/*
* Encog(tm) Core v3.4 - Java Version
* http://www.heatonresearch.com/encog/
* https://github.com/encog/encog-java-core
* Copyright 2008-2016 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.ml.svm;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.StringReader;
import java.util.Map;
import org.encog.mathutil.libsvm.svm;
import org.encog.mathutil.libsvm.svm_model;
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.persist.PersistError;
/**
* Persist a SVM.
*/
public class PersistSVM implements EncogPersistor {
/**
* The parameter to hold the const C.
*/
public static final String PARAM_C = "C";
/**
* The parameter to hold the cache size.
*/
public static final String PARAM_CACHE_SIZE = "cacheSize";
/**
* The parameter to hold the coef0.
*/
public static final String PARAM_COEF0 = "coef0";
/**
* The parameter to hold the degree.
*/
public static final String PARAM_DEGREE = "degree";
/**
* The parameter to hold the eps.
*/
public static final String PARAM_EPS = "eps";
/**
* The parameter to hold the gamma.
*/
public static final String PARAM_GAMMA = "gamma";
/**
* The parameter to hold the kernel type.
*/
public static final String PARAM_KERNEL_TYPE = "kernelType";
/**
* The parameter to hold the number of weights.
*/
public static final String PARAM_NUM_WEIGHT = "nrWeight";
/**
* The parameter to hold the nu.
*/
public static final String PARAM_NU = "nu";
/**
* The parameter to hold the p.
*/
public static final String PARAM_P = "p";
/**
* The parameter to hold the probability.
*/
public static final String PARAM_PROBABILITY = "probability";
/**
* The parameter to hold the shrinking.
*/
public static final String PARAM_SHRINKING = "shrinking";
/**
* The parameter to hold the SVM type.
*/
public static final String PARAM_SVM_TYPE = "svmType";
/**
* The paramater to hold the weight.
*/
public static final String PARAM_WEIGHT = "weight";
/**
* The parameter to hold the weight label.
*/
public static final String PARAM_WEIGHT_LABEL = "weightLabel";
/**
* @return The file version.
*/
@Override
public int getFileVersion() {
return 1;
}
/**
* {@inheritDoc}
*/
@Override
public String getPersistClassString() {
return SVM.class.getSimpleName();
}
/**
* {@inheritDoc}
*/
@Override
public Object read(final InputStream is) {
final SVM result = new SVM();
final EncogReadHelper in = new EncogReadHelper(is);
EncogFileSection section;
while ((section = in.readNextSection()) != null) {
if (section.getSectionName().equals("SVM")
&& section.getSubSectionName().equals("PARAMS")) {
final Map params = section.parseParams();
result.getProperties().putAll(params);
}
if (section.getSectionName().equals("SVM")
&& section.getSubSectionName().equals("SVM-PARAM")) {
final Map params = section.parseParams();
result.setInputCount(EncogFileSection.parseInt(params,
PersistConst.INPUT_COUNT));
result.getParams().C = EncogFileSection.parseDouble(params,
PersistSVM.PARAM_C);
result.getParams().cache_size = EncogFileSection.parseDouble(
params, PersistSVM.PARAM_CACHE_SIZE);
result.getParams().coef0 = EncogFileSection.parseDouble(params,
PersistSVM.PARAM_COEF0);
result.getParams().degree = EncogFileSection.parseInt(params,
PersistSVM.PARAM_DEGREE);
result.getParams().eps = EncogFileSection.parseDouble(params,
PersistSVM.PARAM_EPS);
result.getParams().gamma = EncogFileSection.parseDouble(params,
PersistSVM.PARAM_GAMMA);
result.getParams().kernel_type = EncogFileSection.parseInt(
params, PersistSVM.PARAM_KERNEL_TYPE);
result.getParams().nr_weight = EncogFileSection.parseInt(
params, PersistSVM.PARAM_NUM_WEIGHT);
result.getParams().nu = EncogFileSection.parseDouble(params,
PersistSVM.PARAM_NU);
result.getParams().p = EncogFileSection.parseDouble(params,
PersistSVM.PARAM_P);
result.getParams().probability = EncogFileSection.parseInt(
params, PersistSVM.PARAM_PROBABILITY);
result.getParams().shrinking = EncogFileSection.parseInt(
params, PersistSVM.PARAM_SHRINKING);
result.getParams().svm_type = EncogFileSection.parseInt(params,
PersistSVM.PARAM_SVM_TYPE);
result.getParams().weight = section.parseDoubleArray(
params, PersistSVM.PARAM_WEIGHT);
result.getParams().weight_label = EncogFileSection
.parseIntArray(params, PersistSVM.PARAM_WEIGHT_LABEL);
} else if (section.getSectionName().equals("SVM")
&& section.getSubSectionName().equals("SVM-MODEL")) {
try {
final StringReader rdr = new StringReader(
section.getLinesAsString());
final BufferedReader br = new BufferedReader(rdr);
final svm_model model = svm.svm_load_model(br);
result.setModel(model);
br.close();
rdr.close();
} catch (final IOException ex) {
throw new PersistError(ex);
}
}
}
return result;
}
/**
* {@inheritDoc}
*/
@Override
public void save(final OutputStream os, final Object obj) {
final EncogWriteHelper out = new EncogWriteHelper(os);
final SVM svm2 = (SVM) obj;
out.addSection("SVM");
out.addSubSection("PARAMS");
out.addProperties(svm2.getProperties());
out.addSubSection("SVM-PARAM");
out.writeProperty(PersistConst.INPUT_COUNT, svm2.getInputCount());
out.writeProperty(PersistSVM.PARAM_C, svm2.getParams().C);
out.writeProperty(PersistSVM.PARAM_CACHE_SIZE,
svm2.getParams().cache_size);
out.writeProperty(PersistSVM.PARAM_COEF0, svm2.getParams().coef0);
out.writeProperty(PersistSVM.PARAM_DEGREE, svm2.getParams().degree);
out.writeProperty(PersistSVM.PARAM_EPS, svm2.getParams().eps);
out.writeProperty(PersistSVM.PARAM_GAMMA, svm2.getParams().gamma);
out.writeProperty(PersistSVM.PARAM_KERNEL_TYPE,
svm2.getParams().kernel_type);
out.writeProperty(
PersistSVM.PARAM_NUM_WEIGHT, svm2.getParams().nr_weight);
out.writeProperty(PersistSVM.PARAM_NU, svm2.getParams().nu);
out.writeProperty(PersistSVM.PARAM_P, svm2.getParams().p);
out.writeProperty(PersistSVM.PARAM_PROBABILITY,
svm2.getParams().probability);
out.writeProperty(PersistSVM.PARAM_SHRINKING,
svm2.getParams().shrinking);
out.writeProperty(PersistSVM.PARAM_SVM_TYPE, svm2.getParams().svm_type);
out.writeProperty(PersistSVM.PARAM_WEIGHT, svm2.getParams().weight);
out.writeProperty(PersistSVM.PARAM_WEIGHT_LABEL,
svm2.getParams().weight_label);
if (svm2.getModel() != null) {
out.addSubSection("SVM-MODEL");
try {
final ByteArrayOutputStream ba = new ByteArrayOutputStream();
final DataOutputStream das = new DataOutputStream(ba);
svm.svm_save_model(das, svm2.getModel());
out.write(ba.toString("UTF-8"));
das.close();
ba.close();
} catch (final IOException ex) {
throw new PersistError(ex);
}
}
out.flush();
}
}
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