## Xalan-C++ API Documentation

### The Xalan C++ XSLT Processor Version 1.9

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# XNull.hpp

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    00001 /*
    00002  * Copyright 1999-2004 The Apache Software Foundation.
    00003  *
    00004  * Licensed under the Apache License, Version 2.0 (the "License");
    00005  * you may not use this file except in compliance with the License.
    00006  * You may obtain a copy of the License at
    00007  *
    00008  *     http://www.apache.org/licenses/LICENSE-2.0
    00009  *
    00010  * Unless required by applicable law or agreed to in writing, software
    00011  * distributed under the License is distributed on an "AS IS" BASIS,
    00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    00013  * See the License for the specific language governing permissions and
    00014  * limitations under the License.
    00015  */
    00016 #if !defined(XNULL_HEADER_GUARD_1357924680)
    00017 #define XNULL_HEADER_GUARD_1357924680
    00018
    00019
    00020
    00021 // Base header file.  Must be first.
    00022 #include <xalanc/XPath/XPathDefinitions.hpp>
    00023
    00024
    00025
    00026 // Base class header file.
    00027 #include <xalanc/XPath/XObject.hpp>
    00028
    00029
    00030
    00031 XALAN_CPP_NAMESPACE_BEGIN
    00032
    00033
    00034
    00035 class XALAN_XPATH_EXPORT XNull : public XObject
    00036 {
    00037 public:
    00038
    00039     typedef XObject     ParentType;
    00040
    00044     static void
    00045     initialize();
    00046
    00050     static void
    00051     terminate();
    00052
    00057     explicit
    00058     XNull();
    00059
    00066     XNull(const XNull&  source);
    00067
    00068     virtual
    00069     ~XNull();
    00070
    00071     // These methods are inherited from XObject ...
    00072
    00073     virtual const XalanDOMString&
    00074     getTypeString() const;
    00075
    00076     virtual double
    00077     num() const;
    00078
    00079     virtual bool
    00080     boolean() const;
    00081
    00082     virtual const XalanDOMString&
    00083     str() const;
    00084
    00085     virtual void
    00086     str(
    00087             FormatterListener&  formatterListener,
    00088             MemberFunctionPtr   function) const;
    00089
    00090 #if !defined(XALAN_NO_USING_DECLARATION)
    00091     using ParentType::str;
    00092 #endif
    00093
    00094     virtual double
    00095     stringLength() const;
    00096
    00097     virtual void
    00098     ProcessXObjectTypeCallback(XObjectTypeCallback&     theCallbackObject);
    00099
    00100     virtual void
    00101     ProcessXObjectTypeCallback(XObjectTypeCallback&     theCallbackObject) const;
    00102
    00103 private:
    00104
    00105     static XalanDOMString   s_nullString;
    00106
    00107     // not implemented
    00108     XNull& operator=(const XNull &);
    00109 };
    00110
    00111
    00112
    00113 XALAN_CPP_NAMESPACE_END
    00114
    00115
    00116
    00117 #endif  // XNULL_HEADER_GUARD_1357924680

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Xalan-C++ XSLT Processor Version 1.9 Copyright © 1999-2004 The Apache Software Foundation. All Rights Reserved.