/*

 * 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: GrammarResolver.hpp 568078 2007-08-21 11:43:25Z amassari $

 */

#if !defined(GRAMMARRESOLVER_HPP)

#define GRAMMARRESOLVER_HPP

#include <xercesc/framework/XMLGrammarPool.hpp>

#include <xercesc/util/RefHashTableOf.hpp>

#include <xercesc/util/StringPool.hpp>

#include <xercesc/validators/common/Grammar.hpp>

XERCES_CPP_NAMESPACE_BEGIN

class DatatypeValidator;

class DatatypeValidatorFactory;

class XMLGrammarDescription;

/**

 * This class embodies the representation of a Grammar pool Resolver.

 * This class is called from the validator.

 *

 */

class VALIDATORS_EXPORT GrammarResolver : public XMemory

{

public:

    /** @name Constructor and Destructor */

    //@{

    /**

     *

     * Default Constructor

     */

    GrammarResolver(

                    XMLGrammarPool* const gramPool

                  , MemoryManager*  const manager = XMLPlatformUtils::fgMemoryManager

                    );

    /**

      * Destructor

      */

    ~GrammarResolver();

    //@}

    /** @name Getter methods */

    //@{

    /**

     * Retrieve the DatatypeValidator

     *

     * @param uriStr the namespace URI

     * @param typeName the type name

     * @return the DatatypeValidator associated with namespace & type name

     */

    DatatypeValidator* getDatatypeValidator(const XMLCh* const uriStr,

                                            const XMLCh* const typeName);

    /**

     * Retrieve the grammar that is associated with the specified namespace key

     *

     * @param  gramDesc   grammar description for the grammar

     * @return Grammar abstraction associated with the grammar description

     */

    Grammar* getGrammar( XMLGrammarDescription* const gramDesc ) ;

    /**

     * Retrieve the grammar that is associated with the specified namespace key

     *

     * @param  namespaceKey   Namespace key into Grammar pool

     * @return Grammar abstraction associated with the NameSpace key.

     */

    Grammar* getGrammar( const XMLCh* const namespaceKey ) ;

    /**

     * Get an enumeration of Grammar in the Grammar pool

     *

     * @return enumeration of Grammar in Grammar pool

     */

    RefHashTableOfEnumerator<Grammar> getGrammarEnumerator() const;

    /**

     * Get an enumeration of the referenced Grammars 

     *

     * @return enumeration of referenced Grammars

     */

    RefHashTableOfEnumerator<Grammar> getReferencedGrammarEnumerator() const;

    /**

     * Get an enumeration of the cached Grammars in the Grammar pool

     *

     * @return enumeration of the cached Grammars in Grammar pool

     */

    RefHashTableOfEnumerator<Grammar> getCachedGrammarEnumerator() const;

    /**

     * Get a string pool of schema grammar element/attribute names/prefixes

     * (used by TraverseSchema)

     *

     * @return a string pool of schema grammar element/attribute names/prefixes

     */

    XMLStringPool* getStringPool();

    /**

     * Is the specified Namespace key in Grammar pool?

     *

     * @param  nameSpaceKey    Namespace key

     * @return True if Namespace key association is in the Grammar pool.

     */

    bool containsNameSpace( const XMLCh* const nameSpaceKey );

    inline XMLGrammarPool* getGrammarPool() const;

    inline MemoryManager* getGrammarPoolMemoryManager() const;

    //@}

    /** @name Setter methods */

    //@{

    /**

      * Set the 'Grammar caching' flag

      */

    void cacheGrammarFromParse(const bool newState);

    /**

      * Set the 'Use cached grammar' flag

      */

    void useCachedGrammarInParse(const bool newState);

    //@}

    /** @name GrammarResolver methods */

    //@{

    /**

     * Add the Grammar with Namespace Key associated to the Grammar Pool.

     * The Grammar will be owned by the Grammar Pool.

     *

     * @param  grammarToAdopt  Grammar abstraction used by validator.

     */

    void putGrammar(Grammar* const               grammarToAdopt );

    /**

     * Returns the Grammar with Namespace Key associated from the Grammar Pool

     * The Key entry is removed from the table (grammar is not deleted if

     * adopted - now owned by caller).

     *

     * @param  nameSpaceKey    Key to associate with Grammar abstraction

     */

    Grammar* orphanGrammar(const XMLCh* const nameSpaceKey);

    /**

     * Cache the grammars in fGrammarBucket to fCachedGrammarRegistry.

     * If a grammar with the same key is already cached, an exception is

     * thrown and none of the grammars will be cached.

     */

    void cacheGrammars();

    /**

     * Reset internal Namespace/Grammar registry.

     */

    void reset();

    void resetCachedGrammar();

    /**

     * Returns an XSModel, either from the GrammarPool or by creating one

     */

    XSModel*    getXSModel();

    ValueVectorOf<SchemaGrammar*>* getGrammarsToAddToXSModel();

    //@}

private:

    // -----------------------------------------------------------------------

    //  Unimplemented constructors and operators

    // -----------------------------------------------------------------------

    GrammarResolver(const GrammarResolver&);

    GrammarResolver& operator=(const GrammarResolver&);

    // -----------------------------------------------------------------------

    //  Private data members

    //

    //  fStringPool            The string pool used by TraverseSchema to store

    //                         element/attribute names and prefixes.

    //                         Always owned by Grammar pool implementation

    //

    //  fGrammarBucket         The parsed Grammar Pool, if no caching option.

    //

    //  fGrammarFromPool       Referenced Grammar Set, not owned

    //

    //  fGrammarPool           The Grammar Set either plugged or created. 

    //

    //  fDataTypeReg           DatatypeValidatorFactory registery

    //

    //  fMemoryManager         Pluggable memory manager for dynamic memory

    //                         allocation/deallocation

    // -----------------------------------------------------------------------

    bool                            fCacheGrammar;

    bool                            fUseCachedGrammar;

    bool                            fGrammarPoolFromExternalApplication;

    XMLStringPool*                  fStringPool;

    RefHashTableOf<Grammar>*        fGrammarBucket;

    RefHashTableOf<Grammar>*        fGrammarFromPool;

    DatatypeValidatorFactory*       fDataTypeReg;

    MemoryManager*                  fMemoryManager;

    XMLGrammarPool*                 fGrammarPool;

    XSModel*                        fXSModel;

    XSModel*                        fGrammarPoolXSModel;

    ValueVectorOf<SchemaGrammar*>*  fGrammarsToAddToXSModel;

};

inline XMLStringPool* GrammarResolver::getStringPool() {

    return fStringPool;

}

inline void GrammarResolver::useCachedGrammarInParse(const bool aValue)

{

    fUseCachedGrammar = aValue;

}

inline XMLGrammarPool* GrammarResolver::getGrammarPool() const

{

    return fGrammarPool;

}

inline MemoryManager* GrammarResolver::getGrammarPoolMemoryManager() const

{

    return fGrammarPool->getMemoryManager();

}

inline ValueVectorOf<SchemaGrammar*>* GrammarResolver::getGrammarsToAddToXSModel()

{

    return fGrammarsToAddToXSModel;

}

XERCES_CPP_NAMESPACE_END

#endif