/**
 * Copyright 2015, Emory University
 * 
 * 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.
 */
package edu.emory.mathcs.nlp.component.doc;

import edu.emory.mathcs.nlp.component.template.OnlineComponent;
import edu.emory.mathcs.nlp.component.template.config.NLPConfig;
import edu.emory.mathcs.nlp.component.template.eval.AccuracyEval;
import edu.emory.mathcs.nlp.component.template.eval.Eval;
import edu.emory.mathcs.nlp.component.template.node.AbstractNLPNode;

import java.io.InputStream;
import java.util.List;

/**
 * @author Jinho D. Choi ({@code jinho.choi@emory.edu})
 */
public class DOCAnalyzer<N extends AbstractNLPNode<N>,S extends DOCState<N>> extends OnlineComponent<N,S>
{
	private static final long serialVersionUID = 408764219381044191L;
	public static final String FEAT_KEY = "doc_feat_key";
	protected String feat_key;

	public DOCAnalyzer() {super(true);}
	
	public DOCAnalyzer(InputStream configuration)
	{
		super(true, configuration);
	}
	
	@Override
	public NLPConfig<N> setConfiguration(InputStream in)
	{
		NLPConfig<N> config = new NLPConfig<N>(in);
		setConfiguration(config);
		feat_key = config.getTextContent(FEAT_KEY);
		return config;
	}
	
	@Override
	@SuppressWarnings("unchecked")
	protected S initState(List<N[]> document)
	{
		return (S)new DOCState<N>(document, feat_key);
	}
	
	@Override
	public void initFeatureTemplate()
	{
		feature_template = new DOCFeatureTemplate<N,S>(config.getFeatureTemplateElement(), getHyperParameter());
	}
	
	@Override
	public Eval createEvaluator()
	{
		return new AccuracyEval();
	}

	@Override
	protected void postProcess(S state) {}

	@Override
	protected S  initState(N[] nodes) {return null;}
}
