/*
* 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.opp;
import java.util.List;
import org.encog.ml.prg.ProgramNode;
import org.encog.ml.prg.expvalue.ValueType;
/**
* The level holder class is passed down as a tree is mutated. The level holder
* class is initially given the desired output of the program and tracks the
* desired output for each of the nodes. This allows for type-safe crossovers
* and mutations.
*/
public class LevelHolder {
/**
* Determine if the specified child types are compatible with the parent types.
* @param parentTypes The parent types.
* @param childTypes The child types.
* @return True, if compatible.
*/
public static boolean compatibleTypes(final List<ValueType> parentTypes,
final List<ValueType> childTypes) {
for (final ValueType childType : childTypes) {
if (!parentTypes.contains(childType)) {
return false;
}
}
return true;
}
/**
* The current level in the tree.
*/
private int currentLevel;
/**
* The current node, or node found. This will be the mutation or crossover point.
*/
private ProgramNode nodeFound;
/**
* The types we are expecting at this l.
*/
private List<ValueType> types;
/**
* Construct the level holder.
* @param currentLevel The level to construct the holder for.
*/
public LevelHolder(final int currentLevel) {
super();
this.currentLevel = currentLevel;
}
/**
* Decrease the level.
*/
public void decreaseLevel() {
this.currentLevel--;
}
/**
* @return the currentLevel
*/
public int getCurrentLevel() {
return this.currentLevel;
}
/**
* @return the nodeFound
*/
public ProgramNode getNodeFound() {
return this.nodeFound;
}
/**
* @return the types
*/
public List<ValueType> getTypes() {
return this.types;
}
/**
* @param currentLevel
* the currentLevel to set
*/
public void setCurrentLevel(final int currentLevel) {
this.currentLevel = currentLevel;
}
/**
* @param nodeFound
* the nodeFound to set
*/
public void setNodeFound(final ProgramNode nodeFound) {
this.nodeFound = nodeFound;
}
/**
* @param types
* the types to set
*/
public void setTypes(final List<ValueType> types) {
this.types = types;
}
}