/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.uima.lucas.indexer;
import java.text.DecimalFormat;
import java.text.Format;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.log4j.Logger;
import org.apache.uima.cas.CAS;
import org.apache.uima.jcas.JCas;
import org.apache.uima.lucas.indexer.analysis.AnnotationTokenStream;
import org.apache.uima.lucas.indexer.analysis.InvalidTokenSourceException;
import org.apache.uima.lucas.indexer.mapping.AnnotationDescription;
import org.apache.uima.lucas.indexer.mapping.FeatureDescription;
/**
* Builds annotation token streams wrapped with filters according to annotation descriptions.
*/
public class AnnotationTokenStreamBuilder {
private static final Logger LOGGER = Logger.getLogger(AnnotationTokenStreamBuilder.class);
public AnnotationTokenStream createAnnotationTokenStream(JCas jCas,
AnnotationDescription annotationDescription) throws AnnotationTokenStreamBuildingException {
String sofaName = annotationDescription.getSofa();
sofaName = sofaName == null ? CAS.NAME_DEFAULT_SOFA : sofaName;
// create tokenstream from annotations
AnnotationTokenStream annotationTokenStream = null;
String typeName = annotationDescription.getType();
if (annotationDescription.getFeatureDescriptions().size() == 0)
try {
annotationTokenStream = new AnnotationTokenStream(jCas, sofaName, typeName);
} catch (InvalidTokenSourceException e) {
throw createException(annotationDescription, e);
}
else {
String featurePath = annotationDescription.getFeaturePath();
String delimiter = annotationDescription.getFeatureValueDelimiterString();
Collection<FeatureDescription> featureDescriptions = annotationDescription.getFeatureDescriptions();
List<String> featureNames = extractFeatureNames(featureDescriptions);
Map<String, Format> featureFormats = extractFeatureFormats(featureDescriptions);
if (featurePath != null)
try {
annotationTokenStream = new AnnotationTokenStream(jCas, sofaName, typeName, featurePath,
featureNames, delimiter, featureFormats);
} catch (InvalidTokenSourceException e) {
throw createException(annotationDescription, e);
}
else
try {
annotationTokenStream = new AnnotationTokenStream(jCas, sofaName, typeName, featureNames,
delimiter, featureFormats);
} catch (InvalidTokenSourceException e) {
throw createException(annotationDescription, e);
}
}
return annotationTokenStream;
}
private List<String> extractFeatureNames(Collection<FeatureDescription> featureDescriptions){
List<String> featureNames = new ArrayList<String>();
for (FeatureDescription featureDescription : featureDescriptions) {
featureNames.add(featureDescription.getFeatureName());
}
return featureNames;
}
private Map<String, Format> extractFeatureFormats(Collection<FeatureDescription> featureDescriptions){
Map<String, Format> featureFormats = new HashMap<String, Format>();
for (FeatureDescription featureDescription : featureDescriptions) {
if (featureDescription.getNumberFormat() != null) {
Format format = new DecimalFormat(featureDescription.getNumberFormat());
featureFormats.put(featureDescription.getFeatureName(), format);
}
}
return featureFormats;
}
private AnnotationTokenStreamBuildingException createException(AnnotationDescription annotationDescription,
InvalidTokenSourceException e) {
String message = "Can't build TokenStream from annotation at line " +
annotationDescription.getLineNumber();
return new AnnotationTokenStreamBuildingException(message, e);
}
}