XMLException.hpp

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
/*
 * $Id$
 */
 
#if !defined(XERCESC_INCLUDE_GUARD_XMLEXCEPTION_HPP)
#define XERCESC_INCLUDE_GUARD_XMLEXCEPTION_HPP
 
#include <xercesc/util/XercesDefs.hpp>
#include <xercesc/util/XMemory.hpp>
#include <xercesc/util/XMLExceptMsgs.hpp>
#include <xercesc/util/XMLUni.hpp>
#include <xercesc/framework/XMLErrorReporter.hpp>
 
XERCES_CPP_NAMESPACE_BEGIN
 
// ---------------------------------------------------------------------------
//  This is the base class from which all the XML parser exceptions are
//  derived. The virtual interface is very simple and most of the functionality
//  is in this class.
//
//  Because all derivatives are EXACTLY the same except for the static
//  string that is used to hold the name of the class, a macro is provided
//  below via which they are all created.
// ---------------------------------------------------------------------------
class XMLUTIL_EXPORT XMLException : public XMemory
{
public:
    // -----------------------------------------------------------------------
    //  Virtual Destructor
    // -----------------------------------------------------------------------
    virtual ~XMLException();
 
 
    // -----------------------------------------------------------------------
    //  The XML exception virtual interface
    // -----------------------------------------------------------------------
    virtual const XMLCh* getType() const = 0;
 
 
    // -----------------------------------------------------------------------
    //  Getter methods
    // -----------------------------------------------------------------------
    XMLExcepts::Codes getCode() const;
    const XMLCh* getMessage() const;
    const char* getSrcFile() const;
    XMLFileLoc getSrcLine() const;
    XMLErrorReporter::ErrTypes getErrorType() const;
 
 
    // -----------------------------------------------------------------------
    //  Setter methods
    // -----------------------------------------------------------------------
    void setPosition(const char* const file, const XMLFileLoc line);
 
 
    // -----------------------------------------------------------------------
    //  Hidden constructors and operators
    //
    //  NOTE:   Technically, these should be protected, since this is a
    //          base class that is never used directly. However, VC++ 6.0 will
    //          fail to catch via a reference to base class if the ctors are
    //          not public!! This seems to have been caused by the install
    //          of IE 5.0.
    // -----------------------------------------------------------------------
    XMLException();
    XMLException(const char* const srcFile, const XMLFileLoc srcLine, MemoryManager* const memoryManager = 0);
    XMLException(const XMLException& toCopy);
    XMLException& operator=(const XMLException& toAssign);
 
protected :
    // -----------------------------------------------------------------------
    //  Protected methods
    // -----------------------------------------------------------------------
    void loadExceptText
    (
        const   XMLExcepts::Codes toLoad
    );
    void loadExceptText
    (
        const   XMLExcepts::Codes toLoad
        , const XMLCh* const        text1
        , const XMLCh* const        text2 = 0
        , const XMLCh* const        text3 = 0
        , const XMLCh* const        text4 = 0
    );
    void loadExceptText
    (
        const   XMLExcepts::Codes toLoad
        , const char* const         text1
        , const char* const         text2 = 0
        , const char* const         text3 = 0
        , const char* const         text4 = 0
    );
 
 
private :
    // -----------------------------------------------------------------------
    //  Data members
    //
    //  fCode
    //      The error code that this exception represents.
    //
    //  fSrcFile
    //  fSrcLine
    //      These are the file and line information from the source where the
    //      exception was thrown from.
    //
    //  fMsg
    //      The loaded message text for this exception.
    // -----------------------------------------------------------------------
    XMLExcepts::Codes       fCode;
    char*                   fSrcFile;
    XMLFileLoc              fSrcLine;
    XMLCh*                  fMsg;
 
protected:
    MemoryManager*          fMemoryManager;
};
 
// ---------------------------------------------------------------------------
//  XMLException: Getter methods
// ---------------------------------------------------------------------------
inline XMLExcepts::Codes XMLException::getCode() const
{
    return fCode;
}
 
inline const XMLCh* XMLException::getMessage() const
{
    return fMsg;
}
 
inline const char* XMLException::getSrcFile() const
{
    if (!fSrcFile)
        return "";
    return fSrcFile;
}
 
inline XMLFileLoc XMLException::getSrcLine() const
{
    return fSrcLine;
}
 
inline XMLErrorReporter::ErrTypes XMLException::getErrorType() const
{
   if ((fCode >= XMLExcepts::W_LowBounds) && (fCode <= XMLExcepts::W_HighBounds))
       return XMLErrorReporter::ErrType_Warning;
   else if ((fCode >= XMLExcepts::F_LowBounds) && (fCode <= XMLExcepts::F_HighBounds))
        return XMLErrorReporter::ErrType_Fatal;
   else if ((fCode >= XMLExcepts::E_LowBounds) && (fCode <= XMLExcepts::E_HighBounds))
        return XMLErrorReporter::ErrType_Error;
   return XMLErrorReporter::ErrTypes_Unknown;
}
 
// ---------------------------------------------------------------------------
//  This macro is used to create derived classes. They are all identical
//  except the name of the exception, so it crazy to type them in over and
//  over.
// ---------------------------------------------------------------------------
#define MakeXMLException(theType, expKeyword) \
class expKeyword theType : public XMLException \
{ \
public: \
 \
    theType(const   char* const         srcFile \
            , const XMLFileLoc          srcLine \
            , const XMLExcepts::Codes toThrow \
            , MemoryManager*            memoryManager = 0) : \
        XMLException(srcFile, srcLine, memoryManager) \
    { \
        loadExceptText(toThrow); \
    } \
 \
    theType(const theType& toCopy) : \
 \
        XMLException(toCopy) \
    { \
    } \
  \
    theType(const   char* const         srcFile \
            , const XMLFileLoc          srcLine \
            , const XMLExcepts::Codes   toThrow \
            , const XMLCh* const        text1 \
            , const XMLCh* const        text2 = 0 \
            , const XMLCh* const        text3 = 0 \
            , const XMLCh* const        text4 = 0 \
            , MemoryManager*            memoryManager = 0) : \
        XMLException(srcFile, srcLine, memoryManager) \
    { \
        loadExceptText(toThrow, text1, text2, text3, text4); \
    } \
 \
    theType(const   char* const         srcFile \
            , const XMLFileLoc          srcLine \
            , const XMLExcepts::Codes   toThrow \
            , const char* const         text1 \
            , const char* const         text2 = 0 \
            , const char* const         text3 = 0 \
            , const char* const         text4 = 0 \
            , MemoryManager*            memoryManager = 0) : \
        XMLException(srcFile, srcLine, memoryManager) \
    { \
        loadExceptText(toThrow, text1, text2, text3, text4); \
    } \
 \
    virtual ~theType() {} \
 \
    theType& operator=(const theType& toAssign) \
    { \
        XMLException::operator=(toAssign); \
        return *this; \
    } \
 \
    virtual XMLException* duplicate() const \
    { \
        return new (fMemoryManager) theType(*this); \
    } \
 \
    virtual const XMLCh* getType() const \
    { \
        return XMLUni::fg##theType##_Name; \
    } \
 \
private : \
    theType(); \
};
 
 
 
// ---------------------------------------------------------------------------
//  This macros is used to actually throw an exception. It is used in order
//  to make sure that source code line/col info is stored correctly, and to
//  give flexibility for other stuff in the future.
// ---------------------------------------------------------------------------
 
#define ThrowXML(type,code) throw type(__FILE__, __LINE__, code)
 
#define ThrowXML1(type,code,p1) throw type(__FILE__, __LINE__, code, p1)
 
#define ThrowXML2(type,code,p1,p2) throw type(__FILE__, __LINE__, code, p1, p2)
 
#define ThrowXML3(type,code,p1,p2,p3) throw type(__FILE__, __LINE__, code, p1, p2, p3)
 
#define ThrowXML4(type,code,p1,p2,p3,p4) throw type(__FILE__, __LINE__, code, p1, p2, p3, p4)
 
#define ThrowXMLwithMemMgr(type,code,memMgr) throw type(__FILE__, __LINE__, code, memMgr)
 
#define ThrowXMLwithMemMgr1(type,code,p1,memMgr) throw type(__FILE__, __LINE__, code, p1, 0, 0, 0, memMgr)
 
#define ThrowXMLwithMemMgr2(type,code,p1,p2,memMgr) throw type(__FILE__, __LINE__, code, p1, p2, 0, 0, memMgr)
 
#define ThrowXMLwithMemMgr3(type,code,p1,p2,p3,memMgr) throw type(__FILE__, __LINE__, code, p1, p2, p3, 0, memMgr)
 
#define ThrowXMLwithMemMgr4(type,code,p1,p2,p3,p4,memMgr) throw type(__FILE__, __LINE__, code, p1, p2, p3, p4, memMgr)
 
XERCES_CPP_NAMESPACE_END
 
#endif