264 lines
8 KiB
C++
264 lines
8 KiB
C++
/*
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* Copyright (c) 2001-2006
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* DecisionSoft Limited. All rights reserved.
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* Copyright (c) 2004-2006
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* Progress Software Corporation. All rights reserved.
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* Copyright (c) 2004-2006
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* Oracle. All rights reserved.
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*
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* See the file LICENSE for redistribution information.
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*
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* $Id: VariableStoreTemplate.hpp,v 1.8 2006/11/01 16:37:12 jpcs Exp $
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*/
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#ifndef _VARIABLESTORETEMPLATE_HPP
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#define _VARIABLESTORETEMPLATE_HPP
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#include <xqilla/framework/XQillaExport.hpp>
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#include <vector>
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#include <xercesc/util/StringPool.hpp>
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#include <assert.h>
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#include <xqilla/context/impl/VarHashEntryImpl.hpp>
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#include <xqilla/context/VarHashEntry.hpp>
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#include <xqilla/context/Scope.hpp>
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#include <xqilla/utils/XStr.hpp>
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template<class TYPE> class VarHashEntry;
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class XPath2MemoryManager;
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/** This is the wrapper class for the variable store, which implements the
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lookup and scoping of simple variables. */
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template<class TYPE>
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class VariableStoreTemplate
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{
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public:
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typedef Scope<TYPE> MyScope;
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VariableStoreTemplate(XPath2MemoryManager *memMgr);
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/** default destructor */
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~VariableStoreTemplate();
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void clear();
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void addScope(typename MyScope::Type type);
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void addScope(MyScope *scope);
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/** Removes the top level scope from the store. To be called at the end of methods to
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implement scoping. */
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void removeScope();
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/** Removes the top level scope from the store, and returns it. The scope must have
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release called on it, otherwise it will leak memory. */
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MyScope *popScope();
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void setCurrentScope(MyScope *scope);
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/** Declares and/or sets a variable in the global scope. */
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void setGlobalVar(const XMLCh* namespaceURI, const XMLCh* name, const TYPE &value);
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/** Deletes a variable from the global scope. */
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void delGlobalVar(const XMLCh* namespaceURI, const XMLCh* name);
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/** Gets a variable from the global scope */
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VarHashEntry<TYPE>* getGlobalVar(const XMLCh* namespaceURI, const XMLCh* name) const;
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/** Declare a var in the top level scope (A full set of
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these namespaceURI/name pair methods should be made) */
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void declareVar(const XMLCh* namespaceURI, const XMLCh* name, const TYPE &value);
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/** Declares and/or sets a variable in the top level scope. */
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void setVar(const XMLCh* namespaceURI, const XMLCh* name, const TYPE &value);
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/** Looks up the value of a variable in the current scope, using ident as an
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qname. Returns the VarHashEntry for the variable, or null if it doesn't
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exist*/
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VarHashEntry<TYPE>* getVar(const XMLCh* namespaceURI, const XMLCh* name) const;
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/** Deletes a variable from the current scope. */
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void delVar(const XMLCh* namespaceURI, const XMLCh* name);
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const MyScope *getCurrentScope() const { return _current; }
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MyScope *getCurrentScope() { return _current; }
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const MyScope *getGlobalScope() const { return _global; }
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const XMLCh *lookUpNamespace(unsigned int nsID) const { return _uriPool.getValueForId(nsID); }
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private:
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/** find routine which returns the scope in the hash table which contains the
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identifiers, or the current/global one if it can't be found. */
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MyScope* find(unsigned int nsID, const XMLCh* name) const;
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XERCES_CPP_NAMESPACE_QUALIFIER XMLStringPool _uriPool;
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XPath2MemoryManager* _memMgr;
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MyScope *_global, *_current;
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};
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template<class TYPE>
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VariableStoreTemplate<TYPE>::VariableStoreTemplate(XPath2MemoryManager* memMgr)
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: _uriPool(17, memMgr)
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{
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_memMgr=memMgr;
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_global=new (_memMgr) MyScope(_memMgr, MyScope::GLOBAL_SCOPE);
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_current=NULL;
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}
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template<class TYPE>
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VariableStoreTemplate<TYPE>::~VariableStoreTemplate()
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{
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clear();
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delete _global;
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}
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template<class TYPE>
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void VariableStoreTemplate<TYPE>::clear()
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{
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// Remove all the scopes
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while(_current) {
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removeScope();
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}
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// Clear the global scope
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_global->clear();
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}
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template<class TYPE>
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void VariableStoreTemplate<TYPE>::addScope(typename MyScope::Type type)
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{
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addScope(new (_memMgr) MyScope(_memMgr, type));
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}
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template<class TYPE>
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void VariableStoreTemplate<TYPE>::addScope(MyScope *scope)
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{
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scope->setNext(_current);
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setCurrentScope(scope);
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}
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template<class TYPE>
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void VariableStoreTemplate<TYPE>::setCurrentScope(MyScope *scope)
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{
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_current = scope;
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}
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template<class TYPE>
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void VariableStoreTemplate<TYPE>::removeScope()
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{
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delete popScope();
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}
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template<class TYPE>
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typename VariableStoreTemplate<TYPE>::MyScope *VariableStoreTemplate<TYPE>::popScope()
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{
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assert( _current!=NULL );
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MyScope *result = _current;
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_current = _current->getNext();
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return result;
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}
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template<class TYPE>
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void VariableStoreTemplate<TYPE>::setGlobalVar(const XMLCh* namespaceURI,
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const XMLCh* name,
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const TYPE &value)
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{
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if(!_uriPool.exists(namespaceURI))
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namespaceURI=_memMgr->getPooledString(namespaceURI);
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unsigned int nsID=_uriPool.addOrFind(namespaceURI);
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VarHashEntry<TYPE>* result=_global->get(nsID, name);
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if(result)
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result->setValue(value);
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else
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_global->put(nsID, name, new (_memMgr) VarHashEntryImpl<TYPE>(value));
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}
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template<class TYPE>
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void VariableStoreTemplate<TYPE>::setVar(const XMLCh* namespaceURI,
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const XMLCh* name,
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const TYPE &value)
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{
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if(!_uriPool.exists(namespaceURI))
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namespaceURI=_memMgr->getPooledString(namespaceURI);
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unsigned int nsID=_uriPool.addOrFind(namespaceURI);
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MyScope* scope=find(nsID, name);
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VarHashEntry<TYPE>* result = scope->get(nsID, name);
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if(result)
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result->setValue(value);
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else
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scope->put(nsID, name, new (_memMgr) VarHashEntryImpl<TYPE>(value));
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}
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template<class TYPE>
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void VariableStoreTemplate<TYPE>::declareVar(const XMLCh* namespaceURI,
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const XMLCh* name,
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const TYPE &value)
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{
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if(!_uriPool.exists(namespaceURI))
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namespaceURI=_memMgr->getPooledString(namespaceURI);
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unsigned int nsID=_uriPool.addOrFind(namespaceURI);
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_current->put(nsID, name, new (_memMgr) VarHashEntryImpl<TYPE>(value));
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}
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/** Returns a null VarHashEntry if unsuccessful */
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template<class TYPE>
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VarHashEntry<TYPE>* VariableStoreTemplate<TYPE>::getVar(const XMLCh* namespaceURI,
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const XMLCh* name) const
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{
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unsigned int nsID=_uriPool.getId(namespaceURI);
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// if the namespace is not in the map, the variable is not there neither
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if(nsID!=0)
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return find(nsID, name)->get(nsID, name);
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return NULL;
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}
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template<class TYPE>
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VarHashEntry<TYPE>* VariableStoreTemplate<TYPE>::getGlobalVar(const XMLCh* namespaceURI,
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const XMLCh* name) const
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{
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unsigned int nsID=_uriPool.getId(namespaceURI);
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// if the namespace is not in the map, the variable is not there neither
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if(nsID!=0)
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return _global->get(nsID, name);
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return 0;
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}
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template<class TYPE>
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void VariableStoreTemplate<TYPE>::delVar( const XMLCh* namespaceURI, const XMLCh* name)
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{
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unsigned int nsID=_uriPool.getId(namespaceURI);
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// if the namespace is not in the map, the variable is not there neither
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if(nsID!=0)
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find(nsID, name)->remove(nsID, name);
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}
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template<class TYPE>
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void VariableStoreTemplate<TYPE>::delGlobalVar( const XMLCh* namespaceURI, const XMLCh* name)
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{
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unsigned int nsID=_uriPool.getId(namespaceURI);
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// if the namespace is not in the map, the variable is not there neither
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if(nsID!=0)
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_global->remove(nsID, name);
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}
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template<class TYPE>
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typename VariableStoreTemplate<TYPE>::MyScope* VariableStoreTemplate<TYPE>::find(unsigned int nsID, const XMLCh* name) const
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{
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// Check the local scopes
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MyScope* index=_current;
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while(index) {
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if(index->get(nsID, name)!=NULL)
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return index;
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if(index->getType() == MyScope::LOCAL_SCOPE)
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break;
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index=index->getNext();
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}
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// Check the global scope
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if(_global->get(nsID, name)!=NULL)
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return _global;
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// If we can't find it anywhere, then return the top level scope.
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// This lets us set it in the correct place.
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// For gets, we could return any scope.
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return _current==NULL?_global:_current;
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}
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#endif
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