/*
* Copyright (c) 2008 Bradley W. Kimmel
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
package ca.eandb.jdcp.client;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import ca.eandb.util.UnexpectedException;
import ca.eandb.util.args.AbstractCommand;
import ca.eandb.util.io.FileUtil;
/**
* A <code>Command</code> that reports differences between the classes on the
* server and the classes in the specified directory tree.
* @author Brad Kimmel
*/
public final class VerifyCommand extends AbstractCommand<Configuration> {
/* (non-Javadoc)
* @see ca.eandb.util.args.AbstractCommand#run(java.lang.String[], java.lang.Object)
*/
@Override
protected void run(String[] args, Configuration conf) {
for (String arg : args) {
verify("", new File(arg), conf);
}
}
/**
* Reports classes in the specified directory tree which differ from those
* on the server or which do not exist on the server.
* @param pkg The package name associated with the root of the directory
* tree.
* @param path The <code>File</code> indicating the root of the directory
* tree.
* @param conf The application command line options.
*/
public void verify(String pkg, File path, Configuration conf) {
if (!path.isDirectory()) {
throw new IllegalArgumentException(path.getAbsolutePath().concat(" is not a directory."));
}
for (File file : path.listFiles()) {
if (file.isDirectory()) {
verify(combine(pkg, file.getName()), file, conf);
} else {
String fileName = file.getName();
int extensionSeparator = fileName.lastIndexOf('.');
if (extensionSeparator >= 0) {
String extension = fileName.substring(extensionSeparator + 1);
if (extension.equals("class")) {
String className = combine(pkg, fileName.substring(0, extensionSeparator));
try {
byte[] digest = conf.getJobService().getClassDigest(className);
if (digest == null) {
System.out.print("? ");
System.out.println(className);
} else if (!matches(file, digest, conf)) {
System.out.print("* ");
System.out.println(className);
} else if (conf.verbose) {
System.out.print("= ");
System.out.println(className);
}
} catch (FileNotFoundException e) {
throw new UnexpectedException(e);
} catch (IOException e) {
System.out.print("E ");
System.out.println(className);
}
}
}
}
}
}
/**
* Determines whether the digest of the specified file matches the given
* digest.
* @param file The <code>File</code> to check.
* @param digest The digest to compare against.
* @param conf The application command line options.
* @return A value indicating whether the digest of the specified file
* matches the given digest.
* @throws IOException If an error occurs while trying to read the file.
*/
private boolean matches(File file, byte[] digest, Configuration conf) throws IOException {
byte[] fileDigest = getDigest(file, conf);
return Arrays.equals(fileDigest, digest);
}
/**
* Gets the digest of the specified class definition.
* @param def The class definition.
* @param conf The application command line options.
* @return The digest of the class definition.
*/
private byte[] getDigest(File file, Configuration conf) throws IOException {
byte[] def = FileUtil.getFileContents(file);
MessageDigest alg;
try {
alg = MessageDigest.getInstance(conf.digestAlgorithm);
} catch (NoSuchAlgorithmException e) {
throw new UnexpectedException(e);
}
return alg.digest(def);
}
/**
* Combines package path.
* @param parent The parent package.
* @param child The name of the child package.
* @return The combined package name.
*/
private String combine(String parent, String child) {
if (parent.length() > 0) {
return parent.concat(".").concat(child);
} else {
return child;
}
}
}