/**
* Finds the name of the required implementation class in the specified order. The specified order
* is the following:
*
* <ol>
* <li>query the system property using <code>System.getProperty</code>
* <li>read <code>$java.home/lib/<i>propertiesFilename</i></code> file
* <li>read <code>META-INF/services/<i>factoryId</i></code> file
* <li>use fallback classname
* </ol>
*
* @return name of class that provides factory service, never null
* @param factoryId Name of the factory to find, same as a property name
* @param propertiesFilename The filename in the $java.home/lib directory of the properties file.
* If none specified, ${java.home}/lib/xalan.properties will be used.
* @param fallbackClassName Implementation class name, if nothing else is found. Use null to mean
* no fallback.
* @exception ObjectFactory.ConfigurationError
*/
static String lookUpFactoryClassName(
String factoryId, String propertiesFilename, String fallbackClassName) {
SecuritySupport ss = SecuritySupport.getInstance();
// Use the system property first
try {
String systemProp = ss.getSystemProperty(factoryId);
if (systemProp != null) {
if (DEBUG) debugPrintln("found system property, value=" + systemProp);
return systemProp;
}
} catch (SecurityException se) {
// Ignore and continue w/ next location
}
// Try to read from propertiesFilename, or
// $java.home/lib/xalan.properties
String factoryClassName = null;
// no properties file name specified; use
// $JAVA_HOME/lib/xalan.properties:
if (propertiesFilename == null) {
File propertiesFile = null;
boolean propertiesFileExists = false;
try {
String javah = ss.getSystemProperty("java.home");
propertiesFilename =
javah + File.separator + "lib" + File.separator + DEFAULT_PROPERTIES_FILENAME;
propertiesFile = new File(propertiesFilename);
propertiesFileExists = ss.getFileExists(propertiesFile);
} catch (SecurityException e) {
// try again...
fLastModified = -1;
fXalanProperties = null;
}
synchronized (ObjectFactory.class) {
boolean loadProperties = false;
FileInputStream fis = null;
try {
// file existed last time
if (fLastModified >= 0) {
if (propertiesFileExists
&& (fLastModified < (fLastModified = ss.getLastModified(propertiesFile)))) {
loadProperties = true;
} else {
// file has stopped existing...
if (!propertiesFileExists) {
fLastModified = -1;
fXalanProperties = null;
} // else, file wasn't modified!
}
} else {
// file has started to exist:
if (propertiesFileExists) {
loadProperties = true;
fLastModified = ss.getLastModified(propertiesFile);
} // else, nothing's changed
}
if (loadProperties) {
// must never have attempted to read xalan.properties
// before (or it's outdeated)
fXalanProperties = new Properties();
fis = ss.getFileInputStream(propertiesFile);
fXalanProperties.load(fis);
}
} catch (Exception x) {
fXalanProperties = null;
fLastModified = -1;
// assert(x instanceof FileNotFoundException
// || x instanceof SecurityException)
// In both cases, ignore and continue w/ next location
} finally {
// try to close the input stream if one was opened.
if (fis != null) {
try {
fis.close();
}
// Ignore the exception.
catch (IOException exc) {
}
}
}
}
if (fXalanProperties != null) {
factoryClassName = fXalanProperties.getProperty(factoryId);
}
} else {
FileInputStream fis = null;
try {
fis = ss.getFileInputStream(new File(propertiesFilename));
Properties props = new Properties();
props.load(fis);
factoryClassName = props.getProperty(factoryId);
} catch (Exception x) {
// assert(x instanceof FileNotFoundException
// || x instanceof SecurityException)
// In both cases, ignore and continue w/ next location
} finally {
// try to close the input stream if one was opened.
if (fis != null) {
try {
fis.close();
}
// Ignore the exception.
catch (IOException exc) {
}
}
}
}
if (factoryClassName != null) {
if (DEBUG) debugPrintln("found in " + propertiesFilename + ", value=" + factoryClassName);
return factoryClassName;
}
// Try Jar Service Provider Mechanism
return findJarServiceProviderName(factoryId);
} // lookUpFactoryClass(String,String):String
/* 79: */
/* 80: */ static String lookUpFactoryClassName(
String factoryId, String propertiesFilename, String fallbackClassName)
/* 81: */ {
/* 82:261 */ SecuritySupport ss = SecuritySupport.getInstance();
/* 83: */ try
/* 84: */ {
/* 85:265 */ String systemProp = ss.getSystemProperty(factoryId);
/* 86:266 */ if (systemProp != null)
/* 87: */ {
/* 88:267 */ debugPrintln("found system property, value=" + systemProp);
/* 89:268 */ return systemProp;
/* 90: */ }
/* 91: */ }
/* 92: */ catch (SecurityException se) {
}
/* 93:276 */ String factoryClassName = null;
/* 94:279 */ if (propertiesFilename == null)
/* 95: */ {
/* 96:280 */ File propertiesFile = null;
/* 97:281 */ boolean propertiesFileExists = false;
/* 98: */ try
/* 99: */ {
/* 100:283 */ String javah = ss.getSystemProperty("java.home");
/* 101:284 */ propertiesFilename =
javah + File.separator + "lib" + File.separator + "xalan.properties";
/* 102: */
/* 103:286 */ propertiesFile = new File(propertiesFilename);
/* 104:287 */ propertiesFileExists = ss.getFileExists(propertiesFile);
/* 105: */ }
/* 106: */ catch (SecurityException javah)
/* 107: */ {
/* 108:290 */ fLastModified = -1L;
/* 109:291 */ fXalanProperties = null;
/* 110: */ }
/* 111:294 */ synchronized (ObjectFactory.class)
/* 112: */ {
/* 113:295 */ boolean loadProperties = false;
/* 114:296 */ FileInputStream fis = null;
/* 115: */ try
/* 116: */ {
/* 117:299 */ if (fLastModified >= 0L)
/* 118: */ {
/* 119:300 */ if ((propertiesFileExists)
&& (fLastModified
< (ObjectFactory.fLastModified = ss.getLastModified(propertiesFile))))
/* 120: */ {
/* 121:302 */ loadProperties = true;
/* 122: */ }
/* 123:305 */ else if (!propertiesFileExists)
/* 124: */ {
/* 125:306 */ fLastModified = -1L;
/* 126:307 */ fXalanProperties = null;
/* 127: */ }
/* 128: */ }
/* 129:312 */ else if (propertiesFileExists)
/* 130: */ {
/* 131:313 */ loadProperties = true;
/* 132:314 */ fLastModified = ss.getLastModified(propertiesFile);
/* 133: */ }
/* 134:317 */ if (loadProperties)
/* 135: */ {
/* 136:320 */ fXalanProperties = new Properties();
/* 137:321 */ fis = ss.getFileInputStream(propertiesFile);
/* 138:322 */ fXalanProperties.load(fis);
/* 139: */ }
/* 140: */ }
/* 141: */ catch (Exception x)
/* 142: */ {
/* 143:325 */ fXalanProperties = null;
/* 144:326 */ fLastModified = -1L;
/* 145: */ }
/* 146: */ finally
/* 147: */ {
/* 148:333 */ if (fis != null) {
/* 149: */ try
/* 150: */ {
/* 151:335 */ fis.close();
/* 152: */ }
/* 153: */ catch (IOException exc) {
}
/* 154: */ }
/* 155: */ }
/* 156: */ }
/* 157:342 */ if (fXalanProperties != null) {
/* 158:343 */ factoryClassName = fXalanProperties.getProperty(factoryId);
/* 159: */ }
/* 160: */ }
/* 161: */ else
/* 162: */ {
/* 163:346 */ FileInputStream fis = null;
/* 164: */ try
/* 165: */ {
/* 166:348 */ fis = ss.getFileInputStream(new File(propertiesFilename));
/* 167:349 */ Properties props = new Properties();
/* 168:350 */ props.load(fis);
/* 169:351 */ factoryClassName = props.getProperty(factoryId);
/* 170: */ }
/* 171: */ catch (Exception x) {
} finally
/* 172: */ {
/* 173:359 */ if (fis != null) {
/* 174: */ try
/* 175: */ {
/* 176:361 */ fis.close();
/* 177: */ }
/* 178: */ catch (IOException exc) {
}
/* 179: */ }
/* 180: */ }
/* 181: */ }
/* 182:368 */ if (factoryClassName != null)
/* 183: */ {
/* 184:369 */ debugPrintln("found in " + propertiesFilename + ", value=" + factoryClassName);
/* 185: */
/* 186:371 */ return factoryClassName;
/* 187: */ }
/* 188:375 */ return findJarServiceProviderName(factoryId);
/* 189: */ }
