/*
* 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.pig.piggybank.storage.avro;
import java.io.Closeable;
import java.io.IOException;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.avro.file.SeekableInput;
/** Adapt an {@link FSDataInputStream} to {@link SeekableInput}. */
public class AvroStorageInputStream implements Closeable, SeekableInput {
private final FSDataInputStream stream;
private final long len;
/** Construct given a path and a configuration. */
public AvroStorageInputStream(Path path, TaskAttemptContext context) throws IOException {
this.stream = path.getFileSystem(context.getConfiguration()).open(path);
this.len = path.getFileSystem(context.getConfiguration()).getFileStatus(path).getLen();
}
public long length() {
return len;
}
public int read(byte[] b, int off, int len) throws IOException {
return stream.read(b, off, len);
}
public void seek(long p) throws IOException {
stream.seek(p);
}
public long tell() throws IOException {
return stream.getPos();
}
public void close() throws IOException {
stream.close();
}
}