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170f945d0b
git-svn-id: http://scm.dspace.org/svn/repo/dspace/trunk@5534 9c30dcfa-912a-0410-8fc2-9e0234be79fd
108 lines
3.2 KiB
Java
108 lines
3.2 KiB
Java
/*
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* Copyright (c) 2002-2009, The DSpace Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of the DSpace Foundation nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*/
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package org.dspace.checker;
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import org.dspace.core.PluginManager;
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/**
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* Decorator that dispatches a specified number of bitstreams from a delegate
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* dispatcher.
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*
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* @author Jim Downing
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* @author Grace Carpenter
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* @author Nathan Sarr
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*
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*/
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public class LimitedCountDispatcher implements BitstreamDispatcher
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{
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/** The remaining number of bitstreams to iterate through. */
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private int remaining = 1;
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/** The dispatcher to delegate to for retrieving bitstreams. */
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private BitstreamDispatcher delegate = null;
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/**
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* Default constructor uses PluginManager
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*/
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public LimitedCountDispatcher()
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{
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this((BitstreamDispatcher) PluginManager
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.getSinglePlugin(BitstreamDispatcher.class));
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}
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/**
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* Constructor.
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*
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* @param del
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* The bitstream distpatcher to delegate to.
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* @param count
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* the number of bitstreams to check.
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*/
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public LimitedCountDispatcher(BitstreamDispatcher del, int count)
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{
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this(del);
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remaining = count;
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}
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/**
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* Constructor.
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*
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* @param del
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* The bitstream distpatcher to delegate to.
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*/
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public LimitedCountDispatcher(BitstreamDispatcher del)
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{
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delegate = del;
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}
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/**
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* Retreives the next bitstream to be checked.
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*
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* @return the bitstream id
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* @throws SQLException
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* if database error occurs.
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*/
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public int next()
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{
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if (remaining > 0)
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{
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remaining--;
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return delegate.next();
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}
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else
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{
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return BitstreamDispatcher.SENTINEL;
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}
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}
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}
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