/***
* ASM tests
* Copyright (c) 2002,2003 France Telecom
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.objectweb.asm.attrs;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringReader;
import java.io.StringWriter;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Arrays;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import net.janino.ClassLoaderIClassLoader;
import net.janino.IClassLoader;
import net.janino.Parser;
import net.janino.Scanner;
import net.janino.Java.CompilationUnit;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.util.ASMifierClassVisitor;
import org.objectweb.asm.util.PrintClassVisitor;
import org.objectweb.asm.util.TraceClassVisitor;
/**
* Roundtrip test suite.
*
* @author Eugene Kuleshov
*/
public class AttrsAsmifierTest extends TestCase {
public static final Compiller COMPILLER = new JaninoCompiller();
private String className;
private final URL u;
public AttrsAsmifierTest( URL u, String className) {
super( "testAsmifier");
this.u = u;
this.className = className;
}
public static TestSuite suite() throws Exception {
TestSuite suite = new TestSuite( AttrsAsmifierTest.class.getName());
Class c = AttrsAsmifierTest.class;
String s = c.getResource( "/java/lang/String.class").toString();
int n = s.indexOf( '!');
URL u = new URL( s.substring( 4, n));
ZipInputStream zis = new ZipInputStream( u.openStream());
ZipEntry ze = null;
while(( ze = zis.getNextEntry())!=null) {
if( ze.getName().endsWith( ".class")) {
suite.addTest( new AttrsAsmifierTest( u, "jar:"+u.toString()+"!/"+ze.getName()));
}
}
return suite;
}
public void testAsmifier() throws Exception {
URL classUrl = new URL( className);
byte[] classData = getCode( classUrl.openStream());
StringWriter sw = new StringWriter();
ASMifierClassVisitor cv = new ASMifierClassVisitor( new PrintWriter( sw));
ClassReader cr = new ClassReader( classData);
cr.accept(cv, PrintClassVisitor.getDefaultAttributes(), false);
String name = classUrl.getFile();
String generated = sw.toString();
String cname = name.substring( name.lastIndexOf( '/')+1, name.length()-".class".length())+"Dump";
byte[] generatorClassData = COMPILLER.compile( cname, generated);
String nm = className.substring( className.indexOf( "!/")+2, className.length()-".class".length()).replace('/', '.');
Class c = loadClass("asm."+nm+"Dump", generatorClassData);
Method m = c.getMethod( "dump", new Class[0]);
byte[] newBytecode = ( byte[]) m.invoke(null, new Object[ 0]);
try {
assertTrue( "Different bytecode", Arrays.equals( newBytecode, classData));
} catch( Throwable ex) {
// HexDumpEncoder enc = new HexDumpEncoder();
// assertEquals( "Different bytecode\n"+traceBytecode(classData), enc.encode(classData), enc.encode(newBytecode));
assertEquals( "Different bytecode:\n"+generated, traceBytecode(classData), traceBytecode(newBytecode));
}
}
private static String traceBytecode( byte[] classData) {
StringWriter sw = new StringWriter();
ClassReader cr = new ClassReader( classData);
// cr.accept( new TraceClassVisitor( cw, new PrintWriter( System.out)),
cr.accept( new TraceClassVisitor( null, new PrintWriter( sw)), Attributes.getDefaultAttributes(), false);
return sw.toString();
}
private Class loadClass(String className, byte[] bytecode) throws ClassNotFoundException {
return new TestClassLoader( className, bytecode).loadClass( className);
}
public static byte[] getCode( InputStream is) throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
byte[] buff = new byte[ 1024];
int n = -1;
while(( n = is.read( buff))>-1) bos.write( buff, 0, n);
return bos.toByteArray();
}
// workaround for Ant's JUnit test runner
public String getName() {
return super.getName()+" : "+className;
}
private static final class TestClassLoader extends ClassLoader {
private final String className;
private final byte[] bytecode;
public TestClassLoader( String className, byte[] bytecode) {
super();
this.className = className;
this.bytecode = bytecode;
}
public Class loadClass( String name) throws ClassNotFoundException {
if( className.equals( name)) {
return super.defineClass( className, bytecode, 0, bytecode.length);
}
return super.loadClass( name);
}
}
private static interface Compiller {
byte[] compile(String name, String source) throws Exception;
}
/*
// require ECLIPSE_HOME\plugins\org.eclipse.jdt.core_3.0.0\jdtcore.jar
private static class EclipseCompiller implements Compiller {
public byte[] compile(String name, String source) throws Exception {
File f = new File( name+".java");
File cf = new File( name+".class");
byte[] code;
try {
FileWriter fw = new FileWriter( f);
fw.write(source);
fw.flush();
fw.close();
StringWriter sw = new StringWriter();
StringWriter sw2 = new StringWriter();
if( !org.eclipse.jdt.internal.compiler.batch.Main.compile( "-warn:unusedImport "+f.getName(), new PrintWriter(sw), new PrintWriter(sw2))) {
throw new RuntimeException( sw2.toString()+"\n-----\n"+sw.toString());
}
FileInputStream is = new FileInputStream( cf);
code = getCode( is);
is.close();
} finally {
f.delete();
cf.delete();
}
return code;
}
}
// require JDK_HOME/lib/tools.jar
private static class JavacCompiller implements Compiller {
public byte[] compile(String name, String source) throws Exception {
File f = new File( name+".java");
File cf = new File( name+".class");
byte[] code;
try {
FileWriter fw = new FileWriter( f);
fw.write(source);
fw.flush();
fw.close();
String[] args = new String[] { f.getName()};
StringWriter sw = new StringWriter();
int rc = com.sun.tools.javac.Main.compile( args, new PrintWriter( sw));
if( rc!=0) {
throw new RuntimeException( sw.toString());
}
FileInputStream is = new FileInputStream( cf);
code = getCode( is);
is.close();
} finally {
f.delete();
cf.delete();
}
return code;
}
}
*/
// require Janino from http://www.janino.net
private static class JaninoCompiller implements Compiller {
public byte[] compile( String name, String source) throws Exception {
// using janino embeddable compiller
Parser p = new Parser( new Scanner( name, new StringReader( source)));
CompilationUnit cu = p.parseCompilationUnit();
IClassLoader cl = new ClassLoaderIClassLoader( new URLClassLoader( new URL[] {}));
return cu.compile( cl, 0)[0].toByteArray();
}
}
}