/*
* 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.detect;
import java.io.InputStream;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.mime.MediaType;
/**
* Content type detection based on a content type hint. This detector simply
* trusts any valid content type hint given in the input metadata, and returns
* that as the likely type of the input document.
*
* @since Apache Tika 0.3
*/
public class TypeDetector implements Detector {
/**
* Detects the content type of an input document based on a type hint
* given in the input metadata. The CONTENT_TYPE attribute of the given
* input metadata is expected to contain the type of the input document.
* If that attribute exists and contains a valid type name, then that
* type is returned.
*
* @param input ignored
* @param metadata input metadata, possibly with a CONTENT_TYPE value
* @return detected media type, or <code>application/octet-stream</code>
*/
public MediaType detect(InputStream input, Metadata metadata) {
// Look for a type hint in the input metadata
String hint = metadata.get(Metadata.CONTENT_TYPE);
if (hint != null) {
MediaType type = MediaType.parse(hint);
if (type != null) {
return type;
}
}
return MediaType.OCTET_STREAM;
}
}