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1
22
23
24 package com.mchange.v2.c3p0.cfg;
25
26 import java.io.*;
27 import java.util.*;
28 import javax.xml.parsers.*;
29 import org.w3c.dom.*;
30 import com.mchange.v2.log.*;
31
32 import com.mchange.v1.xml.DomParseUtils;
33
34 public final class C3P0ConfigXmlUtils
35 {
36 public final static String  XML_CONFIG_RSRC_PATH = "/c3p0-config.xml";
37
38 final static MLogger logger = MLog.getLogger( C3P0ConfigXmlUtils.class );
39
40 public final static String LINESEP;
41
42 private final static String [] MISSPELL_PFXS = {"/c3p0", "/c3pO", "/c3po", "/C3P0", "/C3PO"};
43 private final static char[] MISSPELL_LINES = {'-', '_'};
44 private final static String [] MISSPELL_CONFIG = {"config", "CONFIG"};
45 private final static String [] MISSPELL_XML = {"xml", "XML"};
46
47 private final static void warnCommonXmlConfigResourceMisspellings()
55 {
56 if (logger.isLoggable( MLevel.WARNING) )
57 {
58 for (int a = 0, lena = MISSPELL_PFXS.length; a < lena; ++a)
59 {
60 StringBuffer sb = new StringBuffer (16);
61 sb.append( MISSPELL_PFXS[a] );
62 for (int b = 0, lenb = MISSPELL_LINES.length; b < lenb; ++b)
63 {
64 sb.append(MISSPELL_LINES[b]);
65 for (int c = 0, lenc = MISSPELL_CONFIG.length; c < lenc; ++c)
66 {
67 sb.append(MISSPELL_CONFIG[c]);
68 sb.append('.');
69 for (int d = 0, lend = MISSPELL_XML.length; d < lend; ++d)
70 {
71 sb.append(MISSPELL_XML[d]);
72 String test = sb.toString();
73 if (!test.equals(XML_CONFIG_RSRC_PATH))
74 {
75 Object hopefullyNull = C3P0ConfigXmlUtils.class.getResource( test );
76 if (hopefullyNull != null)
77 {
78 logger.warning("POSSIBLY MISSPELLED c3p0-conf.xml RESOURCE FOUND. " +
79 "Please ensure the file name is c3p0-config.xml, all lower case, " +
80 "with the digit 0 (NOT the letter O) in c3p0. It should be placed " +
81 " in the top level of c3p0's effective classpath.");
82 return;
83 }
84 }
85 }
86 }
87
88 }
89 }
90 }
91 }
92
93 static
94 {
95 String ls;
96
97 try
98 { ls = System.getProperty("line.separator", "\r\n"); }
99 catch (Exception e)
100 { ls = "\r\n"; }
101
102 LINESEP = ls;
103
104 }
105
106 public static C3P0Config extractXmlConfigFromDefaultResource() throws Exception
107 {
108 InputStream is = null;
109
110 try
111 {
112 is = C3P0ConfigUtils.class.getResourceAsStream(XML_CONFIG_RSRC_PATH);
113 if ( is == null )
114 {
115 warnCommonXmlConfigResourceMisspellings();
116 return null;
117 }
118 else
119 return extractXmlConfigFromInputStream( is );
120 }
121 finally
122 {
123 try { if (is != null) is.close(); }
124 catch (Exception e)
125 {
126 if ( logger.isLoggable( MLevel.FINE ) )
127 logger.log(MLevel.FINE,"Exception on resource InputStream close.", e);
128 }
129 }
130 }
131
132 public static C3P0Config extractXmlConfigFromInputStream(InputStream is) throws Exception
133 {
134 DocumentBuilderFactory fact = DocumentBuilderFactory.newInstance();
135 DocumentBuilder db = fact.newDocumentBuilder();
136 Document doc = db.parse( is );
137
138 return extractConfigFromXmlDoc(doc);
139 }
140
141 public static C3P0Config extractConfigFromXmlDoc(Document doc) throws Exception
142 {
143 Element docElem = doc.getDocumentElement();
144 if (docElem.getTagName().equals("c3p0-config"))
145 {
146 NamedScope defaults;
147 HashMap configNamesToNamedScopes = new HashMap();
148
149 Element defaultConfigElem = DomParseUtils.uniqueChild( docElem, "default-config" );
150 if (defaultConfigElem != null)
151 defaults = extractNamedScopeFromLevel( defaultConfigElem );
152 else
153 defaults = new NamedScope();
154 NodeList nl = DomParseUtils.immediateChildElementsByTagName(docElem, "named-config");
155 for (int i = 0, len = nl.getLength(); i < len; ++i)
156 {
157 Element namedConfigElem = (Element) nl.item(i);
158 String configName = namedConfigElem.getAttribute("name");
159 if (configName != null && configName.length() > 0)
160 {
161 NamedScope namedConfig = extractNamedScopeFromLevel( namedConfigElem );
162 configNamesToNamedScopes.put( configName, namedConfig);
163 }
164 else
165 logger.warning("Configuration XML contained named-config element without name attribute: " + namedConfigElem);
166 }
167 return new C3P0Config( defaults, configNamesToNamedScopes );
168 }
169 else
170 throw new Exception ("Root element of c3p0 config xml should be 'c3p0-config', not '" + docElem.getTagName() + "'.");
171 }
172
173 private static NamedScope extractNamedScopeFromLevel(Element elem)
174 {
175 HashMap props = extractPropertiesFromLevel( elem );
176 HashMap userNamesToOverrides = new HashMap();
177
178 NodeList nl = DomParseUtils.immediateChildElementsByTagName(elem, "user-overrides");
179 for (int i = 0, len = nl.getLength(); i < len; ++i)
180 {
181 Element perUserConfigElem = (Element) nl.item(i);
182 String userName = perUserConfigElem.getAttribute("user");
183 if (userName != null && userName.length() > 0)
184 {
185 HashMap userProps = extractPropertiesFromLevel( perUserConfigElem );
186 userNamesToOverrides.put( userName, userProps );
187 }
188 else
189 logger.warning("Configuration XML contained user-overrides element without user attribute: " + LINESEP + perUserConfigElem);
190 }
191
192 return new NamedScope(props, userNamesToOverrides);
193 }
194
195 private static HashMap extractPropertiesFromLevel(Element elem)
196 {
197
199 HashMap out = new HashMap();
200
201 try
202 {
203 NodeList nl = DomParseUtils.immediateChildElementsByTagName(elem, "property");
204 int len = nl.getLength();
205 for (int i = 0; i < len; ++i)
206 {
207 Element propertyElem = (Element) nl.item(i);
208 String propName = propertyElem.getAttribute("name");
209 if (propName != null && propName.length() > 0)
210 {
211 String propVal = DomParseUtils.allTextFromElement(propertyElem, true);
212 out.put( propName, propVal );
213 }
215 else
216 logger.warning("Configuration XML contained property element without name attribute: " + LINESEP + propertyElem);
217 }
218 }
219 catch (Exception e)
220 {
221 logger.log( MLevel.WARNING,
222 "An exception occurred while reading config XML. " +
223 "Some configuration information has probably been ignored.",
224 e );
225 }
226
227 return out;
228 }
229
230 private C3P0ConfigXmlUtils()
231 {}
232 } |
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