datatypevalidator.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: DatatypeValidator.hpp 568078 2007-08-21 11:43:25Z amassari $
 */

#if !defined(DATATYPEVALIDATOR_HPP)
#define DATATYPEVALIDATOR_HPP

#include <xercesc/util/PlatformUtils.hpp>
#include <xercesc/util/RefHashTableOf.hpp>
#include <xercesc/util/KVStringPair.hpp>
#include <xercesc/util/XMLUniDefs.hpp>
#include <xercesc/util/regx/RegularExpression.hpp>
#include <xercesc/validators/schema/SchemaSymbols.hpp>
#include <xercesc/internal/XSerializable.hpp>
#include <xercesc/framework/psvi/XSSimpleTypeDefinition.hpp>
#include <xercesc/framework/ValidationContext.hpp>

XERCES_CPP_NAMESPACE_BEGIN

class MemoryManager;

/**
  * DataTypeValidator defines the interface that data type validators must
  * obey. These validators can be supplied by the application writer and may
  * be useful as standalone code as well as plugins to the validator
  * architecture.
  *
  * Notice:
  * The datatype validator will own the facets hashtable passed to it during
  * construction, which means that the datatype validator will be responsible
  * for the deletion. The facets hashtable will be created during parsing and
  * passed to the appropriate datatype validator which in turn will delete it
  * upon its destruction.
  *
  */


class VALIDATORS_EXPORT DatatypeValidator : public XSerializable, public XMemory
{
public:
    // -----------------------------------------------------------------------
    // Constant data
    // -----------------------------------------------------------------------
	//facets
	enum {
        FACET_LENGTH         = 1,
        FACET_MINLENGTH      = 1<<1,
        FACET_MAXLENGTH      = 1<<2,
        FACET_PATTERN        = 1<<3,
        FACET_ENUMERATION    = 1<<4,
        FACET_MAXINCLUSIVE   = 1<<5,
        FACET_MAXEXCLUSIVE   = 1<<6,
        FACET_MININCLUSIVE   = 1<<7,
        FACET_MINEXCLUSIVE   = 1<<8,
        FACET_TOTALDIGITS    = 1<<9,
        FACET_FRACTIONDIGITS = 1<<10,
        FACET_ENCODING       = 1<<11,
        FACET_DURATION       = 1<<12,
        FACET_PERIOD         = 1<<13,
        FACET_WHITESPACE     = 1<<14
    };

    //2.4.2.6 whiteSpace - Datatypes
	enum {
        PRESERVE = 0,
        REPLACE  = 1,
        COLLAPSE = 2
    };

    enum ValidatorType {
        String,
        AnyURI,
        QName,
        Name,
        NCName,
        Boolean,
        Float,
        Double,
        Decimal,
        HexBinary,
        Base64Binary,
        Duration,
        DateTime,
        Date,
        Time,
        MonthDay,
        YearMonth,
        Year,
        Month,
        Day,
        ID,
        IDREF,
        ENTITY,
        NOTATION,
        List,
        Union,
        AnySimpleType,
        UnKnown
    };

    // -----------------------------------------------------------------------
    //  Public Destructor
    // -----------------------------------------------------------------------
	/** @name Destructor. */
    //@{

    virtual ~DatatypeValidator();

	//@}

    // -----------------------------------------------------------------------
    // Getter methods
    // -----------------------------------------------------------------------
    /** @name Getter Functions */
    //@{

    /**
      * Returns the final values of the simpleType
      */
    int getFinalSet() const;

    /**
      * Returns the datatype facet if any is set.
      */
	RefHashTableOf<KVStringPair>* getFacets() const;

    /**
      * Returns default value (collapse) for whiteSpace facet.
      * This function is overwritten in StringDatatypeValidator.
      */
    short getWSFacet () const;

    /**
      * Returns the base datatype validator if set.
      */
    DatatypeValidator* getBaseValidator() const;

    /**
      * Returns the 'class' type of datatype validator
      */
    ValidatorType getType() const;

    /**
      * Returns whether the type is atomic or not
      *
      * To be redefined in List/Union validators
      */
    virtual bool isAtomic() const;

    /**
      * Returns the datatype enumeration if any is set.
	  * Derived class shall provide their own copy.
      */
	virtual const RefArrayVectorOf<XMLCh>* getEnumString() const = 0;

    /**
     * returns true if this type is anonymous
     **/
    bool getAnonymous() const;

    /**
     * sets this type to be anonymous
     **/
    void setAnonymous();

    /**
     *  Fundamental Facet: ordered 
     */
    XSSimpleTypeDefinition::ORDERING getOrdered() const;

    /**
     * Fundamental Facet: cardinality. 
     */
    bool getFinite() const;

    /**
     * Fundamental Facet: bounded. 
     */
    bool getBounded() const;

    /**
     * Fundamental Facet: numeric. 
     */
    bool getNumeric() const;

    /**
     *    Canonical Representation
     *
     *    Derivative datatype may overwrite this method once
     *    it has its own canonical representation other than
     *    the default one.
     *
     * @param rawData:    data in raw string
     * @param memMgr:     memory manager
     * @param toValiate:  to validate the raw string or not
     *
     * @return: canonical representation of the data
     * 
     * Note:  
     *
     *    1. the return value is kept in memory allocated
     *       by the memory manager passed in or by dv's
     *       if no memory manager is provided.
     *
     *    2. client application is responsible for the 
     *       proper deallcation of the memory allocated
     *       for the returned value.
     *
     *    3. In the case where the rawData is not valid
     *       with regards to the fundamental datatype,
     *       a null string is returned.
     *
     */
    virtual const XMLCh* getCanonicalRepresentation
                        (
                          const XMLCh*         const rawData
                        ,       MemoryManager* const memMgr = 0
                        ,       bool                 toValidate = false
                        ) const;

    //@}

    // -----------------------------------------------------------------------
    // Validation methods
    // -----------------------------------------------------------------------
    /** @name Validation Function */
    //@{

     /**
	   * Checks that the "content" string is valid datatype.
       * If invalid, a Datatype validation exception is thrown.
	   *
	   * @param  content   A string containing the content to be validated
	   *
	   */
	virtual void validate
                 (
                  const XMLCh*             const content
                ,       ValidationContext* const context = 0
                ,       MemoryManager*     const manager = XMLPlatformUtils::fgMemoryManager
                  ) = 0;

    /**
      * Checks whether a given type can be used as a substitute
      *
      * @param  toCheck    A datatype validator of the type to be used as a
      *                    substitute
      *
      * To be redefined in UnionDatatypeValidator
      */

    virtual bool isSubstitutableBy(const DatatypeValidator* const toCheck);

	 //@}

    // -----------------------------------------------------------------------
    // Compare methods
    // -----------------------------------------------------------------------
    /** @name Compare Function */
    //@{

    /**
      * Compares content in the Domain value vs. lexical value.
      *
      * e.g. If type is a float then 1.0 may be equivalent to 1 even though
      * both are lexically different.
      *
      * @param  value1    string to compare
      *
      * @param  value2    string to compare
      *
      * We will provide a default behavior that should be redefined at the
      * children level, if necessary (i.e. boolean case).
      */
    virtual int compare(const XMLCh* const value1, const XMLCh* const value2
        ,       MemoryManager*     const manager = XMLPlatformUtils::fgMemoryManager
        );

    //@}

    /**
      * Returns an instance of the base datatype validator class
	  * Used by the DatatypeValidatorFactory.
      */
	virtual DatatypeValidator* newInstance
    (
        RefHashTableOf<KVStringPair>* const facets
        , RefArrayVectorOf<XMLCh>* const enums
        , const int finalSet
        , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager
    ) = 0;

    /**
     * Returns the uri,name of the type this validator is for
     */
    const XMLCh* getTypeName() const;

    /**
     * sets the uri,name that this  validator is for - typeName is uri,name string.
     * due to the internals of xerces this will set the uri to be the schema uri if
     * there is no comma in typeName
     */
    void setTypeName(const XMLCh* const typeName);

    /**
     * sets the uri,name that this  validator is for
     */
    void setTypeName(const XMLCh* const name, const XMLCh* const uri);

    /**
     * Returns the uri of the type this validator is for
     */
    const XMLCh* getTypeUri() const;

    /**
     * Returns the name of the type this validator is for
     */
    const XMLCh* getTypeLocalName() const;

    /**
     * Returns the plugged-in memory manager
     */
    MemoryManager* getMemoryManager() const;

    /***
     * Support for Serialization/De-serialization
     ***/
    DECL_XSERIALIZABLE(DatatypeValidator)

    /***
      *
      *  Serialzie DatatypeValidator derivative 
      *
      *  Param
      *     serEng: serialize engine
      *     dv:     DatatypeValidator derivative
      *
      *  Return:
      *
      ***/
	static void storeDV(XSerializeEngine&        serEng
                      , DatatypeValidator* const dv);

    /***
      *
      *  Create a DatatypeValidator derivative from the binary
      *  stream.
      *
      *  Param
      *     serEng: serialize engine
      *
      *  Return:
      *     DatatypeValidator derivative 
      *
      ***/
	static DatatypeValidator* loadDV(XSerializeEngine& serEng);

protected:
    // -----------------------------------------------------------------------