130 lines
3.5 KiB
C++
130 lines
3.5 KiB
C++
/*
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* Copyright (c) 2001-2008
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* DecisionSoft Limited. All rights reserved.
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* Copyright (c) 2004-2008
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* Oracle. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* $Id: ASTNode.hpp 475 2008-01-08 18:47:44Z jpcs $
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*/
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#ifndef _ASTNODE_HPP
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#define _ASTNODE_HPP
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#include <vector>
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#include <xqilla/framework/XQillaExport.hpp>
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#include <xqilla/framework/XPath2MemoryManager.hpp>
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#include <xqilla/ast/LocationInfo.hpp>
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class DynamicContext;
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class StaticContext;
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class Result;
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class StaticAnalysis;
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class PendingUpdateList;
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class EventHandler;
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class XQILLA_API ASTNode : public LocationInfo
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{
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public:
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///enum for data types
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typedef enum {
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LITERAL,
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SEQUENCE,
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FUNCTION,
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NAVIGATION,
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VARIABLE,
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STEP,
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IF,
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INSTANCE_OF,
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CASTABLE_AS,
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CAST_AS,
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TREAT_AS,
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OPERATOR,
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CONTEXT_ITEM,
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PARENTHESIZED,
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DOM_CONSTRUCTOR,
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QUANTIFIED,
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TYPESWITCH,
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VALIDATE,
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FUNCTION_CALL,
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USER_FUNCTION,
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ORDERING_CHANGE,
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XPATH1_CONVERT,
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PROMOTE_UNTYPED,
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PROMOTE_NUMERIC,
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PROMOTE_ANY_URI,
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DOCUMENT_ORDER,
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PREDICATE,
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ATOMIZE,
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FTCONTAINS,
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UDELETE,
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URENAME,
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UREPLACE,
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UREPLACE_VALUE_OF,
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UTRANSFORM,
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UINSERT_AS_FIRST,
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UINSERT_AS_LAST,
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UINSERT_INTO,
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UINSERT_AFTER,
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UINSERT_BEFORE,
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UAPPLY_UPDATES,
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NAME_EXPRESSION,
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CONTENT_SEQUENCE,
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DIRECT_NAME,
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RETURN
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} whichType;
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ASTNode() : userData_(0) {}
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virtual ~ASTNode() {}
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/** Returns a Result iterator for the results of this expression.
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The flags parameter is currently unused */
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virtual Result createResult(DynamicContext* context, int flags=0) const = 0;
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/** Returns the result of this expression via the EventHandler provided. */
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virtual void generateEvents(EventHandler *events, DynamicContext *context,
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bool preserveNS, bool preserveType) const = 0;
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/// Executes an update expression
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virtual PendingUpdateList createUpdateList(DynamicContext *context) const = 0;
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/** Returns true if this ASTNode has no predicates, and is an instance of
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XQSequence or XQLiteral */
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virtual bool isConstant() const = 0;
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/** Returns true if this ASTNode has no predicates, and is an instance of
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XQSequence or XQLiteral. If the literal value of this ASTNode
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is a single DateOrTimeType, then !hasTimezone() on it must return true,
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otherwise this method will return false. */
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virtual bool isDateOrTimeAndHasNoTimezone(StaticContext* context) const = 0;
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virtual bool isSingleNumericConstant(StaticContext *context) const = 0;
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virtual whichType getType(void) const = 0;
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virtual ASTNode *staticResolution(StaticContext *context) = 0;
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virtual ASTNode *staticTyping(StaticContext *context) = 0;
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/// Returns the StaticAnalysis for this ASTNode
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virtual const StaticAnalysis &getStaticAnalysis() const = 0;
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void *getUserData() const { return userData_; }
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void setUserData(void *data) { userData_ = data; }
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private:
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void *userData_;
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};
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typedef std::vector<ASTNode*,XQillaAllocator<ASTNode*> > VectorOfASTNodes;
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#endif
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