IndependentRandomAccessSource.java

/*
 * $Id: 5e9a0b9b1f0f5a7540f1c2f0a481b60647469389 $
 *
 * This file is part of the iText (R) project.
 * Copyright (c) 1998-2016 iText Group NV
 * Authors: Kevin Day, Bruno Lowagie, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
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package com.itextpdf.text.io;

import java.io.IOException;

/**
 * A RandomAccessSource that is wraps another RandomAccessSouce but does not propagate close().  This is useful when
 * passing a RandomAccessSource to a method that would normally close the source.
 * @since 5.3.5
 */
public class IndependentRandomAccessSource implements RandomAccessSource {
	/**
	 * The source
	 */
	private final RandomAccessSource source;
	
	
	/**
	 * Constructs a new OffsetRandomAccessSource
	 * @param source the source
	 */
	public IndependentRandomAccessSource(RandomAccessSource source) {
		this.source = source;
	}

	/**
	 * {@inheritDoc}
	 */
	public int get(long position) throws IOException {
		return source.get(position);
	}

	/**
	 * {@inheritDoc}
	 */
	public int get(long position, byte[] bytes, int off, int len) throws IOException {
		return source.get(position, bytes, off, len);
	}

	/**
	 * {@inheritDoc}
	 */
	public long length() {
		return source.length();
	}

	/**
	 * Does nothing - the underlying source is not closed
	 */
	public void close() throws IOException {
		// do not close the source
	}

}