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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.myfaces.tobago.renderkit.html.scarborough.standard.tag;
21  
22  import org.apache.myfaces.tobago.internal.component.AbstractUIInput;
23  import org.apache.myfaces.tobago.internal.util.DateFormatUtils;
24  import org.apache.myfaces.tobago.renderkit.html.DataAttributes;
25  import org.apache.myfaces.tobago.webapp.TobagoResponseWriter;
26  import org.slf4j.Logger;
27  import org.slf4j.LoggerFactory;
28  
29  import javax.faces.context.FacesContext;
30  import javax.faces.convert.Converter;
31  import javax.faces.convert.DateTimeConverter;
32  import java.io.IOException;
33  
34  public class DateRenderer extends InRenderer {
35  
36    private static final Logger LOG = LoggerFactory.getLogger(DateRenderer.class);
37  
38    @Override
39    protected void writeAdditionalAttributes(
40        FacesContext facesContext, TobagoResponseWriter writer, AbstractUIInput input) throws IOException {
41      super.writeAdditionalAttributes(facesContext, writer, input);
42  
43      String pattern = null;
44      Converter help = getConverter(facesContext, input);
45      if (help instanceof DateTimeConverter) {
46        DateTimeConverter converter = (DateTimeConverter) help;
47        pattern = DateFormatUtils.findPattern(converter);
48      }
49      if (pattern == null) {
50        pattern = "yyyy-MM-dd";
51        LOG.warn("Can't find the pattern for the converter! DatePicker may not work correctly. "
52            + "Trying to use: '" + pattern + "'");
53      }
54  
55      writer.writeAttribute(DataAttributes.PATTERN, pattern, true);
56    }
57  }
58