5c701fdeff
b=84677 r=Pike sr=shaver git-svn-id: svn://10.0.0.236/trunk@101359 18797224-902f-48f8-a5cc-f745e15eee43
153 lines
4.1 KiB
C++
153 lines
4.1 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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*/
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#include "Expr.h"
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//-------------/
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//- UnionExpr -/
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//-------------/
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/**
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* Creates a new UnionExpr
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**/
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UnionExpr::UnionExpr() {
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//-- do nothing
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}
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/**
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* Destructor, will delete all Path Expressions
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**/
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UnionExpr::~UnionExpr() {
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ListIterator* iter = expressions.iterator();
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while (iter->hasNext()) {
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iter->next();
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delete (Expr*)iter->remove();
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}
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delete iter;
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} //-- ~UnionExpr
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/**
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* Adds the Expr to this UnionExpr
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* @param expr the Expr to add to this UnionExpr
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**/
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void UnionExpr::addExpr(Expr* expr) {
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if (expr)
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expressions.add(expr);
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} //-- addExpr
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//-----------------------------/
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//- Virtual methods from Expr -/
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//-----------------------------/
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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* UnionExpr::evaluate(Node* context, ContextState* cs) {
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if (!context || (expressions.getLength() == 0))
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return new NodeSet(0);
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NodeSet* nodes = new NodeSet();
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ListIterator* iter = expressions.iterator();
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while (iter->hasNext()) {
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Expr* expr = (Expr*)iter->next();
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ExprResult* exprResult = expr->evaluate(context, cs);
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if (exprResult->getResultType() == ExprResult::NODESET) {
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((NodeSet*)exprResult)->copyInto(*nodes);
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}
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}
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delete iter;
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return nodes;
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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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**/
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double UnionExpr::getDefaultPriority(Node* node, Node* context,
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ContextState* cs) {
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//-- find highest priority
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double priority = Double::NEGATIVE_INFINITY;
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ListIterator iter(&expressions);
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while (iter.hasNext()) {
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Expr* expr = (Expr*)iter.next();
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double tmpPriority = expr->getDefaultPriority(node, context, cs);
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if (tmpPriority > priority && expr->matches(node, context, cs))
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priority = tmpPriority;
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}
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return priority;
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} //-- getDefaultPriority
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/**
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* Determines whether this UnionExpr matches the given node within
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* the given context
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**/
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MBool UnionExpr::matches(Node* node, Node* context, ContextState* cs) {
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ListIterator* iter = expressions.iterator();
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while (iter->hasNext()) {
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Expr* expr = (Expr*)iter->next();
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if (expr->matches(node, context, cs)) {
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delete iter;
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return MB_TRUE;
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}
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}
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delete iter;
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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 Expr.
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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 Expr.
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**/
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void UnionExpr::toString(String& dest) {
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ListIterator* iter = expressions.iterator();
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short count = 0;
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while (iter->hasNext()) {
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//-- set operator
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if (count > 0)
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dest.append(" | ");
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((Expr*)iter->next())->toString(dest);
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++count;
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}
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delete iter;
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} //-- toString
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