com.microej.util

Class BsPatch

java.lang.Object

com.microej.util.BsPatch

public class BsPatch
extends Object

This utility class applies patches generated by bsdiff on files.

Example:

 // origFile is the original file to be patched
 String origFile = "original-file.txt"; //$NON-NLS-1$

 // patchFile provides the patch, as generated by bsdiff
 String patchFile = "original-file.patch"; //$NON-NLS-1$

 // resFile will contain the result of the patch operation
 String resFile = "result-file.txt"; //$NON-NLS-1$

 int blockBufferSize = 512;

 try (RandomAccessFile raf = new RandomAccessFile(origFile, "r"); //$NON-NLS-1$
                InputStream is = deflate(patchFile);
                OutputStream fos = new FileOutputStream(resFile)) {
        // apply the patch
        BsPatch.run(raf, fos, is, blockBufferSize);
 }
 

Note that the patchFile is typically stored in a compressed format.

Method Summary

Modifier and Type	Method and Description
static void	run(RandomAccessFile inputFile, OutputStream outputStream, InputStream patchStream, int blockBufferSize) Applies the patch on a file.

Methods inherited from class java.lang.Object

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

Method Detail

run

public static void run(RandomAccessFile inputFile,
                       OutputStream outputStream,
                       InputStream patchStream,
                       int blockBufferSize)
                throws IOException

Applies the patch on a file.

Parameters:

inputFile - the file on which the patch should be applied.

outputStream - the stream where to write the output of the operation.

patchStream - the stream providing the patch to apply.

blockBufferSize - the size of the block buffer.

Throws:

IOException