1 /*
   2  * Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.corba.se.impl.interceptors;
  27 
  28 import com.sun.corba.se.impl.corba.AnyImpl;
  29 import com.sun.corba.se.spi.orb.ORB;
  30 import org.omg.PortableInterceptor.Current;
  31 import org.omg.PortableInterceptor.InvalidSlot;
  32 import org.omg.CORBA.Any;
  33 
  34 /**
  35  * SlotTable is used internally by PICurrent to store the slot information.
  36  */
  37 public class SlotTable {
  38     // The vector where all the slot data for the current thread is stored
  39     private Any[] theSlotData;
  40 
  41     // Required for instantiating Any object.
  42     private ORB orb;
  43 
  44     // The flag to check whether there are any updates in the current SlotTable.
  45     // The slots will be reset to null, only if this flag is set.
  46     private boolean dirtyFlag;
  47 
  48     /**
  49      * The constructor instantiates an Array of Any[] of size given by slotSize
  50      * parameter.
  51      */
  52     SlotTable( ORB orb, int slotSize ) {
  53         dirtyFlag = false;
  54         this.orb = orb;
  55         theSlotData = new Any[slotSize];
  56     }
  57 
  58     /**
  59      * This method sets the slot data at the given slot id (index).
  60      */
  61     public void set_slot( int id, Any data ) throws InvalidSlot
  62     {
  63         // First check whether the slot is allocated
  64         // If not, raise the invalid slot exception
  65         if( id >= theSlotData.length ) {
  66             throw new InvalidSlot();
  67         }
  68         dirtyFlag = true;
  69         theSlotData[id] = data;
  70     }
  71 
  72     /**
  73      * This method get the slot data for the given slot id (index).
  74      */
  75     public Any get_slot( int id ) throws InvalidSlot
  76     {
  77         // First check whether the slot is allocated
  78         // If not, raise the invalid slot exception
  79         if( id >= theSlotData.length ) {
  80             throw new InvalidSlot();
  81         }
  82         if( theSlotData[id] == null ) {
  83             theSlotData [id] = new AnyImpl(orb);
  84         }
  85         return theSlotData[ id ];
  86     }
  87 
  88 
  89     /**
  90      * This method resets all the slot data to null if dirtyFlag is set.
  91      */
  92     void resetSlots( ) {
  93         if( dirtyFlag == true ) {
  94             for( int i = 0; i < theSlotData.length; i++ ) {
  95                 theSlotData[i] = null;
  96             }
  97         }
  98     }
  99 
 100     /**
 101      * This method returns the size of the allocated slots.
 102      */
 103     int getSize( ) {
 104         return theSlotData.length;
 105     }
 106 
 107 }