001    // Copyright 2008, 2010 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    // http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.internal.services;
016    
017    import java.io.IOException;
018    import java.io.PrintWriter;
019    
020    import org.apache.tapestry5.ContentType;
021    import org.apache.tapestry5.SymbolConstants;
022    import org.apache.tapestry5.internal.InternalConstants;
023    import org.apache.tapestry5.ioc.annotations.Symbol;
024    import org.apache.tapestry5.json.JSONArray;
025    import org.apache.tapestry5.services.ComponentEventResultProcessor;
026    import org.apache.tapestry5.services.Response;
027    
028    public class JSONArrayEventResultProcessor implements ComponentEventResultProcessor<JSONArray>
029    {
030        private final Response response;
031    
032        private final String outputEncoding;
033    
034        private final boolean compactJSON;
035    
036        public JSONArrayEventResultProcessor(Response response,
037    
038        @Symbol(SymbolConstants.CHARSET)
039        String outputEncoding,
040    
041        @Symbol(SymbolConstants.COMPACT_JSON)
042        boolean compactJSON)
043        {
044            this.response = response;
045            this.outputEncoding = outputEncoding;
046            this.compactJSON = compactJSON;
047        }
048    
049        public void processResultValue(JSONArray value) throws IOException
050        {
051            ContentType contentType = new ContentType(InternalConstants.JSON_MIME_TYPE, outputEncoding);
052    
053            PrintWriter pw = response.getPrintWriter(contentType.toString());
054    
055            value.print(pw, compactJSON);
056    
057            pw.close();
058        }
059    }