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


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.typesystem.env.AnnotationProcessorEnvironment;
21 import org.apache.beehive.netui.compiler.typesystem.declaration.AnnotationInstance;
22 import org.apache.beehive.netui.compiler.typesystem.declaration.MemberDeclaration;
23 import org.apache.beehive.netui.compiler.typesystem.declaration.MethodDeclaration;
24 import org.apache.beehive.netui.compiler.typesystem.type.TypeInstance;
25 import org.apache.beehive.netui.compiler.typesystem.type.PrimitiveType;
26 import org.apache.beehive.netui.compiler.Diagnostics;
27 import org.apache.beehive.netui.compiler.RuntimeVersionChecker;
28 import org.apache.beehive.netui.compiler.FatalCompileTimeException;
29
30
31 public class ValidateRequiredGrammar
32         extends BaseValidationRuleGrammar
33 {
34     public ValidateRequiredGrammar( AnnotationProcessorEnvironment env, Diagnostics diags, RuntimeVersionChecker rvc )
35     {
36         super( env, diags, rvc );
37     }
38
39     protected boolean onBeginCheck( AnnotationInstance annotation, AnnotationInstance[] parentAnnotations,
40                                     MemberDeclaration classMember )
41             throws FatalCompileTimeException
42     {
43         //
44 // Add a warning when this annotation is on a getter method which returns a primitive type.
45 // In that case, it will never be null.
46 //
47 if ( classMember instanceof MethodDeclaration )
48         {
49             TypeInstance returnType = ( ( MethodDeclaration ) classMember ).getReturnType();
50             
51             if ( returnType instanceof PrimitiveType )
52             {
53                 addWarning( annotation, "warning.validate-required-on-primitive-type",
54                             ANNOTATION_INTERFACE_PREFIX + VALIDATE_REQUIRED_TAG_NAME );
55             }
56         }
57         
58         return super.onBeginCheck( annotation, parentAnnotations, classMember );
59     }
60 }
61
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