001    package org.apache.myfaces.tobago.facelets;
002    
003    /*
004     * Licensed to the Apache Software Foundation (ASF) under one or more
005     * contributor license agreements.  See the NOTICE file distributed with
006     * this work for additional information regarding copyright ownership.
007     * The ASF licenses this file to You under the Apache License, Version 2.0
008     * (the "License"); you may not use this file except in compliance with
009     * the License.  You may obtain a copy of the License at
010     *
011     *      http://www.apache.org/licenses/LICENSE-2.0
012     *
013     * Unless required by applicable law or agreed to in writing, software
014     * distributed under the License is distributed on an "AS IS" BASIS,
015     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016     * See the License for the specific language governing permissions and
017     * limitations under the License.
018     */
019    
020    import com.sun.facelets.FaceletContext;
021    import com.sun.facelets.tag.MetaRule;
022    import com.sun.facelets.tag.Metadata;
023    import com.sun.facelets.tag.MetadataTarget;
024    import com.sun.facelets.tag.TagAttribute;
025    import org.apache.myfaces.tobago.util.ComponentUtils;
026    import org.apache.myfaces.tobago.validator.FileItemValidator;
027    
028    public class ContentTypeRule extends MetaRule {
029    
030      public static final ContentTypeRule INSTANCE = new ContentTypeRule();
031    
032      public Metadata applyRule(String name, TagAttribute attribute, MetadataTarget metadataTarget) {
033        if ("contentType".equals(name)) {
034          return new ContentTypeRuleMapper(attribute);
035        }
036        return null;
037      }
038    
039      static final class ContentTypeRuleMapper extends Metadata {
040    
041        private final TagAttribute attribute;
042    
043        public ContentTypeRuleMapper(TagAttribute attribute) {
044          this.attribute = attribute;
045        }
046    
047        public void applyMetadata(FaceletContext ctx, Object instance) {
048          String[] components = ComponentUtils.splitList(attribute.getValue());
049          ((FileItemValidator) instance).setContentType(components);
050        }
051      }
052    }