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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.bcel.classfile;
import static org.junit.Assert.assertEquals;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileFilter;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import org.junit.Assert;
import org.junit.Test;
/**
* Test that dump() methods work on the JDK classes
*/
public class JDKClassDumpTestCase {
@Test
public void testPerformance() throws Exception {
File javaLib = new File(System.getProperty("java.home") + "/lib");
javaLib.listFiles(new FileFilter() {
@Override
public boolean accept(final File file) {
if(file.getName().endsWith(".jar")) {
try {
testJar(file);
} catch (Exception e) {
Assert.fail(e.getMessage());
}
}
return false;
}
});
}
private void testJar(final File file) throws Exception {
System.out.println("parsing " + file);
JarFile jar = new JarFile(file);
Enumeration<JarEntry> en = jar.entries();
while (en.hasMoreElements()) {
JarEntry e = en.nextElement();
final String name = e.getName();
if (name.endsWith(".class")) {
// System.out.println("parsing " + name);
InputStream in = jar.getInputStream(e);
ClassParser parser = new ClassParser(in, name);
JavaClass jc = parser.parse();
compare(jc, jar.getInputStream(e), name);
}
}
jar.close();
}
private void compare(final JavaClass jc, final InputStream inputStream, final String name) throws Exception {
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
try (DataOutputStream dos = new DataOutputStream(baos)) {
jc.dump(dos);
}
try (DataInputStream src = new DataInputStream(inputStream)) {
int i = 0;
for (int out : baos.toByteArray()) {
int in = src.read();
assertEquals(name + ": Mismatch at " + i, in, out & 0xFF);
i++;
}
}
}
}
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