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83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is TransforMiiX XSLT processor.
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*
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* The Initial Developer of the Original Code is The MITRE Corporation.
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* Portions created by MITRE are Copyright (C) 1999 The MITRE Corporation.
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*
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* Portions created by Keith Visco as a Non MITRE employee,
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* (C) 1999 Keith Visco. All Rights Reserved.
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*
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* Contributor(s):
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* Keith Visco, kvisco@ziplink.net
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* -- original author.
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*
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* $Id: RootExpr.cpp,v 1.1 2000/04/06 07:45:39 kvisco%ziplink.net Exp $
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*/
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#include "Expr.h"
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MBool RootExpr::isAbsolute() {
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return MB_TRUE;
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} //-- isAbsolute
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/**
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* Evaluates this Expr based on the given context node and processor state
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* @param context the context node for evaluation of this Expr
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* @param ps the ContextState containing the stack information needed
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* for evaluation
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* @return the result of the evaluation
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**/
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ExprResult* RootExpr::evaluate(Node* context, ContextState* cs) {
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NodeSet* nodeSet = new NodeSet();
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if ( !context ) return nodeSet;
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nodeSet->add(context->getOwnerDocument());
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return nodeSet;
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} //-- evaluate
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/**
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* Returns the default priority of this Pattern based on the given Node,
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* context Node, and ContextState.
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* If this pattern does not match the given Node under the current context Node and
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* ContextState then Negative Infinity is returned.
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**/
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double RootExpr::getDefaultPriority(Node* node, Node* context, ContextState* cs) {
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if ( matches(node, context, cs) ) {
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return 0.5;
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}
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else return Double::NEGATIVE_INFINITY;
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} //-- getDefaultPriority
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/**
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* Determines whether this NodeExpr matches the given node within
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* the given context
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**/
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MBool RootExpr::matches(Node* node, Node* context, ContextState* cs) {
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if ( node ) {
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return (MBool) (node->getNodeType() == Node::DOCUMENT_NODE);
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}
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return MB_FALSE;
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} //-- matches
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/**
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* Returns the String representation of this PatternExpr.
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* @param dest the String to use when creating the String
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* representation. The String representation will be appended to
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* any data in the destination String, to allow cascading calls to
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* other #toString() methods for Expressions.
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* @return the String representation of this PatternExpr.
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**/
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void RootExpr::toString(String& dest) {
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dest.append('/');
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} //-- toString
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