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1
7 package com.jofti.core;
8
9 import java.util.Properties  ;
10
11 import org.apache.commons.logging.Log;
12 import org.apache.commons.logging.LogFactory;
13
14
15 import com.jofti.btree.BTree;
16 import com.jofti.exception.JoftiException;
17 import com.jofti.introspect.ClassIntrospector;
18 import com.jofti.manager.IndexManagerImpl;
19 import com.jofti.tree.TreeIndex;
20 import com.jofti.util.ReflectionUtil;
21
22
30 public class GenericIndexFactory {
31
32 private static GenericIndexFactory factory = new GenericIndexFactory();
33
34
35 private static Log log = LogFactory.getLog(IndexManagerImpl.class);
36
37 public static GenericIndexFactory getInstance(){
38 return factory;
39 }
40
41
50 public InternalIndex createIndex(String indexType,
51 ClassIntrospector parser, Properties props, String name)
52 throws JoftiException {
53 InternalIndex index =null;
54 try {
55 Class indexClass = ReflectionUtil.classForName(indexType);
56
57 if (!(InternalIndex.class.isAssignableFrom(indexClass))) {
58 throw new JoftiException("Class '" + indexClass
59 + "' must implement Index interface ");
60 }
61
62 index = (InternalIndex)indexClass.newInstance();
63
64 } catch (InstantiationException e) {
65 throw new JoftiException("Problem instantiating Index", e);
66 } catch (ClassNotFoundException e) {
67 throw new JoftiException("Problem finding Index class", e);
68 } catch (IllegalAccessException e) {
69 throw new JoftiException("Problem instantiating Index", e);
70 } catch (Exception e) {
71 throw new JoftiException("Problem calling init() method on Index '"
72 + indexType + "'", e);
73
74 }
75 IStoreManager manager =null;
76 try{
77 manager = configureOverflowManager(props,name);
78 } catch (InstantiationException e) {
79 throw new JoftiException("Problem instantiating disk-overflow provider " +props, e);
80 } catch (ClassNotFoundException e) {
81 throw new JoftiException("Problem instantiating disk-overflow provider "+props, e);
82 } catch (IllegalAccessException e) {
83 throw new JoftiException("Problem instantiating disk-overflow provider "+props, e);
84 } catch (Exception e) {
85 throw new JoftiException("Problem calling init() method on overflow provider '"
86 + name + "'", e);
87
88 }
89
90
91
92
93
94 if (index instanceof TreeIndex){
95
96 BTree bTree = new BTree();
97 ((TreeIndex)index).setTree(bTree);
98 ((TreeIndex)index).setParser(parser);
99
100 if (manager != null){
101 bTree.setOverflowManager(manager);
102 }
103
104 }
105 ((TreeIndex)index).init(props);
106
107 return index;
108
109
110
111 }
112
113 private IStoreManager configureOverflowManager(Properties props,String name) throws Exception {
114
115 String providerString = props.getProperty("provider");
116 Class providerClass = null;
117 if (providerString != null){
118 providerClass =ReflectionUtil.classForName(providerString);
119 }
120 IStoreManager manager = null;
121
122 if (providerClass != null){
123 manager = (IStoreManager) providerClass.newInstance();
124
125 if (manager != null){
126 manager.setName(name);
127 manager.init(props);
128 }
129
130 }
131 return manager;
132
133 }
134
135 }
136 |
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