/** Figure out which ClassLoader to use. For JDK 1.2 and later use the context ClassLoader. */
static ClassLoader findClassLoader() throws ConfigurationError {
SecuritySupport ss = SecuritySupport.getInstance();
// Figure out which ClassLoader to use for loading the provider
// class. If there is a Context ClassLoader then use it.
ClassLoader context = ss.getContextClassLoader();
ClassLoader system = ss.getSystemClassLoader();
ClassLoader chain = system;
while (true) {
if (context == chain) {
// Assert: we are on JDK 1.1 or we have no Context ClassLoader
// or any Context ClassLoader in chain of system classloader
// (including extension ClassLoader) so extend to widest
// ClassLoader (always look in system ClassLoader if Xalan
// is in boot/extension/system classpath and in current
// ClassLoader otherwise); normal classloaders delegate
// back to system ClassLoader first so this widening doesn't
// change the fact that context ClassLoader will be consulted
ClassLoader current = ObjectFactory.class.getClassLoader();
chain = system;
while (true) {
if (current == chain) {
// Assert: Current ClassLoader in chain of
// boot/extension/system ClassLoaders
return system;
}
if (chain == null) {
break;
}
chain = ss.getParentClassLoader(chain);
}
// Assert: Current ClassLoader not in chain of
// boot/extension/system ClassLoaders
return current;
}
if (chain == null) {
// boot ClassLoader reached
break;
}
// Check for any extension ClassLoaders in chain up to
// boot ClassLoader
chain = ss.getParentClassLoader(chain);
}
;
// Assert: Context ClassLoader not in chain of
// boot/extension/system ClassLoaders
return context;
} // findClassLoader():ClassLoader
/* 192: */
/* 193: */ static ClassLoader findClassLoader()
/* 194: */ throws ObjectFactory.ConfigurationError
/* 195: */ {
/* 196:396 */ SecuritySupport ss = SecuritySupport.getInstance();
/* 197: */
/* 198: */
/* 199: */
/* 200:400 */ ClassLoader context = ss.getContextClassLoader();
/* 201:401 */ ClassLoader system = ss.getSystemClassLoader();
/* 202: */
/* 203:403 */ ClassLoader chain = system;
/* 204: */ for (; ; )
/* 205: */ {
/* 206:405 */ if (context == chain)
/* 207: */ {
/* 208:414 */ ClassLoader current = ObjectFactory.class.getClassLoader();
/* 209: */
/* 210:416 */ chain = system;
/* 211: */ for (; ; )
/* 212: */ {
/* 213:418 */ if (current == chain) {
/* 214:421 */ return system;
/* 215: */ }
/* 216:423 */ if (chain == null) {
/* 217: */ break;
/* 218: */ }
/* 219:426 */ chain = ss.getParentClassLoader(chain);
/* 220: */ }
/* 221:431 */ return current;
/* 222: */ }
/* 223:434 */ if (chain == null) {
/* 224: */ break;
/* 225: */ }
/* 226:441 */ chain = ss.getParentClassLoader(chain);
/* 227: */ }
/* 228:446 */ return context;
/* 229: */ }
/**
* Find the name of service provider using Jar Service Provider Mechanism
*
* @return instance of provider class if found or null
*/
private static String findJarServiceProviderName(String factoryId) {
SecuritySupport ss = SecuritySupport.getInstance();
String serviceId = SERVICES_PATH + factoryId;
InputStream is = null;
// First try the Context ClassLoader
ClassLoader cl = findClassLoader();
is = ss.getResourceAsStream(cl, serviceId);
// If no provider found then try the current ClassLoader
if (is == null) {
ClassLoader current = ObjectFactory.class.getClassLoader();
if (cl != current) {
cl = current;
is = ss.getResourceAsStream(cl, serviceId);
}
}
if (is == null) {
// No provider found
return null;
}
if (DEBUG) debugPrintln("found jar resource=" + serviceId + " using ClassLoader: " + cl);
// Read the service provider name in UTF-8 as specified in
// the jar spec. Unfortunately this fails in Microsoft
// VJ++, which does not implement the UTF-8
// encoding. Theoretically, we should simply let it fail in
// that case, since the JVM is obviously broken if it
// doesn't support such a basic standard. But since there
// are still some users attempting to use VJ++ for
// development, we have dropped in a fallback which makes a
// second attempt using the platform's default encoding. In
// VJ++ this is apparently ASCII, which is a subset of
// UTF-8... and since the strings we'll be reading here are
// also primarily limited to the 7-bit ASCII range (at
// least, in English versions), this should work well
// enough to keep us on the air until we're ready to
// officially decommit from VJ++. [Edited comment from
// jkesselm]
BufferedReader rd;
try {
rd = new BufferedReader(new InputStreamReader(is, "UTF-8"));
} catch (java.io.UnsupportedEncodingException e) {
rd = new BufferedReader(new InputStreamReader(is));
}
String factoryClassName = null;
try {
// XXX Does not handle all possible input as specified by the
// Jar Service Provider specification
factoryClassName = rd.readLine();
} catch (IOException x) {
// No provider found
return null;
} finally {
try {
// try to close the reader.
rd.close();
}
// Ignore the exception.
catch (IOException exc) {
}
}
if (factoryClassName != null && !"".equals(factoryClassName)) {
if (DEBUG) debugPrintln("found in resource, value=" + factoryClassName);
// Note: here we do not want to fall back to the current
// ClassLoader because we want to avoid the case where the
// resource file was found using one ClassLoader and the
// provider class was instantiated using a different one.
return factoryClassName;
}
// No provider found
return null;
}
/**
* 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
/**
* Finds the implementation Class object 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 Class object of factory, 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/xerces.properties will be used.
* @param fallbackClassName Implementation class name, if nothing else is found. Use null to mean
* no fallback.
* @exception ObjectFactory.ConfigurationError
*/
static Object createObject(String factoryId, String propertiesFilename, String fallbackClassName)
throws ConfigurationError {
if (DEBUG) debugPrintln("debug is on");
ClassLoader cl = findClassLoader();
// Use the system property first
try {
String systemProp = SecuritySupport.getInstance().getSystemProperty(factoryId);
if (systemProp != null && systemProp.length() > 0) {
if (DEBUG) debugPrintln("found system property, value=" + systemProp);
return newInstance(systemProp, cl, true);
}
} catch (SecurityException se) {
// Ignore and continue w/ next location
}
// Try to read from propertiesFilename, or $java.home/lib/xerces.properties
String factoryClassName = null;
// no properties file name specified; use $JAVA_HOME/lib/xerces.properties:
if (propertiesFilename == null) {
File propertiesFile = null;
boolean propertiesFileExists = false;
try {
String javah = SecuritySupport.getInstance().getSystemProperty("java.home");
propertiesFilename =
javah + File.separator + "lib" + File.separator + DEFAULT_PROPERTIES_FILENAME;
propertiesFile = new File(propertiesFilename);
propertiesFileExists = SecuritySupport.getInstance().getFileExists(propertiesFile);
} catch (SecurityException e) {
// try again...
fLastModified = -1;
fXercesProperties = null;
}
synchronized (ObjectFactory.class) {
boolean loadProperties = false;
FileInputStream fis = null;
try {
// file existed last time
if (fLastModified >= 0) {
if (propertiesFileExists
&& (fLastModified
< (fLastModified =
SecuritySupport.getInstance().getLastModified(propertiesFile)))) {
loadProperties = true;
} else {
// file has stopped existing...
if (!propertiesFileExists) {
fLastModified = -1;
fXercesProperties = null;
} // else, file wasn't modified!
}
} else {
// file has started to exist:
if (propertiesFileExists) {
loadProperties = true;
fLastModified = SecuritySupport.getInstance().getLastModified(propertiesFile);
} // else, nothing's changed
}
if (loadProperties) {
// must never have attempted to read xerces.properties before (or it's outdeated)
fXercesProperties = new Properties();
fis = SecuritySupport.getInstance().getFileInputStream(propertiesFile);
fXercesProperties.load(fis);
}
} catch (Exception x) {
fXercesProperties = 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 (fXercesProperties != null) {
factoryClassName = fXercesProperties.getProperty(factoryId);
}
} else {
FileInputStream fis = null;
try {
fis = SecuritySupport.getInstance().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 newInstance(factoryClassName, cl, true);
}
// Try Jar Service Provider Mechanism
Object provider = findJarServiceProvider(factoryId);
if (provider != null) {
return provider;
}
if (fallbackClassName == null) {
throw new ConfigurationError("Provider for " + factoryId + " cannot be found", null);
}
if (DEBUG) debugPrintln("using fallback, value=" + fallbackClassName);
return newInstance(fallbackClassName, cl, true);
} // createObject(String,String,String):Object
/* 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: */ }
/* 307: */
/* 308: */ private static String findJarServiceProviderName(String factoryId) /* 309: */ {
/* 310:537 */ SecuritySupport ss = SecuritySupport.getInstance();
/* 311:538 */ String serviceId = "META-INF/services/" + factoryId;
/* 312:539 */ InputStream is = null;
/* 313: */
/* 314: */
/* 315:542 */ ClassLoader cl = findClassLoader();
/* 316: */
/* 317:544 */ is = ss.getResourceAsStream(cl, serviceId);
/* 318:547 */ if (is == null)
/* 319: */ {
/* 320:548 */ ClassLoader current = ObjectFactory.class.getClassLoader();
/* 321:549 */ if (cl != current)
/* 322: */ {
/* 323:550 */ cl = current;
/* 324:551 */ is = ss.getResourceAsStream(cl, serviceId);
/* 325: */ }
/* 326: */ }
/* 327:555 */ if (is == null) {
/* 328:557 */ return null;
/* 329: */ }
/* 330:560 */ debugPrintln("found jar resource=" + serviceId + " using ClassLoader: " + cl);
/* 331: */ BufferedReader rd;
/* 332: */ try
/* 333: */ {
/* 334:581 */ rd = new BufferedReader(new InputStreamReader(is, "UTF-8"));
/* 335: */ }
/* 336: */ catch (UnsupportedEncodingException e)
/* 337: */ {
/* 338:583 */ rd = new BufferedReader(new InputStreamReader(is));
/* 339: */ }
/* 340:586 */ String factoryClassName = null;
/* 341: */ try
/* 342: */ {
/* 343:590 */ factoryClassName = rd.readLine();
/* 344: */ }
/* 345: */ catch (IOException x)
/* 346: */ {
/* 347:593 */ return null;
/* 348: */ }
/* 349: */ finally
/* 350: */ {
/* 351: */ try
/* 352: */ {
/* 353:598 */ rd.close();
/* 354: */ }
/* 355: */ catch (IOException exc) {
}
/* 356: */ }
/* 357:604 */ if ((factoryClassName != null) && (!"".equals(factoryClassName)))
/* 358: */ {
/* 359:606 */ debugPrintln("found in resource, value=" + factoryClassName);
/* 360: */
/* 361: */
/* 362: */
/* 363: */
/* 364: */
/* 365: */
/* 366:613 */ return factoryClassName;
/* 367: */ }
/* 368:617 */ return null;
/* 369: */ }