gomp-20050608-branch/libjava/classpath/gnu/CORBA/_PolicyImplBase.java

   1 /* _PolicyImplBase.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 gnu.CORBA;
  40
  41 import org.omg.CORBA.BAD_OPERATION;
  42 import org.omg.CORBA.CompletionStatus;
  43 import org.omg.CORBA.Policy;
  44 import org.omg.CORBA.PolicyHelper;
  45 import org.omg.CORBA.portable.InputStream;
  46 import org.omg.CORBA.portable.InvokeHandler;
  47 import org.omg.CORBA.portable.ObjectImpl;
  48 import org.omg.CORBA.portable.OutputStream;
  49 import org.omg.CORBA.portable.ResponseHandler;
  50
  51 /**
  52  * The server side implementation base for the {@link Policy}.
  53  *
  54  * @specnote The java 1.4 API does not define the server side policy
  55  * implementation base, but it defines the policy client side stub.
  56  * As these two classes always work together, and even no separate testing is
  57  * possible, the required implementation base is provided in gnu.CORBA
  58  * namespace. Sun will probably include they base in the future java APIs.
  59  *
  60  * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
  61  */
  62 public abstract class _PolicyImplBase
  63   extends ObjectImpl
  64   implements Policy, InvokeHandler
  65 {
  66   /**
  67    * Use serialVersionUID for interoperability.
  68    */
  69   private static final long serialVersionUID = 1;
  70
  71   /**
  72    * The policy repository ids.
  73    */
  74   private final String[] ids;
  75
  76   /**
  77    * The type of this policy.
  78    */
  79   private final int type;
  80
  81   /**
  82    * The value of this policy. The value object is never the same
  83    * for different policies.
  84    */
  85   private final java.lang.Object value;
  86
  87   /**
  88    * The policy integer code, written in request to write
  89    * the policy value.
  90    */
  91   private final int policyCode;
  92
  93   /**
  94    * Create the new policy of the given type, having the given value.
  95    * For security reasons, the method is kept package private.
  96    *
  97    * @param p_type the type of this policy.
  98    * @param p_value the value of this policy.
  99    * @param p_code the integer code of this policy.
 100    * @param p_idl the policy IDL type string. The {@link #_ids()}
 101    * will return array, first line being this string and another
 102    * being PolicyHelper.id().
 103    */
 104   public _PolicyImplBase(int p_type, java.lang.Object p_value, int p_code,
 105                          String p_idl
 106                         )
 107   {
 108     type = p_type;
 109     value = p_value;
 110     policyCode = p_code;
 111     ids = new String[] { p_idl, PolicyHelper.id() };
 112   }
 113
 114   /**
 115    * Get the integer code of the type of this policy.
 116    */
 117   public final int policy_type()
 118   {
 119     return type;
 120   }
 121
 122   /**
 123    * Return the list of repository ids.
 124    */
 125   public final String[] _ids()
 126   {
 127     return ids;
 128   }
 129
 130   /**
 131    * Call the required method.
 132    */
 133   public final OutputStream _invoke(String method, InputStream input,
 134                                     ResponseHandler rh
 135                                    )
 136   {
 137     OutputStream output = null;
 138
 139     if (method.equals("destroy"))
 140       {
 141         // The "destroy" has been invoked.
 142         destroy();
 143         output = rh.createReply();
 144       }
 145     else if (method.equals("copy"))
 146       {
 147         // The "copy" has been invoked.
 148         org.omg.CORBA.Object returns = copy();
 149         output = rh.createReply();
 150         output.write_Object(this);
 151       }
 152     else if (method.equals("policy_type"))
 153       {
 154         // The "policy_type" has been invoked.
 155         int returns = policy_type();
 156         output = rh.createReply();
 157         output.write_long(returns);
 158       }
 159     else if (method.equals("value"))
 160       {
 161         // The "value" can be invoked on the children types
 162         // and must return an integer, representing the policy value
 163         // (CORBA enumeration).
 164         output = rh.createReply();
 165         output.write_long(policyCode);
 166       }
 167     else
 168       throw new BAD_OPERATION(method, Minor.Method,
 169         CompletionStatus.COMPLETED_MAYBE);
 170
 171     return output;
 172   }
 173
 174   /**
 175    * Get the value of this policy
 176    */
 177   public final java.lang.Object getValue()
 178   {
 179     return value;
 180   }
 181
 182   /**
 183    * Get the integer code of this policy value.
 184    */
 185   public final int getCode()
 186   {
 187     return policyCode;
 188   }
 189
 190   /**
 191    * Returns without action. It is a work of garbage collector
 192    * to remove the unused objects.
 193    */
 194   public final void destroy()
 195   {
 196   }
 197
 198   /**
 199    * Returns the string representation of the given policy.
 200    */
 201   public final String toString()
 202   {
 203     return value.toString();
 204   }
 205
 206   /**
 207    * Create a copy of this policy. The object is not mutable, so
 208    * <code>this</code> can be returned.
 209    *
 210    * @return <code>this</code>
 211    */
 212   public Policy copy()
 213   {
 214     return this;
 215   }
 216
 217   /**
 218    * Use the value to get a hash code.
 219    */
 220   public int hashCode()
 221   {
 222     return getValue().hashCode();
 223   }
 224
 225   /**
 226    * Check the values for equality.
 227    */
 228   public boolean equals(Object x)
 229   {
 230     return x == null ? false : getValue().equals(x);
 231   }
 232 }