1 /*
2 * Copyright (c) 2011-2024 PrimeFaces Extensions
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 * THE SOFTWARE.
21 */
22 package org.primefaces.extensions.component.parameters;
23
24 import javax.el.ValueExpression;
25 import javax.faces.view.facelets.ComponentConfig;
26 import javax.faces.view.facelets.ComponentHandler;
27 import javax.faces.view.facelets.FaceletContext;
28 import javax.faces.view.facelets.MetaRule;
29 import javax.faces.view.facelets.MetaRuleset;
30 import javax.faces.view.facelets.Metadata;
31 import javax.faces.view.facelets.MetadataTarget;
32 import javax.faces.view.facelets.TagAttribute;
33
34 /**
35 * {@link ComponentHandler} for the {@link AssignableParameter} component.
36 *
37 * @author Thomas Andraschko / last modified by $Author$
38 * @version $Revision$
39 * @since 0.5
40 */
41 public class AssignableParameterHandler extends ComponentHandler {
42
43 private static final AssignToMetaRule META_RULE = new AssignToMetaRule();
44
45 /**
46 * {@link MetaRule} for the <code>assignTo</code> of the {@link AssignableParameter}.
47 *
48 * @author Thomas Andraschko / last modified by $Author$
49 * @version $Revision$
50 */
51 private static final class AssignToMetaRule extends MetaRule {
52
53 @Override
54 public Metadata applyRule(final String name, final TagAttribute attribute, final MetadataTarget meta) {
55 if (meta.isTargetInstanceOf(AssignableParameter.class) && AssignableParameter.PropertyKeys.assignTo.toString().equals(name)) {
56 return new AssignToValueExpressionMetadata(attribute);
57 }
58
59 return null;
60 }
61 }
62
63 /**
64 * {@link Metadata} for the <code>assignTo</code> of the {@link AssignableParameter}.
65 *
66 * @author Thomas Andraschko / last modified by $Author$
67 * @version $Revision$
68 */
69 private static final class AssignToValueExpressionMetadata extends Metadata {
70
71 private final TagAttribute attribute;
72
73 public AssignToValueExpressionMetadata(final TagAttribute attribute) {
74 this.attribute = attribute;
75 }
76
77 @Override
78 public void applyMetadata(final FaceletContext context, final Object instance) {
79 final AssignableParameter param = (AssignableParameter) instance;
80 final ValueExpression valueExpression = attribute.getValueExpression(context, Object.class);
81
82 param.setAssignTo(valueExpression);
83 }
84 }
85
86 public AssignableParameterHandler(final ComponentConfig config) {
87 super(config);
88 }
89
90 @Override
91 protected MetaRuleset createMetaRuleset(final Class type) {
92 final MetaRuleset metaRuleset = super.createMetaRuleset(type);
93 metaRuleset.addRule(META_RULE);
94
95 return metaRuleset;
96 }
97 }