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package nokogiri;
import nokogiri.internals.ClosedStreamException;
import nokogiri.internals.NokogiriBlockingQueueInputStream;
import nokogiri.internals.NokogiriHelpers;
import nokogiri.internals.ParserContext;
import org.jruby.Ruby;
import org.jruby.RubyClass;
import org.jruby.RubyObject;
import org.jruby.anno.JRubyClass;
import org.jruby.anno.JRubyMethod;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.concurrent.*;
import static nokogiri.XmlSaxPushParser.terminateExecution;
import static nokogiri.internals.NokogiriHelpers.getNokogiriClass;
import static org.jruby.runtime.Helpers.invoke;
/**
* Class for Nokogiri::HTML4::SAX::PushParser
*
* @author
* @author Piotr Szmielew <p.szmielew@ava.waw.pl> - based on Nokogiri::XML::SAX::PushParser
*/
@JRubyClass(name = "Nokogiri::HTML4::SAX::PushParser")
public class Html4SaxPushParser extends RubyObject
{
ParserContext.Options options;
IRubyObject saxParser;
NokogiriBlockingQueueInputStream stream;
private ParserTask parserTask = null;
private FutureTask<Html4SaxParserContext> futureTask = null;
private ExecutorService executor = null;
public
Html4SaxPushParser(Ruby ruby, RubyClass rubyClass)
{
super(ruby, rubyClass);
}
@Override
public void
finalize()
{
try {
terminateImpl();
} catch (Exception e) { /* ignored */ }
}
@JRubyMethod
public IRubyObject
initialize_native(final ThreadContext context,
IRubyObject saxParser,
IRubyObject fileName,
IRubyObject encoding)
{
// NOTE: Silently skips provided encoding
options = new ParserContext.Options(0);
this.saxParser = saxParser;
return this;
}
private transient IRubyObject parse_options;
private IRubyObject
parse_options(final ThreadContext context)
{
if (parse_options == null) {
parse_options = invoke(context, context.runtime.getClassFromPath("Nokogiri::XML::ParseOptions"), "new");
}
return parse_options;
}
@JRubyMethod(name = "options")
public IRubyObject
getOptions(ThreadContext context)
{
return invoke(context, parse_options(context), "options");
}
@JRubyMethod(name = "options=")
public IRubyObject
setOptions(ThreadContext context, IRubyObject opts)
{
invoke(context, parse_options(context), "options=", opts);
options = new ParserContext.Options(opts.convertToInteger().getLongValue());
return getOptions(context);
}
@JRubyMethod
public IRubyObject
native_write(ThreadContext context, IRubyObject chunk, IRubyObject isLast)
{
try {
initialize_task(context);
} catch (IOException e) {
throw context.getRuntime().newRuntimeError(e.getMessage());
}
final ByteArrayInputStream data = NokogiriHelpers.stringBytesToStream(chunk);
if (data == null) {
terminateTask(context.runtime);
throw XmlSyntaxError.createHTMLSyntaxError(context.runtime).toThrowable(); // Nokogiri::HTML4::SyntaxError
}
int errorCount0 = parserTask.getErrorCount();
if (isLast.isTrue()) {
IRubyObject document = invoke(context, this, "document");
invoke(context, document, "end_document");
terminateTask(context.runtime);
} else {
try {
Future<Void> task = stream.addChunk(data);
task.get();
} catch (ClosedStreamException ex) {
// this means the stream is closed, ignore this exception
} catch (Exception e) {
throw context.runtime.newRuntimeError(e.getMessage());
}
}
if (!options.recover && parserTask.getErrorCount() > errorCount0) {
terminateTask(context.runtime);
throw parserTask.getLastError().toThrowable();
}
return this;
}
@SuppressWarnings("unchecked")
private void
initialize_task(ThreadContext context) throws IOException
{
if (futureTask == null || stream == null) {
stream = new NokogiriBlockingQueueInputStream();
assert saxParser != null : "saxParser null";
parserTask = new ParserTask(context, saxParser, stream);
futureTask = new FutureTask<Html4SaxParserContext>((Callable) parserTask);
executor = Executors.newSingleThreadExecutor(new ThreadFactory() {
@Override
public Thread newThread(Runnable r) {
Thread t = new Thread(r);
t.setName("Html4SaxPushParser");
t.setDaemon(true);
return t;
}
});
executor.submit(futureTask);
}
}
private void
terminateTask(final Ruby runtime)
{
if (executor == null) { return; }
try {
terminateImpl();
} catch (InterruptedException e) {
throw runtime.newRuntimeError(e.toString());
} catch (Exception e) {
throw runtime.newRuntimeError(e.toString());
}
}
private synchronized void
terminateImpl() throws InterruptedException, ExecutionException
{
terminateExecution(executor, stream, futureTask);
executor = null;
stream = null;
futureTask = null;
}
private static Html4SaxParserContext
parse(final Ruby runtime, final InputStream stream)
{
RubyClass klazz = getNokogiriClass(runtime, "Nokogiri::HTML4::SAX::ParserContext");
return Html4SaxParserContext.parse_stream(runtime, klazz, stream);
}
static class ParserTask extends XmlSaxPushParser.ParserTask /* <Html4SaxPushParser> */
{
private
ParserTask(ThreadContext context, IRubyObject handler, InputStream stream)
{
super(context, handler, parse(context.runtime, stream), stream);
}
@Override
public Html4SaxParserContext
call() throws Exception
{
return (Html4SaxParserContext) super.call();
}
}
}
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