272 lines
8.4 KiB
C++
272 lines
8.4 KiB
C++
/*
|
|
* Copyright (c) 2001-2008
|
|
* DecisionSoft Limited. All rights reserved.
|
|
* Copyright (c) 2004-2008
|
|
* Oracle. All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* $Id: VariableStoreTemplate.hpp 475 2008-01-08 18:47:44Z jpcs $
|
|
*/
|
|
|
|
#ifndef _VARIABLESTORETEMPLATE_HPP
|
|
#define _VARIABLESTORETEMPLATE_HPP
|
|
|
|
#include <xqilla/framework/XQillaExport.hpp>
|
|
|
|
#include <vector>
|
|
#include <xercesc/util/StringPool.hpp>
|
|
|
|
#include <assert.h>
|
|
#include <xqilla/context/impl/VarHashEntryImpl.hpp>
|
|
#include <xqilla/context/VarHashEntry.hpp>
|
|
#include <xqilla/context/Scope.hpp>
|
|
#include <xqilla/utils/XStr.hpp>
|
|
|
|
template<class TYPE> class VarHashEntry;
|
|
class XPath2MemoryManager;
|
|
|
|
/** This is the wrapper class for the variable store, which implements the
|
|
lookup and scoping of simple variables. */
|
|
template<class TYPE>
|
|
class VariableStoreTemplate
|
|
{
|
|
public:
|
|
typedef Scope<TYPE> MyScope;
|
|
|
|
VariableStoreTemplate(XPath2MemoryManager *memMgr);
|
|
/** default destructor */
|
|
~VariableStoreTemplate();
|
|
|
|
void clear();
|
|
|
|
void addScope(typename MyScope::Type type);
|
|
void addScope(MyScope *scope);
|
|
/** Removes the top level scope from the store. To be called at the end of methods to
|
|
implement scoping. */
|
|
void removeScope();
|
|
/** Removes the top level scope from the store, and returns it. The scope must have
|
|
release called on it, otherwise it will leak memory. */
|
|
MyScope *popScope();
|
|
|
|
void setCurrentScope(MyScope *scope);
|
|
|
|
/** Declares and/or sets a variable in the global scope. */
|
|
void setGlobalVar(const XMLCh* namespaceURI, const XMLCh* name, const TYPE &value);
|
|
|
|
/** Deletes a variable from the global scope. */
|
|
void delGlobalVar(const XMLCh* namespaceURI, const XMLCh* name);
|
|
|
|
/** Gets a variable from the global scope */
|
|
VarHashEntry<TYPE>* getGlobalVar(const XMLCh* namespaceURI, const XMLCh* name) const;
|
|
|
|
/** Declare a var in the top level scope (A full set of
|
|
these namespaceURI/name pair methods should be made) */
|
|
void declareVar(const XMLCh* namespaceURI, const XMLCh* name, const TYPE &value);
|
|
|
|
/** Declares and/or sets a variable in the top level scope. */
|
|
void setVar(const XMLCh* namespaceURI, const XMLCh* name, const TYPE &value);
|
|
|
|
/** Looks up the value of a variable in the current scope, using ident as an
|
|
qname. Returns the VarHashEntry for the variable, or null if it doesn't
|
|
exist*/
|
|
VarHashEntry<TYPE>* getVar(const XMLCh* namespaceURI, const XMLCh* name) const;
|
|
|
|
/** Deletes a variable from the current scope. */
|
|
void delVar(const XMLCh* namespaceURI, const XMLCh* name);
|
|
|
|
const MyScope *getCurrentScope() const { return _current; }
|
|
MyScope *getCurrentScope() { return _current; }
|
|
const MyScope *getGlobalScope() const { return _global; }
|
|
const XMLCh *lookUpNamespace(unsigned int nsID) const { return _uriPool.getValueForId(nsID); }
|
|
|
|
private:
|
|
/** find routine which returns the scope in the hash table which contains the
|
|
identifiers, or the current/global one if it can't be found. */
|
|
MyScope* find(unsigned int nsID, const XMLCh* name) const;
|
|
|
|
XERCES_CPP_NAMESPACE_QUALIFIER XMLStringPool _uriPool;
|
|
XPath2MemoryManager* _memMgr;
|
|
MyScope *_global, *_current;
|
|
};
|
|
|
|
template<class TYPE>
|
|
VariableStoreTemplate<TYPE>::VariableStoreTemplate(XPath2MemoryManager* memMgr)
|
|
: _uriPool(17, memMgr)
|
|
{
|
|
_memMgr=memMgr;
|
|
_global=new (_memMgr) MyScope(_memMgr, MyScope::GLOBAL_SCOPE);
|
|
_current=NULL;
|
|
}
|
|
|
|
template<class TYPE>
|
|
VariableStoreTemplate<TYPE>::~VariableStoreTemplate()
|
|
{
|
|
clear();
|
|
delete _global;
|
|
}
|
|
|
|
template<class TYPE>
|
|
void VariableStoreTemplate<TYPE>::clear()
|
|
{
|
|
// Remove all the scopes
|
|
while(_current) {
|
|
removeScope();
|
|
}
|
|
// Clear the global scope
|
|
_global->clear();
|
|
}
|
|
|
|
template<class TYPE>
|
|
void VariableStoreTemplate<TYPE>::addScope(typename MyScope::Type type)
|
|
{
|
|
addScope(new (_memMgr) MyScope(_memMgr, type));
|
|
}
|
|
|
|
template<class TYPE>
|
|
void VariableStoreTemplate<TYPE>::addScope(MyScope *scope)
|
|
{
|
|
scope->setNext(_current);
|
|
setCurrentScope(scope);
|
|
}
|
|
|
|
template<class TYPE>
|
|
void VariableStoreTemplate<TYPE>::setCurrentScope(MyScope *scope)
|
|
{
|
|
_current = scope;
|
|
}
|
|
|
|
template<class TYPE>
|
|
void VariableStoreTemplate<TYPE>::removeScope()
|
|
{
|
|
delete popScope();
|
|
}
|
|
|
|
template<class TYPE>
|
|
typename VariableStoreTemplate<TYPE>::MyScope *VariableStoreTemplate<TYPE>::popScope()
|
|
{
|
|
assert( _current!=NULL );
|
|
|
|
MyScope *result = _current;
|
|
_current = _current->getNext();
|
|
return result;
|
|
}
|
|
|
|
template<class TYPE>
|
|
void VariableStoreTemplate<TYPE>::setGlobalVar(const XMLCh* namespaceURI,
|
|
const XMLCh* name,
|
|
const TYPE &value)
|
|
{
|
|
if(!_uriPool.exists(namespaceURI))
|
|
namespaceURI=_memMgr->getPooledString(namespaceURI);
|
|
unsigned int nsID=_uriPool.addOrFind(namespaceURI);
|
|
VarHashEntry<TYPE>* result=_global->get(nsID, name);
|
|
if(result)
|
|
result->setValue(value);
|
|
else
|
|
_global->put(nsID, name, new (_memMgr) VarHashEntryImpl<TYPE>(value));
|
|
}
|
|
|
|
template<class TYPE>
|
|
void VariableStoreTemplate<TYPE>::setVar(const XMLCh* namespaceURI,
|
|
const XMLCh* name,
|
|
const TYPE &value)
|
|
{
|
|
if(!_uriPool.exists(namespaceURI))
|
|
namespaceURI=_memMgr->getPooledString(namespaceURI);
|
|
unsigned int nsID=_uriPool.addOrFind(namespaceURI);
|
|
MyScope* scope=find(nsID, name);
|
|
VarHashEntry<TYPE>* result = scope->get(nsID, name);
|
|
|
|
if(result)
|
|
result->setValue(value);
|
|
else
|
|
scope->put(nsID, name, new (_memMgr) VarHashEntryImpl<TYPE>(value));
|
|
}
|
|
|
|
template<class TYPE>
|
|
void VariableStoreTemplate<TYPE>::declareVar(const XMLCh* namespaceURI,
|
|
const XMLCh* name,
|
|
const TYPE &value)
|
|
{
|
|
if(!_uriPool.exists(namespaceURI))
|
|
namespaceURI=_memMgr->getPooledString(namespaceURI);
|
|
unsigned int nsID=_uriPool.addOrFind(namespaceURI);
|
|
_current->put(nsID, name, new (_memMgr) VarHashEntryImpl<TYPE>(value));
|
|
}
|
|
|
|
/** Returns a null VarHashEntry if unsuccessful */
|
|
template<class TYPE>
|
|
VarHashEntry<TYPE>* VariableStoreTemplate<TYPE>::getVar(const XMLCh* namespaceURI,
|
|
const XMLCh* name) const
|
|
{
|
|
unsigned int nsID=_uriPool.getId(namespaceURI);
|
|
// if the namespace is not in the map, the variable is not there neither
|
|
if(nsID!=0)
|
|
return find(nsID, name)->get(nsID, name);
|
|
return NULL;
|
|
}
|
|
|
|
template<class TYPE>
|
|
VarHashEntry<TYPE>* VariableStoreTemplate<TYPE>::getGlobalVar(const XMLCh* namespaceURI,
|
|
const XMLCh* name) const
|
|
{
|
|
unsigned int nsID=_uriPool.getId(namespaceURI);
|
|
// if the namespace is not in the map, the variable is not there neither
|
|
if(nsID!=0)
|
|
return _global->get(nsID, name);
|
|
return 0;
|
|
}
|
|
|
|
template<class TYPE>
|
|
void VariableStoreTemplate<TYPE>::delVar( const XMLCh* namespaceURI, const XMLCh* name)
|
|
{
|
|
unsigned int nsID=_uriPool.getId(namespaceURI);
|
|
// if the namespace is not in the map, the variable is not there neither
|
|
if(nsID!=0)
|
|
find(nsID, name)->remove(nsID, name);
|
|
}
|
|
|
|
template<class TYPE>
|
|
void VariableStoreTemplate<TYPE>::delGlobalVar( const XMLCh* namespaceURI, const XMLCh* name)
|
|
{
|
|
unsigned int nsID=_uriPool.getId(namespaceURI);
|
|
// if the namespace is not in the map, the variable is not there neither
|
|
if(nsID!=0)
|
|
_global->remove(nsID, name);
|
|
}
|
|
|
|
template<class TYPE>
|
|
typename VariableStoreTemplate<TYPE>::MyScope* VariableStoreTemplate<TYPE>::find(unsigned int nsID, const XMLCh* name) const
|
|
{
|
|
// Check the local scopes
|
|
MyScope* index=_current;
|
|
while(index) {
|
|
if(index->get(nsID, name)!=NULL)
|
|
return index;
|
|
if(index->getType() == MyScope::LOCAL_SCOPE)
|
|
break;
|
|
index=index->getNext();
|
|
}
|
|
|
|
// Check the global scope
|
|
if(_global->get(nsID, name)!=NULL)
|
|
return _global;
|
|
|
|
// If we can't find it anywhere, then return the top level scope.
|
|
// This lets us set it in the correct place.
|
|
// For gets, we could return any scope.
|
|
return _current==NULL?_global:_current;
|
|
}
|
|
|
|
#endif
|