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| author | Michael Koch <mkoch@gcc.gnu.org> | 2005-02-19 18:47:29 +0000 |
|---|---|---|
| committer | Michael Koch <mkoch@gcc.gnu.org> | 2005-02-19 18:47:29 +0000 |
| commit | 6ca84a804a7378e79bbb1d5a6d646ead7e6cfa46 (patch) | |
| tree | 55ebacd491a20d362082021ef37660e30d015575 /libjava/gnu/java/beans/decoder/ObjectHandler.java | |
| parent | 2cdc207340d10fdbf643ae6b83cb289af1ba32d6 (diff) | |
| download | gcc-6ca84a804a7378e79bbb1d5a6d646ead7e6cfa46.zip gcc-6ca84a804a7378e79bbb1d5a6d646ead7e6cfa46.tar.gz gcc-6ca84a804a7378e79bbb1d5a6d646ead7e6cfa46.tar.bz2 | |
[multiple changes]
2005-02-19 Michael Koch <konqueror@gmx.de>
* Makefile.am: Added new files in gnu/java/beans and
java/beans/XMLDecoder.java.
* Makefile.in: Regenerated.
2005-02-19 Robert Schuster <thebohemian@gmx.net>
* gnu/java/beans/decoder/GrowableArrayContext.java: Fixed
assignment behavior by using java.lang.reflect.Array.set()
directly.
2005-02-19 Dalibor Topic <robilad@kaffe.org>
* gnu/java/beans/EmptyBeanInfo.java,
gnu/java/beans/info/ComponentBeanInfo.java:
Removed unused files.
2005-02-19 Robert Schuster <thebohemian@gmx.net>
* gnu/java/beans/DummyAppletStub.java: Add dummy implementation
of AppletStub for java.beans.Beans.instantiate.
* gnu/java/beans/DummyAppletContext.java: Add dummy implementation
of AppletContext.
* java/beans/Beans: Added 1.4 functionality, fixed user documentation
to be conformant with Javadoc guidelines.
(instantiate): Added two more overloaded variants, reworked user
documentation, fixed exception behavior, fixed behavior when
deserializing null.
2005-02-19 Mark Wielaard <mark@klomp.org>
* gnu/java/beans/decoder/DummyHandler.java: Add return statements for
failing methods.
* gnu/java/beans/decoder/DummyContext.java: Likewise.
2005-02-19 Robert Schuster <theBohemian@gmx.net>
* gnu/java/beans/decoder/AbstractContext.java,
gnu/java/beans/decoder/AbstractCreatableContext.java,
gnu/java/beans/decoder/AbstractElementHandler.java,
gnu/java/beans/decoder/AbstractObjectContext.java,
gnu/java/beans/decoder/ArrayContext.java,
gnu/java/beans/decoder/ArrayHandler.java,
gnu/java/beans/decoder/AssemblyException.java,
gnu/java/beans/decoder/BooleanHandler.java,
gnu/java/beans/decoder/ByteHandler.java,
gnu/java/beans/decoder/CharHandler.java,
gnu/java/beans/decoder/ClassHandler.java,
gnu/java/beans/decoder/ConstructorContext.java,
gnu/java/beans/decoder/Context.java,
gnu/java/beans/decoder/DecoderContext.java,
gnu/java/beans/decoder/DefaultExceptionListener.java,
gnu/java/beans/decoder/DoubleHandler.java,
gnu/java/beans/decoder/DummyContext.java,
gnu/java/beans/decoder/DummyHandler.java,
gnu/java/beans/decoder/ElementHandler.java,
gnu/java/beans/decoder/FloatHandler.java,
gnu/java/beans/decoder/GrowableArrayContext.java,
gnu/java/beans/decoder/IndexContext.java,
gnu/java/beans/decoder/IntHandler.java,
gnu/java/beans/decoder/JavaHandler.java,
gnu/java/beans/decoder/LongHandler.java,
gnu/java/beans/decoder/MethodContext.java,
gnu/java/beans/decoder/MethodFinder.java,
gnu/java/beans/decoder/NullHandler.java,
gnu/java/beans/decoder/ObjectContext.java,
gnu/java/beans/decoder/ObjectHandler.java,
gnu/java/beans/decoder/PersistenceParser.java,
gnu/java/beans/decoder/PropertyContext.java,
gnu/java/beans/decoder/ShortHandler.java,
gnu/java/beans/decoder/SimpleHandler.java,
gnu/java/beans/decoder/StaticMethodContext.java,
gnu/java/beans/decoder/StringHandler.java,
gnu/java/beans/decoder/VoidHandler.java: New class
implementing java.beans.XMLDecoder decoding functionality.
* java/beans/XMLDecoder.java: New class.
From-SVN: r95287
Diffstat (limited to 'libjava/gnu/java/beans/decoder/ObjectHandler.java')
| -rw-r--r-- | libjava/gnu/java/beans/decoder/ObjectHandler.java | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/libjava/gnu/java/beans/decoder/ObjectHandler.java b/libjava/gnu/java/beans/decoder/ObjectHandler.java new file mode 100644 index 0000000..801dc74 --- /dev/null +++ b/libjava/gnu/java/beans/decoder/ObjectHandler.java @@ -0,0 +1,169 @@ +/* gnu.java.beans.decoder.ObjectHandler + Copyright (C) 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., 59 Temple Place, Suite 330, Boston, MA +02111-1307 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.decoder; + +import java.beans.ExceptionListener; + +import org.xml.sax.Attributes; + +/** An ObjectHandler parses the <object> tag and thereby creates various + * Context implementations. + * + * @author Robert Schuster + * + */ +public class ObjectHandler extends AbstractElementHandler +{ + /** + * XXX: Can all results be stored with an object id? + * + * + * @param PersistenceParser + */ + ObjectHandler(ElementHandler parent) + { + super(parent, true); + } + + protected Context startElement(Attributes attributes, ExceptionListener exceptionListener) + throws AssemblyException + { + String className = attributes.getValue("class"); + String methodName = attributes.getValue("method"); + String fieldName = attributes.getValue("field"); + String index = attributes.getValue("index"); + String propertyName = attributes.getValue("property"); + String id = attributes.getValue("id"); + String idRef = attributes.getValue("idref"); + + /* first check if we just want to access an existing object (idref present) + * + * note: <object idref="foo" method="bar"/> is not valid to call method "bar" + * on the object with id "foo". Instead this should return the object "foo" + * itself. The right way to this is: + * <object idref="foo"> + * <object method="bar"/> + * </object> + * + * This means that if idref is present class, method, field, index and + * property are obsolete. + */ + if (idRef != null) + // reactivates an existing object and giving it another name if id exists + return new ObjectContext(id, getObject(idRef)); + + // decides whether we are in a static (className present) or dynamic context + if (className != null) + { + try + { + Class klass = instantiateClass(className); + + // class name exists which means that we are in a static context. + // so we may want to ... + // access a static field if the fieldName exists + if (fieldName != null) + { + try + { + return new ObjectContext(id, + klass.getField(fieldName).get(null)); + } + catch (NoSuchFieldException nsfe) + { + throw new AssemblyException(nsfe); + } + catch (IllegalAccessException iae) + { + throw new AssemblyException(iae); + } + } + + // (falling through is important!) + // run a constructor if methodName is "new" or null + if (methodName == null || methodName.equals("new")) + return new ConstructorContext(id, klass); + + // (falling through is important!) + // run a static method on the given class (if methodName exists, which is implied already) + return new StaticMethodContext(id, klass, methodName); + // XXX: should fail if unexpected attributes are present? + } + catch (ClassNotFoundException cnfe) + { + throw new AssemblyException(cnfe); + } + } + else + { + // className does not exist which means we are in the context of + // some object and want to ... + // access the get(int index) method if index != null + if (index != null) + { + try + { + // Note: http://java.sun.com/products/jfc/tsc/articles/persistence3/ says + // that <void index="4"/> will make up a get()-call. But this is wrong because + // <void/> tags never return values (to the surrounding context) + return new IndexContext(id, Integer.parseInt(index)); + } + catch (NumberFormatException nfe) + { + throw new AssemblyException(nfe); + } + } + + // access a method if methodName exists + if (methodName != null) + return new MethodContext(id, methodName); + + // (falling through is important!) + // access a property if a propertyName exists + if (propertyName != null && propertyName.length() > 0) + // this is reported as an ordinary method access where the propertyName is + // converted into a 'getter'-method name: convert first character of property name + // to upper case and prepend 'get' + // Note: This will be a getter-method because the <object> tag implies that a return + // value is expected. + return new PropertyContext(id, propertyName); + } + + throw new AssemblyException(new IllegalArgumentException("Wrong or missing attributes for <object> tag.")); + } +} |