src/org/objectweb/cjdbc/common/stream/CJDBCStream.java

説明を見る。

package org.objectweb.cjdbc.common.stream;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.InflaterInputStream;

public class CJDBCStream
{

  public static int CLEAN_INTERVAL = 10;

  public static final Object decompressObject(byte[] array) throws IOException,
      ClassNotFoundException
  {
    ByteArrayInputStream bos = new ByteArrayInputStream(array);
    InflaterInputStream zip = new InflaterInputStream(bos);
    ObjectInputStream oos = new ObjectInputStream(zip);
    Object obj = oos.readObject();
    oos.close();
    bos.close();
    return obj;
  }

  public static final byte[] compressObject(Object obj) throws IOException
  {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    DeflaterOutputStream zip = new DeflaterOutputStream(bos, new Deflater(
        Deflater.BEST_COMPRESSION));
    ObjectOutputStream oos = new ObjectOutputStream(zip);
    oos.writeObject(obj);
    oos.flush();
    oos.close();
    bos.close();
    byte[] data = bos.toByteArray();
    return data;
  }

  public static final int countBytes(Object obj) throws IOException
  {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    ObjectOutputStream oos = new ObjectOutputStream(bos);
    oos.writeObject(obj);
    oos.flush();
    oos.close();
    bos.close();
    return bos.size();
  }

}

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