/*
* Copyright (C) 2011 4th Line GmbH, Switzerland
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.fourthline.lemma.processor.xhtml;
import com.sun.javadoc.RootDoc;
import org.fourthline.lemma.Constants;
import org.fourthline.lemma.anchor.CitationAnchor;
import org.fourthline.lemma.pipeline.Context;
import org.fourthline.lemma.processor.AbstractJavadocProcessor;
import org.fourthline.lemma.processor.ProcessorOptions;
import org.fourthline.lemma.reader.Reader;
import org.seamless.xhtml.XHTML;
import java.util.Stack;
import java.util.logging.Logger;
/**
* Recursively processes citation anchors in XHTML documents and fragments.
* <p>
* Starts processing with an XHTML document object model as input, each citation
* anchor in this DOM will be processed and the result (another DOM) will be
* recursively processed until no more citaton anchors are found. Finally, all
* citation anchors will be replaced with their respective result DOM.
* </p>
*
* @author Christian Bauer
*/
public class JavadocCitationProcessor extends AbstractJavadocProcessor<XHTML, XHTML> {
private Logger log = Logger.getLogger(JavadocCitationProcessor.class.getName());
public JavadocCitationProcessor(RootDoc rootDoc) {
super(rootDoc);
}
public XHTML process(XHTML input, Context context) {
log.fine("Processing input...");
XHTML output = processCitations(context, input, new Stack<CitationAnchor>());
/*
if (log.isLoggable(Level.FINEST)) {
log.finest("Completed processing input, generated output: ");
log.finest("--------------------------------------------------------------------------------");
log.finest(XML.toString(output, false));
log.finest("--------------------------------------------------------------------------------");
}
*/
ProcessorOptions processorOptions = (ProcessorOptions)context.get(ProcessorOptions.CONTEXT_PROCESSOR_OPTIONS);
if (processorOptions.processXRefs)
getParser().checkDuplicateIdentifiers(output);
return output;
}
protected XHTML processCitations(Context context, XHTML input, Stack<CitationAnchor> stack) {
CitationAnchor[] anchors = CitationAnchor.findCitationAnchors(getXPath(), input, Constants.TYPE_CITATION);
log.fine("Found citation anchors in input: " + anchors.length);
for (CitationAnchor citation : anchors) {
if (citation.getAddress() == null) continue;
// Use a stack to detect circular references
if (stack.contains(citation)) {
throw new IllegalStateException("Circular citations, remove: " + citation);
}
log.fine("Start processing: " + citation);
stack.push(citation);
Reader reader = getReader(citation);
XHTML result = reader.read(citation, context);
if (result == null) {
log.warning("Reader '" + reader.getClass() + "' did not produce a result for: " + citation);
continue;
}
// Parse it again recursively!
result = processCitations(context, result, stack);
// Now swap the citation element with the result root element
citation.getParent().replaceChild(citation, result.getRoot(getXPath()), false);
log.fine("Completed processing: " + citation);
stack.pop();
}
return input;
}
}