117 lines
3.1 KiB
C++
117 lines
3.1 KiB
C++
/*
|
|
* The contents of this file are subject to the Mozilla Public
|
|
* License Version 1.1 (the "License"); you may not use this file
|
|
* except in compliance with the License. You may obtain a copy of
|
|
* the License at http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS
|
|
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
|
* implied. See the License for the specific language governing
|
|
* rights and limitations under the License.
|
|
*
|
|
* The Original Code is TransforMiiX XSLT processor.
|
|
*
|
|
* The Initial Developer of the Original Code is The MITRE Corporation.
|
|
* Portions created by MITRE are Copyright (C) 1999 The MITRE Corporation.
|
|
*
|
|
* Portions created by Keith Visco as a Non MITRE employee,
|
|
* (C) 1999 Keith Visco. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Keith Visco, kvisco@ziplink.net
|
|
* -- original author.
|
|
*
|
|
*/
|
|
|
|
#include "Expr.h"
|
|
#include "NodeSet.h"
|
|
|
|
//-------------/
|
|
//- UnionExpr -/
|
|
//-------------/
|
|
|
|
|
|
/**
|
|
* Creates a new UnionExpr
|
|
**/
|
|
UnionExpr::UnionExpr() {
|
|
//-- do nothing
|
|
}
|
|
|
|
/**
|
|
* Destructor, will delete all Path Expressions
|
|
**/
|
|
UnionExpr::~UnionExpr() {
|
|
txListIterator iter(&expressions);
|
|
while (iter.hasNext()) {
|
|
delete (Expr*)iter.next();
|
|
}
|
|
} //-- ~UnionExpr
|
|
|
|
/**
|
|
* Adds the Expr to this UnionExpr
|
|
* @param expr the Expr to add to this UnionExpr
|
|
**/
|
|
void UnionExpr::addExpr(Expr* expr) {
|
|
if (expr)
|
|
expressions.add(expr);
|
|
} //-- addExpr
|
|
|
|
//-----------------------------/
|
|
//- Virtual methods from Expr -/
|
|
//-----------------------------/
|
|
|
|
/**
|
|
* Evaluates this Expr based on the given context node and processor state
|
|
* @param context the context node for evaluation of this Expr
|
|
* @param ps the ContextState containing the stack information needed
|
|
* for evaluation
|
|
* @return the result of the evaluation
|
|
**/
|
|
ExprResult* UnionExpr::evaluate(txIEvalContext* aContext)
|
|
{
|
|
NodeSet* nodes = new NodeSet();
|
|
|
|
if (!aContext || (expressions.getLength() == 0) || !nodes)
|
|
return nodes;
|
|
|
|
txListIterator iter(&expressions);
|
|
|
|
while (iter.hasNext()) {
|
|
Expr* expr = (Expr*)iter.next();
|
|
ExprResult* exprResult = expr->evaluate(aContext);
|
|
if (!exprResult ||
|
|
exprResult->getResultType() != ExprResult::NODESET) {
|
|
delete exprResult;
|
|
delete nodes;
|
|
return new StringResult(NS_LITERAL_STRING("error"));
|
|
}
|
|
nodes->add((NodeSet*)exprResult);
|
|
delete exprResult;
|
|
}
|
|
|
|
return nodes;
|
|
} //-- evaluate
|
|
|
|
/**
|
|
* Returns the String representation of this Expr.
|
|
* @param dest the String to use when creating the String
|
|
* representation. The String representation will be appended to
|
|
* any data in the destination String, to allow cascading calls to
|
|
* other #toString() methods for Expressions.
|
|
* @return the String representation of this Expr.
|
|
**/
|
|
void UnionExpr::toString(String& dest) {
|
|
txListIterator iter(&expressions);
|
|
|
|
short count = 0;
|
|
while (iter.hasNext()) {
|
|
//-- set operator
|
|
if (count > 0)
|
|
dest.Append(NS_LITERAL_STRING(" | "));
|
|
((Expr*)iter.next())->toString(dest);
|
|
++count;
|
|
}
|
|
} //-- toString
|
|
|