/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jackrabbit.core.query.lucene;
import java.io.InputStream;
import java.util.Collections;
import java.util.Set;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.mime.MediaType;
import org.apache.tika.parser.EmptyParser;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.sax.XHTMLContentHandler;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
public class BlockingParser extends EmptyParser {
public static final MediaType TYPE = MediaType.application("x-blocked");
/**
* Flag for blocking text extraction.
*/
private static volatile boolean blocked = false;
/**
* Waits until text extraction is no longer blocked.
*/
private synchronized static void waitIfBlocked() {
try {
while (blocked) {
BlockingParser.class.wait();
}
} catch (InterruptedException e) {
throw new RuntimeException("Text extraction block interrupted", e);
}
}
/**
* Blocks text extraction.
*/
static synchronized void block() {
blocked = true;
}
/**
* Unblocks text extraction.
*/
static synchronized void unblock() {
blocked = false;
BlockingParser.class.notifyAll();
}
@Override
public Set<MediaType> getSupportedTypes(ParseContext context) {
return Collections.singleton(TYPE);
}
@Override
public void parse(
InputStream stream, ContentHandler handler,
Metadata metadata, ParseContext context)
throws SAXException {
waitIfBlocked();
XHTMLContentHandler xhtml = new XHTMLContentHandler(handler, metadata);
xhtml.startDocument();
xhtml.element("p", "The quick brown fox jumped over the lazy dog.");
xhtml.endDocument();
}
}