src/com/sun/org/apache/xerces/internal/utils/ObjectFactory.java
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*** 18,36 ****
* limitations under the License.
*/
package com.sun.org.apache.xerces.internal.utils;
- import java.io.InputStream;
- import java.io.IOException;
- import java.io.File;
- import java.io.FileInputStream;
-
- import java.util.Properties;
- import java.io.BufferedReader;
- import java.io.InputStreamReader;
-
/**
* This class is duplicated for each JAXP subpackage so keep it in sync.
* It is package private and therefore is not exposed as part of the JAXP
* API.
* <p>
--- 18,27 ----
*** 48,164 ****
//
// Constants
//
private static final String DEFAULT_INTERNAL_CLASSES = "com.sun.org.apache.";
- // name of default properties file to look for in JDK's jre/lib directory
- private static final String DEFAULT_PROPERTIES_FILENAME = "xerces.properties";
-
/** Set to true for debugging */
private static final boolean DEBUG = isDebugEnabled();
- /**
- * Default columns per line.
- */
- private static final int DEFAULT_LINE_LENGTH = 80;
-
- /** cache the contents of the xerces.properties file.
- * Until an attempt has been made to read this file, this will
- * be null; if the file does not exist or we encounter some other error
- * during the read, this will be empty.
- */
- private static Properties fXercesProperties = null;
-
- /***
- * Cache the time stamp of the xerces.properties file so
- * that we know if it's been modified and can invalidate
- * the cache when necessary.
- */
- private static long fLastModified = -1;
-
- //
- // static methods
- //
-
- /**
- * 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>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 fallbackClassName Implementation class name, if nothing else
- * is found. Use null to mean no fallback.
- *
- * @exception ObjectFactory.ConfigurationError
- */
- public static Object createObject(String factoryId, String fallbackClassName)
- throws ConfigurationError {
- return createObject(factoryId, null, fallbackClassName);
- } // createObject(String,String):Object
-
- /**
- * 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
- */
- public 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.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
- }
-
- // JAXP specific change
- // always use fallback class to avoid the expense of constantly
- // "stat"ing a non-existent "xerces.properties" and jar SPI entry
- // see CR 6400863: Expensive creating of SAX parser in Mustang
- 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
//
// Private static methods
//
--- 39,51 ----
*** 233,243 ****
}
// Check for any extension ClassLoaders in chain up to
// boot ClassLoader
chain = SecuritySupport.getParentClassLoader(chain);
! };
// Assert: Context ClassLoader not in chain of
// boot/extension/system ClassLoaders
return context;
} // findClassLoader():ClassLoader
--- 120,130 ----
}
// Check for any extension ClassLoaders in chain up to
// boot ClassLoader
chain = SecuritySupport.getParentClassLoader(chain);
! }
// Assert: Context ClassLoader not in chain of
// boot/extension/system ClassLoaders
return context;
} // findClassLoader():ClassLoader
*** 341,436 ****
}
return providerClass;
}
- /*
- * Try to find provider using Jar Service Provider Mechanism
- *
- * @return instance of provider class if found or null
- */
- private static Object findJarServiceProvider(String factoryId)
- throws ConfigurationError
- {
- String serviceId = "META-INF/services/" + factoryId;
- InputStream is = null;
-
- // First try the Context ClassLoader
- ClassLoader cl = findClassLoader();
-
- is = SecuritySupport.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 = SecuritySupport.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"), DEFAULT_LINE_LENGTH);
- } catch (java.io.UnsupportedEncodingException e) {
- rd = new BufferedReader(new InputStreamReader(is), DEFAULT_LINE_LENGTH);
- }
-
- 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 newInstance(factoryClassName, cl, false);
- }
-
- // No provider found
- return null;
- }
-
} // class ObjectFactory
--- 228,233 ----