libjava/classpath/org/omg/CORBA/PolicyHelper.java

   1 /* PolicyHelper.java --
   2    Copyright (C) 2005 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package org.omg.CORBA;
  40
  41 import gnu.CORBA.Minor;
  42
  43 import org.omg.CORBA.Any;
  44 import org.omg.CORBA.BAD_OPERATION;
  45 import org.omg.CORBA.ORB;
  46 import org.omg.CORBA.StructMember;
  47 import org.omg.CORBA.TCKind;
  48 import org.omg.CORBA.TypeCode;
  49 import org.omg.CORBA.portable.Delegate;
  50 import org.omg.CORBA.portable.InputStream;
  51 import org.omg.CORBA.portable.ObjectImpl;
  52 import org.omg.CORBA.portable.OutputStream;
  53
  54 /**
  55 * The helper operations for the
  56 * CORBA object {@link Policy}.
  57 *
  58 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
  59 */
  60 public abstract class PolicyHelper
  61 {
  62   /**
  63    * The cached {@link Policy} typecode, computed once.
  64    */
  65   private static TypeCode typeCode;
  66
  67   /**
  68    * Get the type code of the {@link Policy}.
  69    *
  70    * @return interface typecode, named "Policy".
  71    */
  72   public static TypeCode type()
  73   {
  74     if (typeCode == null)
  75       typeCode = ORB.init().create_interface_tc(id(), "Policy");
  76     return typeCode;
  77   }
  78
  79   /**
  80    * Insert the Policy into the given Any.
  81    *
  82    * @param any the Any to insert into.
  83    * @param that the Policy to insert.
  84    */
  85   public static void insert(Any any, Policy that)
  86   {
  87     any.insert_Streamable(new PolicyHolder(that));
  88   }
  89
  90   /**
  91    * Extract the Policy from given Any.
  92    *
  93    * @throws BAD_OPERATION if the passed Any does not contain Policy.
  94    */
  95   public static Policy extract(Any any)
  96   {
  97     try
  98       {
  99         PolicyHolder h = (PolicyHolder) any.extract_Streamable();
 100         return h.value;
 101       }
 102     catch (ClassCastException ex)
 103       {
 104         BAD_OPERATION bad = new BAD_OPERATION("Policy expected");
 105         bad.minor = Minor.Any;
 106         throw bad;
 107       }
 108   }
 109
 110   /**
 111    * Get the Policy repository id.
 112    *
 113    * @return "IDL:omg.org/CORBA/Policy:1.0", always.
 114    */
 115   public static String id()
 116   {
 117     return "IDL:omg.org/CORBA/Policy:1.0";
 118   }
 119
 120   /**
 121    * Cast the passed object into the Policy. If the
 122    * object has a different java type, create an instance
 123    * of the _PolicyStub, using the same delegate, as for
 124    * the passed parameter. Hence, unlike java type cast,
 125    * this method may return a different object, than has been passed.
 126    *
 127    * @param obj the object to narrow.
 128    * @return narrowed instance.
 129    * @throws BAD_PARAM if the passed object is not a Policy.
 130    */
 131   public static Policy narrow(org.omg.CORBA.Object obj)
 132   {
 133     if (obj == null)
 134       return null;
 135     else if (obj instanceof Policy)
 136       return (Policy) obj;
 137     else
 138       {
 139         // Check for the policy id cannot be performed because
 140         // this helper must read various subclasses of the Policy,
 141         // and the IOR profile currently supports only one id.
 142
 143         Delegate delegate = ((ObjectImpl) obj)._get_delegate();
 144         return new _PolicyStub(delegate);
 145       }
 146   }
 147
 148   /**
 149    * Read the object from the CDR intput stream (IOR profile expected).
 150    *
 151    * @param input a org.omg.CORBA.portable stream to read from.
 152    */
 153   public static Policy read(InputStream input)
 154   {
 155     return narrow(input.read_Object());
 156   }
 157
 158   /**
 159    * Write the object to the CDR output stream (as IOR profile).
 160    *
 161    * @param output a org.omg.CORBA.portable stream stream to write into.
 162    * @param value a value to write.
 163    */
 164   public static void write(OutputStream output, Policy value)
 165   {
 166     output.write_Object(value);
 167   }
 168 }