com.signalfx.shaded.apache.commons.io.RandomAccessFiles 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 com.signalfx.shaded.apache.commons.io;
import java.io.IOException;
import java.io.RandomAccessFile;
/**
* Works on RandomAccessFile.
*
* @since 2.13.0
*/
public class RandomAccessFiles {
/**
* Reads a byte array starting at "position" for "length" bytes.
*
* @param input The source RandomAccessFile.
* @param position The offset position, measured in bytes from the beginning of the file, at which to set the file pointer.
* @param length How many bytes to read.
* @return a new byte array.
* @throws IOException If the first byte cannot be read for any reason other than end of file, or if the random access file has been closed, or if some
* other I/O error occurs.
*/
public static byte[] read(final RandomAccessFile input, final long position, final int length) throws IOException {
input.seek(position);
return IOUtils.toByteArray(input::read, length);
}
}