/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o 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
for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see http://www.gnu.org/licenses/. */
package EDU.purdue.cs.bloat.strip;
import java.io.*;
import java.util.*;
import EDU.purdue.cs.bloat.context.*;
import EDU.purdue.cs.bloat.editor.*;
import EDU.purdue.cs.bloat.file.*;
import EDU.purdue.cs.bloat.reflect.*;
/**
* This class is a driver program that uses BLOAT to make a Java class file
* smaller by removing all non-essential information (such as debugging
* information) from it.
*/
public class Main implements Opcode {
private static int VERBOSE = 0;
private static boolean FORCE = false;
private static boolean CLOSURE = false;
private static final List SKIP = new ArrayList();
private static final List ONLY = new ArrayList();
public static void main(final String[] args) {
final ClassFileLoader loader = new ClassFileLoader();
List classes = new ArrayList();
boolean gotdir = false;
for (int i = 0; i < args.length; i++) {
if (args[i].equals("-v") || args[i].equals("-verbose")) {
Main.VERBOSE++;
} else if (args[i].equals("-help")) {
Main.usage();
} else if (args[i].equals("-classpath")) {
if (++i >= args.length) {
Main.usage();
}
final String classpath = args[i];
loader.setClassPath(classpath);
} else if (args[i].equals("-classpath/p")) {
if (++i >= args.length) {
Main.usage();
}
final String classpath = args[i];
loader.prependClassPath(classpath);
} else if (args[i].equals("-skip")) {
if (++i >= args.length) {
Main.usage();
}
final String pkg = args[i].replace('.', '/');
Main.SKIP.add(pkg);
} else if (args[i].equals("-only")) {
if (++i >= args.length) {
Main.usage();
}
final String pkg = args[i].replace('.', '/');
Main.ONLY.add(pkg);
} else if (args[i].equals("-closure")) {
Main.CLOSURE = true;
} else if (args[i].equals("-relax-loading")) {
ClassHierarchy.RELAX = true;
} else if (args[i].equals("-f")) {
Main.FORCE = true;
} else if (args[i].startsWith("-")) {
Main.usage();
} else if (i == args.length - 1) {
final File f = new File(args[i]);
if (f.exists() && !f.isDirectory()) {
System.err.println("No such directory: " + f.getPath());
System.exit(2);
}
loader.setOutputDir(f);
gotdir = true;
} else {
classes.add(args[i]);
}
}
if (!gotdir) {
Main.usage();
}
if (classes.size() == 0) {
Main.usage();
}
if (Main.VERBOSE > 3) {
ClassFileLoader.DEBUG = true;
ClassEditor.DEBUG = true;
}
boolean errors = false;
final Iterator iter = classes.iterator();
while (iter.hasNext()) {
final String name = (String) iter.next();
try {
loader.loadClass(name);
} catch (final ClassNotFoundException ex) {
System.err.println("Couldn't find class: " + ex.getMessage());
errors = true;
}
}
if (errors) {
System.exit(1);
}
final BloatContext context = new CachingBloatContext(loader, classes,
Main.CLOSURE);
if (!Main.CLOSURE) {
final Iterator e = classes.iterator();
while (e.hasNext()) {
final String name = (String) e.next();
try {
final ClassInfo info = loader.loadClass(name);
Main.decorateClass(context, info);
} catch (final ClassNotFoundException ex) {
System.err.println("Couldn't find class: "
+ ex.getMessage());
System.exit(1);
}
}
} else {
classes = null;
final ClassHierarchy hier = context.getHierarchy();
final Iterator e = hier.classes().iterator();
while (e.hasNext()) {
final Type t = (Type) e.next();
if (t.isObject()) {
try {
final ClassInfo info = loader.loadClass(t.className());
Main.decorateClass(context, info);
} catch (final ClassNotFoundException ex) {
System.err.println("Couldn't find class: "
+ ex.getMessage());
System.exit(1);
}
}
}
}
}
private static void usage() {
System.err
.println("Usage: java EDU.purdue.cs.bloat.decorate.Main "
+ "\n [-options] classes output_dir"
+ "\n"
+ "\nwhere options include:"
+ "\n -help print out this message"
+ "\n -v -verbose turn on verbose mode "
+ "(can be given multiple times)"
+ "\n -classpath <directories separated by colons>"
+ "\n list directories in which to look for classes"
+ "\n -f decorate files even if up-to-date"
+ "\n -closure recursively decorate referenced classes"
+ "\n -relax-loading don't report errors if a class is not found"
+ "\n -skip <class|package.*>"
+ "\n skip the given class or package"
+ "\n (this option can be given more than once)"
+ "\n -only <class|package.*>"
+ "\n skip all but the given class or package"
+ "\n (this option can be given more than once)");
System.exit(0);
}
private static void decorateClass(final EditorContext editor,
final ClassInfo info) {
final ClassFile classFile = (ClassFile) info;
if (!Main.FORCE) {
final File source = classFile.file();
final File target = classFile.outputFile();
if ((source != null) && (target != null) && source.exists()
&& target.exists()
&& (source.lastModified() < target.lastModified())) {
if (Main.VERBOSE > 1) {
System.out.println(classFile.name() + " is up to date");
}
return;
}
}
if (Main.VERBOSE > 2) {
classFile.print(System.out);
}
final ClassEditor c = editor.editClass(info);
boolean skip = false;
final String name = c.type().className();
final String qual = c.type().qualifier() + "/*";
// Edit only classes explicitly mentioned.
if (Main.ONLY.size() > 0) {
skip = true;
// Only edit classes we explicitly don't name.
for (int i = 0; i < Main.ONLY.size(); i++) {
final String pkg = (String) Main.ONLY.get(i);
if (name.equals(pkg) || qual.equals(pkg)) {
skip = false;
break;
}
}
}
// Don't edit classes we explicitly skip.
if (!skip) {
for (int i = 0; i < Main.SKIP.size(); i++) {
final String pkg = (String) Main.SKIP.get(i);
if (name.equals(pkg) || qual.equals(pkg)) {
skip = true;
break;
}
}
}
if (skip) {
if (Main.VERBOSE > 0) {
System.out.println("Skipping " + c.type().className());
}
editor.release(info);
return;
}
if (Main.VERBOSE > 0) {
System.out.println("Stripping class " + c.type().className());
}
if (Main.VERBOSE > 2) {
((ClassFile) info).print(System.out);
}
final MethodInfo[] methods = c.methods();
for (int j = 0; j < methods.length; j++) {
methods[j].setLineNumbers(null);
methods[j].setLocals(null);
editor.commit(methods[j]);
}
editor.commit(info);
}
}