org.sape.carbon.core.util.jar
Class JarEntryOutputStream

java.lang.Object
  |
  +--java.io.OutputStream
        |
        +--java.io.ByteArrayOutputStream
              |
              +--org.sape.carbon.core.util.jar.JarEntryOutputStream

public class JarEntryOutputStream

extends ByteArrayOutputStream

An output stream that is used by EnhancedJarFile to write entries to a jar. This implementation uses a ByteArrayOutputStream to buffer the output until the stream is closed. When the stream is closed, the output is written to the jar. Copyright 2002 Sapient

Since:

carbon 1.0

Version:

$Revision: 1.9 $($Author: dvoet $ / $Date: 2003/05/05 21:21:23 $)

Author:

Douglas Voet, April 2002

Field Summary

private EnhancedJarFile	jar
private String	jarEntryName

Fields inherited from class java.io.ByteArrayOutputStream

buf, count

Constructor Summary

JarEntryOutputStream(EnhancedJarFile jar, String jarEntryName)
Constructor

Method Summary

void	close() Closes the stream and writes entry to the jar
private void	writeToJar() Writes the entry to a the jar file.

Methods inherited from class java.io.ByteArrayOutputStream

reset, size, toByteArray, toString, toString, toString, write, write, writeTo

Methods inherited from class java.io.OutputStream

flush, write

Methods inherited from class java.lang.Object

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

Field Detail

jar

private EnhancedJarFile jar

jarEntryName

private String jarEntryName

Constructor Detail

JarEntryOutputStream

public JarEntryOutputStream(EnhancedJarFile jar,
                            String jarEntryName)

Constructor

Parameters:

jar - the EnhancedJarFile that this instance will write to

jarEntryName - the name of the entry to be written

Method Detail

close

public void close()
           throws IOException

Closes the stream and writes entry to the jar

Overrides:

close in class ByteArrayOutputStream

IOException

writeToJar

private void writeToJar()
                 throws IOException

Writes the entry to a the jar file. This is done by creating a temporary jar file, copying the contents of the existing jar to the temp jar, skipping the entry named by this.jarEntryName if it exists. Then, if the stream was written to, then contents are written as a new entry. Last, a callback is made to the EnhancedJarFile to swap the temp jar in for the old jar.

IOException