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Java > Open Source Codes > org > alfresco > repo > template > HasAspectMethod


1 /*
2  * Copyright (C) 2005 Alfresco, Inc.
3  *
4  * Licensed under the Mozilla Public License version 1.1
5  * with a permitted attribution clause. You may obtain a
6  * copy of the License at
7  *
8  * http://www.alfresco.org/legal/license.txt
9  *
10  * Unless required by applicable law or agreed to in writing,
11  * software distributed under the License is distributed on an
12  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13  * either express or implied. See the License for the specific
14  * language governing permissions and limitations under the
15  * License.
16  */
17 package org.alfresco.repo.template;
18
19 import java.util.ArrayList JavaDoc;
20 import java.util.List JavaDoc;
21
22 import org.alfresco.service.cmr.repository.TemplateNode;
23 import org.alfresco.service.namespace.QName;
24
25 import freemarker.ext.beans.BeanModel;
26 import freemarker.ext.beans.StringModel;
27 import freemarker.template.TemplateMethodModelEx;
28 import freemarker.template.TemplateModelException;
29 import freemarker.template.TemplateScalarModel;
30
31 /**
32  * @author Kevin Roast
33  *
34  * Custom FreeMarker Template language method.
35  * <p>
36  * Method returns whether a TemplateNode has a particular aspect applied to it. The aspect
37  * name can be either the fully qualified QName or the short prefixed name string.
38  * <p>
39  * Usage: hasAspect(TemplateNode node, String aspect)
40  */
41 public final class HasAspectMethod implements TemplateMethodModelEx
42 {
43     /**
44      * @see freemarker.template.TemplateMethodModel#exec(java.util.List)
45      */
46     public Object JavaDoc exec(List JavaDoc args) throws TemplateModelException
47     {
48         int result = 0;
49         
50         if (args.size() == 2)
51         {
52             // arg 0 must be a wrapped TemplateNode object
53 BeanModel arg0 = (BeanModel)args.get(0);
54             
55             // arg 1 can be either wrapped QName object or a String
56 String JavaDoc arg1String = null;
57             Object JavaDoc arg1 = args.get(1);
58             if (arg1 instanceof BeanModel)
59             {
60                 arg1String = ((BeanModel)arg1).getWrappedObject().toString();
61             }
62             else if (arg1 instanceof TemplateScalarModel)
63             {
64                 arg1String = ((TemplateScalarModel)arg1).getAsString();
65             }
66             if (arg0.getWrappedObject() instanceof TemplateNode)
67             {
68                 // test to see if this node has the aspect
69 if ( ((TemplateNode)arg0.getWrappedObject()).hasAspect(arg1String) )
70                 {
71                     result = 1;
72                 }
73             }
74         }
75         
76         return Integer.valueOf(result);
77     }
78 }
79
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