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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.
*/
/*
* Contributor(s): Thomas Ball
*/
import org.netbeans.modules.classfile.*;
import java.io.*;
import java.util.*;
import java.util.zip.ZipFile;
import java.util.zip.ZipEntry;
/**
* ScanJar: load all of the classes of a specified jar file,
* useful for performance and regression testing.
*
* @author Thomas Ball
*/
public class ScanJar {
String jarName;
boolean includeCode;
boolean toString;
public static void main(String[] args) {
boolean includeCode = false;
boolean toString = false;
if (args.length == 0)
usage();
for (int i = 0; i < args.length; i++) {
if (args[i].equals("-includeCode"))
includeCode = true;
else if (args[i].equals("-toString"))
toString = true;
else if (args[i].charAt(0) == '-')
usage();
else {
try {
ScanJar sj = new ScanJar(args[i], includeCode, toString);
System.out.print("scanning " + args[i]);
if (includeCode || toString) {
System.out.print(": ");
if (includeCode)
System.out.print("includeCode ");
if (toString)
System.out.print("toString");
}
System.out.println();
ElapsedTimer timer = new ElapsedTimer();
int n = sj.scan();
System.out.println("scanned " + n + " files in " +
timer.toString());
} catch (IOException e) {
System.err.println("error accessing \"" + args[i] +
"\": " + e.toString());
}
}
}
}
ScanJar(String name, boolean incl, boolean tos) {
jarName = name;
includeCode = incl;
toString = tos;
}
/**
* Reads class entries from the jar file into ClassFile instances.
* Returns the number of classes scanned.
*/
public int scan() throws IOException {
int n = 0;
ZipFile zf = new ZipFile(jarName);
Enumeration files = zf.entries();
while (files.hasMoreElements()) {
ZipEntry entry = (ZipEntry)files.nextElement();
String name = entry.getName();
if (name.endsWith(".class")) {
InputStream in = zf.getInputStream(entry);
ClassFile cf = new ClassFile(in, includeCode);
if (toString)
try {
cf.toString(); // forces loading of attributes.
} catch (InvalidClassFileAttributeException ex) {
System.out.println("error accessing " + name);
throw ex;
}
in.close();
n++;
}
}
zf.close();
return n;
}
public static void usage() {
System.err.println("usage: java ScanJar [-includeCode] " +
"[-toString] <jar file> [ <jar file> ...]");
System.exit(1);
}
}
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