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Java > Open Source Codes > org > apache > tapestry > services > impl > DefaultParserDelegate


1 // Copyright 2004, 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.tapestry.services.impl;
16
17 import org.apache.hivemind.Location;
18 import org.apache.tapestry.IComponent;
19 import org.apache.tapestry.INamespace;
20 import org.apache.tapestry.IRequestCycle;
21 import org.apache.tapestry.Tapestry;
22 import org.apache.tapestry.parse.ITemplateParserDelegate;
23 import org.apache.tapestry.resolver.ComponentSpecificationResolver;
24 import org.apache.tapestry.spec.IComponentSpecification;
25
26 /**
27  * Default implementation of {@link org.apache.tapestry.parse.ITemplateParserDelegate}.
28  *
29  * @author Howard Lewis Ship
30  * @since 4.0
31  */
32 public class DefaultParserDelegate implements ITemplateParserDelegate
33 {
34     private IComponent _component;
35
36     private ComponentSpecificationResolver _resolver;
37
38     private IRequestCycle _cycle;
39
40     private String JavaDoc _componentAttributeName;
41
42     public DefaultParserDelegate(IComponent component, String JavaDoc componentAttributeName,
43             IRequestCycle cycle, ComponentSpecificationResolver resolver)
44     {
45         _component = component;
46         _componentAttributeName = componentAttributeName;
47         _resolver = resolver;
48         _cycle = cycle;
49     }
50
51     public boolean getKnownComponent(String JavaDoc componentId)
52     {
53         return _component.getSpecification().getComponent(componentId) != null;
54     }
55
56     public boolean getAllowBody(String JavaDoc componentId, Location location)
57     {
58         IComponent embedded = _component.getComponent(componentId);
59
60         if (embedded == null)
61             throw Tapestry.createNoSuchComponentException(_component, componentId, location);
62
63         return embedded.getSpecification().getAllowBody();
64     }
65
66     public boolean getAllowBody(String JavaDoc libraryId, String JavaDoc type, Location location)
67     {
68         INamespace namespace = _component.getNamespace();
69
70         _resolver.resolve(_cycle, namespace, libraryId, type, location);
71
72         IComponentSpecification spec = _resolver.getSpecification();
73
74         return spec.getAllowBody();
75     }
76
77     public String JavaDoc getComponentAttributeName()
78     {
79         return _componentAttributeName;
80     }
81 }
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