com.jaxfront.core.util.io.classloader
Class DumpClassVersions

java.lang.Object
  com.jaxfront.core.util.io.classloader.DumpClassVersions

All Implemented Interfaces:

IJREVersion

public class DumpClassVersions
extends java.lang.Object
implements IJREVersion

A simple tool to dump class version stamps from a given set of classes. The input classes could be enumerated as standalone .class files or as contained in class libraries. This class recurses into all directories it encounters.

Usage: DumpClassVersions <file|dir|archive> <file|dir|archive> ...

This class is Java 1.1-compatible. It also serves as another demo of how to use IJREVersion.

Nested Class Summary

Nested classes/interfaces inherited from interface com.jaxfront.core.util.io.classloader.IJREVersion

IJREVersion._JREVersion

Field Summary

static java.lang.String

USAGE

Fields inherited from interface com.jaxfront.core.util.io.classloader.IJREVersion

JRE_1_2_PLUS, JRE_1_3_PLUS, JRE_1_4_PLUS

Constructor Summary

DumpClassVersions()

Method Summary

static java.lang.String	dump(java.lang.String className, byte[] classBytes)
static void	dumpClassFile(java.io.File file, java.io.PrintWriter out)
static void	dumpClassFile(java.lang.String className, java.lang.String location, byte[] in, java.io.PrintWriter out)
static void	dumpClassFile(java.lang.String className, java.lang.String location, java.io.InputStream in, java.io.PrintWriter out)
static void	dumpClassVersion(java.io.File file, java.io.PrintWriter out) Examines all class definitions that could be found in 'file' [which could be a directory or zip/jar archive] and dumps their version stamps to 'out'.
static void	dumpDirectory(java.io.File dir, java.io.PrintWriter out)
static java.lang.String	findManifestInfoInJAR(java.lang.Class<?> c, java.lang.String jarName, java.lang.String name)
static void	main(java.lang.String[] args)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

USAGE

public static final java.lang.String USAGE

See Also:

Constant Field Values

Constructor Detail

DumpClassVersions

public DumpClassVersions()

Method Detail

dump

public static java.lang.String dump(java.lang.String className,
                                    byte[] classBytes)

dumpClassFile

public static void dumpClassFile(java.io.File file,
                                 java.io.PrintWriter out)
                          throws java.io.IOException

Throws:

java.io.IOException

dumpClassFile

public static void dumpClassFile(java.lang.String className,
                                 java.lang.String location,
                                 byte[] in,
                                 java.io.PrintWriter out)
                          throws java.io.IOException

Throws:

java.io.IOException

dumpClassFile

public static void dumpClassFile(java.lang.String className,
                                 java.lang.String location,
                                 java.io.InputStream in,
                                 java.io.PrintWriter out)
                          throws java.io.IOException

Throws:

java.io.IOException

dumpClassVersion

public static void dumpClassVersion(java.io.File file,
                                    java.io.PrintWriter out)
                             throws java.io.IOException

Examines all class definitions that could be found in 'file' [which could be a directory or zip/jar archive] and dumps their version stamps to 'out'.

Throws:

java.io.IOException - on any I/O error

dumpDirectory

public static void dumpDirectory(java.io.File dir,
                                 java.io.PrintWriter out)
                          throws java.io.IOException

Throws:

java.io.IOException

findManifestInfoInJAR

public static java.lang.String findManifestInfoInJAR(java.lang.Class<?> c,
                                                     java.lang.String jarName,
                                                     java.lang.String name)
                                              throws java.io.IOException

Throws:

java.io.IOException

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Throws:

java.io.IOException