/**
* 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.hadoop.gateway.util;
import java.util.HashMap;
import java.util.Map;
import javax.activation.MimeType;
import javax.activation.MimeTypeParseException;
public class MimeTypes {
private static final String CHARSET_PARAMETER_NAME = "charset";
private static final String UTF8_CHARSET = "UTF-8";
private static Map<String,String> DEFAULT_CHARSETS;
static {
DEFAULT_CHARSETS = new HashMap<>();
DEFAULT_CHARSETS.put( "text/xml", UTF8_CHARSET );
DEFAULT_CHARSETS.put( "text/json", UTF8_CHARSET );
DEFAULT_CHARSETS.put( "application/xml", UTF8_CHARSET );
DEFAULT_CHARSETS.put( "application/json", UTF8_CHARSET );
}
public static MimeType create( final String base, final String encoding ) {
MimeType type = null;
if( base != null ) {
try {
type = new MimeType( base );
if( encoding != null && getCharset( type, null ) == null ) {
setCharset( type, encoding );
}
} catch( MimeTypeParseException e ) {
throw new IllegalArgumentException( base, e );
}
}
return type;
}
public static String getCharset( final MimeType type, String defaultCharset ) {
String charset = null;
if( type != null ) {
charset = type.getParameter( CHARSET_PARAMETER_NAME );
}
if( charset == null ) {
charset = defaultCharset;
}
return charset;
}
public static void setCharset( final MimeType type, final String charset ) {
type.setParameter( CHARSET_PARAMETER_NAME, charset );
}
public static String getDefaultCharsetForMimeType( final String mimeType ) {
String charset = null;
if( mimeType != null ) {
charset = DEFAULT_CHARSETS.get( mimeType.trim().toLowerCase() );
}
return charset;
}
}