/*
* 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.server;
import org.apache.tika.metadata.Metadata;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Arrays;
import au.com.bytecode.opencsv.CSVWriter;
@Provider
@Produces("text/csv")
public class CSVMessageBodyWriter implements MessageBodyWriter<Metadata> {
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return Metadata.class.isAssignableFrom(type);
}
public long getSize(Metadata data, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return -1;
}
@Override
@SuppressWarnings("resource")
public void writeTo(Metadata metadata, Class<?> type, Type genericType, Annotation[] annotations,
MediaType mediaType, MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream) throws IOException,
WebApplicationException {
CSVWriter writer = new CSVWriter(new OutputStreamWriter(entityStream, "UTF-8"));
for (String name : metadata.names()) {
String[] values = metadata.getValues(name);
ArrayList<String> list = new ArrayList<String>(values.length + 1);
list.add(name);
list.addAll(Arrays.asList(values));
writer.writeNext(list.toArray(values));
}
// Don't close, just flush the stream
writer.flush();
}
}