Initial revision

From-SVN: r102074

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

@@ -0,0 +1,102 @@
+/* gnu.java.beans.decoder.ConstructorContext
+   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.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.util.ArrayList;
+
+/** A ConstructorContext is a {@link Context} implementation which collects the parameters for a constructor
+ * call and instantiates the result object using that constructor. After that sub-contexts can invoke
+ * methods on the result object.
+ *
+ * <p>The constructor is invoked when a sub-context is a statement or the Context ends.</p>
+ *
+ * @author Robert Schuster
+ */
+class ConstructorContext extends AbstractCreatableObjectContext
+{
+  private ArrayList arguments = new ArrayList();
+  private Class klass;
+
+  ConstructorContext(String id, Class newClass)
+  {
+    setId(id);
+    // sets superclass field 
+    klass = newClass;
+  }
+
+  /* (non-Javadoc)
+   * @see gnu.java.beans.decoder.Context#addObject(java.lang.Object)
+   */
+  protected void addParameterObjectImpl(Object o)
+  {
+    arguments.add(o);
+  }
+
+  protected Object createObject(Context outerContext)
+    throws AssemblyException
+  {
+    Object[] args = arguments.toArray();
+
+    try
+      {
+	Constructor constructor = MethodFinder.getConstructor(klass, args);
+
+	// instantiates object (klass field gets re-set by superclass)
+	return constructor.newInstance(args);
+      }
+    catch (NoSuchMethodException nsme)
+      {
+	throw new AssemblyException(nsme);
+      }
+    catch (InvocationTargetException ite)
+      {
+	throw new AssemblyException(ite.getCause());
+      }
+    catch (IllegalAccessException iae)
+      {
+	throw new AssemblyException(iae);
+      }
+    catch (InstantiationException ie)
+      {
+	throw new AssemblyException(ie);
+      }
+  }
+  
+}