package com.yahoo.labs.samoa.learners.classifiers.trees;

/*
 * #%L
 * SAMOA
 * %%
 * Copyright (C) 2013 Yahoo! 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.
 * #L%
 */

import com.yahoo.labs.samoa.instances.Instance;

/**
 * Abstract class that represents a learning node
 * @author Arinto Murdopo
 *
 */
abstract class LearningNode extends Node {

	private static final long serialVersionUID = 7157319356146764960L;
	
	protected LearningNode(double[] classObservation) {
		super(classObservation);
	}
	
	/**
	 * Method to process the instance for learning
	 * @param inst The processed instance
	 * @param proc The model aggregator processor where this learning node exists
	 */
	abstract void learnFromInstance(Instance inst, ModelAggregatorProcessor proc);
	
	@Override
	protected boolean isLeaf(){
		return true;
	}
	
	@Override
	protected FoundNode filterInstanceToLeaf(Instance inst, SplitNode parent,
			int parentBranch) {
		return new FoundNode(this, parent, parentBranch);
	}
}