opennlp.tools.formats.convert.FileToByteArraySampleStream Maven / Gradle / Ivy
/*
* 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 opennlp.tools.formats.convert;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import opennlp.tools.commons.Internal;
import opennlp.tools.util.FilterObjectStream;
import opennlp.tools.util.ObjectStream;
/**
* Note:
* Do not use this class, internal use only!
*/
@Internal
public class FileToByteArraySampleStream extends FilterObjectStream {
/**
* Initializes a {@link FileToByteArraySampleStream}.
*
* @param samples The {@link ObjectStream} containing the files.
*/
public FileToByteArraySampleStream(ObjectStream samples) {
super(samples);
}
private static byte[] readFile(File file) throws IOException {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
try (InputStream in = new BufferedInputStream(new FileInputStream(file))) {
byte[] buffer = new byte[1024];
int length;
while ((length = in.read(buffer, 0, buffer.length)) > 0) {
bytes.write(buffer, 0, length);
}
}
return bytes.toByteArray();
}
@Override
public byte[] read() throws IOException {
File sampleFile = samples.read();
if (sampleFile != null) {
return readFile(sampleFile);
}
else {
return null;
}
}
}