pjs/extensions/transformiix/source/xpath/BasicNodeExpr.cpp

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/*
* 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.
*
* $Id: BasicNodeExpr.cpp,v 1.2 2001-01-12 20:06:31 axel%pike.org Exp $
*/
#include "Expr.h"
/**
* @author <a href="mailto:kvisco@ziplink.net">Keith Visco</a>
* @version $Revision: 1.2 $ $Date: 2001-01-12 20:06:31 $
**/
//- Constructors -/
/**
* Creates a new BasicNodeExpr, which matchs any Node
**/
BasicNodeExpr::BasicNodeExpr() {
this->type = NodeExpr::NODE_EXPR;
} //-- BasicNodeExpr
/**
* Creates a new BasicNodeExpr of the given type
**/
BasicNodeExpr::BasicNodeExpr(NodeExpr::NodeExprType nodeExprType) {
this->type = nodeExprType;
} //-- BasicNodeExpr
/**
* Destroys this NodeExpr
**/
BasicNodeExpr::~BasicNodeExpr() {};
//------------------/
//- Public Methods -/
//------------------/
/**
* 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* BasicNodeExpr::evaluate(Node* context, ContextState* cs) {
NodeSet* nodeSet = new NodeSet();
if ( !context ) return nodeSet;
NodeList* nl = context->getChildNodes();
for (UInt32 i = 0; i < nl->getLength(); i++ ) {
Node* node = nl->item(i);
if (matches(node, context, cs)) nodeSet->add(node);
}
return nodeSet;
} //-- evaluate
//-----------------------------/
//- Methods from NodeExpr.cpp -/
//-----------------------------/
/**
* Returns the default priority of this Pattern based on the given Node,
* context Node, and ContextState.
* If this pattern does not match the given Node under the current context Node and
* ContextState then Negative Infinity is returned.
**/
double BasicNodeExpr::getDefaultPriority(Node* node, Node* context, ContextState* cs) {
return -0.5;
} //-- getDefaultPriority
/**
* Returns the type of this NodeExpr
* @return the type of this NodeExpr
**/
short BasicNodeExpr::getType() {
return type;
} //-- getType
/**
* Determines whether this NodeExpr matches the given node within
* the given context
**/
MBool BasicNodeExpr::matches(Node* node, Node* context, ContextState* cs) {
if ( !node ) return MB_FALSE;
switch ( type ) {
case NodeExpr::COMMENT_EXPR:
return (MBool) (node->getNodeType() == Node::COMMENT_NODE);
case NodeExpr::PI_EXPR :
return (MBool) (node->getNodeType() == Node::PROCESSING_INSTRUCTION_NODE);
default: //-- node()
break;
}
return MB_TRUE;
} //-- matches
/**
* Returns the String representation of this NodeExpr.
* @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 NodeExpr.
**/
void BasicNodeExpr::toString(String& dest) {
switch ( type ) {
case NodeExpr::COMMENT_EXPR:
dest.append("comment()");
break;
case NodeExpr::PI_EXPR :
dest.append("processing-instruction()");
break;
default: //-- node()
dest.append("node()");
break;
}
} //-- toString