2009/05/20 - Apache Shale has been retired.

For more information, please explore the Attic.


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  
18  /*
19   * $Id: AssignValidatorsCommand.java 464373 2006-10-16 04:21:54Z rahul $
20   */
21  package org.apache.shale.clay.component.chain;
22  
23  import java.util.Iterator;
24  
25  import javax.faces.component.EditableValueHolder;
26  import javax.faces.component.UIComponent;
27  
28  import org.apache.commons.chain.Catalog;
29  import org.apache.commons.chain.Command;
30  import org.apache.commons.chain.Context;
31  import org.apache.commons.logging.Log;
32  import org.apache.commons.logging.LogFactory;
33  import org.apache.shale.clay.config.Globals;
34  import org.apache.shale.clay.config.beans.ComponentBean;
35  import org.apache.shale.clay.config.beans.ValidatorBean;
36  
37  /***
38   * <p>
39   * If the {@link ComponentBean} has a {@link ValidatorBean} assigned, the
40   * {@link CreateValidatorCommand} is invoked.
41   * </p>
42   */
43  public class AssignValidatorsCommand extends AbstractCommand {
44  
45      /***
46       * <p>
47       * Common Logging utility.
48       * </p>
49       */
50      private static Log log;
51      static {
52          log = LogFactory.getLog(AssignValidatorsCommand.class);
53      }
54  
55      /***
56       * <p>
57       * Executes the {@link org.apache.shale.clay.component.chain.CreateValidatorCommand} using the
58       * <code>Globals.ADD_VALIDATOR_COMMAND_NAME</code> command to create a
59       * <code>Validator</code>.
60       *
61       * @param context common chains
62       * @return <code>true</code> if the chain is complete
63       * @exception Exception propagated up to the top of the chain
64       */
65      public boolean execute(Context context) throws Exception {
66  
67          boolean isFinal = false;
68  
69          ClayContext clayContext = (ClayContext) context;
70          if (clayContext == null) {
71              throw new NullPointerException(getMessages()
72                      .getMessage("clay.null.clayContext"));
73          }
74  
75          UIComponent child = (UIComponent) clayContext.getChild();
76          if (child == null) {
77              throw new NullPointerException(getMessages()
78                      .getMessage("clay.null.childComponent"));
79          }
80  
81          ComponentBean displayElement = clayContext.getDisplayElement();
82          if (displayElement == null) {
83              throw new NullPointerException(getMessages()
84                      .getMessage("clay.null.componentBean"));
85          }
86  
87          if (displayElement.getValidators().size() > 0) {
88              if (child instanceof EditableValueHolder) {
89  
90                  Iterator vi = displayElement.getValidatorIterator();
91                  while (vi.hasNext()) {
92                      ValidatorBean validator = (ValidatorBean) vi.next();
93  
94                      ClayContext subContext = (ClayContext) clayContext.clone();
95                      subContext.setDisplayElement(validator);
96                      subContext.setParent(child);
97  
98                      Catalog catalog = getCatalog();
99                      Command command = catalog
100                             .getCommand(Globals.ADD_VALIDATOR_COMMAND_NAME);
101                     command.execute(subContext);
102 
103                 }
104             } else {
105                 log.error(getMessages().getMessage("assign.validator.error",
106                         new Object[] { displayElement }));
107             }
108         }
109 
110         return isFinal;
111     }
112 
113 }