/*
* Copyright 2016
* Ubiquitous Knowledge Processing (UKP) Lab
* Technische Universität Darmstadt
*
* 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 de.tudarmstadt.ukp.dkpro.core.lbj;
import static org.apache.uima.fit.util.JCasUtil.select;
import static org.apache.uima.fit.util.JCasUtil.selectCovered;
import java.io.IOException;
import java.net.URL;
import java.util.List;
import org.apache.commons.lang3.reflect.FieldUtils;
import org.apache.uima.UimaContext;
import org.apache.uima.analysis_engine.AnalysisEngineProcessException;
import org.apache.uima.cas.CAS;
import org.apache.uima.fit.component.JCasAnnotator_ImplBase;
import org.apache.uima.fit.descriptor.ConfigurationParameter;
import org.apache.uima.fit.descriptor.TypeCapability;
import org.apache.uima.jcas.JCas;
import org.apache.uima.resource.ResourceInitializationException;
import de.tudarmstadt.ukp.dkpro.core.api.metadata.SingletonTagset;
import de.tudarmstadt.ukp.dkpro.core.api.parameter.ComponentParameters;
import de.tudarmstadt.ukp.dkpro.core.api.resources.MappingProvider;
import de.tudarmstadt.ukp.dkpro.core.api.resources.ModelProviderBase;
import de.tudarmstadt.ukp.dkpro.core.api.segmentation.type.Sentence;
import de.tudarmstadt.ukp.dkpro.core.api.segmentation.type.Token;
import de.tudarmstadt.ukp.dkpro.core.api.syntax.type.chunk.Chunk;
import de.tudarmstadt.ukp.dkpro.core.lbj.internal.ConvertToIllinois;
import de.tudarmstadt.ukp.dkpro.core.lbj.internal.ConvertToUima;
import edu.illinois.cs.cogcomp.annotation.Annotator;
import edu.illinois.cs.cogcomp.annotation.AnnotatorException;
import edu.illinois.cs.cogcomp.chunker.main.ChunkerAnnotator;
import edu.illinois.cs.cogcomp.chunker.main.lbjava.Chunker;
import edu.illinois.cs.cogcomp.core.datastructures.textannotation.TextAnnotation;
/**
* Wrapper for the Illinois chunker from the Cognitive Computation Group (CCG).
*/
@TypeCapability(
inputs = {
"de.tudarmstadt.ukp.dkpro.core.api.lexmorph.type.pos.POS",
"de.tudarmstadt.ukp.dkpro.core.api.segmentation.type.Token",
"de.tudarmstadt.ukp.dkpro.core.api.segmentation.type.Sentence" },
outputs = {
"de.tudarmstadt.ukp.dkpro.core.api.syntax.type.chunk.Chunk" })
public class IllinoisChunker
extends JCasAnnotator_ImplBase
{
/**
* Use the {@link String#intern()} method on tags. This is usually a good idea to avoid
* spaming the heap with thousands of strings representing only a few different tags.
*
* Default: {@code true}
*/
public static final String PARAM_INTERN_TAGS = ComponentParameters.PARAM_INTERN_TAGS;
@ConfigurationParameter(name = PARAM_INTERN_TAGS, mandatory = false, defaultValue = "true")
private boolean internTags;
/**
* Log the tag set(s) when a model is loaded.
*
* Default: {@code false}
*/
public static final String PARAM_PRINT_TAGSET = ComponentParameters.PARAM_PRINT_TAGSET;
@ConfigurationParameter(name = PARAM_PRINT_TAGSET, mandatory = true, defaultValue="false")
protected boolean printTagSet;
// public static final String PARAM_MODEL_LOCATION = ComponentParameters.PARAM_MODEL_LOCATION;
// @ConfigurationParameter(name = PARAM_MODEL_LOCATION, mandatory = false)
// private String modelLocation;
public static final String PARAM_LANGUAGE = ComponentParameters.PARAM_LANGUAGE;
@ConfigurationParameter(name = PARAM_LANGUAGE, mandatory = false)
private String language;
// public static final String PARAM_VARIANT = ComponentParameters.PARAM_VARIANT;
// @ConfigurationParameter(name = PARAM_VARIANT, mandatory = false)
// private String variant;
/**
* Load the chunk tag to UIMA type mapping from this location instead of locating
* the mapping automatically.
*/
public static final String PARAM_CHUNK_MAPPING_LOCATION = ComponentParameters.PARAM_CHUNK_MAPPING_LOCATION;
@ConfigurationParameter(name = PARAM_CHUNK_MAPPING_LOCATION, mandatory = false, defaultValue="classpath:/de/tudarmstadt/ukp/dkpro/core/api/syntax/tagset/en-conll2000-chunk.map")
protected String chunkMappingLocation;
private ModelProviderBase<Annotator> modelProvider;
private MappingProvider mappingProvider;
@Override
public void initialize(UimaContext context)
throws ResourceInitializationException
{
super.initialize(context);
modelProvider = new ModelProviderBase<Annotator>() {
{
setContextObject(IllinoisChunker.this);
setDefault(LOCATION, NOT_REQUIRED);
}
@Override
protected ChunkerAnnotator produceResource(URL aUrl) throws IOException
{
if (!"en".equals(getAggregatedProperties().getProperty(LANGUAGE))) {
throw new IllegalArgumentException("Only language [en] is supported");
}
ChunkerAnnotator annotator = new ChunkerAnnotator();
SingletonTagset tags = new SingletonTagset(Chunk.class, "conll2000");
try {
Chunker chunker = (Chunker) FieldUtils.readField(annotator, "tagger", true);
for (int i = 0; i < chunker.getLabelLexicon().size(); i++) {
String tag = chunker.getLabelLexicon().lookupKey(i).getStringValue();
// Strip BIO encoding from tagset
if (tag.length() > 1) {
tag = tag.substring(2);
tags.add(tag);
}
}
}
catch (IllegalAccessException e) {
throw new IllegalStateException(e);
}
addTagset(tags);
if (printTagSet) {
getLogger().info(getTagset().toString());
}
return annotator;
}
};
// mappingProvider = MappingProviderFactory.createChunkMappingProvider(chunkMappingLocation,
// language, modelProvider);
mappingProvider = new MappingProvider();
mappingProvider.setDefault(MappingProvider.LOCATION, chunkMappingLocation);
mappingProvider.setDefault(MappingProvider.BASE_TYPE, Chunk.class.getName());
}
@Override
public void process(JCas aJCas)
throws AnalysisEngineProcessException
{
CAS cas = aJCas.getCas();
modelProvider.configure(cas);
mappingProvider.configure(cas);
ConvertToIllinois converter = new ConvertToIllinois();
TextAnnotation document = converter.convert(aJCas);
// Run tagger
try {
modelProvider.getResource().getView(document);
}
catch (AnnotatorException e) {
throw new IllegalStateException(e);
}
for (Sentence s : select(aJCas, Sentence.class)) {
// Get tokens from CAS
List<Token> casTokens = selectCovered(aJCas, Token.class, s);
ConvertToUima.convertChunks(aJCas, casTokens, document, mappingProvider, internTags);
}
}
}