01: package org.xmldb.api.base;
02:
03: /*
04: * The XML:DB Initiative Software License, Version 1.0
05: *
06: *
07: * Copyright (c) 2000-2001 The XML:DB Initiative. All rights
08: * reserved.
09: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: *
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: *
17: * 2. Redistributions in binary form must reproduce the above copyright
18: * notice, this list of conditions and the following disclaimer in
19: * the documentation and/or other materials provided with the
20: * distribution.
21: *
22: * 3. The end-user documentation included with the redistribution,
23: * if any, must include the following acknowledgment:
24: * "This product includes software developed by the
25: * XML:DB Initiative (http://www.xmldb.org/)."
26: * Alternately, this acknowledgment may appear in the software itself,
27: * if and wherever such third-party acknowledgments normally appear.
28: *
29: * 4. The name "XML:DB Initiative" must not be used to endorse or
30: * promote products derived from this software without prior written
31: * permission. For written permission, please contact info@xmldb.org.
32: *
33: * 5. Products derived from this software may not be called "XML:DB",
34: * nor may "XML:DB" appear in their name, without prior written
35: * permission of the XML:DB Initiative.
36: *
37: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48: * SUCH DAMAGE.
49: * ====================================================================
50: *
51: * This software consists of voluntary contributions made by many
52: * individuals on behalf of the XML:DB Initiative. For more information
53: * on the XML:DB Initiative, please see <http://www.xmldb.org/>.
54: */
55:
56: /**
57: * ResourceIterator is used to iterate over a set of resources.
58: */
59: public interface ResourceIterator {
60: /**
61: * Returns true as long as there are still more resources to be iterated.
62: *
63: * @return true if there are more resources to iterate, false otherwise.
64: * @exception XMLDBException with expected error codes.<br />
65: * <code>ErrorCodes.VENDOR_ERROR</code> for any vendor
66: * specific errors that occur.<br />
67: */
68: boolean hasMoreResources() throws XMLDBException;
69:
70: /**
71: * Returns the next <code>Resource</code> instance in the iterator.
72: *
73: * @return the next <code>Resource</code> instance in the iterator.
74: * @exception XMLDBException with expected error codes.<br />
75: * <code>ErrorCodes.VENDOR_ERROR</code> for any vendor
76: * specific errors that occur.<br />
77: * <code>ErrorCodes.NO_SUCH_RESOURCE</code> if the resource iterator is
78: * empty or all resources have already been retrieved.
79: */
80: Resource nextResource() throws XMLDBException;
81: }
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