01: /**********************************************************************************
02: * $URL: $
03: * $Id: $
04: ***********************************************************************************
05: *
06: * Copyright (c) 2003, 2004, 2005, 2006 The Sakai Foundation.
07: *
08: * Licensed under the Educational Community License, Version 1.0 (the "License");
09: * you may not use this file except in compliance with the License.
10: * You may obtain a copy of the License at
11: *
12: * http://www.opensource.org/licenses/ecl1.php
13: *
14: * Unless required by applicable law or agreed to in writing, software
15: * distributed under the License is distributed on an "AS IS" BASIS,
16: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17: * See the License for the specific language governing permissions and
18: * limitations under the License.
19: *
20: **********************************************************************************/package org.sakaiproject.component.osid.repository.registry;
21:
22: /**
23: * <p>
24: * AssetIterator implements an interface with that name in the Repository OSID.
25: * </p>
26: *
27: * @author Massachusetts Institute of Technology
28: * @version $Id: PresenceTool.java 632 2005-07-14 21:22:50Z janderse@umich.edu $
29: */
30: public class AssetIterator implements org.osid.repository.AssetIterator {
31: java.util.Iterator mIterator = null;
32:
33: /**
34: * Store away what we will return piecemeal.
35: */
36: protected AssetIterator(java.util.Vector vector)
37: throws org.osid.repository.RepositoryException {
38: mIterator = vector.iterator();
39: }
40:
41: /**
42: * Return whether there is another Asset or not.
43: */
44: public boolean hasNextAsset()
45: throws org.osid.repository.RepositoryException {
46: try {
47: return mIterator.hasNext();
48: } catch (Exception ex) {
49: throw new org.osid.repository.RepositoryException(
50: org.osid.OsidException.OPERATION_FAILED);
51: }
52: }
53:
54: /**
55: * Return the next Asset or throw an exception if there are no more Assets.
56: * The exception's message is: org.osid.shared.SharedException.NO_MORE_ITERATOR_ELEMENTS
57: */
58: public org.osid.repository.Asset nextAsset()
59: throws org.osid.repository.RepositoryException {
60: try {
61: return (org.osid.repository.Asset) mIterator.next();
62: } catch (java.util.NoSuchElementException e) {
63: throw new org.osid.repository.RepositoryException(
64: org.osid.shared.SharedException.NO_MORE_ITERATOR_ELEMENTS);
65: }
66: }
67: }
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