From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- .../beans/encoder/ClassPersistenceDelegate.java | 80 ++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 libjava/classpath/gnu/java/beans/encoder/ClassPersistenceDelegate.java (limited to 'libjava/classpath/gnu/java/beans/encoder/ClassPersistenceDelegate.java') diff --git a/libjava/classpath/gnu/java/beans/encoder/ClassPersistenceDelegate.java b/libjava/classpath/gnu/java/beans/encoder/ClassPersistenceDelegate.java new file mode 100644 index 000000000..1430a6dbe --- /dev/null +++ b/libjava/classpath/gnu/java/beans/encoder/ClassPersistenceDelegate.java @@ -0,0 +1,80 @@ +/* ClassPersistenceDelegate.java - A PersistenceDelegate for the Class type. + Copyright (C) 2005 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 gnu.java.beans.encoder; + +import java.beans.Encoder; +import java.beans.Expression; +import java.beans.PersistenceDelegate; + +/**

The ClassPersistenceDelegate creates + * Expression instances which denote class resolutions.

+ * + *

The class resolution is always the last step when serializing a tree + * of objects. Due to the recursive nature of the algorithm we need a way + * to end the recursion. This is achieved by the implementation of this + * {@link instantiate} method. Arbitrary classes are described with a call + * to Class.forName. However for the Class class + * we call getClass() on a String.class instance. + * This in turn lead to the resolution of the String class which is always + * encoded as "".getClass(). Finally the Encoder + * treats strings in a special way so that the recursion ends here. + * + * @author Robert Schuster (robertschuster@fsfe.org) + */ +public class ClassPersistenceDelegate extends PersistenceDelegate +{ + + protected Expression instantiate(Object oldInstance, Encoder out) + { + Class oldClass = (Class) oldInstance; + + // Due to the special handling of String instances in the Encoder + // this Expression does not lead to further class resolutions. + if (oldClass == String.class) + return new Expression(oldClass, "", "getClass", null); + + // This Expression will lead to the class resolution of String.class. + if (oldClass == Class.class) + return new Expression(oldClass, String.class, "getClass", null); + + // This Expression will lead to the class resolution of Class.class. + return new Expression(oldClass, Class.class, "forName", + new Object[] { oldClass.getName() }); + } + +} -- cgit v1.2.3