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1
19
20 package org.apache.cayenne.dba;
21
22 import java.io.IOException  ;
23 import java.io.InputStream ;
24 import java.net.URL ;
25 import java.sql.Types ;
26 import java.util.ArrayList ;
27 import java.util.HashMap ;
28 import java.util.List ;
29 import java.util.Map ;
30
31 import org.apache.cayenne.CayenneRuntimeException;
32 import org.apache.cayenne.util.Util;
33 import org.xml.sax.Attributes ;
34 import org.xml.sax.InputSource ;
35 import org.xml.sax.SAXException ;
36 import org.xml.sax.XMLReader ;
37 import org.xml.sax.helpers.DefaultHandler ;
38
39
45 public class TypesHandler {
46
47 private static Map handlerMap = new HashMap ();
48
49 protected Map typesMap;
50
51
54 public static TypesHandler getHandler(URL typesConfig) {
55 synchronized (handlerMap) {
56 TypesHandler handler = (TypesHandler) handlerMap.get(typesConfig);
57
58 if (handler == null) {
59 handler = new TypesHandler(typesConfig);
60 handlerMap.put(typesConfig, handler);
61 }
62
63 return handler;
64 }
65 }
66
67
73 public TypesHandler(URL typesConfig) {
74 try {
75 InputStream in = typesConfig.openStream();
76
77 try {
78 XMLReader parser = Util.createXmlReader();
79 TypesParseHandler ph = new TypesParseHandler();
80 parser.setContentHandler(ph);
81 parser.setErrorHandler(ph);
82 parser.parse(new InputSource (in));
83
84 typesMap = ph.getTypes();
85 }
86 catch (Exception ex) {
87 throw new CayenneRuntimeException(
88 "Error creating TypesHandler '" + typesConfig + "'.",
89 ex);
90 }
91 finally {
92 try {
93 in.close();
94 }
95 catch (IOException ioex) {
96 }
97 }
98 }
99 catch (IOException ioex) {
100 throw new CayenneRuntimeException(
101 "Error opening config file '" + typesConfig + "'.",
102 ioex);
103 }
104 }
105
106 public String [] externalTypesForJdbcType(int type) {
107 return (String []) typesMap.get(new Integer (type));
108 }
109
110
113 final class TypesParseHandler extends DefaultHandler {
114 private static final String JDBC_TYPE_TAG = "jdbc-type";
115 private static final String DB_TYPE_TAG = "db-type";
116 private static final String NAME_ATTR = "name";
117
118 private Map types = new HashMap ();
119 private List currentTypes = new ArrayList ();
120 private int currentType = TypesMapping.NOT_DEFINED;
121
122 public Map getTypes() {
123 return types;
124 }
125
126 public void startElement(
127 String namespaceURI,
128 String localName,
129 String qName,
130 Attributes atts)
131 throws SAXException {
132 if (JDBC_TYPE_TAG.equals(localName)) {
133 currentTypes.clear();
134 String strType = atts.getValue("", NAME_ATTR);
135
136 try {
138 currentType = Types .class.getDeclaredField(strType).getInt(null);
139 }
140 catch (Exception ex) {
141 currentType = TypesMapping.NOT_DEFINED;
142 }
143 }
144 else if (DB_TYPE_TAG.equals(localName)) {
145 currentTypes.add(atts.getValue("", NAME_ATTR));
146 }
147 }
148
149 public void endElement(String namespaceURI, String localName, String qName)
150 throws SAXException {
151 if (JDBC_TYPE_TAG.equals(localName)
152 && currentType != TypesMapping.NOT_DEFINED) {
153 String [] typesAsArray = new String [currentTypes.size()];
154 types.put(new Integer (currentType), currentTypes.toArray(typesAsArray));
155 }
156 }
157 }
158 }
159 |
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