1 /* 2 * Copyright (c) 1999, 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 * COMPONENT_NAME: idl.parser 27 * 28 * ORIGINS: 27 29 * 30 * Licensed Materials - Property of IBM 31 * 5639-D57 (C) COPYRIGHT International Business Machines Corp. 1997, 1999 32 * RMI-IIOP v1.0 33 * 34 */ 35 36 package com.sun.tools.corba.se.idl; 37 38 // NOTES: 39 40 import java.io.PrintWriter; 41 import java.util.Enumeration; 42 import java.util.Hashtable; 43 import java.util.Vector; 44 45 /** 46 * This is the symbol table entry for forward declarations of interfaces. 47 **/ 48 public class ForwardEntry extends SymtabEntry implements InterfaceType 49 { 50 protected ForwardEntry () 51 { 52 super (); 53 } // ctor 54 55 protected ForwardEntry (ForwardEntry that) 56 { 57 super (that); 58 } // ctor 59 60 protected ForwardEntry (SymtabEntry that, IDLID clone) 61 { 62 super (that, clone); 63 if (module ().equals ("")) 64 module (name ()); 65 else if (!name ().equals ("")) 66 module (module () + "/" + name ()); 67 } // ctor 68 69 public Object clone () 70 { 71 return new ForwardEntry (this); 72 } // clone 73 74 /** Invoke the forward declaration generator. 75 @param symbolTable the symbol table is a hash table whose key is 76 a fully qualified type name and whose value is a SymtabEntry or 77 a subclass of SymtabEntry. 78 @param stream the stream to which the generator should sent its output. 79 @see SymtabEntry */ 80 public void generate (Hashtable symbolTable, PrintWriter stream) 81 { 82 forwardGen.generate (symbolTable, this, stream); 83 } // generate 84 85 /** Access the interface generator. 86 @return an object which implements the InterfaceGen interface. 87 @see InterfaceGen */ 88 public Generator generator () 89 { 90 return forwardGen; 91 } // generator 92 93 static boolean replaceForwardDecl (InterfaceEntry interfaceEntry) 94 { 95 boolean result = true; 96 try 97 { 98 ForwardEntry forwardEntry = 99 (ForwardEntry)Parser.symbolTable.get (interfaceEntry.fullName ()); 100 if ( forwardEntry != null ) 101 { 102 result = (interfaceEntry.getInterfaceType () == 103 forwardEntry.getInterfaceType ()); 104 forwardEntry.type (interfaceEntry); 105 106 // If this interface has been forward declared, there are probably 107 // other interfaces which derive from a ForwardEntry. Replace 108 // those ForwardEntry's with this InterfaceEntry: 109 interfaceEntry.forwardedDerivers = forwardEntry.derivers; 110 for ( Enumeration derivers = forwardEntry.derivers.elements(); 111 derivers.hasMoreElements(); ) 112 ((InterfaceEntry)derivers.nextElement ()).replaceForwardDecl (forwardEntry, interfaceEntry); 113 114 // Replace the entry's whose types are forward declarations: 115 for ( Enumeration types = forwardEntry.types.elements (); 116 types.hasMoreElements (); ) 117 ((SymtabEntry)types.nextElement ()).type (interfaceEntry); 118 } 119 } 120 catch (Exception exception) 121 {} 122 return result; 123 } // replaceForwardDecl 124 125 /////////////// 126 // Implement interface InterfaceType 127 128 public int getInterfaceType () 129 { 130 return _type; 131 } 132 133 public void setInterfaceType (int type) 134 { 135 _type = type; 136 } 137 138 static ForwardGen forwardGen; 139 Vector derivers = new Vector (); // Vector of InterfaceEntry's. 140 Vector types = new Vector (); // Vector of the entry's whose type is a forward declaration. 141 private int _type = InterfaceType.NORMAL; // interface type 142 } // class ForwardEntry