static_collection_manager.h
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00001 /*
00002  * Copyright 2006-2011 The FLWOR Foundation.
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  * http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 #ifndef ZORBA_STATICCOLLECTIONMANAGER_API_H
00017 #define ZORBA_STATICCOLLECTIONMANAGER_API_H
00018 
00019 #include <zorba/config.h>
00020 #include <zorba/api_shared_types.h>
00021 #include <zorba/collection_manager.h>
00022 
00023 namespace zorba {
00024 
00025   /** \brief Using the StaticCollectionManager one can retrieve information
00026    *   about statically declared collections as well as manage them.
00027    *
00028    * The StaticCollectionManager can be retrieved from (1) a compiled XQuery
00029    * or (2) a StaticContext object. In both cases, this class provides access
00030    * to information for the collections that are declared in (1) all the
00031    * modules (transitively) imported by the main query or (2) the module
00032    * that resulted in the compilation of the StaticContext, respectively.
00033    * Moreover, this class allows to create or delete such collections.
00034    *
00035    */
00036   class ZORBA_DLL_PUBLIC StaticCollectionManager : public CollectionManager
00037   {
00038   public:
00039     /**
00040      * List all the collections that are declared in the XQuery or the
00041      * StaticContext that was used to retrieve this StaticCollectionManager.
00042      *
00043      * @return a sequence of QNames of all said collections
00044      */
00045     virtual ItemSequence_t
00046     declaredCollections() const = 0;
00047 
00048     /**
00049      * Checks if a collection with a given QName is declared in the XQuery
00050      * or the StaticContext that was used to retrieve this
00051      * StaticCollectionManager.
00052      *
00053      * @return true if a collection with the given name is declared,
00054      *   false otherwise.
00055      */
00056     virtual bool
00057     isDeclaredCollection(const Item& aQName) const = 0;
00058 
00059     virtual ~StaticCollectionManager() {}
00060 
00061   }; /* class StaticCollectionManager */
00062 
00063 } /* namespace zorba */
00064 #endif
00065 /* vim:set et sw=2 ts=2: */
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