/** Constructor. */
public ChunkTopicParser() {
super(false);
try {
reader = getXMLReader();
reader.setContentHandler(this);
reader.setFeature(FEATURE_NAMESPACE_PREFIX, true);
} catch (final Exception e) {
throw new RuntimeException("Failed to initialize XML parser: " + e.getMessage(), e);
}
}
private void processChunk(final Element topicref, final File outputFile) {
final String hrefValue = getValue(topicref, ATTRIBUTE_NAME_HREF);
final Collection<String> chunkValue = split(getValue(topicref, ATTRIBUTE_NAME_CHUNK));
final String copytoValue = getValue(topicref, ATTRIBUTE_NAME_COPY_TO);
final String scopeValue = getCascadeValue(topicref, ATTRIBUTE_NAME_SCOPE);
final String classValue = getValue(topicref, ATTRIBUTE_NAME_CLASS);
final String processRoleValue = getCascadeValue(topicref, ATTRIBUTE_NAME_PROCESSING_ROLE);
File outputFileName = outputFile;
Writer tempWriter = null;
Set<String> tempTopicID = null;
targetTopicId = null;
selectMethod = CHUNK_SELECT_DOCUMENT;
include = false;
boolean needWriteDitaTag = true;
try {
String parseFilePath;
if (copytoValue != null && !chunkValue.contains(CHUNK_TO_CONTENT)) {
if (getFragment(hrefValue) != null) {
parseFilePath = setFragment(copytoValue, getFragment(hrefValue));
} else {
parseFilePath = copytoValue;
}
} else {
parseFilePath = hrefValue;
}
// if @copy-to is processed in chunk module, the list file needs to
// be updated.
// Because @copy-to should be included in fulltopiclist, and the
// source of coyy-to should be excluded in fulltopiclist.
if (copytoValue != null && chunkValue.contains(CHUNK_TO_CONTENT) && hrefValue != null) {
copyto.add(copytoValue);
if (getFragment(hrefValue) != null) {
copytoSource.add(stripFragment(hrefValue));
copytotarget2source.put(toURI(copytoValue), toURI(stripFragment(hrefValue)));
} else {
copytoSource.add(hrefValue);
copytotarget2source.put(toURI(copytoValue), toURI(hrefValue));
}
}
if (parseFilePath != null && !ATTR_SCOPE_VALUE_EXTERNAL.equals(scopeValue)) {
// now the path to target file make sense
if (chunkValue.contains(CHUNK_TO_CONTENT)) {
// if current element contains "to-content" in chunk
// attribute
// we need to create new buffer and flush the buffer to
// file
// after processing is finished
tempWriter = output;
tempTopicID = topicID;
output = new StringWriter();
topicID = new HashSet<String>();
if (MAP_MAP.matches(classValue)) {
// Very special case, we have a map element with
// href value.
// This is a map that needs to be chunked to
// content.
// No need to parse any file, just generate a stub
// output.
outputFileName = resolve(filePath, parseFilePath);
needWriteDitaTag = false;
} else if (copytoValue != null) {
// use @copy-to value as the new file name
outputFileName = resolve(filePath, copytoValue);
} else if (hrefValue != null) {
// try to use href value as the new file name
if (chunkValue.contains(CHUNK_SELECT_TOPIC)
|| chunkValue.contains(CHUNK_SELECT_BRANCH)) {
if (getFragment(hrefValue) != null) {
// if we have an ID here, use it.
outputFileName = resolve(filePath, getFragment(hrefValue) + FILE_EXTENSION_DITA);
} else {
// Find the first topic id in target file if
// any.
final String firstTopic = getFirstTopicId(resolve(filePath, hrefValue).getPath());
if (firstTopic != null) {
outputFileName = resolve(filePath, firstTopic + FILE_EXTENSION_DITA);
} else {
outputFileName = resolve(filePath, hrefValue);
}
}
} else {
// otherwise, use the href value instead
outputFileName = resolve(filePath, hrefValue);
}
} else {
// use randomly generated file name
outputFileName = resolve(filePath, generateFilename());
}
// Check if there is any conflict
if (outputFileName.exists() && !MAP_MAP.matches(classValue)) {
final File t = outputFileName;
outputFileName = resolve(filePath, generateFilename());
conflictTable.put(outputFileName.getPath(), t.getPath());
}
// add newly generated file to changTable
// the new entry in changeTable has same key and value
// in order to indicate it is a newly generated file
changeTable.put(outputFileName.getPath(), outputFileName.getPath());
}
// "by-topic" couldn't reach here
this.outputFile = outputFileName;
final String path = resolveTopic(filePath, parseFilePath);
// FIXME: Should be URI
String newpath;
if (getFragment(path) != null) {
newpath = setFragment(outputFileName.getPath(), getFragment(path));
} else {
final String firstTopicID = getFirstTopicId(path);
if (firstTopicID != null) {
newpath = setFragment(outputFileName.getPath(), firstTopicID);
} else {
newpath = outputFileName.getPath();
}
}
// add file name changes to changeTable, this will be
// used in
// TopicRefWriter's updateHref method, very important!!!
changeTable.put(path, newpath);
// update current element's @href value
topicref.setAttribute(
ATTRIBUTE_NAME_HREF,
getRelativeUnixPath(filePath + UNIX_SEPARATOR + FILE_NAME_STUB_DITAMAP, newpath));
if (getFragment(parseFilePath) != null) {
targetTopicId = getFragment(parseFilePath);
}
final String s = getChunkByToken(chunkValue, "select-", null);
if (s != null) {
selectMethod = s;
// if the current topic href referred to a entire
// topic file,it will be handled in "document" level.
if (targetTopicId == null) {
selectMethod = CHUNK_SELECT_DOCUMENT;
}
}
final File tempPath = currentParsingFile;
currentParsingFile = resolve(filePath, parseFilePath);
if (!ATTR_PROCESSING_ROLE_VALUE_RESOURCE_ONLY.equals(processRoleValue)) {
currentParsingFileTopicIDChangeTable = new HashMap<String, String>();
// TODO recursive point
reader.parse(currentParsingFile.toURI().toString());
if (currentParsingFileTopicIDChangeTable.size() > 0) {
final URI href = toURI(topicref.getAttribute(ATTRIBUTE_NAME_HREF));
final String pathtoElem = href.getFragment() != null ? href.getFragment() : "";
final String old_elementid =
pathtoElem.contains(SLASH)
? pathtoElem.substring(0, pathtoElem.indexOf(SLASH))
: pathtoElem;
if (!old_elementid.isEmpty()) {
final String new_elementid = currentParsingFileTopicIDChangeTable.get(old_elementid);
if (new_elementid != null && !new_elementid.isEmpty()) {
topicref.setAttribute(
ATTRIBUTE_NAME_HREF, setFragment(href, new_elementid).toString());
}
}
}
currentParsingFileTopicIDChangeTable = null;
}
// restore the currentParsingFile
currentParsingFile = tempPath;
}
if (topicref.hasChildNodes()) {
// if current element has child nodes and chunk results for
// this element has value
// which means current element makes sense for chunk action.
final StringWriter tempOutput = (StringWriter) output;
output = new StringWriter();
final NodeList children = topicref.getChildNodes();
for (int i = 0; i < children.getLength(); i++) {
final Node current = children.item(i);
if (MAP_TOPICREF.matches(current)) {
processChunk((Element) current, outputFileName);
}
}
// merge results
final StringBuffer parentResult = tempOutput.getBuffer();
final CharSequence tmpContent = ((StringWriter) output).getBuffer();
// Skip empty parents and @processing-role='resource-only' entries.
// append into root topic
if (parentResult.length() > 0
&& parseFilePath != null
&& !ATTR_PROCESSING_ROLE_VALUE_RESOURCE_ONLY.equals(processRoleValue)) {
insertAfter(hrefValue, parentResult, tmpContent);
// replace contents
} else {
parentResult.append(tmpContent);
}
// restore back to parent's output this is a different temp
output = tempOutput;
}
if (chunkValue.contains(CHUNK_TO_CONTENT)) {
final String tmpContent = ((StringWriter) output).toString();
writeToContentChunk(tmpContent, outputFileName, needWriteDitaTag);
// restore back original output
output = tempWriter;
topicID = tempTopicID;
}
} catch (final RuntimeException e) {
throw e;
} catch (final Exception e) {
logger.error(e.getMessage(), e);
}
}