/*
* 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.tika.parser.xml;
import org.apache.commons.codec.binary.Base64;
import org.apache.tika.extractor.EmbeddedDocumentExtractor;
import org.apache.tika.extractor.ParsingEmbeddedDocumentExtractor;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.metadata.TikaMetadataKeys;
import org.apache.tika.mime.MediaType;
import org.apache.tika.parser.ParseContext;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Collections;
import java.util.Set;
public class FictionBookParser extends XMLParser {
private static final long serialVersionUID = 4195954546491524374L;
@Override
public Set<MediaType> getSupportedTypes(ParseContext context) {
return Collections.singleton(MediaType.application("x-fictionbook+xml"));
}
@Override
protected ContentHandler getContentHandler(ContentHandler handler, Metadata metadata, ParseContext context) {
EmbeddedDocumentExtractor ex = context.get(EmbeddedDocumentExtractor.class);
if (ex == null) {
ex = new ParsingEmbeddedDocumentExtractor(context);
}
return new BinaryElementsDataHandler(ex, handler);
}
private static class BinaryElementsDataHandler extends DefaultHandler {
private static final String ELEMENT_BINARY = "binary";
private boolean binaryMode = false;
private static final String ATTRIBUTE_ID = "id";
private final EmbeddedDocumentExtractor partExtractor;
private final ContentHandler handler;
private final StringBuilder binaryData = new StringBuilder();
private Metadata metadata;
private static final String ATTRIBUTE_CONTENT_TYPE = "content-type";
private BinaryElementsDataHandler(EmbeddedDocumentExtractor partExtractor, ContentHandler handler) {
this.partExtractor = partExtractor;
this.handler = handler;
}
@Override
public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
binaryMode = ELEMENT_BINARY.equals(localName);
if (binaryMode) {
binaryData.setLength(0);
metadata = new Metadata();
metadata.set(TikaMetadataKeys.RESOURCE_NAME_KEY, attributes.getValue(ATTRIBUTE_ID));
metadata.set(Metadata.CONTENT_TYPE, attributes.getValue(ATTRIBUTE_CONTENT_TYPE));
}
}
@Override
public void endElement(String uri, String localName, String qName) throws SAXException {
if (binaryMode) {
try {
partExtractor.parseEmbedded(
new ByteArrayInputStream(Base64.decodeBase64(binaryData.toString())),
handler,
metadata,
true
);
} catch (IOException e) {
throw new SAXException("IOException in parseEmbedded", e);
}
binaryMode = false;
binaryData.setLength(0);
}
}
@Override
public void characters(char[] ch, int start, int length) throws SAXException {
if (!binaryMode) {
handler.characters(ch, start, length);
} else {
binaryData.append(ch, start, length);
}
}
@Override
public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException {
handler.ignorableWhitespace(ch, start, length);
}
}
}