org.springframework.http.converter.ActivationMediaTypeFactory Maven / Gradle / Ivy
/*
* Copyright 2002-2017 the original author or authors.
*
* Licensed 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.springframework.http.converter;
import java.io.IOException;
import java.io.InputStream;
import javax.activation.FileTypeMap;
import javax.activation.MimetypesFileTypeMap;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.http.MediaType;
import org.springframework.util.StringUtils;
/**
* Resolve {@code MediaType} for a given {@link Resource} using JAF.
*/
class ActivationMediaTypeFactory {
private static final FileTypeMap fileTypeMap;
static {
fileTypeMap = loadFileTypeMapFromContextSupportModule();
}
private static FileTypeMap loadFileTypeMapFromContextSupportModule() {
// See if we can find the extended mime.types from the context-support module...
Resource mappingLocation = new ClassPathResource("org/springframework/mail/javamail/mime.types");
if (mappingLocation.exists()) {
InputStream inputStream = null;
try {
inputStream = mappingLocation.getInputStream();
return new MimetypesFileTypeMap(inputStream);
}
catch (IOException ex) {
// ignore
}
finally {
if (inputStream != null) {
try {
inputStream.close();
}
catch (IOException ex) {
// ignore
}
}
}
}
return FileTypeMap.getDefaultFileTypeMap();
}
public static MediaType getMediaType(Resource resource) {
String filename = resource.getFilename();
if (filename != null) {
String mediaType = fileTypeMap.getContentType(filename);
if (StringUtils.hasText(mediaType)) {
return MediaType.parseMediaType(mediaType);
}
}
return null;
}
}