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Java example source code file (UimaTokenizerFactory.java)

This example Java source code file (UimaTokenizerFactory.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

analysisengine, illegalargumentexception, override, resourceinitializationexception, runtimeexception, tokenizer, tokenpreprocess, uimaresource, uimatokenizerfactory, unable, unsupportedoperationexception

The UimaTokenizerFactory.java Java example source code

/*
 *
 *  * Copyright 2015 Skymind,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.
 *
 */

package org.deeplearning4j.text.tokenization.tokenizerfactory;

import java.io.InputStream;

import org.apache.uima.analysis_engine.AnalysisEngine;
import org.apache.uima.fit.factory.AnalysisEngineFactory;
import org.apache.uima.resource.ResourceInitializationException;
import org.deeplearning4j.text.annotator.SentenceAnnotator;
import org.deeplearning4j.text.annotator.TokenizerAnnotator;
import org.deeplearning4j.text.tokenization.tokenizer.TokenPreProcess;
import org.deeplearning4j.text.tokenization.tokenizer.Tokenizer;
import org.deeplearning4j.text.tokenization.tokenizer.UimaTokenizer;
import org.deeplearning4j.text.uima.UimaResource;


/**
 * Uses a uima {@link AnalysisEngine} to 
 * tokenize text.
 *
 *
 * @author Adam Gibson
 *
 */
public class UimaTokenizerFactory implements TokenizerFactory {

	private UimaResource uimaResource;
	private boolean checkForLabel;
	private static AnalysisEngine defaultAnalysisEngine;
	private TokenPreProcess preProcess;

	public UimaTokenizerFactory() throws ResourceInitializationException {
		this(defaultAnalysisEngine(),true);
	}

	public UimaTokenizerFactory(UimaResource resource) {
		this(resource,true);
	}

	public UimaTokenizerFactory(AnalysisEngine tokenizer) {
		this(tokenizer,true);
	}

	public UimaTokenizerFactory(UimaResource resource,boolean checkForLabel) {
		this.uimaResource = resource;
		this.checkForLabel = checkForLabel;
	}

	public UimaTokenizerFactory(boolean checkForLabel) throws ResourceInitializationException {
		this(defaultAnalysisEngine(),checkForLabel);
	}

	public UimaTokenizerFactory(AnalysisEngine tokenizer,boolean checkForLabel) {
		super();
		this.checkForLabel = checkForLabel;
		try {
			this.uimaResource = new UimaResource(tokenizer);
		}catch(Exception e) {
			throw new RuntimeException(e);
		}
	}

	@Override
	public  Tokenizer create(String toTokenize) {
		if(toTokenize == null)
			throw new IllegalArgumentException("Unable to proceed; on sentence to tokenize");
		Tokenizer ret = new UimaTokenizer(toTokenize,uimaResource,checkForLabel);
		ret.setTokenPreProcessor(preProcess);
		return ret;
	}

	public UimaResource getUimaResource() {
		return uimaResource;
	}


	/**
	 * Creates a tokenization,/stemming pipeline
	 * @return a tokenization/stemming pipeline
	 */
	public static AnalysisEngine defaultAnalysisEngine()  {
		try {
			if(defaultAnalysisEngine == null)
				defaultAnalysisEngine =  AnalysisEngineFactory.createEngine(
						AnalysisEngineFactory.createEngineDescription(
								SentenceAnnotator.getDescription(),
								TokenizerAnnotator.getDescription()));

			return defaultAnalysisEngine;
		}catch(Exception e) {
			throw new RuntimeException(e);
		}
	}


	@Override
	public Tokenizer create(InputStream toTokenize) {
		throw new UnsupportedOperationException();
	}

	@Override
	public void setTokenPreProcessor(TokenPreProcess preProcessor) {
		this.preProcess = preProcessor;
	}

	/**
	 * Returns TokenPreProcessor set for this TokenizerFactory instance
	 *
	 * @return TokenPreProcessor instance, or null if no preprocessor was defined
	 */
	@Override
	public TokenPreProcess getTokenPreProcessor() {
		return preProcess;
	}


}

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