| /* IDLTypeHelper.java -- |
| 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.CORBA.CDR; |
| |
| import gnu.CORBA.Minor; |
| |
| import org.omg.CORBA.MARSHAL; |
| import org.omg.CORBA.portable.BoxedValueHelper; |
| import org.omg.CORBA.portable.InputStream; |
| import org.omg.CORBA.portable.OutputStream; |
| |
| import java.io.Serializable; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| |
| /** |
| * Handles case when the CORBA IDL type with the known helper is wrapped into |
| * Value type. |
| * |
| * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) |
| */ |
| public class IDLTypeHelper |
| implements BoxedValueHelper |
| { |
| /** |
| * A helper class. |
| */ |
| protected Class helper; |
| |
| /** |
| * Argument values for Helper.id(). |
| */ |
| static final Object[] ARGS_ID_V = new Object[0]; |
| |
| /** |
| * Argument types for Helper.id()). |
| */ |
| static final Class[] ARGS_ID = new Class[0]; |
| |
| /** |
| * Argument types for Helper.read. |
| */ |
| static final Class[] ARGS_READ = new Class[] { org.omg.CORBA.portable.InputStream.class }; |
| |
| /** |
| * Create an IDLTypeHelper that works via given helper class. |
| */ |
| public IDLTypeHelper(Class a_helperClass) |
| { |
| helper = a_helperClass; |
| } |
| |
| /** |
| * Get the Id, returned by this helper (use reflection). |
| */ |
| public String get_id() |
| { |
| try |
| { |
| Method m = helper.getMethod("id", ARGS_ID); |
| return (String) m.invoke(null, ARGS_ID_V); |
| } |
| catch (Exception ex) |
| { |
| MARSHAL m = new MARSHAL(msg() + " id()"); |
| m.minor = Minor.Boxed; |
| m.initCause(ex); |
| throw m; |
| } |
| } |
| |
| /** |
| * Read an instance from the stream. |
| */ |
| public Serializable read_value(InputStream input) |
| { |
| try |
| { |
| Method m = helper.getMethod("read", ARGS_READ); |
| return (Serializable) m.invoke(null, new Object[] { input }); |
| } |
| catch (Exception ex) |
| { |
| MARSHAL m = new MARSHAL(msg() + " read(..)"); |
| m.minor = Minor.Boxed; |
| m.initCause(ex); |
| throw m; |
| } |
| } |
| |
| /** |
| * Write the instance to the stream. |
| */ |
| public void write_value(OutputStream output, Serializable value) |
| { |
| try |
| { |
| Method[] m = helper.getMethods(); |
| |
| for (int i = 0; i < m.length; i++) |
| { |
| if (m[i].getName().equals("write") |
| && ((m[i].getModifiers() & Modifier.STATIC) != 0)) |
| { |
| Class[] p = m[i].getParameterTypes(); |
| |
| if (p.length == 2 && OutputStream.class.isAssignableFrom(p[0]) |
| && p[1].isAssignableFrom(value.getClass())) |
| { |
| m[i].invoke(null, new Object[] { output, value }); |
| return; |
| } |
| } |
| } |
| } |
| catch (Exception ex) |
| { |
| MARSHAL m = new MARSHAL(msg() + " write(..)"); |
| m.minor = Minor.Boxed; |
| m.initCause(ex); |
| throw m; |
| } |
| } |
| |
| /** |
| * Create the start of message for exceptions. |
| */ |
| String msg() |
| { |
| return "Failed calling " + helper.getName() + " method: "; |
| } |
| |
| } |