SlotTable.java revision 608:7e06bf1dcb09 
1/*
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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
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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
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24 */
25
26package com.sun.corba.se.impl.interceptors;
27
28import com.sun.corba.se.impl.corba.AnyImpl;
29import com.sun.corba.se.spi.orb.ORB;
30import org.omg.PortableInterceptor.Current;
31import org.omg.PortableInterceptor.InvalidSlot;
32import org.omg.CORBA.Any;
33
34/**
35 * SlotTable is used internally by PICurrent to store the slot information.
36 */
37public 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}
108