/*
* 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.ctakes.assertion.cr;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import org.apache.uima.cas.CAS;
import org.apache.uima.cas.impl.XmiCasDeserializer;
import org.apache.uima.collection.CollectionException;
import org.apache.uima.collection.CollectionReader_ImplBase;
import org.apache.uima.resource.ResourceConfigurationException;
import org.apache.uima.resource.ResourceInitializationException;
import org.apache.uima.util.Progress;
import org.apache.uima.util.ProgressImpl;
import org.xml.sax.SAXException;
/**
* A simple collection reader that reads CASes in XMI format from a directory in the filesystem.
*/
public class XmiCollectionReaderCtakes extends CollectionReader_ImplBase {
/**
* Name of configuration parameter that must be set to the path of a directory containing the XMI
* files.
*/
public static final String PARAM_INPUTDIR = "InputDirectory";
/**
* Name of the configuration parameter that must be set to indicate if the
* execution fails if an encountered type is unknown
*/
public static final String PARAM_FAILUNKNOWN = "FailOnUnknownType";
private Boolean mFailOnUnknownType;
private ArrayList mFiles;
private int mCurrentIndex;
/**
* @see org.apache.uima.collection.CollectionReader_ImplBase#initialize()
*/
public void initialize() throws ResourceInitializationException {
mFailOnUnknownType = (Boolean) getConfigParameterValue(PARAM_FAILUNKNOWN);
if (null == mFailOnUnknownType) {
mFailOnUnknownType = true; // default to true if not specified
}
File directory = new File(((String) getConfigParameterValue(PARAM_INPUTDIR)).trim());
mCurrentIndex = 0;
// if input directory does not exist or is not a directory, throw exception
if (!directory.exists() || !directory.isDirectory()) {
throw new ResourceInitializationException(ResourceConfigurationException.DIRECTORY_NOT_FOUND,
new Object[] { PARAM_INPUTDIR, this.getMetaData().getName(), directory.getPath() });
}
// get list of .xmi files in the specified directory
mFiles = new ArrayList();
File[] files = directory.listFiles();
for (int i = 0; i < files.length; i++) {
if (!files[i].isDirectory() && files[i].getName().endsWith(".xmi")) {
mFiles.add(files[i]);
}
}
}
/**
* @see org.apache.uima.collection.CollectionReader#hasNext()
*/
public boolean hasNext() {
return mCurrentIndex < mFiles.size();
}
/**
* @see org.apache.uima.collection.CollectionReader#getNext(org.apache.uima.cas.CAS)
*/
public void getNext(CAS aCAS) throws IOException, CollectionException {
File currentFile = (File) mFiles.get(mCurrentIndex++);
FileInputStream inputStream = new FileInputStream(currentFile);
try {
XmiCasDeserializer.deserialize(inputStream, aCAS, ! mFailOnUnknownType);
} catch (SAXException e) {
throw new CollectionException(e);
} finally {
inputStream.close();
}
}
/**
* @see org.apache.uima.collection.base_cpm.BaseCollectionReader#close()
*/
public void close() throws IOException {
}
/**
* @see org.apache.uima.collection.base_cpm.BaseCollectionReader#getProgress()
*/
public Progress[] getProgress() {
return new Progress[] { new ProgressImpl(mCurrentIndex, mFiles.size(), Progress.ENTITIES) };
}
}