fiftyone.mobile.detection.entities.stream.TrieSource Maven / Gradle / Ivy
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package fiftyone.mobile.detection.entities.stream;
import fiftyone.mobile.detection.IDisposable;
import fiftyone.mobile.detection.readers.TrieReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
/* *********************************************************************
* This Source Code Form is copyright of 51Degrees Mobile Experts Limited.
* Copyright 2014 51Degrees Mobile Experts Limited, 5 Charlotte Close,
* Caversham, Reading, Berkshire, United Kingdom RG4 7BY
*
* This Source Code Form is the subject of the following patent
* applications, owned by 51Degrees Mobile Experts Limited of 5 Charlotte
* Close, Caversham, Reading, Berkshire, United Kingdom RG4 7BY:
* European Patent Application No. 13192291.6; and
* United States Patent Application Nos. 14/085,223 and 14/085,301.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0.
*
* If a copy of the MPL was not distributed with this file, You can obtain
* one at http://mozilla.org/MPL/2.0/.
*
* This Source Code Form is "Incompatible With Secondary Licenses", as
* defined by the Mozilla Public License, v. 2.0.
* ********************************************************************* */
/**
* Encapsulates either a byte array or a file containing the uncompressed data
* structures used by the data set. Must be disposed to ensure that the
* readers are closed and the file free for other uses. Does not need to be
* disposed if a byte array is used.
*/
public class TrieSource implements IDisposable {
private final FileInputStream fileInputStream;
public TrieSource(String filename, boolean isTempFile) throws FileNotFoundException {
fileInputStream = new FileInputStream(filename);
}
@Override
public void dispose() {
try {
fileInputStream.close();
} catch (IOException ex) {
// Nothing we can do at this point. Ignore.
}
}
/**
* Creates a new reader and stores a reference to it.
*
* @return A reader open for read access to the stream
* @throws java.io.IOException indicates an I/O exception occurred
*/
public synchronized TrieReader createReader() throws IOException {
return new TrieReader(fileInputStream.getChannel());
}
}