| /* |
| * 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.knox.gateway.util; |
| |
| import javax.activation.MimeType; |
| import javax.activation.MimeTypeParseException; |
| import java.nio.charset.StandardCharsets; |
| import java.util.HashMap; |
| import java.util.Locale; |
| import java.util.Map; |
| |
| public class MimeTypes { |
| |
| private static final String CHARSET_PARAMETER_NAME = "charset"; |
| |
| private static Map<String,String> DEFAULT_CHARSETS; |
| static { |
| DEFAULT_CHARSETS = new HashMap<>(); |
| DEFAULT_CHARSETS.put( "text/xml", StandardCharsets.UTF_8.name() ); |
| DEFAULT_CHARSETS.put( "text/json", StandardCharsets.UTF_8.name() ); |
| DEFAULT_CHARSETS.put( "application/xml", StandardCharsets.UTF_8.name() ); |
| DEFAULT_CHARSETS.put( "application/json", StandardCharsets.UTF_8.name() ); |
| } |
| |
| 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(Locale.ROOT) ); |
| } |
| return charset; |
| } |
| |
| } |