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Java > Open Source Codes > org > apache > geronimo > activation > handlers > AbstractTextHandler


1 /**
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License. You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 package org.apache.geronimo.activation.handlers;
18
19 import java.awt.datatransfer.DataFlavor JavaDoc;
20 import java.awt.datatransfer.UnsupportedFlavorException JavaDoc;
21 import java.io.IOException JavaDoc;
22 import java.io.InputStreamReader JavaDoc;
23 import java.io.OutputStream JavaDoc;
24 import java.io.OutputStreamWriter JavaDoc;
25 import java.io.Reader JavaDoc;
26 import javax.activation.DataContentHandler JavaDoc;
27 import javax.activation.DataSource JavaDoc;
28
29 /**
30  * @version $Rev: 476049 $ $Date: 2006-11-16 23:35:17 -0500 (Thu, 16 Nov 2006) $
31  */
32 public class AbstractTextHandler implements DataContentHandler JavaDoc {
33     private final DataFlavor JavaDoc flavour;
34
35     public AbstractTextHandler(DataFlavor JavaDoc flavour) {
36         this.flavour = flavour;
37     }
38
39     public DataFlavor JavaDoc[] getTransferDataFlavors() {
40         return new DataFlavor JavaDoc[] {flavour};
41     }
42
43     public Object JavaDoc getTransferData(DataFlavor JavaDoc dataFlavor, DataSource JavaDoc dataSource) throws UnsupportedFlavorException JavaDoc, IOException JavaDoc {
44         return flavour.equals(dataFlavor) ? getContent(dataSource) : null;
45     }
46
47     public Object JavaDoc getContent(DataSource JavaDoc ds) throws IOException JavaDoc {
48         // todo handle encoding
49 Reader JavaDoc reader = new InputStreamReader JavaDoc(ds.getInputStream());
50         StringBuffer JavaDoc result = new StringBuffer JavaDoc(1024);
51         char[] buffer = new char[32768];
52         int count;
53         while ((count = reader.read(buffer)) != -1) {
54             result.append(buffer, 0, count);
55         }
56         return result.toString();
57     }
58
59     public void writeTo(Object JavaDoc o, String JavaDoc mimeType, OutputStream JavaDoc os) throws IOException JavaDoc {
60         String JavaDoc s;
61         if (o instanceof String JavaDoc) {
62             s = (String JavaDoc) o;
63         } else if (o != null) {
64             s = o.toString();
65         } else {
66             return;
67         }
68         // todo handle encoding
69 OutputStreamWriter JavaDoc writer = new OutputStreamWriter JavaDoc(os);
70         writer.write(s);
71         writer.flush();
72     }
73 }
74
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