Source Code Cross Referenced for IndexDef.java in  » Database-ORM » db-ojb » xdoclet » modules » ojb » model » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database ORM » db ojb » xdoclet.modules.ojb.model 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        package xdoclet.modules.ojb.model;
02:
03:        /* Copyright 2004-2005 The Apache Software Foundation
04:         *
05:         * Licensed under the Apache License, Version 2.0 (the "License");
06:         * you may not use this file except in compliance with the License.
07:         * You may obtain a copy of the License at
08:         *
09:         *     http://www.apache.org/licenses/LICENSE-2.0
10:         *
11:         * Unless required by applicable law or agreed to in writing, software
12:         * distributed under the License is distributed on an "AS IS" BASIS,
13:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14:         * See the License for the specific language governing permissions and
15:         * limitations under the License.
16:         */
17:
18:        import java.util.ArrayList;
19:        import java.util.Iterator;
20:
21:        /**
22:         * Definition of an index descriptor for a ojb-persistent class.
23:         *
24:         * @author <a href="mailto:tomdz@users.sourceforge.net">Thomas Dudziak (tomdz@users.sourceforge.net)</a>
25:         */
26:        public class IndexDef extends DefBase {
27:            /** The columns */
28:            private ArrayList _columns = new ArrayList();
29:            /** Whether this index is unique */
30:            private boolean _isUnique = false;
31:
32:            /**
33:             * Creates a new index descriptor definition object.
34:             *
35:             * @param name     The name of the index
36:             * @param isUnique Whether this index is unique
37:             */
38:            public IndexDef(String name, boolean isUnique) {
39:                super (name == null ? "" : name);
40:                _isUnique = isUnique;
41:            }
42:
43:            /**
44:             * Determines whether this index is the default index.
45:             * 
46:             * @return <code>true</code> if it is the default index
47:             */
48:            public boolean isDefault() {
49:                return (getName() == null) || (getName().length() == 0);
50:            }
51:
52:            /**
53:             * Returns whether this index is unique.
54:             * 
55:             * @return <code>true</code> if this index is an unique index
56:             */
57:            public boolean isUnique() {
58:                return _isUnique;
59:            }
60:
61:            /**
62:             * Adds a column to this index.
63:             * 
64:             * @param column The column
65:             */
66:            public void addColumn(String column) {
67:                if (!_columns.contains(column)) {
68:                    _columns.add(column);
69:                }
70:            }
71:
72:            /**
73:             * Returns an iterator of the columns of this index.
74:             * 
75:             * @return The iterator
76:             */
77:            public Iterator getColumns() {
78:                return _columns.iterator();
79:            }
80:        }
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