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/*
* Copyright (C) 2008-2009, Google Inc.
* Copyright (C) 2008, Jonas Fonseca <fonseca@diku.dk>
* Copyright (C) 2008, Marek Zawirski <marek.zawirski@gmail.com>
* Copyright (C) 2007, Robin Rosenberg <robin.rosenberg@dewire.com>
* Copyright (C) 2006-2008, Shawn O. Pearce <spearce@spearce.org>
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* - Neither the name of the Eclipse Foundation, Inc. nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.eclipse.jgit.lib;
/**
* Base class for a set of loaders for different representations of Git objects.
* New loaders are constructed for every object.
*/
public abstract class ObjectLoader {
/**
* @return Git in pack object type, see {@link Constants}.
*/
public abstract int getType();
/**
* @return size of object in bytes
*/
public abstract long getSize();
/**
* Obtain a copy of the bytes of this object.
* <p>
* Unlike {@link #getCachedBytes()} this method returns an array that might
* be modified by the caller.
*
* @return the bytes of this object.
*/
public final byte[] getBytes() {
final byte[] data = getCachedBytes();
final byte[] copy = new byte[data.length];
System.arraycopy(data, 0, copy, 0, data.length);
return copy;
}
/**
* Obtain a reference to the (possibly cached) bytes of this object.
* <p>
* This method offers direct access to the internal caches, potentially
* saving on data copies between the internal cache and higher level code.
* Callers who receive this reference <b>must not</b> modify its contents.
* Changes (if made) will affect the cache but not the repository itself.
*
* @return the cached bytes of this object. Do not modify it.
*/
public abstract byte[] getCachedBytes();
}
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