XToken.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.
 */
#if !defined(XTOKEN_HEADER_GUARD_1357924680)
#define XTOKEN_HEADER_GUARD_1357924680
 
 
 
// Base header file.  Must be first.
#include <xalanc/XPath/XPathDefinitions.hpp>
 
 
 
// Base class...
#include <xalanc/XPath/XObject.hpp>
 
 
 
#include <xalanc/XalanDOM/XalanDOMString.hpp>
 
 
 
namespace XALAN_CPP_NAMESPACE {
 
 
 
class XALAN_XPATH_EXPORT XToken : public XObject
{
public:
 
    /**
     * Create an XToken.
     *
     * @param theMemoryManager The MemoryManager instance.
     */
    XToken(MemoryManager&   theMemoryManager);
 
    /**
     * Create an XToken for string in the token queue.
     *
     * @param theString The string data for the token.  The instance will keep a point to this string, so it must be persistent.
     * @param theNumber The numeric data for the token.  This must be consistent with the lexical value in theString.
     * @param theMemoryManager The MemoryManager instance.
     */
    XToken(
            const XalanDOMString&   theString,
            double                  theNumber,
            MemoryManager&          theMemoryManager);
 
    /**
     * Create an XToken for number in the token queue.
     *
     * @param theNumber The numeric data for the token.  This must be consistent with the lexical value in theString.
     * @param theString The string data for the token.  The instance will keep a point to this string, so it must be persistent.
     * @param theMemoryManager The MemoryManager instance.
     */
    XToken(
            double                  theNumber,
            const XalanDOMString&   theString,
            MemoryManager&          theMemoryManager);
 
    /**
     * Create an XToken from another one.
     *
     * In most cases, the following copy constructor,
     * which accepts an explicit MemoryManager instance,
     * is recommended.
     *
     * @param theSource The source XToken instance.
     */
    XToken(const XToken&    theSource);
 
    /**
     * Create an XToken from another one.
     *
     * @param theSource The source XToken instance.
     * @param theMemoryManager The MemoryManager instance.
     */
    XToken(
            const XToken&   theSource,
            MemoryManager&  theMemoryManager);
 
    virtual
    ~XToken();
 
    virtual const XalanDOMString&
    getTypeString() const;
 
    virtual double
    num(XPathExecutionContext&  executionContext) const;
 
    virtual bool
    boolean(XPathExecutionContext&  executionContext) const;
 
    virtual const XalanDOMString&
    str(XPathExecutionContext&  executionContext) const;
 
    virtual const XalanDOMString&
    str() const;
 
    virtual void
    str(
            XPathExecutionContext&  executionContext,
            FormatterListener&      formatterListener,
            MemberFunctionPtr       function) const;
 
    virtual void
    str(
            FormatterListener&      formatterListener,
            MemberFunctionPtr       function) const;
 
    virtual void
    str(
            XPathExecutionContext&  executionContext,
            XalanDOMString&         theBuffer) const;
 
    virtual void
    str(XalanDOMString&     theBuffer) const;
 
    virtual double
    stringLength(XPathExecutionContext&     executionContext) const;
 
    virtual void
    ProcessXObjectTypeCallback(XObjectTypeCallback&     theCallbackObject);
 
    virtual void
    ProcessXObjectTypeCallback(XObjectTypeCallback&     theCallbackObject) const;
 
    XToken&
    operator=(const XToken&     theRHS)
    {
        m_stringValue = theRHS.m_stringValue;
 
        m_numberValue = theRHS.m_numberValue;
 
        return *this;
    }
 
    bool
    boolean() const
    {
        assert(m_stringValue != 0);
 
        return m_isString == true ? XObject::boolean(*m_stringValue) : XObject::boolean(m_numberValue);
    }
 
    double
    num() const
    {
        assert(m_stringValue != 0);
 
        return m_numberValue;
    }
 
    double
    stringLength() const
    {
        assert(m_stringValue != 0);
 
        return static_cast<double>(m_stringValue->length());
    }
 
    /**
     * Set the instance as a string in the token queue.
     *
     * @param theString The string data for the token.  XToken will keep a point to this string, so it must be persistent.
     * @param theNumber The numeric data for the token.  This must be consistent with the lexical value in theString.
     */
    void
    set(
            const XalanDOMString&   theString,
            double                  theNumber);
 
    /**
     * Set the instance as a number in the token queue.
     *
     * @param theNumber The numeric data for the token.  This must be consistent with the lexical value in theString.
     * @param theString The string data for the token.  XToken will keep a point to this string, so it must be persistent.
     */
    void
    set(
            double                  theNumber,
            const XalanDOMString&   theString);
 
protected:
 
    virtual void 
    referenced();
 
    virtual void 
    dereferenced();
 
private:
 
    // Not defined...
    bool
    operator==(const XToken&) const;
 
    // Data members...
    const XalanDOMString*   m_stringValue;
 
    double                  m_numberValue;
 
    bool                    m_isString;
};
 
 
 
XALAN_USES_MEMORY_MANAGER(XToken)
 
 
 
}
 
 
 
#endif  // XTOKEN_HEADER_GUARD_1357924680