001    /* PolicyHelper.java --
002       Copyright (C) 2005, 2006 Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010    
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    
039    package org.omg.CORBA;
040    
041    import gnu.CORBA.Minor;
042    import gnu.CORBA.OrbRestricted;
043    
044    import org.omg.CORBA.Any;
045    import org.omg.CORBA.BAD_OPERATION;
046    import org.omg.CORBA.TypeCode;
047    import org.omg.CORBA.portable.Delegate;
048    import org.omg.CORBA.portable.InputStream;
049    import org.omg.CORBA.portable.ObjectImpl;
050    import org.omg.CORBA.portable.OutputStream;
051    
052    /**
053    * The helper operations for the
054    * CORBA object {@link Policy}.
055    *
056    * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
057    */
058    public abstract class PolicyHelper
059    {
060      /**
061       * Get the type code of the {@link Policy}.
062       *
063       * @return interface typecode, named "Policy".
064       */
065      public static TypeCode type()
066      {
067        return OrbRestricted.Singleton.create_interface_tc(id(), "Policy");
068      }
069    
070      /**
071       * Insert the Policy into the given Any.
072       *
073       * @param any the Any to insert into.
074       * @param that the Policy to insert.
075       */
076      public static void insert(Any any, Policy that)
077      {
078        any.insert_Streamable(new PolicyHolder(that));
079      }
080    
081      /**
082       * Extract the Policy from given Any.
083       *
084       * @throws BAD_OPERATION if the passed Any does not contain Policy.
085       */
086      public static Policy extract(Any any)
087      {
088        try
089          {
090            PolicyHolder h = (PolicyHolder) any.extract_Streamable();
091            return h.value;
092          }
093        catch (ClassCastException ex)
094          {
095            BAD_OPERATION bad = new BAD_OPERATION("Policy expected");
096            bad.minor = Minor.Any;
097            throw bad;
098          }
099      }
100    
101      /**
102       * Get the Policy repository id.
103       *
104       * @return "IDL:omg.org/CORBA/Policy:1.0", always.
105       */
106      public static String id()
107      {
108        return "IDL:omg.org/CORBA/Policy:1.0";
109      }
110    
111      /**
112       * Cast the passed object into the Policy. If the
113       * object has a different java type, create an instance
114       * of the _PolicyStub, using the same delegate, as for
115       * the passed parameter. Hence, unlike java type cast,
116       * this method may return a different object, than has been passed.
117       *
118       * @param obj the object to narrow.
119       * @return narrowed instance.
120       * @throws BAD_PARAM if the passed object is not a Policy.
121       */
122      public static Policy narrow(org.omg.CORBA.Object obj)
123      {
124        if (obj == null)
125          return null;
126        else if (obj instanceof Policy)
127          return (Policy) obj;
128        else
129          {
130            // Check for the policy id cannot be performed because
131            // this helper must read various subclasses of the Policy,
132            // and the IOR profile currently supports only one id.
133    
134            Delegate delegate = ((ObjectImpl) obj)._get_delegate();
135            return new _PolicyStub(delegate);
136          }
137      }
138    
139      /**
140       * Read the object from the CDR intput stream (IOR profile expected).
141       *
142       * @param input a org.omg.CORBA.portable stream to read from.
143       */
144      public static Policy read(InputStream input)
145      {
146        return narrow(input.read_Object());
147      }
148    
149      /**
150       * Write the object to the CDR output stream (as IOR profile).
151       *
152       * @param output a org.omg.CORBA.portable stream stream to write into.
153       * @param value a value to write.
154       */
155      public static void write(OutputStream output, Policy value)
156      {
157        output.write_Object(value);
158      }
159    }