Package lupos.io

Source Code of lupos.io.LuposObjectOutputStream

/**
* Copyright (c) 2013, Institute of Information Systems (Sven Groppe and contributors of LUPOSDATE), University of Luebeck
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
*   - Redistributions of source code must retain the above copyright notice, this list of conditions and the following
*     disclaimer.
*   - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
*     following disclaimer in the documentation and/or other materials provided with the distribution.
*   - Neither the name of the University of Luebeck nor the names of its contributors may be used to endorse or promote
*     products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package lupos.io;

import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.util.Collection;
import java.util.Map;
import java.util.SortedMap;
import java.util.SortedSet;
import java.util.TreeSet;

import lupos.datastructures.bindings.Bindings;
import lupos.datastructures.dbmergesortedds.DiskCollection;
import lupos.datastructures.dbmergesortedds.Entry;
import lupos.datastructures.items.Triple;
import lupos.datastructures.items.TripleKey;
import lupos.datastructures.smallerinmemorylargerondisk.SetImplementation;
import lupos.io.helper.OutHelper;

public class LuposObjectOutputStream extends ObjectOutputStream {

  public OutputStream os;

  public LuposObjectOutputStream() throws IOException {
  }

  public LuposObjectOutputStream(final OutputStream arg0) throws IOException {
    super(arg0);
    this.os = arg0;
  }

  protected Triple lastTriple = null;

  protected byte[] lastString = null;

  protected Bindings previousBindings = null;

  public void writeLuposObject(final Object arg0) throws IOException {
    Registration.serializeWithoutId(arg0, this);
  }

  public void writeLuposTriple(final Triple t) throws IOException {
    OutHelper.writeLuposTriple(t, this.lastTriple, this.os);
    this.lastTriple = t;
  }

  public void writeLuposTripleKey(final TripleKey tk) throws IOException {
    OutHelper.writeLuposTripleKey(tk, this.lastTriple, this.os);
  }

  public void writeLuposDifferenceString(final String s) throws IOException {
    this.lastString = OutHelper.writeLuposDifferenceString(s, this.lastString, this.os);
  }

  public void writeLuposBindings(final Bindings bindings) throws IOException {
    OutHelper.writeLuposBindings(bindings, this.previousBindings, this.os);
    this.previousBindings = bindings;
  }

  @SuppressWarnings("rawtypes")
  public void writeLuposDiskCollection(final DiskCollection dc) throws IOException {
    dc.writeLuposObject(this);
  }

  @SuppressWarnings({ "rawtypes", "unchecked" })
  public void writeLuposCollection(final Collection t) throws IOException {
    if (t.size() > 200) {
      this.os.write(255);
      final DiskCollection dc;
      if (t.size() > 0) {
        dc = new DiskCollection(t.iterator().next().getClass());
      } else {
        dc = new DiskCollection(Object.class);
      }
      dc.addAll(t);
      dc.writeLuposObject(this);
    } else {
      this.os.write(t.size());
      if (t.size() > 0) {
        Registration.serializeId(t.iterator().next(), this);
        for (final Object o : t) {
          Registration.serializeWithoutId(o, this);
        }
      }
    }
  }

  @SuppressWarnings("rawtypes")
  public void writeLuposTreeSet(final TreeSet t) throws IOException {
    this.writeObject(t.comparator());
    OutHelper.writeLuposInt(t.size(), this.os);
    if (t.size() > 0) {
      Registration.serializeId(t.iterator().next(), this);
    }
    for (final Object o : t) {
      Registration.serializeWithoutId(o, this);
    }
  }

  @SuppressWarnings("rawtypes")
  public void writeLuposSortedSet(final SortedSet t) throws IOException {
    this.writeObject(t.comparator());
    OutHelper.writeLuposInt(t.size(), this.os);
    if (t.size() > 0) {
      Registration.serializeId(t.iterator().next(), this);
    }
    for (final Object o : t) {
      Registration.serializeWithoutId(o, this);
    }

  }

  @SuppressWarnings("rawtypes")
  public void writeLuposSetImplementation(final SetImplementation t) throws IOException {
    OutHelper.writeLuposInt(t.size(), this.os);
    if (t.size() > 0){
      Registration.serializeId(t.iterator().next(), this);
    }
    for (final Object o : t) {
      Registration.serializeWithoutId(o, this);
    }
  }

  @SuppressWarnings({ "rawtypes", "unchecked" })
  public void writeLuposSortedMap(final SortedMap t) throws IOException {
    OutHelper.writeLuposByte((byte) 1, this.os);
    this.writeObject(t.comparator());
    OutHelper.writeLuposInt(t.size(), this.os);
    if (t.size() == 0) {
      return;
    }
    boolean flag = true;
    for (final Object mapentry : t.entrySet()) {
      final Object value = ((Map.Entry<Object, Object>) mapentry).getValue();
      final Object key = ((Map.Entry<Object, Object>) mapentry).getKey();

      if (flag) {
        flag = false;
        Registration.serializeId(key, this);
        Registration.serializeId(value, this);
      }

      Registration.serializeWithoutId(value, this);
      Registration.serializeWithoutId(key, this);
    }
  }

  @SuppressWarnings({ "unchecked", "rawtypes" })
  public void writeLuposEntry(final Entry e) throws IOException {
    OutHelper.writeLuposEntry(e, this);
  }
}
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