ModelAction


1   package org.infoglue.cms.applications.common.actions;
2   
3   import java.util.ArrayList  ;
4   import java.util.Collection  ;
5   
6   import org.infoglue.cms.entities.kernel.Persistent;
7   import org.infoglue.cms.exception.ConstraintException;
8   
9   /**
10   * Base class to provide Actions with some common semantics for dealing with
11   * a specific domain object (model) and collections of domain objects (models).
12   *
13   * @author Frank Febbraro (frank@phase2technology.com)
14   */
15  public abstract class ModelAction extends InfoGlueAbstractAction
16  {
17      private Persistent model = createModel();
18      private Collection   models = new ArrayList  ();
19  
20      public Persistent getModel()
21      {
22          return model;
23      }
24  
25      protected void setModel(Persistent o)
26      {
27          model = (o == null) ? createModel() : o;
28      }
29  
30      public Collection   getModels()
31      {
32          return models;
33      }
34  
35      protected void setModels(Collection   c)
36      {
37          models = (c == null) ? new ArrayList  () : c;
38      }
39  
40      /**
41       * Template method used by subclasses to provide a new instance of the model.
42       * @return a new PersistentObject
43       */
44      protected abstract Persistent createModel();
45  
46      /**
47       * Perform the validation operation on the model
48       * @throws ConstraintException If a validation error exists
49       */
50      protected void validateModel() throws ConstraintException
51      {
52          getModel().validate().throwIfNotEmpty();
53      }
54  
55      /**
56       * Default implementation for WebworkAbstractAction, subclasses shold feel free to override
57       */
58      protected String   doExecute() throws Exception  
59      {
60          return SUCCESS;
61      }
62  
63      //-------------------------------------------------------------------------
64      // Override some methods to remove the reliance on anything HTTP.
65      // WebWork did a good job abstracting HTTP away, lets take advantage of it
66      //-------------------------------------------------------------------------
67  
68  }
69
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