1 //
2 // Copyright (c) 2003, 2004, Caltha - Gajda, Krzewski, Mach, Potempski Sp.J.
3 // All rights reserved.
4 //
5 // Redistribution and use in source and binary forms, with or without modification,
6 // are permitted provided that the following conditions are met:
7 //
8 // * Redistributions of source code must retain the above copyright notice,
9 // this list of conditions and the following disclaimer.
10 // * Redistributions in binary form must reproduce the above copyright notice,
11 // this list of conditions and the following disclaimer in the documentation
12 // and/or other materials provided with the distribution.
13 // * Neither the name of the Caltha - Gajda, Krzewski, Mach, Potempski Sp.J.
14 // nor the names of its contributors may be used to endorse or promote products
15 // derived from this software without specific prior written permission.
16 //
17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 // IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
21 // INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
22 // BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
23 // OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 // POSSIBILITY OF SUCH DAMAGE.
27 //
28 package org.objectledge.datatype;
29
30 /***
31 * Common base class for DatatypeSet implementations.
32 *
33 * @author <a href="mailto:dgajda@caltha.pl">Damian Gajda</a>
34 * @version $Id: AbstractDatatypeSet.java,v 1.2 2004/12/27 04:43:22 rafal Exp $
35 */
36 public abstract class AbstractDatatypeSet implements DatatypeSet
37 {
38 /*** Name of this datatype set. */
39 protected String name;
40
41 /*** Parent of this datatype set. */
42 protected DatatypeSet parent;
43
44 /***
45 * Creates a datatype set with a given name.
46 *
47 * @param name name of the set.
48 */
49 public AbstractDatatypeSet(String name)
50 {
51 this.name = name;
52 }
53
54 // DatatypeSet API ----------------------------------------------------------------------------
55
56 /***
57 * {@inheritDoc}
58 */
59 public String getName()
60 {
61 return name;
62 }
63
64 /***
65 * {@inheritDoc}
66 */
67 public Datatype getDatatype(String name)
68 {
69 Datatype datatype = this.getDatatypeInternal(name);
70 if(datatype == null && parent != null)
71 {
72 return parent.getDatatype(name);
73 }
74 return datatype;
75 }
76
77 // NonPublic API -----------------------------------------------------------------------------
78
79 DatatypeSet getParent()
80 {
81 return parent;
82 }
83
84 void setParent(DatatypeSet parent)
85 {
86 this.parent = parent;
87 }
88
89 // Override API ------------------------------------------------------------------------------
90
91 /***
92 * Internal method for getting datatypes left for implmentation by subclasses.
93 * @param name name of the datatype
94 * @return found datatype or <code>null</code>.
95 */
96 protected abstract Datatype getDatatypeInternal(String name);
97 }