/*
* 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.prg.generator;
import java.util.List;
import java.util.Random;
import org.encog.ml.prg.EncogProgram;
import org.encog.ml.prg.EncogProgramContext;
import org.encog.ml.prg.ProgramNode;
import org.encog.ml.prg.expvalue.ValueType;
/**
* The full generator works by creating program trees that do not stop
* prematurely. To do this a node is randomly selected from the "function set"
* until the tree reaches the maximum depth. Once the tree reaches the maximum
* depth only nodes from the "terminal set" are chosen.
*
* This algorithm was implemented as described in the following publication:
*
* Genetic programming: on the programming of computers by means of natural
* selection MIT Press Cambridge, MA, USA (c)1992 ISBN:0-262-11170-5
*/
public class PrgFullGenerator extends AbstractPrgGenerator {
/**
* Construct the full generator.
* @param theContext The context.
* @param theMaxDepth The max depth.
*/
public PrgFullGenerator(final EncogProgramContext theContext,
final int theMaxDepth) {
super(theContext, theMaxDepth);
}
/**
* {@inheritDoc}
*/
@Override
public ProgramNode createNode(final Random rnd, final EncogProgram program,
final int depthRemaining, final List<ValueType> types) {
return createRandomNode(rnd, program, depthRemaining, types, false,
true);
}
}