Initial revision

From-SVN: r102074

libjava/classpath/gnu/java/beans/decoder/AbstractObjectContext.java

@@ -0,0 +1,127 @@
+/* gnu.java.beans.decoder.AbstractObjectContext
+   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., 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.decoder;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+/** AbstractObjectContext is the base for all Context implementations which
+ * create or provide a result object during their lifetime.
+ *
+ * <p>This class provides the implementation for an indexed get and set method.
+ * But this does not mean that the result object supports these operation.</p>
+ *
+ * @author Robert Schuster
+ *
+ */
+abstract class AbstractObjectContext extends AbstractContext
+{
+    protected Object object;
+
+    AbstractObjectContext()
+    {}
+
+    /** Sets the result object of the Context.
+     *
+     * @param obj The result object to be set.
+     */
+    protected final void setObject(Object obj)
+    {
+        object = obj;
+    }
+
+    /* (non-Javadoc)
+     * @see gnu.java.beans.decoder.Context#set(int, java.lang.Object)
+     */
+    public final void set(int index, Object o) throws AssemblyException
+    {
+        try
+        {
+            Method method =
+                object.getClass().getMethod(
+                    "set",
+                    new Class[] { Integer.TYPE, Object.class });
+
+            method.invoke(object, new Object[] { new Integer(index), o });
+        }
+        catch (NoSuchMethodException nsme)
+        {
+            throw new AssemblyException(nsme);
+        }
+        catch (InvocationTargetException ite)
+        {
+            throw new AssemblyException(ite.getCause());
+        }
+        catch (IllegalAccessException iae)
+        {
+            throw new AssemblyException(iae);
+        }
+    }
+
+    /* (non-Javadoc)
+     * @see gnu.java.beans.decoder.Context#get(int)
+     */
+    public final Object get(int index) throws AssemblyException
+    {
+        try
+        {
+            Method method =
+                object.getClass().getMethod(
+                    "get",
+                    new Class[] { Integer.TYPE });
+
+            return method.invoke(object, new Object[] { new Integer(index)});
+        }
+        catch (NoSuchMethodException nsme)
+        {
+            throw new AssemblyException(nsme);
+        }
+        catch (InvocationTargetException ite)
+        {
+            throw new AssemblyException(ite.getCause());
+        }
+        catch (IllegalAccessException iae)
+        {
+            throw new AssemblyException(iae);
+        }
+    }
+
+    public final Object getResult()
+    {
+        return object;
+    }
+}