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Initial checkin for Olivier
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/*
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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 Olivier Gerardin are Copyright (C) 2000,
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* Olivier Gerardin. All rights reserved.
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*
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* Portions created by Keith Visco are Copyright (C) 2000, Keith Visco.
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* All rights reserved.
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*
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* Contributor(s):
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* Olivier Gerardin, ogerardin@vo.lu
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* -- original author.
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*/
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/**
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* DocumentFunctionCall
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* A representation of the XSLT additional function: document()
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*/
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#include "XSLTFunctions.h"
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#include "URIUtils.h"
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#include "XMLParser.h"
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/**
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* Creates a new DocumentFunctionCall.
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**/
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DocumentFunctionCall::DocumentFunctionCall(Document* xslDocument) : FunctionCall(DOCUMENT_FN)
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{
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this->xslDocument = xslDocument;
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} //-- DocumentFunctionCall
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/**
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* Evaluates this Expr based on the given context node and processor state
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* NOTE: the implementation is incomplete since it does not make use of the
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* second argument (base URI)
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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* DocumentFunctionCall::evaluate(Node* context, ContextState* cs) {
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NodeSet* nodeSet = new NodeSet();
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//-- document( object, node-set? )
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if ( requireParams(1, 2, cs) ) {
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ListIterator* iter = params.iterator();
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Expr* param1 = (Expr*) iter->next();
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ExprResult* exprResult1 = param1->evaluate(context, cs);
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NodeSet* nodeSet2 = 0;
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if (iter->hasNext()) {
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// we have 2 arguments, make sure the second is a NodeSet
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Expr* param2 = (Expr*) iter->next();
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ExprResult* exprResult2 = param2->evaluate(context, cs);
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if ( exprResult2->getResultType() != ExprResult::NODESET ) {
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String err("node-set expected as second argument to document()");
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cs->recieveError(err);
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delete exprResult2;
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}
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else {
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nodeSet2 = (NodeSet*) exprResult2;
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}
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}
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if ( exprResult1->getResultType() == ExprResult::NODESET ) {
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// The first argument is a NodeSet, iterate on its nodes
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NodeSet* nodeSet1 = (NodeSet*) exprResult1;
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for (int i=0; i<nodeSet1->size(); i++) {
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Node* node = nodeSet1->get(i);
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DOMString uriStr;
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XMLDOMUtils::getNodeValue(node, &uriStr);
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if (nodeSet2) {
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// if the second argument was specified, use it
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String baseUriStr;
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// TODO: retrieve the base URI of the first node of nodeSet2 in document order
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retrieveDocument(uriStr, baseUriStr, *nodeSet, cs);
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}
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else {
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// otherwise, use the base URI of the node itself
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String baseUriStr;
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// TODO: retrieve the base URI of node
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retrieveDocument(uriStr, baseUriStr, *nodeSet, cs);
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}
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}
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}
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else {
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// The first argument is not a NodeSet
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String uriStr;
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evaluateToString(param1, context, cs, uriStr);
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String baseUriStr;
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// TODO: retrieve the base URI of the first node of nodeSet2 in document order
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retrieveDocument(uriStr, baseUriStr, *nodeSet, cs);
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}
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delete exprResult1;
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delete nodeSet2;
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delete iter;
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}
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return nodeSet;
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} //-- evaluate
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/**
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* Retrieve the document designated by the URI uri, using baseUri as base URI if
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* necessary, parses it as an XML document, and append the resulting document node
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* to resultNodeSet.
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* NOTES: fragment identifiers in the URI are not supported
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*
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* @param uri the URI of the document to retrieve
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* @param baseUri the base URI used to resolve the URI if uri is relative
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* @param resultNodeSet the NodeSet to append the document to
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* @param cs the ContextState, used for reporting errors
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*/
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void DocumentFunctionCall::retrieveDocument(String& uri, String& baseUri, NodeSet& resultNodeSet, ContextState* cs)
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{
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if (uri.length() == 0) {
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// if uri is the empty String, the document is the stylesheet itself
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resultNodeSet.add(xslDocument);
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return;
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}
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// open URI
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istream* xmlInput = URIUtils::getInputStream(uri, baseUri, "error");
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if (!xmlInput) {
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String err("in document() function: failed to open URI: ");
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err.append(uri);
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cs->recieveError(err);
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return;
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}
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// parse document
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XMLParser xmlParser;
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Document* xmlDoc = xmlParser.parse(*xmlInput);
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if (!xmlDoc) {
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String err("in document() function: ");
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err.append(xmlParser.getErrorString());
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cs->recieveError(err);
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return;
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}
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// append the to resultNodeSet
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resultNodeSet.add(xmlDoc);
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}
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