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Java > Open Source Codes > org > apache > beehive > netui > compiler > grammar > WritableFieldType


1 /*
2  * Copyright 2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0
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  * $Header:$
17  */
18 package org.apache.beehive.netui.compiler.grammar;
19
20 import org.apache.beehive.netui.compiler.AnnotationGrammar;
21 import org.apache.beehive.netui.compiler.CompilerUtils;
22 import org.apache.beehive.netui.compiler.JpfLanguageConstants;
23 import org.apache.beehive.netui.compiler.typesystem.declaration.AnnotationInstance;
24 import org.apache.beehive.netui.compiler.typesystem.declaration.AnnotationTypeElementDeclaration;
25 import org.apache.beehive.netui.compiler.typesystem.declaration.AnnotationValue;
26 import org.apache.beehive.netui.compiler.typesystem.declaration.MemberDeclaration;
27 import org.apache.beehive.netui.compiler.typesystem.declaration.MethodDeclaration;
28
29 public class WritableFieldType
30         extends MemberFieldType
31         implements JpfLanguageConstants
32 {
33     private String JavaDoc _attrName;
34     
35     
36     public WritableFieldType( String JavaDoc requiredSuperclassName, String JavaDoc attrName, String JavaDoc requiredRuntimeVersion,
37                               AnnotationGrammar parentGrammar )
38     {
39         super( requiredSuperclassName, requiredRuntimeVersion, parentGrammar );
40         _attrName = attrName;
41     }
42
43     
44     public Object JavaDoc onCheck( AnnotationTypeElementDeclaration valueDecl, AnnotationValue value,
45                            AnnotationInstance[] parentAnnotations, MemberDeclaration classMember,
46                            int annotationArrayIndex )
47     {
48         //
49 // Look for the "readOnly" attribute on the current action method or the current class. If it's there,
50 // then this attribute cannot refer to the given field.
51 //
52 Boolean JavaDoc readonlyValue = null;
53         
54         if ( classMember instanceof MethodDeclaration )
55         {
56             readonlyValue = CompilerUtils.getBooleanValue( classMember, ACTION_TAG_NAME, READONLY_ATTR, true );
57         }
58         
59         if ( readonlyValue == null )
60         {
61             BaseFlowControllerGrammar fcGrammar = ( BaseFlowControllerGrammar ) getParentGrammar();
62             readonlyValue = Boolean.valueOf( fcGrammar.getFlowControllerInfo().getMergedControllerAnnotation().isReadOnly() );
63         }
64         
65         if ( readonlyValue != null && readonlyValue.booleanValue() )
66         {
67             addError( value, "error.readonly-writable-field-value", _attrName );
68         }
69         
70         return super.onCheck( valueDecl, value, parentAnnotations, classMember, annotationArrayIndex );
71     }
72 }
73
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