1 /**
2 * Copyright 2005-2013 The Kuali Foundation
3 *
4 * Licensed under the Educational Community License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.opensource.org/licenses/ecl2.php
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.kuali.rice.krad.uif.service;
17
18 import org.kuali.rice.krad.uif.UifConstants;
19 import org.kuali.rice.krad.uif.view.View;
20 import org.kuali.rice.krad.uif.UifConstants.ViewType;
21
22 import java.util.Map;
23
24 /**
25 * Provides service methods for retrieving and updating <code>View</code> instances. The UIF
26 * interacts with this service from the client layer to pull information from the View dictionary
27 * and manage the View instance through its lifecycle
28 *
29 * @author Kuali Rice Team (rice.collab@kuali.org)
30 */
31 public interface ViewService {
32
33 /**
34 * Returns the <code>View</code> entry identified by the given id
35 *
36 * <p>
37 * The id matches the id configured for the View through the dictionary. A new view instance
38 * is returned that is in the created state
39 * </p>
40 *
41 * @param viewId - unique id for view configured on its definition
42 * @return View instance associated with the id or Null if id is not found
43 */
44 public View getViewById(String viewId);
45
46 /**
47 * Retrieves the <code>View</code> instance that is of the given view type and matches the
48 * given parameters (that are applicable for that type). If more than one views exists for the
49 * type and parameters, the view type may choose a default or throw an exception
50 *
51 * <p>
52 * If a view if found for the type parameters, a new instance is returned that is in the
53 * created state
54 * </p>
55 *
56 * @param viewType - name that identifies the view type
57 * @param parameters - Map of parameter key/value pairs that are used to select the
58 * view, the parameters allowed depend on the view type
59 * @return View instance or Null if a matching view was not found
60 */
61 public View getViewByType(ViewType viewType, Map<String, String> parameters);
62
63 /**
64 * Executes the view lifecycle on the given <code>View</code> instance which will
65 * prepare it for rendering
66 *
67 * <p>
68 * Any configuration sent through the options Map is used to initialize the
69 * View. This map contains present options the view is aware of and will
70 * typically come from request parameters. e.g. For maintenance Views there
71 * is the maintenance type option (new, edit, copy)
72 * </p>
73 *
74 * <p>
75 * After view retrieval, applies updates to the view based on the model data which
76 * Performs dynamic generation of fields (such as collection rows),
77 * conditional logic, and state updating (conditional hidden, read-only,
78 * required).
79 * </p>
80 *
81 * @param view - view instance that should be built
82 * @param model - object instance containing the view data
83 * @param parameters - Map of key values pairs that provide configuration for the
84 * <code>View</code>, this is generally comes from the request
85 * and can be the request parameter Map itself. Any parameters
86 * not valid for the View will be filtered out
87 */
88 public void buildView(View view, Object model, Map<String, String> parameters);
89
90 // TODO: remove once can get beans by type
91 public ViewTypeService getViewTypeService(UifConstants.ViewType viewType);
92
93 }