/*
* Copyright (c) 2009, 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
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*/
import java.io.*;
import java.util.*;
import java.util.regex.Pattern;
import javax.tools.*;
import com.sun.tools.classfile.*;
import com.sun.tools.classfile.Dependencies.*;
import com.sun.tools.classfile.Dependency.Location;
import com.sun.tools.javac.file.JavacFileManager;
import com.sun.tools.javac.util.Context;
/**
* Demo utility for using the classfile dependency analysis API framework.
*
* Usage:
* getdeps [options] classes
* where options include:
* -classpath path where to find classes to analyze
* -p package-name restrict analysis to classes in this package
* (may be given multiple times)
* -r regex restrict analysis to packages matching pattern
* (-p and -r are exclusive)
* -rev invert the dependencies in the output
* -t transitive closure of dependencies
*/
public class GetDeps {
public static void main(String... args) throws Exception {
new GetDeps().run(args);
}
void run(String... args) throws IOException, ClassFileNotFoundException {
PrintWriter pw = new PrintWriter(System.out);
try {
run(pw, args);
} finally {
pw.flush();
}
}
void run(PrintWriter out, String... args) throws IOException, ClassFileNotFoundException {
decodeArgs(args);
final StandardJavaFileManager fm = new JavacFileManager(new Context(), false, null);
if (classpath != null)
fm.setLocation(StandardLocation.CLASS_PATH, classpath);
ClassFileReader reader = new ClassFileReader(fm);
Dependencies d = new Dependencies();
if (regex != null)
d.setFilter(Dependencies.getRegexFilter(Pattern.compile(regex)));
if (packageNames.size() > 0)
d.setFilter(Dependencies.getPackageFilter(packageNames, false));
SortedRecorder r = new SortedRecorder(reverse);
d.findAllDependencies(reader, rootClassNames, transitiveClosure, r);
SortedMap<Location,SortedSet<Dependency>> deps = r.getMap();
for (Map.Entry<Location, SortedSet<Dependency>> e: deps.entrySet()) {
out.println(e.getKey());
for (Dependency dep: e.getValue()) {
out.println(" " + dep.getTarget());
}
}
}
void decodeArgs(String... args) {
rootClassNames = new TreeSet<String>();
packageNames = new TreeSet<String>();
for (int i = 0; i < args.length; i++) {
String arg = args[i];
if (arg.equals("-classpath") && (i + 1 < args.length))
classpath = getPathFiles(args[++i]);
else if (arg.equals("-p") && (i + 1 < args.length))
packageNames.add(args[++i]);
else if (arg.equals("-r") && (i + 1 < args.length))
regex = args[++i];
else if (arg.equals("-rev"))
reverse = true;
else if (arg.equals("-t"))
transitiveClosure = true;
else if (arg.startsWith("-"))
throw new Error(arg);
else {
for ( ; i < args.length; i++)
rootClassNames.add(args[i]);
}
}
}
List<File> getPathFiles(String path) {
List<File> files = new ArrayList<File>();
for (String p: path.split(File.pathSeparator)) {
if (p.length() > 0)
files.add(new File(p));
}
return files;
}
boolean transitiveClosure;
List<File> classpath;
Set<String> rootClassNames;
Set<String> packageNames;
String regex;
boolean reverse;
static class ClassFileReader implements Dependencies.ClassFileReader {
private JavaFileManager fm;
ClassFileReader(JavaFileManager fm) {
this.fm = fm;
}
@Override
public ClassFile getClassFile(String className) throws ClassFileNotFoundException {
try {
JavaFileObject fo = fm.getJavaFileForInput(
StandardLocation.CLASS_PATH, className, JavaFileObject.Kind.CLASS);
if (fo == null)
fo = fm.getJavaFileForInput(
StandardLocation.PLATFORM_CLASS_PATH, className, JavaFileObject.Kind.CLASS);
if (fo == null)
throw new ClassFileNotFoundException(className);
InputStream in = fo.openInputStream();
try {
return ClassFile.read(in);
} finally {
in.close();
}
} catch (ConstantPoolException e) {
throw new ClassFileNotFoundException(className, e);
} catch (IOException e) {
throw new ClassFileNotFoundException(className, e);
}
}
};
static class SortedRecorder implements Recorder {
public SortedRecorder(boolean reverse) {
this.reverse = reverse;
}
public void addDependency(Dependency d) {
Location o = (reverse ? d.getTarget() : d.getOrigin());
SortedSet<Dependency> odeps = map.get(o);
if (odeps == null) {
Comparator<Dependency> c = (reverse ? originComparator : targetComparator);
map.put(o, odeps = new TreeSet<Dependency>(c));
}
odeps.add(d);
}
public SortedMap<Location, SortedSet<Dependency>> getMap() {
return map;
}
private Comparator<Dependency> originComparator = new Comparator<Dependency>() {
public int compare(Dependency o1, Dependency o2) {
return o1.getOrigin().toString().compareTo(o2.getOrigin().toString());
}
};
private Comparator<Dependency> targetComparator = new Comparator<Dependency>() {
public int compare(Dependency o1, Dependency o2) {
return o1.getTarget().toString().compareTo(o2.getTarget().toString());
}
};
private Comparator<Location> locationComparator = new Comparator<Location>() {
public int compare(Location o1, Location o2) {
return o1.toString().compareTo(o2.toString());
}
};
private final SortedMap<Location, SortedSet<Dependency>> map =
new TreeMap<Location, SortedSet<Dependency>>(locationComparator);
boolean reverse;
}
}