// Path: src/main/java/com/asher_stern/crf/crf/CrfModel.java
// public class CrfModel<K,G> implements Serializable // K = token, G = tag
// {
// 	private static final long serialVersionUID = -5703467522848303660L;
// 	
// 	public CrfModel(CrfTags<G> crfTags, CrfFeaturesAndFilters<K, G> features, ArrayList<BigDecimal> parameters)
// 	{
// 		super();
// 		this.crfTags = crfTags;
// 		this.features = features;
// 		this.parameters = parameters;
// 	}
// 	
// 	
// 	
// 	public CrfTags<G> getCrfTags()
// 	{
// 		return crfTags;
// 	}
// 	public CrfFeaturesAndFilters<K, G> getFeatures()
// 	{
// 		return features;
// 	}
// 	public ArrayList<BigDecimal> getParameters()
// 	{
// 		return parameters;
// 	}
// 
// 
// 
// 	private final CrfTags<G> crfTags;
// 	private final CrfFeaturesAndFilters<K, G> features;
// 	private final ArrayList<BigDecimal> parameters;
// }
// 
// Path: src/main/java/com/asher_stern/crf/crf/run/CrfInferencePerformer.java
// public class CrfInferencePerformer<K, G>
// {
// 	public CrfInferencePerformer(CrfModel<K, G> model)
// 	{
// 		super();
// 		this.model = model;
// 	}
// 
// 	/**
// 	 * Finds the most likely sequence of tags for the given sequence of tokens
// 	 * @param sequence A sequence of tokens
// 	 * @return A list in which each element is a {@link TaggedToken}, which encapsulates a token and its tag.
// 	 */
// 	public List<TaggedToken<K,G>> tagSequence(List<K> sequence)
// 	{
// 		if (null==sequence) {return null;}
// 		if (sequence.size()==0) {return Collections.<TaggedToken<K,G>>emptyList();}
// 		
// 		@SuppressWarnings("unchecked")
// 		K[] sentenceAsArray = sequence.toArray( (K[]) Array.newInstance(sequence.get(0).getClass(), sequence.size()) );
// 		CrfInferenceViterbi<K, G> crfInference = new CrfInferenceViterbi<K, G>(model, sentenceAsArray);
// 		G[] bestTags = crfInference.inferBestTagSequence();
// 
// 		if (sentenceAsArray.length!=bestTags.length) {throw new CrfException("Inference failed. Array of tags differs in length from array of tokens.");}
// 		
// 		List<TaggedToken<K,G>> ret = new ArrayList<TaggedToken<K,G>>();
// 		for (int index=0;index<sentenceAsArray.length;++index)
// 		{
// 			ret.add(new TaggedToken<K,G>(sentenceAsArray[index], bestTags[index]));
// 		}
// 		return ret;
// 
// 	}
// 
// 	private final CrfModel<K, G> model;
// }
// 
// Path: src/main/java/com/asher_stern/crf/postagging/postaggers/PosTaggerLoader.java
// public interface PosTaggerLoader
// {
// 	/**
// 	 * Load the {@link PosTagger} from the file-system and return it.
// 	 * @param directory A directory in the file-system which contains the model of the {@link PosTagger}.
// 	 * This model was earlier created and saved by {@link PosTaggerTrainer#save(File)}.
// 	 *  
// 	 * @return
// 	 */
// 	public PosTagger load(File directory);
// 
// }
// 
// Path: src/main/java/com/asher_stern/crf/utilities/CrfException.java
// public class CrfException extends RuntimeException
// {
// 	private static final long serialVersionUID = 5414394233000815286L;
// 
// 	public CrfException()
// 	{
// 		super();
// 	}
// 
// 	public CrfException(String message, Throwable cause,
// 			boolean enableSuppression, boolean writableStackTrace)
// 	{
// 		super(message, cause, enableSuppression, writableStackTrace);
// 	}
// 
// 	public CrfException(String message, Throwable cause)
// 	{
// 		super(message, cause);
// 	}
// 
// 	public CrfException(String message)
// 	{
// 		super(message);
// 	}
// 
// 	public CrfException(Throwable cause)
// 	{
// 		super(cause);
// 	}
// 	
// 
// }


import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import com.asher_stern.crf.crf.CrfModel;
import com.asher_stern.crf.crf.run.CrfInferencePerformer;
import com.asher_stern.crf.postagging.postaggers.PosTaggerLoader;
import com.asher_stern.crf.utilities.CrfException;
package com.asher_stern.crf.postagging.postaggers.crf;



/**
 * Loads a {@link CrfPosTagger} from a model that is stored in a directory in the file-system.
 * The model was earlier saved in the file-system by {@link CrfPosTaggerTrainer#save(File)}.
 * 
 * @author Asher Stern
 * Date: Nov 20, 2014
 *
 */
public class CrfPosTaggerLoader implements PosTaggerLoader
{
	/*
	 * (non-Javadoc)
	 * @see org.postagging.postaggers.PosTaggerLoader#load(java.io.File)
	 */
	@Override
	public CrfPosTagger load(File directory)
	{
		if (!directory.exists()) {throw new CrfException("Given directory: "+directory.getAbsolutePath()+" does not exist.");}
		if (!directory.isDirectory()) {throw new CrfException("The loader requires a directory, but was provided with a file: "+directory.getAbsolutePath()+".");}
		
		try(ObjectInputStream inputStream = new ObjectInputStream(new FileInputStream(new File(directory, CrfPosTaggerTrainer.SAVE_LOAD_FILE_NAME ))))
		{
			@SuppressWarnings("unchecked")
// Path: src/main/java/com/asher_stern/crf/crf/CrfModel.java
// public class CrfModel<K,G> implements Serializable // K = token, G = tag
// {
// 	private static final long serialVersionUID = -5703467522848303660L;
// 	
// 	public CrfModel(CrfTags<G> crfTags, CrfFeaturesAndFilters<K, G> features, ArrayList<BigDecimal> parameters)
// 	{
// 		super();
// 		this.crfTags = crfTags;
// 		this.features = features;
// 		this.parameters = parameters;
// 	}
// 	
// 	
// 	
// 	public CrfTags<G> getCrfTags()
// 	{
// 		return crfTags;
// 	}
// 	public CrfFeaturesAndFilters<K, G> getFeatures()
// 	{
// 		return features;
// 	}
// 	public ArrayList<BigDecimal> getParameters()
// 	{
// 		return parameters;
// 	}
// 
// 
// 
// 	private final CrfTags<G> crfTags;
// 	private final CrfFeaturesAndFilters<K, G> features;
// 	private final ArrayList<BigDecimal> parameters;
// }
// 
// Path: src/main/java/com/asher_stern/crf/crf/run/CrfInferencePerformer.java
// public class CrfInferencePerformer<K, G>
// {
// 	public CrfInferencePerformer(CrfModel<K, G> model)
// 	{
// 		super();
// 		this.model = model;
// 	}
// 
// 	/**
// 	 * Finds the most likely sequence of tags for the given sequence of tokens
// 	 * @param sequence A sequence of tokens
// 	 * @return A list in which each element is a {@link TaggedToken}, which encapsulates a token and its tag.
// 	 */
// 	public List<TaggedToken<K,G>> tagSequence(List<K> sequence)
// 	{
// 		if (null==sequence) {return null;}
// 		if (sequence.size()==0) {return Collections.<TaggedToken<K,G>>emptyList();}
// 		
// 		@SuppressWarnings("unchecked")
// 		K[] sentenceAsArray = sequence.toArray( (K[]) Array.newInstance(sequence.get(0).getClass(), sequence.size()) );
// 		CrfInferenceViterbi<K, G> crfInference = new CrfInferenceViterbi<K, G>(model, sentenceAsArray);
// 		G[] bestTags = crfInference.inferBestTagSequence();
// 
// 		if (sentenceAsArray.length!=bestTags.length) {throw new CrfException("Inference failed. Array of tags differs in length from array of tokens.");}
// 		
// 		List<TaggedToken<K,G>> ret = new ArrayList<TaggedToken<K,G>>();
// 		for (int index=0;index<sentenceAsArray.length;++index)
// 		{
// 			ret.add(new TaggedToken<K,G>(sentenceAsArray[index], bestTags[index]));
// 		}
// 		return ret;
// 
// 	}
// 
// 	private final CrfModel<K, G> model;
// }
// 
// Path: src/main/java/com/asher_stern/crf/postagging/postaggers/PosTaggerLoader.java
// public interface PosTaggerLoader
// {
// 	/**
// 	 * Load the {@link PosTagger} from the file-system and return it.
// 	 * @param directory A directory in the file-system which contains the model of the {@link PosTagger}.
// 	 * This model was earlier created and saved by {@link PosTaggerTrainer#save(File)}.
// 	 *  
// 	 * @return
// 	 */
// 	public PosTagger load(File directory);
// 
// }
// 
// Path: src/main/java/com/asher_stern/crf/utilities/CrfException.java
// public class CrfException extends RuntimeException
// {
// 	private static final long serialVersionUID = 5414394233000815286L;
// 
// 	public CrfException()
// 	{
// 		super();
// 	}
// 
// 	public CrfException(String message, Throwable cause,
// 			boolean enableSuppression, boolean writableStackTrace)
// 	{
// 		super(message, cause, enableSuppression, writableStackTrace);
// 	}
// 
// 	public CrfException(String message, Throwable cause)
// 	{
// 		super(message, cause);
// 	}
// 
// 	public CrfException(String message)
// 	{
// 		super(message);
// 	}
// 
// 	public CrfException(Throwable cause)
// 	{
// 		super(cause);
// 	}
// 	
// 
// }


// Path: src/main/java/com/asher_stern/crf/postagging/postaggers/crf/CrfPosTaggerLoader.java
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import com.asher_stern.crf.crf.CrfModel;
import com.asher_stern.crf.crf.run.CrfInferencePerformer;
import com.asher_stern.crf.postagging.postaggers.PosTaggerLoader;
import com.asher_stern.crf.utilities.CrfException;

package com.asher_stern.crf.postagging.postaggers.crf;



/**
 * Loads a {@link CrfPosTagger} from a model that is stored in a directory in the file-system.
 * The model was earlier saved in the file-system by {@link CrfPosTaggerTrainer#save(File)}.
 * 
 * @author Asher Stern
 * Date: Nov 20, 2014
 *
 */
public class CrfPosTaggerLoader implements PosTaggerLoader
{
	/*
	 * (non-Javadoc)
	 * @see org.postagging.postaggers.PosTaggerLoader#load(java.io.File)
	 */
	@Override
	public CrfPosTagger load(File directory)
	{
		if (!directory.exists()) {throw new CrfException("Given directory: "+directory.getAbsolutePath()+" does not exist.");}
		if (!directory.isDirectory()) {throw new CrfException("The loader requires a directory, but was provided with a file: "+directory.getAbsolutePath()+".");}
		
		try(ObjectInputStream inputStream = new ObjectInputStream(new FileInputStream(new File(directory, CrfPosTaggerTrainer.SAVE_LOAD_FILE_NAME ))))
		{
			@SuppressWarnings("unchecked")
			CrfModel<String, String> model = (CrfModel<String, String>) inputStream.readObject();