/* | |
* 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.examples.xmi; | |
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 XmiCollectionReader 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) }; | |
} | |
} |