Hash2KeysSetOf.hpp
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* 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,
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* See the License for the specific language governing permissions and
* limitations under the License.
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/*
* $Id: Hash2KeysSetOf.hpp 883368 2009-11-23 15:28:19Z amassari $
*/
#if !defined(XERCESC_INCLUDE_GUARD_HASH2KEYSSETOF_HPP)
#define XERCESC_INCLUDE_GUARD_HASH2KEYSSETOF_HPP
#include <xercesc/util/Hashers.hpp>
#include <xercesc/util/IllegalArgumentException.hpp>
#include <xercesc/util/NoSuchElementException.hpp>
#include <xercesc/util/RuntimeException.hpp>
#include <xercesc/util/PlatformUtils.hpp>
XERCES_CPP_NAMESPACE_BEGIN
// This hash table is similar to Hash2KeysSetOf with an additional integer as key2
// Forward declare the enumerator so it can be our friend.
//
template <class THasher>
class Hash2KeysSetOfEnumerator;
//
// This should really be a nested class, but some of the compilers we
// have to support cannot deal with that!
//
struct Hash2KeysSetBucketElem
{
Hash2KeysSetBucketElem* fNext;
const void* fKey1;
int fKey2;
};
template <class THasher>
class Hash2KeysSetOf : public XMemory
{
public:
// -----------------------------------------------------------------------
// Constructors and Destructor
// -----------------------------------------------------------------------
Hash2KeysSetOf(
const XMLSize_t modulus,
MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);
Hash2KeysSetOf(
const XMLSize_t modulus,
const THasher& hasher,
MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);
~Hash2KeysSetOf();
// -----------------------------------------------------------------------
// Element management
// -----------------------------------------------------------------------
bool isEmpty() const;
bool containsKey(const void* const key1, const int key2) const;
void removeKey(const void* const key1, const int key2);
void removeKey(const void* const key1);
void removeAll();
// -----------------------------------------------------------------------
// Getters
// -----------------------------------------------------------------------
MemoryManager* getMemoryManager() const;
XMLSize_t getHashModulus() const;
// -----------------------------------------------------------------------
// Putters
// -----------------------------------------------------------------------
void put(const void* key1, int key2);
bool putIfNotPresent(const void* key1, int key2);
private :
// -----------------------------------------------------------------------
// Declare our friends
// -----------------------------------------------------------------------
friend class Hash2KeysSetOfEnumerator<THasher>;
private:
// -----------------------------------------------------------------------
// Unimplemented constructors and operators
// -----------------------------------------------------------------------
Hash2KeysSetOf(const Hash2KeysSetOf<THasher>&);
Hash2KeysSetOf<THasher>& operator=(const Hash2KeysSetOf<THasher>&);
// -----------------------------------------------------------------------
// Private methods
// -----------------------------------------------------------------------
Hash2KeysSetBucketElem* findBucketElem(const void* const key1, const int key2, XMLSize_t& hashVal);
const Hash2KeysSetBucketElem* findBucketElem(const void* const key1, const int key2, XMLSize_t& hashVal) const;
void initialize(const XMLSize_t modulus);
void rehash();
// -----------------------------------------------------------------------
// Data members
//
// fBucketList
// This is the array that contains the heads of all of the list
// buckets, one for each possible hash value.
//
// fHashModulus
// The modulus used for this hash table, to hash the keys. This is
// also the number of elements in the bucket list.
//
// fCount
// The number of elements currently in the map
//
// fHash
// The hasher for the key1 data type.
// -----------------------------------------------------------------------
MemoryManager* fMemoryManager;
Hash2KeysSetBucketElem** fBucketList;
XMLSize_t fHashModulus;
XMLSize_t fCount;
Hash2KeysSetBucketElem* fAvailable;
THasher fHasher;
};
//
// An enumerator for a value array. It derives from the basic enumerator
// class, so that value vectors can be generically enumerated.
//
template <class THasher>
class Hash2KeysSetOfEnumerator : public XMemory
{
public :
// -----------------------------------------------------------------------
// Constructors and Destructor
// -----------------------------------------------------------------------
Hash2KeysSetOfEnumerator(Hash2KeysSetOf<THasher>* const toEnum
, const bool adopt = false
, MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);
virtual ~Hash2KeysSetOfEnumerator();
// -----------------------------------------------------------------------
// Enum interface
// -----------------------------------------------------------------------
bool hasMoreElements() const;
void Reset();
// -----------------------------------------------------------------------
// New interface
// -----------------------------------------------------------------------
void nextElementKey(const void*&, int&);
void setPrimaryKey(const void* key);
private :
// -----------------------------------------------------------------------
// Unimplemented constructors and operators
// -----------------------------------------------------------------------
Hash2KeysSetOfEnumerator(const Hash2KeysSetOfEnumerator<THasher>&);
Hash2KeysSetOfEnumerator<THasher>& operator=(const Hash2KeysSetOfEnumerator<THasher>&);
// -----------------------------------------------------------------------
// Private methods
// -----------------------------------------------------------------------
void findNext();
// -----------------------------------------------------------------------
// Data Members
//
// fAdopted
// Indicates whether we have adopted the passed vector. If so then
// we delete the vector when we are destroyed.
//
// fCurElem
// This is the current bucket bucket element that we are on.
//
// fCurHash
// The is the current hash buck that we are working on. Once we hit
// the end of the bucket that fCurElem is in, then we have to start
// working this one up to the next non-empty bucket.
//
// fToEnum
// The value array being enumerated.
//
// fLockPrimaryKey
// Indicates that we are requested to iterate over the secondary keys
// associated with the given primary key
//
// -----------------------------------------------------------------------
bool fAdopted;
Hash2KeysSetBucketElem* fCurElem;
XMLSize_t fCurHash;
Hash2KeysSetOf<THasher>* fToEnum;
MemoryManager* const fMemoryManager;
const void* fLockPrimaryKey;
};
XERCES_CPP_NAMESPACE_END
#if !defined(XERCES_TMPLSINC)
#include <xercesc/util/Hash2KeysSetOf.c>
#endif
#endif
XMemory
This class makes it possible to override the C++ memory management by adding new/delete operators to ...
Definition: XMemory.hpp:40
Hash2KeysSetBucketElem
Definition: Hash2KeysSetOf.hpp:45
XMLPlatformUtils::fgMemoryManager
static MemoryManager * fgMemoryManager
The configurable memory manager.
Definition: PlatformUtils.hpp:121
Hash2KeysSetBucketElem::fKey1
const void * fKey1
Definition: Hash2KeysSetOf.hpp:48
Hash2KeysSetBucketElem::fKey2
int fKey2
Definition: Hash2KeysSetOf.hpp:49
IllegalArgumentException.hpp
Hash2KeysSetBucketElem::fNext
Hash2KeysSetBucketElem * fNext
Definition: Hash2KeysSetOf.hpp:47
PlatformUtils.hpp
MemoryManager
Configurable memory manager.
Definition: MemoryManager.hpp:39
Hash2KeysSetOf
Definition: Hash2KeysSetOf.hpp:54
XERCES_CPP_NAMESPACE_BEGIN
#define XERCES_CPP_NAMESPACE_BEGIN
Definition: XercesDefs.hpp:112
NoSuchElementException.hpp
XMLSize_t
size_t XMLSize_t
Definition: Xerces_autoconf_config.hpp:110
XERCES_CPP_NAMESPACE_END
#define XERCES_CPP_NAMESPACE_END
Definition: XercesDefs.hpp:113
RuntimeException.hpp
Hash2KeysSetOfEnumerator
Definition: Hash2KeysSetOf.hpp:39