org.apache.jdo.impl.enhancer

Class ClassFileEnhancerHelper

java.lang.Object

org.apache.jdo.impl.enhancer.ClassFileEnhancerHelper

public class ClassFileEnhancerHelper
extends java.lang.Object

This is a helper-class to perform some useful operations outside a byte code enhancer and delegate the real work to the enhancer.

Constructor Summary

Constructors

Constructor and Description
ClassFileEnhancerHelper()

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	enhanceClassFile(ClassFileEnhancer enhancer, java.io.InputStream in, java.io.OutputStream out) Enhances a classfile.
static boolean	enhanceZipFile(ClassFileEnhancer enhancer, java.util.zip.ZipInputStream zip_in, java.util.zip.ZipOutputStream zip_out) Enhances a zip file.

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassFileEnhancerHelper

public ClassFileEnhancerHelper()

Method Detail

enhanceClassFile

public static boolean enhanceClassFile(ClassFileEnhancer enhancer,
                       java.io.InputStream in,
                       java.io.OutputStream out)
                                throws EnhancerUserException,
                                       EnhancerFatalError

Enhances a classfile.

Parameters:

enhancer - The enhancer to delegate the work to.

in - The input stream with the Java class.

out - The output stream to write the enhanced class to.

Returns:

Has the input stream been enhanced?

Throws:

EnhancerUserException - If something went wrong.

EnhancerFatalError - If something went wrong.

See Also:

ClassFileEnhancer.enhanceClassFile(java.io.InputStream, java.io.OutputStream)

enhanceZipFile

public static boolean enhanceZipFile(ClassFileEnhancer enhancer,
                     java.util.zip.ZipInputStream zip_in,
                     java.util.zip.ZipOutputStream zip_out)
                              throws EnhancerUserException,
                                     EnhancerFatalError

Enhances a zip file. The zip file is given as a uip input stream. It's entries are read and - if necessary - individually enhanced. The output stream has the same compression (if any) as the input stream.

Parameters:

enhancer - The enhancer.

zip_in - The zip input stream.

zip_out - The zip output stream.

Returns:

true if at least one entry of the zip file has been enhanced, false otherwise.

Throws:

EnhancerUserException - If something went wrong.

EnhancerFatalError - If something went wrong.

See Also:

ClassFileEnhancer.enhanceClassFile(java.io.InputStream, java.io.OutputStream)