src/javax/xml/stream/FactoryFinder.java

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*** 23,70 **** * questions. */ package javax.xml.stream; - 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; /** * <p>Implements pluggable Datatypes.</p> * ! * <p>This class is duplicated for each JAXP subpackage so keep it in ! * sync. It is package private for secure class loading.</p> * * @author Santiago.PericasGeertsen@sun.com */ class FactoryFinder { /** * Internal debug flag. */ private static boolean debug = false; - /** * Cache for properties in java.home/lib/jaxp.properties */ static Properties cacheProps = new Properties(); - /** ! * Flag indicating if properties from java.home/lib/jaxp.properties ! * have been cached. */ static volatile boolean firstTime = true; - /** ! * Security support class use to check access control before ! * getting certain system resources. */ static SecuritySupport ss = new SecuritySupport(); // Define system property "jaxp.debug" to get output static { --- 23,65 ---- * questions. */ package javax.xml.stream; import java.io.File; ! import java.security.AccessController; ! import java.security.PrivilegedAction; import java.util.Properties; ! import java.util.ServiceConfigurationError; ! import java.util.ServiceLoader; /** * <p>Implements pluggable Datatypes.</p> * ! * <p>This class is duplicated for each JAXP subpackage so keep it in sync. It ! * is package private for secure class loading.</p> * * @author Santiago.PericasGeertsen@sun.com */ class FactoryFinder { /** * Internal debug flag. */ private static boolean debug = false; /** * Cache for properties in java.home/lib/jaxp.properties */ static Properties cacheProps = new Properties(); /** ! * Flag indicating if properties from java.home/lib/jaxp.properties have ! * been cached. */ static volatile boolean firstTime = true; /** ! * Security support class use to check access control before getting certain ! * system resources. */ static SecuritySupport ss = new SecuritySupport(); // Define system property "jaxp.debug" to get output static {
*** 72,83 **** // SecurityException out of this code. try { String val = ss.getSystemProperty("jaxp.debug"); // Allow simply setting the prop to turn on debug debug = val != null && !"false".equals(val); ! } ! catch (SecurityException se) { debug = false; } } private static void dPrint(String msg) { --- 67,77 ---- // SecurityException out of this code. try { String val = ss.getSystemProperty("jaxp.debug"); // Allow simply setting the prop to turn on debug debug = val != null && !"false".equals(val); ! } catch (SecurityException se) { debug = false; } } private static void dPrint(String msg) {
*** 89,239 **** /** * Attempt to load a class using the class loader supplied. If that fails * and fall back is enabled, the current (i.e. bootstrap) class loader is * tried. * ! * If the class loader supplied is <code>null</code>, first try using the ! * context class loader followed by the current (i.e. bootstrap) class ! * loader. */ static private Class getProviderClass(String className, ClassLoader cl, ! boolean doFallback) throws ClassNotFoundException ! { try { if (cl == null) { cl = ss.getContextClassLoader(); if (cl == null) { throw new ClassNotFoundException(); ! } ! else { return cl.loadClass(className); } ! } ! else { return cl.loadClass(className); } ! } ! catch (ClassNotFoundException e1) { if (doFallback) { // Use current class loader - should always be bootstrap CL return Class.forName(className, true, FactoryFinder.class.getClassLoader()); ! } ! else { throw e1; } } } /** * Create an instance of a class. Delegates to method * <code>getProviderClass()</code> in order to load the class. * ! * @param className Name of the concrete class corresponding to the ! * service provider * ! * @param cl ClassLoader to use to load the class, null means to use ! * the bootstrap ClassLoader * ! * @param doFallback True if the current ClassLoader should be tried as ! * a fallback if the class is not found using cl */ static Object newInstance(String className, ClassLoader cl, boolean doFallback) ! throws ConfigurationError ! { try { Class providerClass = getProviderClass(className, cl, doFallback); Object instance = providerClass.newInstance(); if (debug) { // Extra check to avoid computing cl strings ! dPrint("created new instance of " + providerClass + ! " using ClassLoader: " + cl); } return instance; ! } ! catch (ClassNotFoundException x) { ! throw new ConfigurationError( "Provider " + className + " not found", x); ! } ! catch (Exception x) { ! throw new ConfigurationError( "Provider " + className + " could not be instantiated: " + x, x); } } /** * Finds the implementation Class object in the specified order. * * @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. * * Package private so this code can be shared. */ ! static Object find(String factoryId, String fallbackClassName) ! throws ConfigurationError ! { ! return find(factoryId, null, fallbackClassName); } /** ! * Finds the implementation Class object in the specified order. Main ! * entry point. * @return Class object of factory, never null * ! * @param factoryId Name of the factory to find, same as ! * a property name * ! * @param cl ClassLoader to be used to load the class, null means to use ! * the bootstrap ClassLoader * ! * @param fallbackClassName Implementation class name, if nothing else ! * is found. Use null to mean no fallback. * * Package private so this code can be shared. */ ! static Object find(String factoryId, ClassLoader cl, String fallbackClassName) ! throws ConfigurationError ! { dPrint("find factoryId =" + factoryId); // Use the system property first try { String systemProp = ss.getSystemProperty(factoryId); if (systemProp != null) { dPrint("found system property, value=" + systemProp); return newInstance(systemProp, null, true); } } - catch (SecurityException se) { - if (debug) se.printStackTrace(); } // Try read $java.home/lib/stax.properties followed by // $java.home/lib/jaxp.properties if former not present String configFile = null; try { String factoryClassName = null; if (firstTime) { synchronized (cacheProps) { if (firstTime) { ! configFile = ss.getSystemProperty("java.home") + File.separator + ! "lib" + File.separator + "stax.properties"; File f = new File(configFile); firstTime = false; if (ss.doesFileExist(f)) { ! dPrint("Read properties file "+f); cacheProps.load(ss.getFileInputStream(f)); ! } ! else { ! configFile = ss.getSystemProperty("java.home") + File.separator + ! "lib" + File.separator + "jaxp.properties"; f = new File(configFile); if (ss.doesFileExist(f)) { ! dPrint("Read properties file "+f); cacheProps.load(ss.getFileInputStream(f)); } } } } --- 83,222 ---- /** * Attempt to load a class using the class loader supplied. If that fails * and fall back is enabled, the current (i.e. bootstrap) class loader is * tried. * ! * If the class loader supplied is ! * <code>null</code>, first try using the context class loader followed by ! * the current (i.e. bootstrap) class loader. */ static private Class getProviderClass(String className, ClassLoader cl, ! boolean doFallback) throws ClassNotFoundException { try { if (cl == null) { cl = ss.getContextClassLoader(); if (cl == null) { throw new ClassNotFoundException(); ! } else { return cl.loadClass(className); } ! } else { return cl.loadClass(className); } ! } catch (ClassNotFoundException e1) { if (doFallback) { // Use current class loader - should always be bootstrap CL return Class.forName(className, true, FactoryFinder.class.getClassLoader()); ! } else { throw e1; } } } /** * Create an instance of a class. Delegates to method * <code>getProviderClass()</code> in order to load the class. * ! * @param className Name of the concrete class corresponding to the service ! * provider * ! * @param cl ClassLoader to use to load the class, null means to use the ! * bootstrap ClassLoader * ! * @param doFallback True if the current ClassLoader should be tried as a ! * fallback if the class is not found using cl */ static Object newInstance(String className, ClassLoader cl, boolean doFallback) ! throws FactoryConfigurationError { try { Class providerClass = getProviderClass(className, cl, doFallback); Object instance = providerClass.newInstance(); if (debug) { // Extra check to avoid computing cl strings ! dPrint("created new instance of " + providerClass ! + " using ClassLoader: " + cl); } return instance; ! } catch (ClassNotFoundException x) { ! throw new FactoryConfigurationError( "Provider " + className + " not found", x); ! } catch (Exception x) { ! throw new FactoryConfigurationError( "Provider " + className + " could not be instantiated: " + x, x); } } /** * Finds the implementation Class object in the specified order. * * @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. * * Package private so this code can be shared. */ ! static Object find(Class factoryClass, String factoryId, String fallbackClassName) ! throws FactoryConfigurationError { ! return find(factoryClass, factoryId, null, fallbackClassName); } /** ! * Finds the implementation Class object in the specified order. Main entry ! * point. ! * * @return Class object of factory, never null * ! * @param factoryId Name of the factory to find, same as a property name * ! * @param cl ClassLoader to be used to load the class, null means to use the ! * bootstrap ClassLoader * ! * @param fallbackClassName Implementation class name, if nothing else is ! * found. Use null to mean no fallback. * * Package private so this code can be shared. */ ! static Object find(Class factoryClass, String factoryId, ClassLoader cl, String fallbackClassName) ! throws FactoryConfigurationError { dPrint("find factoryId =" + factoryId); // Use the system property first try { String systemProp = ss.getSystemProperty(factoryId); if (systemProp != null) { dPrint("found system property, value=" + systemProp); return newInstance(systemProp, null, true); } + } catch (SecurityException se) { + if (debug) { + se.printStackTrace(); } } // Try read $java.home/lib/stax.properties followed by // $java.home/lib/jaxp.properties if former not present String configFile = null; try { String factoryClassName = null; if (firstTime) { synchronized (cacheProps) { if (firstTime) { ! configFile = ss.getSystemProperty("java.home") + File.separator ! + "lib" + File.separator + "stax.properties"; File f = new File(configFile); firstTime = false; if (ss.doesFileExist(f)) { ! dPrint("Read properties file " + f); cacheProps.load(ss.getFileInputStream(f)); ! } else { ! configFile = ss.getSystemProperty("java.home") + File.separator ! + "lib" + File.separator + "jaxp.properties"; f = new File(configFile); if (ss.doesFileExist(f)) { ! dPrint("Read properties file " + f); cacheProps.load(ss.getFileInputStream(f)); } } } }
*** 242,359 **** if (factoryClassName != null) { dPrint("found in " + configFile + " value=" + factoryClassName); return newInstance(factoryClassName, null, true); } } - catch (Exception ex) { - if (debug) ex.printStackTrace(); } // 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); } dPrint("loaded from fallback value: " + fallbackClassName); return newInstance(fallbackClassName, cl, true); } /* ! * 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 = ss.getContextClassLoader(); ! if (cl != null) { ! is = ss.getResourceAsStream(cl, serviceId); ! ! // If no provider found then try the current ClassLoader ! if (is == null) { ! cl = FactoryFinder.class.getClassLoader(); ! is = ss.getResourceAsStream(cl, serviceId); ! } ! } else { ! // No Context ClassLoader, try the current ClassLoader ! cl = FactoryFinder.class.getClassLoader(); ! is = ss.getResourceAsStream(cl, serviceId); ! } ! ! if (is == null) { ! // No provider found ! return null; ! } ! ! if (debug) { // Extra check to avoid computing cl strings ! dPrint("found jar resource=" + serviceId + " using ClassLoader: " + cl); ! } ! ! 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(); - rd.close(); - } catch (IOException x) { - // No provider found - return null; } ! ! if (factoryClassName != null && !"".equals(factoryClassName)) { ! dPrint("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; } ! ! static class ConfigurationError extends Error { ! private Exception exception; ! ! /** ! * Construct a new instance with the specified detail string and ! * exception. ! */ ! ConfigurationError(String msg, Exception x) { ! super(msg); ! this.exception = x; ! } ! ! Exception getException() { ! return exception; ! } ! /** ! * use the exception chaining mechanism of JDK1.4 ! */ ! @Override ! public Throwable getCause() { ! return exception; } } - } --- 225,281 ---- if (factoryClassName != null) { dPrint("found in " + configFile + " value=" + factoryClassName); return newInstance(factoryClassName, null, true); } + } catch (Exception ex) { + if (debug) { + ex.printStackTrace(); } } // Try Jar Service Provider Mechanism ! Object provider = findServiceProvider(factoryClass, fallbackClassName); if (provider != null) { return provider; } if (fallbackClassName == null) { ! throw new FactoryConfigurationError( "Provider for " + factoryId + " cannot be found", null); } dPrint("loaded from fallback value: " + fallbackClassName); return newInstance(fallbackClassName, cl, true); } /* ! * Try to find a provider using Service Loader * * @return instance of provider class if found or null */ ! private static Object findServiceProvider(final Class factoryClass, final String fallbackClassName) ! throws FactoryConfigurationError { try { ! return AccessController.doPrivileged(new PrivilegedAction() { ! public Object run() { ! Object defaultProvider = null; ! for (Object factory : ServiceLoader.load(factoryClass)) { ! if (factory.getClass().getName().equals(fallbackClassName)) { ! defaultProvider = factory; ! } else { ! return factory; } } ! if (defaultProvider != null) { ! return defaultProvider; } return null; } ! }); ! } catch (ServiceConfigurationError e) { ! FactoryConfigurationError err = new FactoryConfigurationError((Exception) e.getCause(), e.getMessage()); ! err.initCause(e); ! throw err; ! //throw new FactoryConfigurationError((Exception) e.getCause(), e.getMessage()); } } }