/*
* 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.sling.mailarchiveserver.impl;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.channels.FileChannel;
import java.util.Iterator;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Service;
import org.apache.james.mime4j.MimeException;
import org.apache.james.mime4j.dom.Message;
import org.apache.james.mime4j.dom.MessageBuilder;
import org.apache.james.mime4j.mboxiterator.CharBufferWrapper;
import org.apache.james.mime4j.mboxiterator.MboxIterator;
import org.apache.james.mime4j.message.DefaultMessageBuilder;
import org.apache.sling.mailarchiveserver.api.MboxParser;
import org.apache.sling.mailarchiveserver.util.MailArchiveServerConstants;
@Component
@Service(MboxParser.class)
public class Mime4jMboxParserImpl implements MboxParser {
@Override
public Iterator<Message> parse(InputStream is) throws IOException {
return new Mime4jParserIterator(is);
}
static class Mime4jParserIterator implements Iterator<Message> {
private Iterator<CharBufferWrapper> mboxIterator;
private static final int BUFFER_SIZE = 10*1024*1024;
String tempFileAbsPath = null;
public Mime4jParserIterator(InputStream is) throws IOException {
File tempFile = null;
FileOutputStream fileOS = null;
try {
// create temp file
tempFile = File.createTempFile("MAS_", ".mbox");
tempFileAbsPath = tempFile.getAbsolutePath();
fileOS = new FileOutputStream(tempFile);
FileChannel fileChannel = fileOS.getChannel();
byte[] buffer = new byte[BUFFER_SIZE];
int read = 0;
while ((read = is.read(buffer)) != -1) {
ByteBuffer buf2 = MailArchiveServerConstants.DEFAULT_ENCODER.encode(CharBuffer.wrap(new String(buffer, 0, read)));
fileChannel.write(buf2);
}
fileChannel.close();
createMboxIterator(tempFile);
} finally {
if (tempFile.exists()) {
tempFile.delete();
tempFile = null;
}
if (fileOS != null) {
fileOS.close();
fileOS = null;
}
if (is != null) {
is.close();
is = null;
}
}
}
private void createMboxIterator(File f) throws FileNotFoundException, IOException {
mboxIterator = MboxIterator.fromFile(f).charset(MailArchiveServerConstants.DEFAULT_ENCODER.charset()).build().iterator();
}
public boolean hasNext() {
return mboxIterator.hasNext();
}
public Message next() {
MessageBuilder builder = new DefaultMessageBuilder();
Message message = null;
try {
message = builder.parseMessage(new ByteArrayInputStream(mboxIterator.next().toString().getBytes(MailArchiveServerConstants.DEFAULT_ENCODER.charset().name())));
} catch (MimeException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return message;
}
public void remove() {
throw new UnsupportedOperationException();
}
}
}