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ExprResult.h
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00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is TransforMiiX XSLT processor code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * The MITRE Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1999
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Keith Visco <kvisco@ziplink.net> (Original Author)
00024  *   Larry Fitzpatrick, OpenText <lef@opentext.com>
00025  *
00026  * Alternatively, the contents of this file may be used under the terms of
00027  * either the GNU General Public License Version 2 or later (the "GPL"), or
00028  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00029  * in which case the provisions of the GPL or the LGPL are applicable instead
00030  * of those above. If you wish to allow use of your version of this file only
00031  * under the terms of either the GPL or the LGPL, and not to allow others to
00032  * use your version of this file under the terms of the MPL, indicate your
00033  * decision by deleting the provisions above and replace them with the notice
00034  * and other provisions required by the GPL or the LGPL. If you do not delete
00035  * the provisions above, a recipient may use your version of this file under
00036  * the terms of any one of the MPL, the GPL or the LGPL.
00037  *
00038  * ***** END LICENSE BLOCK ***** */
00039 
00040 #ifndef TRANSFRMX_EXPRRESULT_H
00041 #define TRANSFRMX_EXPRRESULT_H
00042 
00043 #include "nsString.h"
00044 #include "nsAutoPtr.h"
00045 #include "txCore.h"
00046 #include "txResultRecycler.h"
00047 
00048 /*
00049  * ExprResult
00050  *
00051  * Classes Represented:
00052  * BooleanResult, ExprResult, NumberResult, StringResult
00053  *
00054  * Note: for NodeSet, see NodeSet.h
00055 */
00056 
00057 class txAExprResult : public TxObject
00058 {
00059 public:
00060     friend class txResultRecycler;
00061     enum ResultType {
00062         NODESET,
00063         BOOLEAN,
00064         NUMBER,
00065         STRING,
00066         RESULT_TREE_FRAGMENT
00067     };
00068 
00069     txAExprResult(txResultRecycler* aRecycler) : mRecycler(aRecycler) {}
00070     virtual ~txAExprResult() {};
00071 
00072     void AddRef()
00073     {
00074         ++mRefCnt;
00075     }
00076     
00077     void Release(); // Implemented in txResultRecycler.cpp
00078 
00083     virtual short getResultType()      = 0;
00084 
00089     virtual void stringValue(nsAString& str) = 0;
00090 
00095     virtual nsAString* stringValuePointer() = 0;
00096 
00101     virtual MBool booleanValue()          = 0;
00102 
00107     virtual double numberValue()          = 0;
00108 
00109 private:
00110     nsAutoRefCnt mRefCnt;
00111     nsRefPtr<txResultRecycler> mRecycler;
00112 };
00113 
00114 #define TX_DECL_EXPRRESULT                                        \
00115     virtual short getResultType();                                \
00116     virtual void stringValue(nsAString& str);                     \
00117     virtual nsAString* stringValuePointer();                      \
00118     virtual PRBool booleanValue();                                \
00119     virtual double numberValue();                                 \
00120 
00121 
00122 class BooleanResult : public txAExprResult {
00123 
00124 public:
00125     BooleanResult(MBool aValue);
00126 
00127     TX_DECL_EXPRRESULT
00128 
00129 private:
00130     MBool value;
00131 };
00132 
00133 class NumberResult : public txAExprResult {
00134 
00135 public:
00136     NumberResult(double aValue, txResultRecycler* aRecycler);
00137 
00138     TX_DECL_EXPRRESULT
00139 
00140     double value;
00141 
00142 };
00143 
00144 
00145 class StringResult : public txAExprResult {
00146 public:
00147     StringResult(txResultRecycler* aRecycler);
00148     StringResult(const nsAString& aValue, txResultRecycler* aRecycler);
00149 
00150     TX_DECL_EXPRRESULT
00151 
00152     nsString mValue;
00153 };
00154 
00155 #endif
00156