mirror of
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132 lines
3.0 KiB
C++
132 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef TRANSFRMX_EXPRRESULT_H
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#define TRANSFRMX_EXPRRESULT_H
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#include "nsString.h"
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#include "nsAutoPtr.h"
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#include "txCore.h"
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#include "txResultRecycler.h"
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/*
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* ExprResult
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*
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* Classes Represented:
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* BooleanResult, ExprResult, NumberResult, StringResult
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*
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* Note: for NodeSet, see NodeSet.h
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*/
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class txAExprResult
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{
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public:
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friend class txResultRecycler;
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// Update txLiteralExpr::getReturnType and sTypes in txEXSLTFunctions.cpp if
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// this enum is changed.
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enum ResultType {
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NODESET = 0,
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BOOLEAN,
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NUMBER,
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STRING,
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RESULT_TREE_FRAGMENT
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};
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explicit txAExprResult(txResultRecycler* aRecycler) : mRecycler(aRecycler)
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{
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}
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virtual ~txAExprResult()
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{
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}
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void AddRef()
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{
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++mRefCnt;
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NS_LOG_ADDREF(this, mRefCnt, "txAExprResult", sizeof(*this));
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}
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void Release(); // Implemented in txResultRecycler.cpp
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/**
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* Returns the type of ExprResult represented
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* @return the type of ExprResult represented
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**/
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virtual short getResultType() = 0;
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/**
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* Creates a String representation of this ExprResult
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* @param aResult the destination string to append the String
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* representation to.
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**/
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virtual void stringValue(nsString& aResult) = 0;
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/**
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* Returns a pointer to the stringvalue if possible. Otherwise null is
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* returned.
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*/
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virtual const nsString* stringValuePointer() = 0;
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/**
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* Converts this ExprResult to a Boolean (bool) value
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* @return the Boolean value
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**/
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virtual bool booleanValue() = 0;
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/**
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* Converts this ExprResult to a Number (double) value
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* @return the Number value
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**/
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virtual double numberValue() = 0;
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private:
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nsAutoRefCnt mRefCnt;
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nsRefPtr<txResultRecycler> mRecycler;
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};
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#define TX_DECL_EXPRRESULT \
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virtual short getResultType(); \
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virtual void stringValue(nsString& aString); \
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virtual const nsString* stringValuePointer(); \
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virtual bool booleanValue(); \
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virtual double numberValue(); \
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class BooleanResult : public txAExprResult {
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public:
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explicit BooleanResult(bool aValue);
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TX_DECL_EXPRRESULT
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private:
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bool value;
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};
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class NumberResult : public txAExprResult {
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public:
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NumberResult(double aValue, txResultRecycler* aRecycler);
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TX_DECL_EXPRRESULT
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double value;
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};
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class StringResult : public txAExprResult {
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public:
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explicit StringResult(txResultRecycler* aRecycler);
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StringResult(const nsAString& aValue, txResultRecycler* aRecycler);
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TX_DECL_EXPRRESULT
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nsString mValue;
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};
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#endif
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