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AnyAtomicType.hpp

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00001 /*
00002  * Copyright (c) 2001, 2008,
00003  *     DecisionSoft Limited. All rights reserved.
00004  * Copyright (c) 2004, 2011,
00005  *     Oracle and/or its affiliates. All rights reserved.
00006  *
00007  * Licensed under the Apache License, Version 2.0 (the "License");
00008  * you may not use this file except in compliance with the License.
00009  * You may obtain a copy of the License at
00010  *
00011  *     http://www.apache.org/licenses/LICENSE-2.0
00012  *
00013  * Unless required by applicable law or agreed to in writing, software
00014  * distributed under the License is distributed on an "AS IS" BASIS,
00015  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00016  * See the License for the specific language governing permissions and
00017  * limitations under the License.
00018  */
00019 
00020 #ifndef _ANYATOMICTYPE_HPP
00021 #define _ANYATOMICTYPE_HPP
00022 
00023 #include <xqilla/framework/XQillaExport.hpp>
00024 #include <xqilla/items/Item.hpp>
00025 #include <xercesc/util/XercesDefs.hpp>
00026 
00027 class DynamicContext;
00028 class StaticContext;
00029 
00030 class XQILLA_API AnyAtomicType: public Item
00031 {
00032 
00033 public:
00034   enum AtomicObjectType {
00035     ANY_SIMPLE_TYPE    = 0,
00036     ANY_URI            = 1,
00037     BASE_64_BINARY     = 2,
00038     BOOLEAN            = 3,
00039     DATE               = 4,
00040     DATE_TIME          = 5,
00041     DAY_TIME_DURATION  = 6,
00042     DECIMAL            = 7,
00043     DOUBLE             = 8,
00044     DURATION           = 9,
00045     FLOAT              = 10,
00046     G_DAY              = 11,
00047     G_MONTH            = 12,
00048     G_MONTH_DAY        = 13,
00049     G_YEAR             = 14,
00050     G_YEAR_MONTH       = 15,
00051     HEX_BINARY         = 16,
00052     NOTATION           = 17,
00053     QNAME              = 18,
00054     STRING             = 19,
00055     TIME               = 20,
00056     UNTYPED_ATOMIC     = 21,
00057     YEAR_MONTH_DURATION= 22,
00058     NumAtomicObjectTypes= 23
00059   };
00060 
00061   typedef RefCountPointer<const AnyAtomicType> Ptr;
00062 
00063   /* isAtomicValue from Item */
00064   virtual bool isAtomicValue() const;
00065 
00066   /* isNode from Item */
00067   virtual bool isNode() const;
00068 
00069   virtual bool isFunction() const;
00070 
00071   /* is this type numeric?  Return false by default */
00072   virtual bool isNumericValue() const;
00073 
00074   /* is this type date or time based?  Return false by default */
00075   virtual bool isDateOrTimeTypeValue() const;
00076 
00077   /* Get the namespace uri of the primitive type (basic type) of this type */
00078   virtual const XMLCh* getPrimitiveTypeURI() const;
00079 
00080   /* Get the name of the primitive type (basic type) of this type (ie "decimal" for xs:decimal) */
00081   virtual const XMLCh* getPrimitiveTypeName() const = 0;
00082 
00083   /* Get the namespace URI for this type */
00084   virtual const XMLCh* getTypeURI() const = 0;
00085 
00086   /* Get the name of this type  (ie "integer" for xs:integer) */
00087   virtual const XMLCh* getTypeName() const = 0;
00088 
00089   virtual void generateEvents(EventHandler *events, const DynamicContext *context,
00090                               bool preserveNS = true, bool preserveType = true) const;
00091 
00092   /* If possible, cast this type to the target type  -- no casting table lookup made */
00093   AnyAtomicType::Ptr castAs(AtomicObjectType targetIndex, const DynamicContext* context) const;
00094 
00095   /* If possible, cast this type to the target type  -- no casting table lookup made */
00096   AnyAtomicType::Ptr castAsNoCheck(AtomicObjectType targetIndex, const XMLCh* targetURI, const XMLCh* targetType,
00097                                    const DynamicContext* context) const;
00098 
00099   /* If possible, cast this type to the target type  -- not virtual, this is the single entry point for casting */
00100   AnyAtomicType::Ptr castAs(AtomicObjectType targetIndex, const XMLCh* targetURI, const XMLCh* targetType,
00101                             const DynamicContext* context) const;
00102 
00103   /* Test if this type can be cast to the target type */
00104   virtual bool castable(AtomicObjectType targetIndex, const XMLCh* targetURI, const XMLCh* targetType,
00105                         const DynamicContext* context) const;
00106 
00107   /* returns the XMLCh* (canonical) representation of this type */
00108   virtual const XMLCh* asString(const DynamicContext* context) const = 0;
00109 
00110   /* returns true if the two objects are equal (whatever that means 
00111    * in the context of the datatype), false otherwise */
00112   virtual bool equals(const AnyAtomicType::Ptr &target, const DynamicContext* context) const = 0;
00113 
00114   /* Returns true if this typeName and uri match the given typeName and uri */
00115   virtual bool isOfType(const XMLCh* targetURI, const XMLCh* targetType, const DynamicContext* context) const;
00116 
00117   /* Returns true if this typeName and uri match the given typeName and uri,
00118    * or if any of this type's parents match the given typeName and uri */
00119   virtual bool isInstanceOfType(const XMLCh* targetURI, const XMLCh* targetType, const StaticContext* context) const;
00120 
00121   virtual void typeToBuffer(DynamicContext *context, XERCES_CPP_NAMESPACE_QUALIFIER XMLBuffer &buffer) const;
00122   
00135   bool castIsSupported(AtomicObjectType targetIndex, const DynamicContext* context) const;
00136 
00137   virtual AtomicObjectType getPrimitiveTypeIndex() const = 0;
00138  
00139   static const XMLCh fgDT_ANYATOMICTYPE[];
00140 
00141 protected:
00142   /* internal castAs method.  This one is virtual and does the real work */
00143   virtual AnyAtomicType::Ptr castAsInternal(AtomicObjectType targetIndex, const XMLCh* targetURI,
00144                                             const XMLCh* targetType, const DynamicContext* context) const;
00145 
00146 private:
00147 
00148   //friend class CastTable;
00149   //template <class TYPE> friend class DatatypeFactoryTemplate;
00150 
00151   // class that implements the Casting Table
00152   class CastTable {
00153     public: 
00154         CastTable();
00155         bool getCell(AtomicObjectType source, 
00156                      AtomicObjectType target) const;
00157     private:
00158         bool staticCastTable[NumAtomicObjectTypes][NumAtomicObjectTypes];
00159   };
00160 
00161 
00162   // reproduction of the XPath2 casting table: http://www.w3.org/TR/xquery-operators/#casting
00163   static const CastTable staticCastTable;  
00164 };
00165 
00166 #endif