/*
 * Copyright (c) 2011 by Paul Seiferth, Zuse Institute Berlin
 *
 * Licensed under the BSD License, see LICENSE file for details.
 *
 */
package org.xtreemfs.common.libxtreemfs;

import java.util.Vector;

import org.xtreemfs.foundation.buffer.ReusableBuffer;
import org.xtreemfs.pbrpc.generatedinterfaces.GlobalTypes.StripingPolicy;

public class StripeTranslatorRaid0 implements StripeTranslator {

    public void translateWriteRequest(int size, long offset, StripingPolicy policy, ReusableBuffer buf,
            Vector<WriteOperation> operations) {
        // need to know stripe size and stripe width
        int stripeSize = policy.getStripeSize() * 1024; // stripe size in kB
        int osdCount = policy.getWidth();

        int start = 0;
        while (start < size) {
            long objNumber = (start + offset) / stripeSize;
            int osdOffset = (int) (objNumber % osdCount);
            int reqOffset = (int) ((start + offset) % stripeSize);
            int reqSize = Math.min(size - start, stripeSize - reqOffset);

            ReusableBuffer viewBuffer = buf.createViewBuffer();
            viewBuffer.range(start, reqSize);
            operations.add(new WriteOperation(objNumber, osdOffset, reqSize, reqOffset, viewBuffer));
            start += reqSize;
        }
    }

    public void translateReadRequest(int size, long offset, StripingPolicy policy,
            Vector<ReadOperation> operations) {
        // need to know stripe size and stripe width
        int stripeSize = policy.getStripeSize() * 1024; // strip size in kB
        int osdCount = policy.getWidth();

        int start = 0;
        while (start < size) {
            long objNumber = (start + offset) / stripeSize;
            int osdOffset = (int) (objNumber % osdCount);
            int reqOffset = (int) (start + offset) % stripeSize;
            int reqSize = Math.min(size - start, stripeSize - reqOffset);
            
            operations.add(new ReadOperation(objNumber, osdOffset, reqSize, reqOffset, start));
            start += reqSize;
        }
    }
}

@@ -1804,16 +1804,17 @@
 = (int) 
+(
 (start +
@@ -1826,32 +1826,33 @@
 et) %25 stripeSize
+)
 ;%0A            in

Add Bugfix for Issue 227