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co.cask.cdap.common.io.SeekableInputStream Maven / Gradle / Ivy
/*
* Copyright © 2014-2015 Cask Data, Inc.
*
* Licensed 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 co.cask.cdap.common.io;
import org.apache.hadoop.fs.Seekable;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
/**
* Abstract base class for {@link InputStream} that implements the {@link Seekable} interface.
*/
public abstract class SeekableInputStream extends FilterInputStream implements Seekable {
/**
* Returns the current size of the input stream or -1 if the size is unknown.
*
* @return size of the input stream in bytes
* @throws IOException if failed to determine the size
*/
public abstract long size() throws IOException;
protected SeekableInputStream(InputStream in) {
super(in);
}
}