Package org.encog.neural.thermal

Source Code of org.encog.neural.thermal.PersistBoltzmann

/*
* Encog(tm) Core v3.3 - Java Version
* http://www.heatonresearch.com/encog/
* https://github.com/encog/encog-java-core
* Copyright 2008-2014 Heaton Research, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*  
* For more information on Heaton Research copyrights, licenses
* and trademarks visit:
* http://www.heatonresearch.com/copyright
*/
package org.encog.neural.thermal;

import java.io.InputStream;
import java.io.OutputStream;
import java.util.Map;

import org.encog.persist.EncogFileSection;
import org.encog.persist.EncogPersistor;
import org.encog.persist.EncogReadHelper;
import org.encog.persist.EncogWriteHelper;
import org.encog.persist.PersistConst;
import org.encog.util.csv.CSVFormat;
import org.encog.util.csv.NumberList;

/**
* Persist the Boltzmann machine.
*
*/
public class PersistBoltzmann implements EncogPersistor {

  /**
   * {@inheritDoc}
   */
  @Override
  public int getFileVersion() {
    return 1;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public String getPersistClassString() {
    return "BoltzmannMachine";
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public Object read(final InputStream is) {
    final BoltzmannMachine result = new BoltzmannMachine();
    final EncogReadHelper in = new EncogReadHelper(is);
    EncogFileSection section;

    while ((section = in.readNextSection()) != null) {
      if (section.getSectionName().equals("BOLTZMANN")
          && section.getSubSectionName().equals("PARAMS")) {
        final Map<String, String> params = section.parseParams();
        result.getProperties().putAll(params);
      }
      if (section.getSectionName().equals("BOLTZMANN")
          && section.getSubSectionName().equals("NETWORK")) {
        final Map<String, String> params = section.parseParams();
        result.setWeights(NumberList.fromList(CSVFormat.EG_FORMAT,
            params.get(PersistConst.WEIGHTS)));
        result.setCurrentState(NumberList.fromList(CSVFormat.EG_FORMAT,
            params.get(PersistConst.OUTPUT)));
        result.setNeuronCount(EncogFileSection.parseInt(params,
            PersistConst.NEURON_COUNT));

        result.setThreshold(NumberList.fromList(CSVFormat.EG_FORMAT,
            params.get(PersistConst.THRESHOLDS)));
        result.setAnnealCycles(EncogFileSection.parseInt(params,
            BoltzmannMachine.ANNEAL_CYCLES));
        result.setRunCycles(EncogFileSection.parseInt(params,
            BoltzmannMachine.RUN_CYCLES));
        result.setTemperature(EncogFileSection.parseDouble(params,
            PersistConst.TEMPERATURE));
      }
    }

    return result;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void save(final OutputStream os, final Object obj) {
    final EncogWriteHelper out = new EncogWriteHelper(os);
    final BoltzmannMachine boltz = (BoltzmannMachine) obj;
    out.addSection("BOLTZMANN");
    out.addSubSection("PARAMS");
    out.addProperties(boltz.getProperties());
    out.addSubSection("NETWORK");
    out.writeProperty(PersistConst.WEIGHTS, boltz.getWeights());
    out.writeProperty(PersistConst.OUTPUT, boltz.getCurrentState()
        .getData());
    out.writeProperty(PersistConst.NEURON_COUNT, boltz.getNeuronCount());

    out.writeProperty(PersistConst.THRESHOLDS, boltz.getThreshold());
    out.writeProperty(BoltzmannMachine.ANNEAL_CYCLES,
        boltz.getAnnealCycles());
    out.writeProperty(BoltzmannMachine.RUN_CYCLES, boltz.getRunCycles());
    out.writeProperty(PersistConst.TEMPERATURE, boltz.getTemperature());

    out.flush();

  }

}
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