/* * 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. */#if !defined(HASHBASE_HPP)#define HASHBASE_HPP#include <xercesc/util/XMemory.hpp>#include <xercesc/util/PlatformUtils.hpp>XERCES_CPP_NAMESPACE_BEGIN/** * The <code>HashBase</code> interface is the general outline of a hasher. * Hashers are used in <code>RefHashTableOf</code> hashtables to hash any * type of key.  An examples is the <code>HashXMLCh</code> class which is * designed to produce hash values for XMLCh* strings.  Any hasher inheriting * from <code>HashBase</code> may be specified when the RefHashTableOf hashtable is constructed. */class XMLUTIL_EXPORT HashBase : public XMemory{public:		/**      * Returns a hash value based on the key      *      * @param key the key to be hashed	  * @param mod the modulus the hasher should use      */	virtual unsigned int getHashVal(const void *const key, unsigned int mod        , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager) = 0;	/**      * Compares two keys and determines if they are semantically equal      *      * @param key1 the first key to be compared	  * @param key2 the second key to be compared	  *	  * @return true if they are equal      */	virtual bool equals(const void *const key1, const void *const key2) = 0;    virtual ~HashBase() {};    HashBase() {};private:	// -----------------------------------------------------------------------    //  Unimplemented constructors and operators    // -----------------------------------------------------------------------    HashBase(const HashBase&);    HashBase& operator=(const HashBase&);    };XERCES_CPP_NAMESPACE_END#endif