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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/rmi/server/RMIClassLoader.java | |
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Diffstat (limited to 'libjava/classpath/java/rmi/server/RMIClassLoader.java')
-rw-r--r-- | libjava/classpath/java/rmi/server/RMIClassLoader.java | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/libjava/classpath/java/rmi/server/RMIClassLoader.java b/libjava/classpath/java/rmi/server/RMIClassLoader.java new file mode 100644 index 000000000..f43a68c5b --- /dev/null +++ b/libjava/classpath/java/rmi/server/RMIClassLoader.java @@ -0,0 +1,204 @@ +/* RMIClassLoader.java -- + Copyright (c) 1996, 1997, 1998, 1999, 2002, 2003, 2004 + Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.rmi.server; + +import gnu.classpath.ServiceFactory; +import gnu.classpath.SystemProperties; +import gnu.java.rmi.server.RMIClassLoaderImpl; + +import java.net.MalformedURLException; +import java.net.URL; +import java.util.Iterator; + +/** + * This class provides a set of public static utility methods for supporting + * network-based class loading in RMI. These methods are called by RMI's + * internal marshal streams to implement the dynamic class loading of types for + * RMI parameters and return values. + * @since 1.1 + */ +public class RMIClassLoader +{ + /** + * This class isn't intended to be instantiated. + */ + private RMIClassLoader() {} + + /** + * @deprecated + */ + public static Class<?> loadClass(String name) + throws MalformedURLException, ClassNotFoundException + { + return loadClass("", name); + } + + public static Class<?> loadClass(String codebase, String name) + throws MalformedURLException, ClassNotFoundException + { + RMIClassLoaderSpi spi = getProviderInstance(); + if (spi == null) + spi = getDefaultProviderInstance(); + return spi.loadClass(codebase, name, null); + } + + public static Class<?> loadClass(String codebase, String name, + ClassLoader defaultLoader) + throws MalformedURLException, ClassNotFoundException + { + RMIClassLoaderSpi spi = getProviderInstance(); + if (spi == null) + spi = getDefaultProviderInstance(); + return spi.loadClass(codebase, name, defaultLoader); + } + + public static Class<?> loadProxyClass (String codeBase, String[] interfaces, + ClassLoader defaultLoader) + throws MalformedURLException, ClassNotFoundException + { + RMIClassLoaderSpi spi = getProviderInstance(); + if (spi == null) + spi = getDefaultProviderInstance(); + return spi.loadProxyClass(codeBase, interfaces, defaultLoader); + } + + /** + * Loads a class from <code>codeBase</code>. + * + * This method delegates to + * {@link RMIClassLoaderSpi#loadClass(String, String, ClassLoader)} and + * passes <code>codeBase.toString()</code> as first argument, + * <code>name</code> as second argument and <code>null</code> as third + * argument. + * + * @param codeBase the code base from which to load the class + * @param name the name of the class + * + * @return the loaded class + * + * @throws MalformedURLException if the URL is not well formed + * @throws ClassNotFoundException if the requested class cannot be found + */ + public static Class<?> loadClass(URL codeBase, String name) + throws MalformedURLException, ClassNotFoundException + { + RMIClassLoaderSpi spi = getProviderInstance(); + if (spi == null) + spi = getDefaultProviderInstance(); + return spi.loadClass(codeBase.toString(), name, null); + } + + /** + * Gets a classloader for the given codebase and with the current + * context classloader as parent. + * + * @param codebase + * + * @return a classloader for the given codebase + * + * @throws MalformedURLException if the codebase contains a malformed URL + */ + public static ClassLoader getClassLoader(String codebase) + throws MalformedURLException + { + RMIClassLoaderSpi spi = getProviderInstance(); + if (spi == null) + spi = getDefaultProviderInstance(); + return spi.getClassLoader(codebase); + } + + /** + * Returns a string representation of the network location where a remote + * endpoint can get the class-definition of the given class. + * + * @param cl + * + * @return a space seperated list of URLs where the class-definition + * of cl may be found + */ + public static String getClassAnnotation(Class<?> cl) + { + RMIClassLoaderSpi spi = getProviderInstance(); + if (spi == null) + spi = getDefaultProviderInstance(); + return spi.getClassAnnotation(cl); + } + + /** + * @deprecated + */ + public static Object getSecurityContext (ClassLoader loader) + { + throw new Error ("Not implemented"); + } + + /** + * Returns the default service provider for <code>RMIClassLoader</code>. + * + * @return the default provider for <code>RMIClassLoader</code> + */ + public static RMIClassLoaderSpi getDefaultProviderInstance() + { + return RMIClassLoaderImpl.getInstance(); + } + + /** + * Chooses, instantiates and returns a service provider. + * + * @return a service provider + */ + private static RMIClassLoaderSpi getProviderInstance() + { + // If the user asked for the default, return it. We do a special + // check here because our standard service lookup function does not + // handle this -- nor should it. + String prop = SystemProperties.getProperty("java.rmi.server.RMIClassLoaderSpi"); + if ("default".equals(prop)) + return null; + Iterator it = ServiceFactory.lookupProviders(RMIClassLoaderSpi.class, + null); + if (it == null || ! it.hasNext()) + return null; + // FIXME: the spec says we ought to throw an Error of some kind if + // the specified provider is not suitable for some reason. However + // our service factory simply logs the problem and moves on to the next + // provider in this situation. + return (RMIClassLoaderSpi) it.next(); + } +} |