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Java > Open Source Codes > org > apache > ojb > broker > metadata > torque > TorqueIndexGenerator


1 package org.apache.ojb.broker.metadata.torque;
2
3 /* Copyright 2002-2005 The Apache Software Foundation
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * 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 org.apache.ojb.broker.metadata.IndexDescriptor;
19
20 import java.util.Vector JavaDoc;
21
22 public class TorqueIndexGenerator {
23
24     public void generateIndices(Vector JavaDoc indexDescriptors, StringBuffer JavaDoc buffer) {
25         int numIndexes = indexDescriptors.size();
26         for (int i = 0; i < numIndexes; i++) {
27             IndexDescriptor index = (IndexDescriptor) indexDescriptors.get(i);
28             String JavaDoc indexTag = getIndexTag(index);
29
30             buffer.append(" <");
31             buffer.append(indexTag);
32             if (index.getName() != null) {
33                 buffer.append(" name=\"");
34                 buffer.append(index.getName());
35                 buffer.append("\"");
36             }
37             buffer.append(">\n");
38
39             generateStringVector(index.getIndexColumns(), indexTag + "-column", "name", " ", buffer);
40             buffer.append(" </");
41             buffer.append(indexTag);
42             buffer.append(">\n");
43         }
44     }
45
46     private String JavaDoc getIndexTag(IndexDescriptor indexDescriptor) {
47         if (indexDescriptor.isUnique()) {
48             return "unique";
49         } else {
50             return "index";
51         }
52     }
53
54     private void generateStringVector(Vector JavaDoc strings, String JavaDoc element, String JavaDoc attribute, String JavaDoc indentation, StringBuffer JavaDoc buffer) {
55         for (int i = 0; i < strings.size(); i++) {
56             buffer.append(indentation);
57             buffer.append("<");
58             buffer.append(element);
59             buffer.append(" ");
60             buffer.append(attribute);
61             buffer.append("=\"");
62             buffer.append(strings.get(i));
63             buffer.append("\"/>\n");
64         }
65     }
66
67 }
68
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