xmlattdef.hpp

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/*
 * Copyright 1999-2004 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.
 */

/*
 * $Log: XMLAttDef.hpp,v $
 * Revision 1.14  2004/09/08 13:55:58  peiyongz
 * Apache License Version 2.0
 *
 * Revision 1.13  2004/09/02 19:08:09  cargilld
 * Fix API Doc warning message
 *
 * Revision 1.12  2003/12/17 00:18:33  cargilld
 * Update to memory management so that the static memory manager (one used to call Initialize) is only for static data.
 *
 * Revision 1.11  2003/11/24 05:19:15  neilg
 * update method documentation
 *
 * Revision 1.10  2003/10/10 16:23:29  peiyongz
 * Implementation of Serialization/Deserialization
 *
 * Revision 1.9  2003/05/16 21:36:55  knoaman
 * Memory manager implementation: Modify constructors to pass in the memory manager.
 *
 * Revision 1.8  2003/05/15 18:26:07  knoaman
 * Partial implementation of the configurable memory manager.
 *
 * Revision 1.7  2003/04/21 20:46:01  knoaman
 * Use XMLString::release to prepare for configurable memory manager.
 *
 * Revision 1.6  2003/03/07 18:08:10  tng
 * Return a reference instead of void for operator=
 *
 * Revision 1.5  2003/01/29 19:45:35  gareth
 * added api for DOMTypeInfo
 *
 * Revision 1.4  2002/12/10 02:15:55  knoaman
 * Schema Errata: E1-21.
 *
 * Revision 1.3  2002/11/04 15:00:21  tng
 * C++ Namespace Support.
 *
 * Revision 1.2  2002/02/20 18:17:01  tng
 * [Bug 5977] Warnings on generating apiDocs.
 *
 * Revision 1.1.1.1  2002/02/01 22:21:50  peiyongz
 * sane_include
 *
 * Revision 1.13  2001/11/15 16:36:36  knoaman
 * Re-organize constant values.
 *
 * Revision 1.12  2001/08/09 15:23:37  knoaman
 * add support for <anyAttribute> declaration.
 *
 * Revision 1.11  2001/06/21 14:25:26  knoaman
 * Fix for bug 1946
 *
 * Revision 1.10  2001/05/11 13:25:31  tng
 * Copyright update.
 *
 * Revision 1.9  2001/02/27 18:48:20  tng
 * Schema: Add SchemaAttDef, SchemaElementDecl, SchemaAttDefList.
 *
 * Revision 1.8  2000/12/14 18:49:56  tng
 * Fix API document generation warning: "Warning: end of member group without matching begin"
 *
 * Revision 1.7  2000/11/30 18:22:38  andyh
 * reuseValidator - fix bugs (spurious errors) that occured on reuse due to
 * pools already containing some items.  Fixed by Tinny Ng.
 *
 * Revision 1.6  2000/07/07 22:23:38  jpolast
 * remove useless getKey() functions.
 *
 * Revision 1.5  2000/02/24 20:00:22  abagchi
 * Swat for removing Log from API docs
 *
 * Revision 1.4  2000/02/16 23:03:48  roddey
 * More documentation updates
 *
 * Revision 1.3  2000/02/15 01:21:30  roddey
 * Some initial documentation improvements. More to come...
 *
 * Revision 1.2  2000/02/06 07:47:46  rahulj
 * Year 2K copyright swat.
 *
 * Revision 1.1.1.1  1999/11/09 01:08:27  twl
 * Initial checkin
 *
 * Revision 1.2  1999/11/08 20:44:34  rahul
 * Swat for adding in Product name and CVS comment log variable.
 *
 */

#if !defined(ATTDEF_HPP)
#define ATTDEF_HPP

#include <xercesc/util/PlatformUtils.hpp>
#include <xercesc/util/XMLString.hpp>
#include <xercesc/util/XMemory.hpp>
#include <xercesc/internal/XSerializable.hpp>

XERCES_CPP_NAMESPACE_BEGIN

class XMLAttr;

/** Represents the core information of an atribute definition
 *
 *  This class defines the basic characteristics of an attribute, no matter
 *  what type of validator is used. If a particular schema associates more
 *  information with an attribute it will create a derivative of this class.
 *  So this class provides an abstract way to get basic information on
 *  attributes from any type of validator.
 *
 *  This class supports keyed collection semantics on the fully qualified
 *  attribute name, by providing a getKey() method to extract the key string.
 *  getKey(), in this case, just calls the virtual method getFullName() to
 *  get the fully qualified name, as defined by the derived class.
 *
 *  Note that the 'value' of an attribute type definition is the default or
 *  of fixed value given to it in its definition. If the attribute is of the
 *  enumerated or notation type, it will have an 'enumeration value' as well
 *  which is a space separated list of its possible vlaues.
 */
class XMLPARSER_EXPORT XMLAttDef : public XSerializable, public XMemory
{
public:
    // -----------------------------------------------------------------------
    //  Class specific types
    //
    //  AttTypes
    //      The list of possible types that an attribute can have, according
    //      to the XML 1.0 spec and schema.
    //
    //  DefAttTypes
    //      The modifiers that an attribute decl can have, which indicates
    //      whether instances of that attributes are required, implied, etc..
    //
    //  CreateReasons
    //      This type is used to store how an attribute declaration got into
    //      the elementdecl's attribute pool.
    //
    // -----------------------------------------------------------------------
	enum AttTypes
    {
        CData               = 0
        , ID                = 1
        , IDRef             = 2
        , IDRefs            = 3
        , Entity            = 4
        , Entities          = 5
        , NmToken           = 6
        , NmTokens          = 7
        , Notation          = 8
        , Enumeration       = 9
        , Simple            = 10
        , Any_Any           = 11
        , Any_Other         = 12
        , Any_List          = 13

        , AttTypes_Count
        , AttTypes_Min      = 0
        , AttTypes_Max      = 13
        , AttTypes_Unknown  = -1
	};

    enum DefAttTypes
    {
        Default                  = 0
        , Fixed                  = 1
        , Required               = 2
        , Required_And_Fixed     = 3
        , Implied                = 4
        , ProcessContents_Skip   = 5
        , ProcessContents_Lax    = 6
        , ProcessContents_Strict = 7
        , Prohibited             = 8

        , DefAttTypes_Count
        , DefAttTypes_Min   = 0
        , DefAttTypes_Max   = 8
        , DefAttTypes_Unknown = -1
	};

    enum CreateReasons
    {
        NoReason
        , JustFaultIn
    };

    // -----------------------------------------------------------------------
    //  Public static data members
    // -----------------------------------------------------------------------
    static const unsigned int fgInvalidAttrId;


    // -----------------------------------------------------------------------
    //  Public, static methods
    // -----------------------------------------------------------------------

    /** @name Public, static methods */
    //@{

    /** Get a string representation of the passed attribute type enum
      *
      * This method allows you to get a textual representation of an attriubte
      * type, mostly for debug or display.
      *
      * @param attrType The attribute type value to get the string for.
      * @param manager The MemoryManager to use to allocate objects
      * @return A const pointer to the static string that holds the text
      *         description of the passed type.
      */
    static const XMLCh* getAttTypeString(const AttTypes attrType
        , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);

    /** Get a string representation of the passed def attribute type enum
      *
      * This method allows you to get a textual representation of an default
      * attributetype, mostly for debug or display.
      *
      * @param attrType The default attribute type value to get the string for.
      * @param manager The MemoryManager to use to allocate objects
      * @return A const pointer to the static string that holds the text
      *         description of the passed default type.
      */
    static const XMLCh* getDefAttTypeString(const DefAttTypes attrType
        , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);

    //@}


    // -----------------------------------------------------------------------
    //  Destructor
    // -----------------------------------------------------------------------

    /** @name Destructor */
    //@{

    /**
      *  Destructor
      */
    virtual ~XMLAttDef();
    //@}


    // -----------------------------------------------------------------------
    //  The virtual attribute def interface
    // -----------------------------------------------------------------------

    /** @name Virtual interface */
    //@{

    /** Get the full name of this attribute type
      *
      * The derived class should return a const pointer to the full name of
      * this attribute. This will vary depending on the type of validator in
      * use.
      *
      * @return A const pointer to the full name of this attribute type.
      */
    virtual const XMLCh* getFullName() const = 0;

    /**
     * The derived class should implement any cleaning up required between
     * each use of an instance of this class for validation
     */
    virtual void reset() = 0;

    //@}


    // -----------------------------------------------------------------------
    //  Getter methods
    // -----------------------------------------------------------------------

    /** @name Getter methods */
    //@{

    /** Get the default type of this attribute type
      *
      * This method returns the 'default type' of the attribute. Default
      * type in this case refers to the XML concept of a default type for
      * an attribute, i.e. #FIXED, #IMPLIED, etc...
      *
      * @return The default type enum for this attribute type.
      */
    DefAttTypes getDefaultType() const;

    /** Get the enumeration value (if any) of this attribute type
      *
      * If the attribute is of an enumeration or notatin type, then this
      * method will return a const reference to a string that contains the
      * space separated values that can the attribute can have.
      *
      * @return A const pointer to a string that contains the space separated
      *         legal values for this attribute.
      */
    const XMLCh* getEnumeration() const;

    /** Get the pool id of this attribute type
      *
      * This method will return the id of this attribute in the validator's
      * attribute pool. It was set by the validator when this attribute was
      * created.
      *
      * @return The pool id of this attribute type.
      */
    unsigned int getId() const;

    /** Query whether the attribute was explicitly provided.
      *
      * When the scanner scans a start tag, it will ask the element decl
      * object of the element type of that start tag to clear the 'provided'
      * flag on all its attributes. As the scanner sees explicitly provided
      * attributes, its turns on this flag to indicate that this attribute
      * has been provided. In this way, the scanner can catch duplicated
      * attributes and required attributes that aren't provided, and default
      * in fixed/default valued attributes that are not explicitly provided.
      *
      * @return Returns a boolean value that indicates whether this attribute
      *         was explicitly provided.
      * @deprecated
      */
    bool getProvided() const;

    /** Get the type of this attribute
      *
      * Gets the type of this attribute. This type is represented by an enum
      * that convers the types of attributes allowed by XML, e.g. CDATA, NMTOKEN,