;
private Entry[] entries;
private boolean readFromIndex = false;
private File zipIndexFile = null;
private boolean triedToReadIndex = false;
final RelativeDirectory symbolFilePrefix;
private final int symbolFilePrefixLength;
private boolean hasPopulatedData = false;
long lastReferenceTimeStamp = NOT_MODIFIED;
private final boolean usePreindexedCache;
private final String preindexedCacheLocation;
private boolean writeIndex = false;
private Map<String, SoftReference<RelativeDirectory>> relativeDirectoryCache =
new HashMap<String, SoftReference<RelativeDirectory>>();
public synchronized boolean isOpen() {
return (zipRandomFile != null);
}
ZipFileIndex(File zipFile, RelativeDirectory symbolFilePrefix, boolean writeIndex,
boolean useCache, String cacheLocation) throws IOException {
this.zipFile = zipFile;
this.symbolFilePrefix = symbolFilePrefix;
this.symbolFilePrefixLength = (symbolFilePrefix == null ? 0 :
symbolFilePrefix.getPath().getBytes("UTF-8").length);
this.writeIndex = writeIndex;
this.usePreindexedCache = useCache;
this.preindexedCacheLocation = cacheLocation;
if (zipFile != null) {
this.zipFileLastModified = zipFile.lastModified();
}
// Validate integrity of the zip file
checkIndex();
}
@Override
public String toString() {
return "ZipFileIndex[" + zipFile + "]";
}
// Just in case...
@Override
protected void finalize() throws Throwable {
closeFile();
super.finalize();
}
private boolean isUpToDate() {
if (zipFile != null
&& ((!NON_BATCH_MODE) || zipFileLastModified == zipFile.lastModified())
&& hasPopulatedData) {
return true;
}
return false;
}
/**
* Here we need to make sure that the ZipFileIndex is valid. Check the timestamp of the file and
* if its the same as the one at the time the index was build we don't need to reopen anything.
*/
private void checkIndex() throws IOException {
boolean isUpToDate = true;
if (!isUpToDate()) {
closeFile();
isUpToDate = false;
}
if (zipRandomFile != null || isUpToDate) {
lastReferenceTimeStamp = System.currentTimeMillis();
return;
}
hasPopulatedData = true;
if (readIndex()) {
lastReferenceTimeStamp = System.currentTimeMillis();
return;
}
directories = Collections.<RelativeDirectory, DirectoryEntry>emptyMap();
allDirs = Collections.<RelativeDirectory>emptySet();
try {
openFile();
long totalLength = zipRandomFile.length();
ZipDirectory directory = new ZipDirectory(zipRandomFile, 0L, totalLength, this);
directory.buildIndex();
} finally {
if (zipRandomFile != null) {
closeFile();
}
}
lastReferenceTimeStamp = System.currentTimeMillis();
}
private void openFile() throws FileNotFoundException {
if (zipRandomFile == null && zipFile != null) {
zipRandomFile = new RandomAccessFile(zipFile, "r");
}
}
private void cleanupState() {
// Make sure there is a valid but empty index if the file doesn't exist
entries = Entry.EMPTY_ARRAY;
directories = Collections.<RelativeDirectory, DirectoryEntry>emptyMap();
zipFileLastModified = NOT_MODIFIED;
allDirs = Collections.<RelativeDirectory>emptySet();
}
public synchronized void close() {
writeIndex();
closeFile();
}
private void closeFile() {
if (zipRandomFile != null) {
try {
zipRandomFile.close();
} catch (IOException ex) {
}
zipRandomFile = null;
}
}
/**
* Returns the ZipFileIndexEntry for a path, if there is one.
*/
synchronized Entry getZipIndexEntry(RelativePath path) {
try {
checkIndex();
DirectoryEntry de = directories.get(path.dirname());
String lookFor = path.basename();
return (de == null) ? null : de.getEntry(lookFor);
}
catch (IOException e) {
return null;
}
}
/**
* Returns a javac List of filenames within a directory in the ZipFileIndex.
*/
public synchronized com.sun.tools.javac.util.List<String> getFiles(RelativeDirectory path) {
try {
checkIndex();
DirectoryEntry de = directories.get(path);
com.sun.tools.javac.util.List<String> ret = de == null ? null : de.getFiles();
if (ret == null) {
return com.sun.tools.javac.util.List.<String>nil();
}
return ret;
}
catch (IOException e) {
return com.sun.tools.javac.util.List.<String>nil();
}
}
public synchronized List<String> getDirectories(RelativeDirectory path) {
try {
checkIndex();
DirectoryEntry de = directories.get(path);
com.sun.tools.javac.util.List<String> ret = de == null ? null : de.getDirectories();
if (ret == null) {
return com.sun.tools.javac.util.List.<String>nil();
}
return ret;
}
catch (IOException e) {
return com.sun.tools.javac.util.List.<String>nil();
}
}
public synchronized Set<RelativeDirectory> getAllDirectories() {
try {
checkIndex();
if (allDirs == Collections.EMPTY_SET) {
allDirs = new java.util.LinkedHashSet<RelativeDirectory>(directories.keySet());
}
return allDirs;
}
catch (IOException e) {
return Collections.<RelativeDirectory>emptySet();
}
}
/**
* Tests if a specific path exists in the zip. This method will return true
* for file entries and directories.
*
* @param path A path within the zip.
* @return True if the path is a file or dir, false otherwise.
*/
public synchronized boolean contains(RelativePath path) {
try {
checkIndex();
return getZipIndexEntry(path) != null;
}
catch (IOException e) {
return false;
}
}
public synchronized boolean isDirectory(RelativePath path) throws IOException {
// The top level in a zip file is always a directory.
if (path.getPath().length() == 0) {
lastReferenceTimeStamp = System.currentTimeMillis();
return true;
}
checkIndex();
return directories.get(path) != null;
}
public synchronized long getLastModified(RelativeFile path) throws IOException {
Entry entry = getZipIndexEntry(path);
if (entry == null)
throw new FileNotFoundException();
return entry.getLastModified();
}
public synchronized int length(RelativeFile path) throws IOException {
Entry entry = getZipIndexEntry(path);
if (entry == null)
throw new FileNotFoundException();
if (entry.isDir) {
return 0;
}
byte[] header = getHeader(entry);
// entry is not compressed?
if (get2ByteLittleEndian(header, 8) == 0) {
return entry.compressedSize;
} else {
return entry.size;
}
}
public synchronized byte[] read(RelativeFile path) throws IOException {
Entry entry = getZipIndexEntry(path);
if (entry == null)
throw new FileNotFoundException("Path not found in ZIP: " + path.path);
return read(entry);
}
synchronized byte[] read(Entry entry) throws IOException {
openFile();
byte[] result = readBytes(entry);
closeFile();
return result;
}
public synchronized int read(RelativeFile path, byte[] buffer) throws IOException {
Entry entry = getZipIndexEntry(path);
if (entry == null)
throw new FileNotFoundException();
return read(entry, buffer);
}
synchronized int read(Entry entry, byte[] buffer)
throws IOException {
int result = readBytes(entry, buffer);
return result;
}
private byte[] readBytes(Entry entry) throws IOException {
byte[] header = getHeader(entry);
int csize = entry.compressedSize;
byte[] cbuf = new byte[csize];
zipRandomFile.skipBytes(get2ByteLittleEndian(header, 26) + get2ByteLittleEndian(header, 28));
zipRandomFile.readFully(cbuf, 0, csize);
// is this compressed - offset 8 in the ZipEntry header
if (get2ByteLittleEndian(header, 8) == 0)
return cbuf;
int size = entry.size;
byte[] buf = new byte[size];
if (inflate(cbuf, buf) != size)
throw new ZipException("corrupted zip file");
return buf;
}
/**
*
*/
private int readBytes(Entry entry, byte[] buffer) throws IOException {
byte[] header = getHeader(entry);
// entry is not compressed?
if (get2ByteLittleEndian(header, 8) == 0) {
zipRandomFile.skipBytes(get2ByteLittleEndian(header, 26) + get2ByteLittleEndian(header, 28));
int offset = 0;
int size = buffer.length;
while (offset < size) {
int count = zipRandomFile.read(buffer, offset, size - offset);
if (count == -1)
break;
offset += count;
}
return entry.size;
}
int csize = entry.compressedSize;
byte[] cbuf = new byte[csize];
zipRandomFile.skipBytes(get2ByteLittleEndian(header, 26) + get2ByteLittleEndian(header, 28));
zipRandomFile.readFully(cbuf, 0, csize);
int count = inflate(cbuf, buffer);
if (count == -1)
throw new ZipException("corrupted zip file");
return entry.size;
}
//----------------------------------------------------------------------------
// Zip utilities
//----------------------------------------------------------------------------
private byte[] getHeader(Entry entry) throws IOException {
zipRandomFile.seek(entry.offset);
byte[] header = new byte[30];
zipRandomFile.readFully(header);
if (get4ByteLittleEndian(header, 0) != 0x04034b50)
throw new ZipException("corrupted zip file");
if ((get2ByteLittleEndian(header, 6) & 1) != 0)
throw new ZipException("encrypted zip file"); // offset 6 in the header of the ZipFileEntry
return header;
}
/*
* Inflate using the java.util.zip.Inflater class
*/
private SoftReference<Inflater> inflaterRef;
private int inflate(byte[] src, byte[] dest) {
Inflater inflater = (inflaterRef == null ? null : inflaterRef.get());
// construct the inflater object or reuse an existing one
if (inflater == null)
inflaterRef = new SoftReference<Inflater>(inflater = new Inflater(true));
inflater.reset();
inflater.setInput(src);
try {
return inflater.inflate(dest);
} catch (DataFormatException ex) {
return -1;
}
}
/**
* return the two bytes buf[pos], buf[pos+1] as an unsigned integer in little
* endian format.
*/
private static int get2ByteLittleEndian(byte[] buf, int pos) {
return (buf[pos] & 0xFF) + ((buf[pos+1] & 0xFF) << 8);
}
/**
* return the 4 bytes buf[i..i+3] as an integer in little endian format.
*/
private static int get4ByteLittleEndian(byte[] buf, int pos) {
return (buf[pos] & 0xFF) + ((buf[pos + 1] & 0xFF) << 8) +
((buf[pos + 2] & 0xFF) << 16) + ((buf[pos + 3] & 0xFF) << 24);
}
/* ----------------------------------------------------------------------------
* ZipDirectory
* ----------------------------------------------------------------------------*/
private class ZipDirectory {
private RelativeDirectory lastDir;
private int lastStart;
private int lastLen;
byte[] zipDir;
RandomAccessFile zipRandomFile = null;
ZipFileIndex zipFileIndex = null;
public ZipDirectory(RandomAccessFile zipRandomFile, long start, long end, ZipFileIndex index) throws IOException {
this.zipRandomFile = zipRandomFile;
this.zipFileIndex = index;
hasValidHeader();
findCENRecord(start, end);
}
/*
* the zip entry signature should be at offset 0, otherwise allow the
* calling logic to take evasive action by throwing ZipFormatException.
*/
private boolean hasValidHeader() throws IOException {
final long pos = zipRandomFile.getFilePointer();
try {
if (zipRandomFile.read() == 'P') {
if (zipRandomFile.read() == 'K') {
if (zipRandomFile.read() == 0x03) {
if (zipRandomFile.read() == 0x04) {
return true;
}
}
}
}
} finally {
zipRandomFile.seek(pos);
}
throw new ZipFormatException("invalid zip magic");
}
/*
* Reads zip file central directory.
* For more details see readCEN in zip_util.c from the JDK sources.
* This is a Java port of that function.
*/
private void findCENRecord(long start, long end) throws IOException {
long totalLength = end - start;
int endbuflen = 1024;
byte[] endbuf = new byte[endbuflen];
long endbufend = end - start;
// There is a variable-length field after the dir offset record. We need to do consequential search.
while (endbufend >= 22) {
if (endbufend < endbuflen)
endbuflen = (int)endbufend;
long endbufpos = endbufend - endbuflen;
zipRandomFile.seek(start + endbufpos);
zipRandomFile.readFully(endbuf, 0, endbuflen);
int i = endbuflen - 22;
while (i >= 0 &&
!(endbuf[i] == 0x50 &&
endbuf[i + 1] == 0x4b &&
endbuf[i + 2] == 0x05 &&
endbuf[i + 3] == 0x06 &&
endbufpos + i + 22 +
get2ByteLittleEndian(endbuf, i + 20) == totalLength)) {
i--;
}
if (i >= 0) {
zipDir = new byte[get4ByteLittleEndian(endbuf, i + 12)];
int sz = get4ByteLittleEndian(endbuf, i + 16);
// a negative offset or the entries field indicates a
// potential zip64 archive
if (sz < 0 || get2ByteLittleEndian(endbuf, i + 10) == 0xffff) {
throw new ZipFormatException("detected a zip64 archive");
}
zipRandomFile.seek(start + sz);
zipRandomFile.readFully(zipDir, 0, zipDir.length);
return;
} else {
endbufend = endbufpos + 21;
}
}
throw new ZipException("cannot read zip file");
}
private void buildIndex() throws IOException {
int len = zipDir.length;
// Add each of the files
if (len > 0) {
directories = new LinkedHashMap<RelativeDirectory, DirectoryEntry>();
ArrayList<Entry> entryList = new ArrayList<Entry>();
for (int pos = 0; pos < len; ) {
pos = readEntry(pos, entryList, directories);
}
// Add the accumulated dirs into the same list
for (RelativeDirectory d: directories.keySet()) {
// use shared RelativeDirectory objects for parent dirs
RelativeDirectory parent = getRelativeDirectory(d.dirname().getPath());
String file = d.basename();
Entry zipFileIndexEntry = new Entry(parent, file);
zipFileIndexEntry.isDir = true;
entryList.add(zipFileIndexEntry);
}
entries = entryList.toArray(new Entry[entryList.size()]);
Arrays.sort(entries);
} else {
cleanupState();
}
}
private int readEntry(int pos, List<Entry> entryList,
Map<RelativeDirectory, DirectoryEntry> directories) throws IOException {
if (get4ByteLittleEndian(zipDir, pos) != 0x02014b50) {
throw new ZipException("cannot read zip file entry");
}
int dirStart = pos + 46;
int fileStart = dirStart;
int fileEnd = fileStart + get2ByteLittleEndian(zipDir, pos + 28);
if (zipFileIndex.symbolFilePrefixLength != 0 &&
((fileEnd - fileStart) >= symbolFilePrefixLength)) {
dirStart += zipFileIndex.symbolFilePrefixLength;
fileStart += zipFileIndex.symbolFilePrefixLength;
}
// Force any '\' to '/'. Keep the position of the last separator.
for (int index = fileStart; index < fileEnd; index++) {
byte nextByte = zipDir[index];
if (nextByte == (byte)'\\') {
zipDir[index] = (byte)'/';
fileStart = index + 1;
} else if (nextByte == (byte)'/') {
fileStart = index + 1;
}
}
RelativeDirectory directory = null;
if (fileStart == dirStart)
directory = getRelativeDirectory("");
else if (lastDir != null && lastLen == fileStart - dirStart - 1) {
int index = lastLen - 1;
while (zipDir[lastStart + index] == zipDir[dirStart + index]) {
if (index == 0) {
directory = lastDir;
break;
}
index--;
}
}
// Sub directories
if (directory == null) {
lastStart = dirStart;
lastLen = fileStart - dirStart - 1;
directory = getRelativeDirectory(new String(zipDir, dirStart, lastLen, "UTF-8"));
lastDir = directory;
// Enter also all the parent directories
RelativeDirectory tempDirectory = directory;
while (directories.get(tempDirectory) == null) {
directories.put(tempDirectory, new DirectoryEntry(tempDirectory, zipFileIndex));
if (tempDirectory.path.indexOf("/") == tempDirectory.path.length() - 1)
break;
else {
// use shared RelativeDirectory objects for parent dirs
tempDirectory = getRelativeDirectory(tempDirectory.dirname().getPath());
}
}
}
else {
if (directories.get(directory) == null) {
directories.put(directory, new DirectoryEntry(directory, zipFileIndex));
}
}
// For each dir create also a file
if (fileStart != fileEnd) {
Entry entry = new Entry(directory,
new String(zipDir, fileStart, fileEnd - fileStart, "UTF-8"));
entry.setNativeTime(get4ByteLittleEndian(zipDir, pos + 12));
entry.compressedSize = get4ByteLittleEndian(zipDir, pos + 20);
entry.size = get4ByteLittleEndian(zipDir, pos + 24);
entry.offset = get4ByteLittleEndian(zipDir, pos + 42);
entryList.add(entry);
}
return pos + 46 +
get2ByteLittleEndian(zipDir, pos + 28) +
get2ByteLittleEndian(zipDir, pos + 30) +
get2ByteLittleEndian(zipDir, pos + 32);
}
}
/**
* Returns the last modified timestamp of a zip file.
* @return long
*/
public long getZipFileLastModified() throws IOException {
synchronized (this) {
checkIndex();
return zipFileLastModified;
}
}
/** ------------------------------------------------------------------------
* DirectoryEntry class
* -------------------------------------------------------------------------*/
static class DirectoryEntry {
private boolean filesInited;
private boolean directoriesInited;
private boolean zipFileEntriesInited;
private boolean entriesInited;
private long writtenOffsetOffset = 0;
private RelativeDirectory dirName;
private com.sun.tools.javac.util.List<String> zipFileEntriesFiles = com.sun.tools.javac.util.List.<String>nil();
private com.sun.tools.javac.util.List<String> zipFileEntriesDirectories = com.sun.tools.javac.util.List.<String>nil();
private com.sun.tools.javac.util.List<Entry> zipFileEntries = com.sun.tools.javac.util.List.<Entry>nil();
private List<Entry> entries = new ArrayList<Entry>();
private ZipFileIndex zipFileIndex;
private int numEntries;
DirectoryEntry(RelativeDirectory dirName, ZipFileIndex index) {
filesInited = false;
directoriesInited = false;
entriesInited = false;
this.dirName = dirName;
this.zipFileIndex = index;
}
private com.sun.tools.javac.util.List<String> getFiles() {
if (!filesInited) {
initEntries();
for (Entry e : entries) {
if (!e.isDir) {
zipFileEntriesFiles = zipFileEntriesFiles.append(e.name);
}
}
filesInited = true;
}
return zipFileEntriesFiles;
}
private com.sun.tools.javac.util.List<String> getDirectories() {
if (!directoriesInited) {
initEntries();
for (Entry e : entries) {
if (e.isDir) {
zipFileEntriesDirectories = zipFileEntriesDirectories.append(e.name);
}
}
directoriesInited = true;
}
return zipFileEntriesDirectories;
}
private com.sun.tools.javac.util.List<Entry> getEntries() {
if (!zipFileEntriesInited) {
initEntries();
zipFileEntries = com.sun.tools.javac.util.List.nil();
for (Entry zfie : entries) {
zipFileEntries = zipFileEntries.append(zfie);
}
zipFileEntriesInited = true;
}
return zipFileEntries;
}
private Entry getEntry(String rootName) {
initEntries();
int index = Collections.binarySearch(entries, new Entry(dirName, rootName));
if (index < 0) {
return null;
}
return entries.get(index);
}
private void initEntries() {
if (entriesInited) {
return;
}
if (!zipFileIndex.readFromIndex) {
int from = -Arrays.binarySearch(zipFileIndex.entries,
new Entry(dirName, ZipFileIndex.MIN_CHAR)) - 1;
int to = -Arrays.binarySearch(zipFileIndex.entries,
new Entry(dirName, MAX_CHAR)) - 1;
for (int i = from; i < to; i++) {
entries.add(zipFileIndex.entries[i]);
}
} else {
File indexFile = zipFileIndex.getIndexFile();
if (indexFile != null) {
RandomAccessFile raf = null;
try {
raf = new RandomAccessFile(indexFile, "r");
raf.seek(writtenOffsetOffset);
for (int nFiles = 0; nFiles < numEntries; nFiles++) {
// Read the name bytes
int zfieNameBytesLen = raf.readInt();
byte [] zfieNameBytes = new byte[zfieNameBytesLen];
raf.read(zfieNameBytes);
String eName = new String(zfieNameBytes, "UTF-8");
// Read isDir
boolean eIsDir = raf.readByte() == (byte)0 ? false : true;
// Read offset of bytes in the real Jar/Zip file
int eOffset = raf.readInt();
// Read size of the file in the real Jar/Zip file
int eSize = raf.readInt();
// Read compressed size of the file in the real Jar/Zip file
int eCsize = raf.readInt();
// Read java time stamp of the file in the real Jar/Zip file
long eJavaTimestamp = raf.readLong();
Entry rfie = new Entry(dirName, eName);
rfie.isDir = eIsDir;
rfie.offset = eOffset;
rfie.size = eSize;
rfie.compressedSize = eCsize;
rfie.javatime = eJavaTimestamp;
entries.add(rfie);
}
} catch (Throwable t) {
// Do nothing
} finally {
try {
if (raf != null) {
raf.close();
}
} catch (Throwable t) {
// Do nothing
}
}
}
}
entriesInited = true;
}
List<Entry> getEntriesAsCollection() {
initEntries();
return entries;
}
}
private boolean readIndex() {
if (triedToReadIndex || !usePreindexedCache) {
return false;
}
boolean ret = false;
synchronized (this) {
triedToReadIndex = true;
RandomAccessFile raf = null;
try {
File indexFileName = getIndexFile();
raf = new RandomAccessFile(indexFileName, "r");
long fileStamp = raf.readLong();
if (zipFile.lastModified() != fileStamp) {
ret = false;
} else {
directories = new LinkedHashMap<RelativeDirectory, DirectoryEntry>();
int numDirs = raf.readInt();
for (int nDirs = 0; nDirs < numDirs; nDirs++) {
int dirNameBytesLen = raf.readInt();
byte [] dirNameBytes = new byte[dirNameBytesLen];
raf.read(dirNameBytes);
RelativeDirectory dirNameStr = getRelativeDirectory(new String(dirNameBytes, "UTF-8"));
DirectoryEntry de = new DirectoryEntry(dirNameStr, this);
de.numEntries = raf.readInt();
de.writtenOffsetOffset = raf.readLong();
directories.put(dirNameStr, de);
}
ret = true;
zipFileLastModified = fileStamp;
}
} catch (Throwable t) {
// Do nothing
} finally {
if (raf != null) {
try {
raf.close();
} catch (Throwable tt) {
// Do nothing
}
}
}
if (ret == true) {
readFromIndex = true;
}
}
return ret;
}
private boolean writeIndex() {
boolean ret = false;
if (readFromIndex || !usePreindexedCache) {
return true;
}
if (!writeIndex) {
return true;
}
File indexFile = getIndexFile();
if (indexFile == null) {
return false;
}
RandomAccessFile raf = null;
long writtenSoFar = 0;
try {
raf = new RandomAccessFile(indexFile, "rw");
raf.writeLong(zipFileLastModified);
writtenSoFar += 8;
List<DirectoryEntry> directoriesToWrite = new ArrayList<DirectoryEntry>();
Map<RelativeDirectory, Long> offsets = new HashMap<RelativeDirectory, Long>();
raf.writeInt(directories.keySet().size());
writtenSoFar += 4;
for (RelativeDirectory dirName: directories.keySet()) {
DirectoryEntry dirEntry = directories.get(dirName);
directoriesToWrite.add(dirEntry);
// Write the dir name bytes
byte [] dirNameBytes = dirName.getPath().getBytes("UTF-8");
int dirNameBytesLen = dirNameBytes.length;
raf.writeInt(dirNameBytesLen);
writtenSoFar += 4;
raf.write(dirNameBytes);
writtenSoFar += dirNameBytesLen;
// Write the number of files in the dir
List<Entry> dirEntries = dirEntry.getEntriesAsCollection();
raf.writeInt(dirEntries.size());
writtenSoFar += 4;
offsets.put(dirName, new Long(writtenSoFar));
// Write the offset of the file's data in the dir
dirEntry.writtenOffsetOffset = 0L;
raf.writeLong(0L);
writtenSoFar += 8;
}
for (DirectoryEntry de : directoriesToWrite) {
// Fix up the offset in the directory table
long currFP = raf.getFilePointer();
long offsetOffset = offsets.get(de.dirName).longValue();
raf.seek(offsetOffset);
raf.writeLong(writtenSoFar);
raf.seek(currFP);
// Now write each of the files in the DirectoryEntry
List<Entry> list = de.getEntriesAsCollection();
for (Entry zfie : list) {
// Write the name bytes
byte [] zfieNameBytes = zfie.name.getBytes("UTF-8");
int zfieNameBytesLen = zfieNameBytes.length;
raf.writeInt(zfieNameBytesLen);
writtenSoFar += 4;
raf.write(zfieNameBytes);
writtenSoFar += zfieNameBytesLen;
// Write isDir
raf.writeByte(zfie.isDir ? (byte)1 : (byte)0);
writtenSoFar += 1;
// Write offset of bytes in the real Jar/Zip file
raf.writeInt(zfie.offset);
writtenSoFar += 4;
// Write size of the file in the real Jar/Zip file
raf.writeInt(zfie.size);
writtenSoFar += 4;
// Write compressed size of the file in the real Jar/Zip file
raf.writeInt(zfie.compressedSize);
writtenSoFar += 4;
// Write java time stamp of the file in the real Jar/Zip file
raf.writeLong(zfie.getLastModified());
writtenSoFar += 8;
}
}
} catch (Throwable t) {
// Do nothing
} finally {
try {
if (raf != null) {
raf.close();
}
} catch(IOException ioe) {
// Do nothing
}
}
return ret;
}
public boolean writeZipIndex() {
synchronized (this) {
return writeIndex();
}
}
private File getIndexFile() {
if (zipIndexFile == null) {
if (zipFile == null) {
return null;
}
zipIndexFile = new File((preindexedCacheLocation == null ? "" : preindexedCacheLocation) +
zipFile.getName() + ".index");
}
return zipIndexFile;
}
public File getZipFile() {
return zipFile;
}
File getAbsoluteFile() {
File absFile = (absFileRef == null ? null : absFileRef.get());
if (absFile == null) {
absFile = zipFile.getAbsoluteFile();
absFileRef = new SoftReference<File>(absFile);
}
return absFile;
}
private RelativeDirectory getRelativeDirectory(String path) {
RelativeDirectory rd;
SoftReference<RelativeDirectory> ref = relativeDirectoryCache.get(path);
if (ref != null) {
rd = ref.get();
if (rd != null)
return rd;
}
rd = new RelativeDirectory(path);
relativeDirectoryCache.put(path, new SoftReference<RelativeDirectory>(rd));
return rd;
}
static class Entry implements Comparable<Entry> {
public static final Entry[] EMPTY_ARRAY = {};
// Directory related
RelativeDirectory dir;
boolean isDir;
// File related
String name;
int offset;
int size;
int compressedSize;
long javatime;
private int nativetime;
public Entry(RelativePath path) {
this(path.dirname(), path.basename());
}
public Entry(RelativeDirectory directory, String name) {
this.dir = directory;
this.name = name;
}
public String getName() {
return new RelativeFile(dir, name).getPath();
}
public String getFileName() {
return name;
}
public long getLastModified() {
if (javatime == 0) {
javatime = dosToJavaTime(nativetime);
}
return javatime;
}
// based on dosToJavaTime in java.util.Zip, but avoiding the
// use of deprecated Date constructor
private static long dosToJavaTime(int dtime) {
Calendar c = Calendar.getInstance();
c.set(Calendar.YEAR, ((dtime >> 25) & 0x7f) + 1980);
c.set(Calendar.MONTH, ((dtime >> 21) & 0x0f) - 1);
c.set(Calendar.DATE, ((dtime >> 16) & 0x1f));
c.set(Calendar.HOUR_OF_DAY, ((dtime >> 11) & 0x1f));
c.set(Calendar.MINUTE, ((dtime >> 5) & 0x3f));
c.set(Calendar.SECOND, ((dtime << 1) & 0x3e));
c.set(Calendar.MILLISECOND, 0);
return c.getTimeInMillis();
}
void setNativeTime(int natTime) {
nativetime = natTime;
}
public boolean isDirectory() {
return isDir;
}
public int compareTo(Entry other) {
RelativeDirectory otherD = other.dir;
if (dir != otherD) {
int c = dir.compareTo(otherD);
if (c != 0)
return c;
}
return name.compareTo(other.name);
}
@Override
public boolean equals(Object o) {
if (!(o instanceof Entry))
return false;
Entry other = (Entry) o;
return dir.equals(other.dir) && name.equals(other.name);
}
@Override
public int hashCode() {
int hash = 7;
hash = 97 * hash + (this.dir != null ? this.dir.hashCode() : 0);
hash = 97 * hash + (this.name != null ? this.name.hashCode() : 0);
return hash;
}
@Override
public String toString() {
return isDir ? ("Dir:" + dir + " : " + name) :
(dir + ":" + name);
}
}
/*
* Exception primarily used to implement a failover, used exclusively here.
*/
static final class ZipFormatException extends IOException {
private static final long serialVersionUID = 8000196834066748623L;
protected ZipFormatException(String message) {
super(message);
}
protected ZipFormatException(String message, Throwable cause) {
super(message, cause);
}
}
}