01: /*
02: (c) Copyright 2005, 2006, 2007, 2008 Hewlett-Packard Development Company, LP
03: All rights reserved - see end of file.
04: $Id: ModelGetter.java,v 1.5 2008/01/02 12:05:48 andy_seaborne Exp $
05: */
06:
07: package com.hp.hpl.jena.rdf.model;
08:
09: /**
10: A ModelGetter object can retrieve a Model given a URL for it. If it doesn't
11: have such a Model, it returns null.
12: <p>
13: ModelGetters are very weakly constrained. They need not contain any
14: models at all; they may forget models they have just delivered; they may
15: deliver different models given the same URL. They <i>are</i> constrained to
16: deliver an "appropriate" model for the URL, however - whatever they return
17: should be strongly related to the RDF which might, at some time or another,
18: be retrieved from that URL.
19:
20: @author kers
21: */
22: public interface ModelGetter {
23: /**
24: Answer a Model whose content is that associated with the URL, if possible,
25: and otherwise answer null.
26: */
27: public Model getModel(String URL);
28:
29: /**
30: Answer a model appropriate for <code>URL</code>, If none is to hand,
31: and it's possible to create one, create it and load it using <code>loadIfAbsent</code>.
32: Otherwise throw CannotCreateException. This method never returns null.
33: */
34: public Model getModel(String URL, ModelReader loadIfAbsent);
35: }
36:
37: /*
38: * (c) Copyright 2005, 2006, 2007, 2008 Hewlett-Packard Development Company, LP
39: * All rights reserved.
40: *
41: * Redistribution and use in source and binary forms, with or without
42: * modification, are permitted provided that the following conditions
43: * are met:
44: * 1. Redistributions of source code must retain the above copyright
45: * notice, this list of conditions and the following disclaimer.
46: * 2. Redistributions in binary form must reproduce the above copyright
47: * notice, this list of conditions and the following disclaimer in the
48: * documentation and/or other materials provided with the distribution.
49: * 3. The name of the author may not be used to endorse or promote products
50: * derived from this software without specific prior written permission.
51: *
52: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
53: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
54: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
55: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
56: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
57: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
58: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
59: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
60: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
61: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62: */
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