JDK8/Java8源码在线阅读
/*
* Copyright (c) 2003, 2013, 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.java.util.jar.pack;
import com.sun.java.util.jar.pack.Attribute.Layout;
import java.beans.PropertyChangeListener;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import java.util.SortedMap;
import java.util.TimeZone;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.jar.JarInputStream;
import java.util.jar.Pack200;
/*
* Implementation of the Pack provider.
* </pre></blockquote>
* @author John Rose
* @author Kumar Srinivasan
*/
public class PackerImpl extends TLGlobals implements Pack200.Packer {
/**
* Constructs a Packer object and sets the initial state of
* the packer engines.
*/
public PackerImpl() {}
/**
* Get the set of options for the pack and unpack engines.
* @return A sorted association of option key strings to option values.
*/
public SortedMap<String, String> properties() {
return props;
}
//Driver routines
/**
* Takes a JarFile and converts into a pack-stream.
* <p>
* Closes its input but not its output. (Pack200 archives are appendable.)
* @param in a JarFile
* @param out an OutputStream
* @exception IOException if an error is encountered.
*/
public synchronized void pack(JarFile in, OutputStream out) throws IOException {
assert(Utils.currentInstance.get() == null);
TimeZone tz = (props.getBoolean(Utils.PACK_DEFAULT_TIMEZONE))
? null
: TimeZone.getDefault();
try {
Utils.currentInstance.set(this);
if (tz != null) TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
if ("0".equals(props.getProperty(Pack200.Packer.EFFORT))) {
Utils.copyJarFile(in, out);
} else {
(new DoPack()).run(in, out);
}
} finally {
Utils.currentInstance.set(null);
if (tz != null) TimeZone.setDefault(tz);
in.close();
}
}
/**
* Takes a JarInputStream and converts into a pack-stream.
* <p>
* Closes its input but not its output. (Pack200 archives are appendable.)
* <p>
* The modification time and deflation hint attributes are not available,
* for the jar-manifest file and the directory containing the file.
*
* @see #MODIFICATION_TIME
* @see #DEFLATION_HINT
* @param in a JarInputStream
* @param out an OutputStream
* @exception IOException if an error is encountered.
*/
public synchronized void pack(JarInputStream in, OutputStream out) throws IOException {
assert(Utils.currentInstance.get() == null);
TimeZone tz = (props.getBoolean(Utils.PACK_DEFAULT_TIMEZONE)) ? null :
TimeZone.getDefault();
try {
Utils.currentInstance.set(this);
if (tz != null) TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
if ("0".equals(props.getProperty(Pack200.Packer.EFFORT))) {
Utils.copyJarFile(in, out);
} else {
(new DoPack()).run(in, out);
}
} finally {
Utils.currentInstance.set(null);
if (tz != null) TimeZone.setDefault(tz);
in.close();
}
}
/**
* Register a listener for changes to options.
* @param listener An object to be invoked when a property is changed.
*/
public void addPropertyChangeListener(PropertyChangeListener listener) {
props.addListener(listener);
}
/**
* Remove a listener for the PropertyChange event.
* @param listener The PropertyChange listener to be removed.
*/
public void removePropertyChangeListener(PropertyChangeListener listener) {
props.removeListener(listener);
}
// All the worker bees.....
// The packer worker.
private class DoPack {
final int verbose = props.getInteger(Utils.DEBUG_VERBOSE);
{
props.setInteger(Pack200.Packer.PROGRESS, 0);
if (verbose > 0) Utils.log.info(props.toString());
}
// Here's where the bits are collected before getting packed, we also
// initialize the version numbers now.
final Package pkg = new Package(Package.Version.makeVersion(props, "min.class"),
Package.Version.makeVersion(props, "max.class"),
Package.Version.makeVersion(props, "package"));
final String unknownAttrCommand;
{
String uaMode = props.getProperty(Pack200.Packer.UNKNOWN_ATTRIBUTE, Pack200.Packer.PASS);
if (!(Pack200.Packer.STRIP.equals(uaMode) ||
Pack200.Packer.PASS.equals(uaMode) ||
Pack200.Packer.ERROR.equals(uaMode))) {
throw new RuntimeException("Bad option: " + Pack200.Packer.UNKNOWN_ATTRIBUTE + " = " + uaMode);
}
unknownAttrCommand = uaMode.intern();
}
final String classFormatCommand;
{
String fmtMode = props.getProperty(Utils.CLASS_FORMAT_ERROR, Pack200.Packer.PASS);
if (!(Pack200.Packer.PASS.equals(fmtMode) ||
Pack200.Packer.ERROR.equals(fmtMode))) {
throw new RuntimeException("Bad option: " + Utils.CLASS_FORMAT_ERROR + " = " + fmtMode);
}
classFormatCommand = fmtMode.intern();
}
final Map<Attribute.Layout, Attribute> attrDefs;
final Map<Attribute.Layout, String> attrCommands;
{
Map<Attribute.Layout, Attribute> lattrDefs = new HashMap<>();
Map<Attribute.Layout, String> lattrCommands = new HashMap<>();
String[] keys = {
Pack200.Packer.CLASS_ATTRIBUTE_PFX,
Pack200.Packer.FIELD_ATTRIBUTE_PFX,
Pack200.Packer.METHOD_ATTRIBUTE_PFX,
Pack200.Packer.CODE_ATTRIBUTE_PFX
};
int[] ctypes = {
Constants.ATTR_CONTEXT_CLASS,
Constants.ATTR_CONTEXT_FIELD,
Constants.ATTR_CONTEXT_METHOD,
Constants.ATTR_CONTEXT_CODE
};
for (int i = 0; i < ctypes.length; i++) {
String pfx = keys[i];
Map<String, String> map = props.prefixMap(pfx);
for (String key : map.keySet()) {
assert(key.startsWith(pfx));
String name = key.substring(pfx.length());
String layout = props.getProperty(key);
Layout lkey = Attribute.keyForLookup(ctypes[i], name);
if (Pack200.Packer.STRIP.equals(layout) ||
Pack200.Packer.PASS.equals(layout) ||
Pack200.Packer.ERROR.equals(layout)) {
lattrCommands.put(lkey, layout.intern());
} else {
Attribute.define(lattrDefs, ctypes[i], name, layout);
if (verbose > 1) {
Utils.log.fine("Added layout for "+Constants.ATTR_CONTEXT_NAME[i]+" attribute "+name+" = "+layout);
}
assert(lattrDefs.containsKey(lkey));
}
}
}
this.attrDefs = (lattrDefs.isEmpty()) ? null : lattrDefs;
this.attrCommands = (lattrCommands.isEmpty()) ? null : lattrCommands;
}
final boolean keepFileOrder
= props.getBoolean(Pack200.Packer.KEEP_FILE_ORDER);
final boolean keepClassOrder
= props.getBoolean(Utils.PACK_KEEP_CLASS_ORDER);
final boolean keepModtime
= Pack200.Packer.KEEP.equals(props.getProperty(Pack200.Packer.MODIFICATION_TIME));
final boolean latestModtime
= Pack200.Packer.LATEST.equals(props.getProperty(Pack200.Packer.MODIFICATION_TIME));
final boolean keepDeflateHint
= Pack200.Packer.KEEP.equals(props.getProperty(Pack200.Packer.DEFLATE_HINT));
{
if (!keepModtime && !latestModtime) {
int modtime = props.getTime(Pack200.Packer.MODIFICATION_TIME);
if (modtime != Constants.NO_MODTIME) {
pkg.default_modtime = modtime;
}
}
if (!keepDeflateHint) {
boolean deflate_hint = props.getBoolean(Pack200.Packer.DEFLATE_HINT);
if (deflate_hint) {
pkg.default_options |= Constants.AO_DEFLATE_HINT;
}
}
}
long totalOutputSize = 0;
int segmentCount = 0;
long segmentTotalSize = 0;
long segmentSize = 0; // running counter
final long segmentLimit;
{
long limit;
if (props.getProperty(Pack200.Packer.SEGMENT_LIMIT, "").equals(""))
limit = -1;
else
limit = props.getLong(Pack200.Packer.SEGMENT_LIMIT);
limit = Math.min(Integer.MAX_VALUE, limit);
limit = Math.max(-1, limit);
if (limit == -1)
limit = Long.MAX_VALUE;
segmentLimit = limit;
}
final List<String> passFiles; // parsed pack.pass.file options
{
// Which class files will be passed through?
passFiles = props.getProperties(Pack200.Packer.PASS_FILE_PFX);
for (ListIterator<String> i = passFiles.listIterator(); i.hasNext(); ) {
String file = i.next();
if (file == null) { i.remove(); continue; }
file = Utils.getJarEntryName(file); // normalize '\\' to '/'
if (file.endsWith("/"))
file = file.substring(0, file.length()-1);
i.set(file);
}
if (verbose > 0) Utils.log.info("passFiles = " + passFiles);
}
{
// Hook for testing: Forces use of special archive modes.
int opt = props.getInteger(Utils.COM_PREFIX+"archive.options");
if (opt != 0)
pkg.default_options |= opt;
}
// (Done collecting options from props.)
boolean isClassFile(String name) {
if (!name.endsWith(".class")) return false;
for (String prefix = name; ; ) {
if (passFiles.contains(prefix)) return false;
int chop = prefix.lastIndexOf('/');
if (chop < 0) break;
prefix = prefix.substring(0, chop);
}
return true;
}
boolean isMetaInfFile(String name) {
return name.startsWith("/" + Utils.METAINF) ||
name.startsWith(Utils.METAINF);
}
// Get a new package, based on the old one.
private void makeNextPackage() {
pkg.reset();
}
final class InFile {
final String name;
final JarFile jf;
final JarEntry je;
final File f;
int modtime = Constants.NO_MODTIME;
int options;
InFile(String name) {
this.name = Utils.getJarEntryName(name);
this.f = new File(name);
this.jf = null;
this.je = null;
int timeSecs = getModtime(f.lastModified());
if (keepModtime && timeSecs != Constants.NO_MODTIME) {
this.modtime = timeSecs;
} else if (latestModtime && timeSecs > pkg.default_modtime) {
pkg.default_modtime = timeSecs;
}
}
InFile(JarFile jf, JarEntry je) {
this.name = Utils.getJarEntryName(je.getName());
this.f = null;
this.jf = jf;
this.je = je;
int timeSecs = getModtime(je.getTime());
if (keepModtime && timeSecs != Constants.NO_MODTIME) {
this.modtime = timeSecs;
} else if (latestModtime && timeSecs > pkg.default_modtime) {
pkg.default_modtime = timeSecs;
}
if (keepDeflateHint && je.getMethod() == JarEntry.DEFLATED) {
options |= Constants.FO_DEFLATE_HINT;
}
}
InFile(JarEntry je) {
this(null, je);
}
long getInputLength() {
long len = (je != null)? je.getSize(): f.length();
assert(len >= 0) : this+".len="+len;
// Bump size by pathname length and modtime/def-hint bytes.
return Math.max(0, len) + name.length() + 5;
}
int getModtime(long timeMillis) {
// Convert milliseconds to seconds.
long seconds = (timeMillis+500) / 1000;
if ((int)seconds == seconds) {
return (int)seconds;
} else {
Utils.log.warning("overflow in modtime for "+f);
return Constants.NO_MODTIME;
}
}
void copyTo(Package.File file) {
if (modtime != Constants.NO_MODTIME)
file.modtime = modtime;
file.options |= options;
}
InputStream getInputStream() throws IOException {
if (jf != null)
return jf.getInputStream(je);
else
return new FileInputStream(f);
}
public String toString() {
return name;
}
}
private int nread = 0; // used only if (verbose > 0)
private void noteRead(InFile f) {
nread++;
if (verbose > 2)
Utils.log.fine("...read "+f.name);
if (verbose > 0 && (nread % 1000) == 0)
Utils.log.info("Have read "+nread+" files...");
}
void run(JarInputStream in, OutputStream out) throws IOException {
// First thing we do is get the manifest, as JIS does
// not provide the Manifest as an entry.
if (in.getManifest() != null) {
ByteArrayOutputStream tmp = new ByteArrayOutputStream();
in.getManifest().write(tmp);
InputStream tmpIn = new ByteArrayInputStream(tmp.toByteArray());
pkg.addFile(readFile(JarFile.MANIFEST_NAME, tmpIn));
}
for (JarEntry je; (je = in.getNextJarEntry()) != null; ) {
InFile inFile = new InFile(je);
String name = inFile.name;
Package.File bits = readFile(name, in);
Package.File file = null;
// (5078608) : discount the resource files in META-INF
// from segment computation.
long inflen = (isMetaInfFile(name))
? 0L
: inFile.getInputLength();
if ((segmentSize += inflen) > segmentLimit) {
segmentSize -= inflen;
int nextCount = -1; // don't know; it's a stream
flushPartial(out, nextCount);
}
if (verbose > 1) {
Utils.log.fine("Reading " + name);
}
assert(je.isDirectory() == name.endsWith("/"));
if (isClassFile(name)) {
file = readClass(name, bits.getInputStream());
}
if (file == null) {
file = bits;
pkg.addFile(file);
}
inFile.copyTo(file);
noteRead(inFile);
}
flushAll(out);
}
void run(JarFile in, OutputStream out) throws IOException {
List<InFile> inFiles = scanJar(in);
if (verbose > 0)
Utils.log.info("Reading " + inFiles.size() + " files...");
int numDone = 0;
for (InFile inFile : inFiles) {
String name = inFile.name;
// (5078608) : discount the resource files completely from segmenting
long inflen = (isMetaInfFile(name))
? 0L
: inFile.getInputLength() ;
if ((segmentSize += inflen) > segmentLimit) {
segmentSize -= inflen;
// Estimate number of remaining segments:
float filesDone = numDone+1;
float segsDone = segmentCount+1;
float filesToDo = inFiles.size() - filesDone;
float segsToDo = filesToDo * (segsDone/filesDone);
if (verbose > 1)
Utils.log.fine("Estimated segments to do: "+segsToDo);
flushPartial(out, (int) Math.ceil(segsToDo));
}
InputStream strm = inFile.getInputStream();
if (verbose > 1)
Utils.log.fine("Reading " + name);
Package.File file = null;
if (isClassFile(name)) {
file = readClass(name, strm);
if (file == null) {
strm.close();
strm = inFile.getInputStream();
}
}
if (file == null) {
file = readFile(name, strm);
pkg.addFile(file);
}
inFile.copyTo(file);
strm.close(); // tidy up
noteRead(inFile);
numDone += 1;
}
flushAll(out);
}
Package.File readClass(String fname, InputStream in) throws IOException {
Package.Class cls = pkg.new Class(fname);
in = new BufferedInputStream(in);
ClassReader reader = new ClassReader(cls, in);
reader.setAttrDefs(attrDefs);
reader.setAttrCommands(attrCommands);
reader.unknownAttrCommand = unknownAttrCommand;
try {
reader.read();
} catch (IOException ioe) {
String message = "Passing class file uncompressed due to";
if (ioe instanceof Attribute.FormatException) {
Attribute.FormatException ee = (Attribute.FormatException) ioe;
// He passed up the category to us in layout.
if (ee.layout.equals(Pack200.Packer.PASS)) {
Utils.log.info(ee.toString());
Utils.log.warning(message + " unrecognized attribute: " +
fname);
return null;
}
} else if (ioe instanceof ClassReader.ClassFormatException) {
ClassReader.ClassFormatException ce = (ClassReader.ClassFormatException) ioe;
if (classFormatCommand.equals(Pack200.Packer.PASS)) {
Utils.log.info(ce.toString());
Utils.log.warning(message + " unknown class format: " +
fname);
return null;
}
}
// Otherwise, it must be an error.
throw ioe;
}
pkg.addClass(cls);
return cls.file;
}
// Read raw data.
Package.File readFile(String fname, InputStream in) throws IOException {
Package.File file = pkg.new File(fname);
file.readFrom(in);
if (file.isDirectory() && file.getFileLength() != 0)
throw new IllegalArgumentException("Non-empty directory: "+file.getFileName());
return file;
}
void flushPartial(OutputStream out, int nextCount) throws IOException {
if (pkg.files.isEmpty() && pkg.classes.isEmpty()) {
return; // do not flush an empty segment
}
flushPackage(out, Math.max(1, nextCount));
props.setInteger(Pack200.Packer.PROGRESS, 25);
// In case there will be another segment:
makeNextPackage();
segmentCount += 1;
segmentTotalSize += segmentSize;
segmentSize = 0;
}
void flushAll(OutputStream out) throws IOException {
props.setInteger(Pack200.Packer.PROGRESS, 50);
flushPackage(out, 0);
out.flush();
props.setInteger(Pack200.Packer.PROGRESS, 100);
segmentCount += 1;
segmentTotalSize += segmentSize;
segmentSize = 0;
if (verbose > 0 && segmentCount > 1) {
Utils.log.info("Transmitted "
+segmentTotalSize+" input bytes in "
+segmentCount+" segments totaling "
+totalOutputSize+" bytes");
}
}
/** Write all information in the current package segment
* to the output stream.
*/
void flushPackage(OutputStream out, int nextCount) throws IOException {
int nfiles = pkg.files.size();
if (!keepFileOrder) {
/**代码未完, 请加载全部代码(NowJava.com).**/
关注时代Java
关注时代Java