/*
* 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.caseditor.uima;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import org.apache.uima.cas.CAS;
import org.apache.uima.cas_data.CasData;
import org.apache.uima.caseditor.core.model.CorpusElement;
import org.apache.uima.caseditor.core.model.DocumentElement;
import org.apache.uima.collection.CollectionException;
import org.apache.uima.collection.CollectionReader_ImplBase;
import org.apache.uima.collection.impl.CasConverter;
import org.apache.uima.util.Progress;
import org.eclipse.core.runtime.CoreException;
/**
* This is a collection reader which reads the documents from a {@link Collection} of
* {@link CorpusElement}s.
*/
public class CorporaCollectionReader extends CollectionReader_ImplBase {
private Iterator<DocumentElement> documentIterator;
/**
* Sets the <code>CorpusElement</code>s to be read.
*
* @param corpora
*/
public void setCorpora(Collection<CorpusElement> corpora) {
if (corpora != null) {
List<DocumentElement> documents = new LinkedList<DocumentElement>();
for (CorpusElement element : corpora) {
documents.addAll(element.getDocuments());
}
documentIterator = documents.iterator();
}
}
/**
* Copies the next text with all annotation to the given cas object.
*
* @throws CollectionException -
*/
public void getNext(CAS cas) throws CollectionException {
DocumentElement document = documentIterator.next();
CAS documentCas = null;
try {
documentCas = document.getDocument(false).getCAS();
} catch (CoreException e) {
// TODO Handle this exception well
e.printStackTrace();
}
CasConverter converter = new CasConverter();
CasData documentData = converter.casContainerToCasData(documentCas);
converter.casDataToCasContainer(documentData, cas, true);
}
/**
* Checks if there is one more cas available.
*/
public boolean hasNext() {
if (documentIterator != null) {
return documentIterator.hasNext();
} else {
return false;
}
}
/**
* Currently not implemented
*
* @return Progress[] - just returns null
*/
public Progress[] getProgress() {
return new Progress[] {};
}
/**
* Currently not implemented
*/
public void close() {
// currently not implemented
}
}