IdClassOverridesEqualsAndHashCode


1   /*
2    * The contents of this file are subject to the terms of the Common Development
3    * and Distribution License (the License). You may not use this file except in
4    * compliance with the License.
5    *
6    * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7    * or http://www.netbeans.org/cddl.txt.
8    *
9    * When distributing Covered Code, include this CDDL Header Notice in each file
10   * and include the License file at http://www.netbeans.org/cddl.txt.
11   * If applicable, add the following below the CDDL Header, with the fields
12   * enclosed by brackets [] replaced by your own identifying information:
13   * "Portions Copyrighted [year] [name of copyright owner]"
14   *
15   * The Original Software is NetBeans. The Initial Developer of the Original
16   * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
17   * Microsystems, Inc. All Rights Reserved.
18   */
19  
20  package org.netbeans.modules.j2ee.jpa.verification.rules.entity;
21  
22  import java.util.Collections  ;
23  import javax.lang.model.element.ExecutableElement;
24  import javax.lang.model.element.TypeElement;
25  import javax.lang.model.util.ElementFilter;
26  import org.netbeans.modules.j2ee.jpa.verification.JPAClassRule;
27  import org.netbeans.modules.j2ee.jpa.verification.JPAClassRule.ClassConstraints;
28  import org.netbeans.modules.j2ee.jpa.verification.common.ProblemContext;
29  import org.netbeans.spi.editor.hints.ErrorDescription;
30  import org.openide.util.NbBundle;
31  
32  /**
33   * @author Sanjeeb.Sahoo@Sun.COM
34   * @author Tomasz.Slota@Sun.COM
35   */
36  public class IdClassOverridesEqualsAndHashCode extends JPAClassRule {
37      /** Creates a new instance of IdClassOverridesEqualsMethod */
38      public IdClassOverridesEqualsAndHashCode() {
39          setClassContraints(Collections.singleton(ClassConstraints.IDCLASS));
40      }
41      
42      @Override   public ErrorDescription[] apply(TypeElement subject, ProblemContext ctx){
43          boolean hasEquals = false;
44          boolean hasHashCode = false;
45          
46          for (ExecutableElement method : ElementFilter.methodsIn(subject.getEnclosedElements())){
47              String   methodName = method.getSimpleName().toString();
48              
49              if ("equals".equals(methodName) //NOI18N
50                      && method.getParameters().size() == 1){
51                  
52                  if ("java.lang.Object".equals(method.getParameters().get(0).asType().toString())){ //NOI18N
53                      hasEquals = true;
54                  }
55              }
56              else{
57                  if ("hashCode".equals(methodName) && method.getParameters().size() == 0){ //NOI18N
58                      hasHashCode = true;
59                  }
60              }
61              
62              if (hasHashCode && hasEquals){
63                  return null;
64              }
65          }
66          
67          return new ErrorDescription[]{createProblem(subject, ctx)};
68      }
69      
70      @Override   public String   getDescription(){
71          return NbBundle.getMessage(IdDefinedInHierarchy.class, "MSG_IdClassDoesNotOverrideEquals");
72      }
73  }
74
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