An XML parser and editor with shades of a Design Pattern

/*
 * Copyright 2003,2004 The Apache Software Foundation.
 * 
 * Licensed 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: XSTypeDefinition.hpp 191054 2005-06-17 02:56:35Z jberry $
 */

#if !defined(XSTYPEDEFINITION_HPP)
#define XSTYPEDEFINITION_HPP

#include <xercesc/framework/psvi/XSObject.hpp>

XERCES_CPP_NAMESPACE_BEGIN

// forward declarations
class XSNamespaceItem;

/**
 * This class represents a complexType or simpleType definition.
 * This is *always* owned by the validator /parser object from which
 * it is obtained.  
 *
 */

class XMLPARSER_EXPORT XSTypeDefinition : public XSObject
{
public:

    enum TYPE_CATEGORY {
        /**
        * This constant value signifies a complex type.
        */
        COMPLEX_TYPE              = 15,
	    /**
	     * This constant value signifies a simple type.
	     */
	    SIMPLE_TYPE               = 16
    };

    //  Constructors and Destructor
    // -----------------------------------------------------------------------
    /** @name Constructors */
    //@{

    /**
      * The default constructor 
      *
      * @param  typeCategory
      * @param  xsBaseType
      * @param  xsModel
      * @param  manager     The configurable memory manager
      */
    XSTypeDefinition
    (
        TYPE_CATEGORY             typeCategory
        , XSTypeDefinition* const xsBaseType
        , XSModel* const          xsModel
        , MemoryManager* const    manager = XMLPlatformUtils::fgMemoryManager
    );

    //@};

    /** @name Destructor */
    //@{
    virtual ~XSTypeDefinition();
    //@}

    //---------------------
    /** @name overloaded XSObject methods */
    //@{

    /**
     * The name of type <code>NCName</code> of this declaration as defined in 
     * XML Namespaces.
     */
    virtual const XMLCh* getName() = 0;

    /**
     *  The [target namespace] of this object, or <code>null</code> if it is 
     * unspecified. 
     */
    virtual const XMLCh* getNamespace() = 0;

    /**
     * A namespace schema information item corresponding to the target 
     * namespace of the component, if it's globally declared; or null 
     * otherwise.
     */
    virtual XSNamespaceItem *getNamespaceItem() = 0;

    //@}

    //---------------------
    /** @name XSTypeDefinition methods */

    //@{

    /**
     * Return whether this type definition is a simple type or complex type.
     */
    TYPE_CATEGORY getTypeCategory() const;

    /**
     * {base type definition}: either a simple type definition or a complex 
     * type definition. 
     */
    virtual XSTypeDefinition *getBaseType() = 0;

    /**
     * {final}. For complex type definition it is a subset of {extension, 
     * restriction}. For simple type definition it is a subset of 
     * {extension, list, restriction, union}. 
     * @param toTest       Extension, restriction, list, union constants 
     *   (defined in <code>XSObject</code>). 
     * @return True if toTest is in the final set, otherwise false.
     */
    bool isFinal(short toTest);

    /**
     * For complex types the returned value is a bit combination of the subset 
     * of {<code>DERIVATION_EXTENSION, DERIVATION_RESTRICTION</code>} 
     * corresponding to <code>final</code> set of this type or 
     * <code>DERIVATION_NONE</code>. For simple types the returned value is 
     * a bit combination of the subset of { 
     * <code>DERIVATION_RESTRICTION, DERIVATION_EXTENSION, DERIVATION_UNION, DERIVATION_LIST</code>
     * } corresponding to <code>final</code> set of this type or 
     * <code>DERIVATION_NONE</code>. 
     */
    short getFinal() const;

    /**
     *  A boolean that specifies if the type definition is 
     * anonymous. Convenience attribute. 
     */
    virtual bool getAnonymous() const = 0;

    /**
     * Convenience method: check if this type is derived from the given 
     * <code>ancestorType</code>. 
     * @param ancestorType  An ancestor type definition. 
     * @return  Return true if this type is derived from 
     *   <code>ancestorType</code>.
     */
    virtual bool derivedFromType(const XSTypeDefinition* const ancestorType) = 0;

    /**
     * Convenience method: check if this type is derived from the given 
     * ancestor type. 
     * @param typeNamespace  An ancestor type namespace. 
     * @param name  An ancestor type name. 
     * @return  Return true if this type is derived from 
     *   the ancestor defined by <code>typeNamespace</code> and <code>name</code>.
     */
    bool derivedFrom(const XMLCh* typeNamespace, 
                               const XMLCh* name);

    //@}

    //----------------------------------
    /** methods needed by implementation */

    //@{

    //@}
private:

    // -----------------------------------------------------------------------
    //  Unimplemented constructors and operators
    // -----------------------------------------------------------------------
    XSTypeDefinition(const XSTypeDefinition&);
    XSTypeDefinition & operator=(const XSTypeDefinition &);

protected:

    // -----------------------------------------------------------------------
    //  data members
    // -----------------------------------------------------------------------
    // fTypeCategory
    //  whether this is a simpleType or complexType
    // fFinal
    //  the final properties which is set by the derived class.
    TYPE_CATEGORY     fTypeCategory;
    short             fFinal;
    XSTypeDefinition* fBaseType; // owned by XSModel
};

inline XSTypeDefinition::TYPE_CATEGORY XSTypeDefinition::getTypeCategory() const
{
    return fTypeCategory;
}

inline short XSTypeDefinition::getFinal() const
{
    return fFinal;
}


XERCES_CPP_NAMESPACE_END

#endif