org.ow2.bonita.pvm.internal.lob.BlobStrategyChopped Maven / Gradle / Ivy

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package org.ow2.bonita.pvm.internal.lob;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class BlobStrategyChopped implements BlobStrategy {

  int chopSize = 1024;

  public void set(byte[] bytes, Blob blob) {
    blob.setChops(chop(bytes));
  }

  public byte[] get(Blob blob) {
    return glue(blob.getChops());
  }

  public List chop(byte[] bytes) {
    List chops = null;
    if ((bytes != null) && (bytes.length > 0)) {
      chops = new ArrayList();
      int index = 0;
      while ((bytes.length - index) > chopSize) {
        byte[] byteBlock = new byte[chopSize];
        System.arraycopy(bytes, index, byteBlock, 0, chopSize);
        chops.add(byteBlock);
        index += chopSize;
      }
      byte[] byteBlock = new byte[bytes.length - index];
      System.arraycopy(bytes, index, byteBlock, 0, bytes.length - index);
      chops.add(byteBlock);
    }
    return chops;
  }

  @SuppressWarnings("unchecked")
  public byte[] glue(List chops) {
    byte[] bytes = null;
    if (chops != null) {
      Iterator iter = chops.iterator();
      while (iter.hasNext()) {
        byte[] byteBlock = (byte[]) iter.next();
        if (bytes == null) {
          bytes = byteBlock;
        } else {
          byte[] oldValue = bytes;
          bytes = new byte[bytes.length + byteBlock.length];
          System.arraycopy(oldValue, 0, bytes, 0, oldValue.length);
          System.arraycopy(byteBlock, 0, bytes, oldValue.length,
              byteBlock.length);
        }
      }
    }
    return bytes;
  }
}