common/src/main/java/org/openecomp/mso/openpojo/rules/EqualsAndHashCodeTester.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP - SO
   4  * ================================================================================
   5  * Copyright (C) 2018 AT&T Intellectual Property. All rights reserved.
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20
  21 package org.openecomp.mso.openpojo.rules;
  22
  23 import static org.hamcrest.CoreMatchers.anyOf;
  24 import static org.hamcrest.CoreMatchers.anything;
  25
  26 import java.lang.reflect.Method;
  27 import java.util.ArrayList;
  28 import java.util.HashSet;
  29 import java.util.List;
  30 import java.util.Set;
  31
  32 import javax.persistence.Id;
  33
  34 import org.hamcrest.Matcher;
  35
  36 import com.openpojo.business.annotation.BusinessKey;
  37 import com.openpojo.random.RandomFactory;
  38 import com.openpojo.reflection.PojoClass;
  39 import com.openpojo.reflection.PojoField;
  40 import com.openpojo.validation.affirm.Affirm;
  41 import com.openpojo.validation.test.Tester;
  42 import com.openpojo.validation.utils.ValidationHelper;
  43
  44 public class EqualsAndHashCodeTester implements Tester {
  45
  46
  47         private final Matcher m;
  48         private boolean onlyDeclaredMethods = false;
  49         public EqualsAndHashCodeTester() {
  50                 m = anything();
  51         }
  52
  53         public EqualsAndHashCodeTester(Matcher m) {
  54                 this.m = m;
  55         }
  56
  57         public EqualsAndHashCodeTester onlyDeclaredMethods() {
  58                 this.onlyDeclaredMethods = true;
  59                 return this;
  60         }
  61         @Override
  62         public void run(PojoClass pojoClass) {
  63                 Class<?> clazz = pojoClass.getClazz();
  64                 if (anyOf(m).matches(clazz)) {
  65                         final Object classInstanceOne = ValidationHelper.getBasicInstance(pojoClass);
  66                         final Object classInstanceTwo = ValidationHelper.getBasicInstance(pojoClass);
  67                         if (onlyDeclaredMethods) {
  68                                 Method[] methods = classInstanceOne.getClass().getDeclaredMethods();
  69                                 boolean hasEquals = false;
  70                                 boolean hasHashcode = false;
  71                                 for (Method method : methods) {
  72                                         if (method.getName().equals("equals")) {
  73                                                 hasEquals = true;
  74                                         } else if (method.getName().equals("hashCode")) {
  75                                                 hasHashcode = true;
  76                                         }
  77                                 }
  78
  79                                 if (!(hasEquals && hasHashcode)) {
  80                                         return;
  81                                 }
  82                         }
  83                         Set<PojoField> identityFields = hasIdOrBusinessKey(pojoClass);
  84                         List<PojoField> otherFields = new ArrayList<>(pojoClass.getPojoFields());
  85                         otherFields.removeAll(identityFields);
  86
  87                         for (PojoField field : identityFields) {
  88                                 final Object value  = RandomFactory.getRandomValue(field);
  89
  90                                 field.invokeSetter(classInstanceOne, value);
  91                                 field.invokeSetter(classInstanceTwo, value);
  92                         }
  93
  94                         for (PojoField field : otherFields) {
  95                                 if (field.hasSetter()) {
  96                                         final Object valueOne  = RandomFactory.getRandomValue(field);
  97                                         final Object valueTwo  = RandomFactory.getRandomValue(field);
  98
  99                                         field.invokeSetter(classInstanceOne, valueOne);
 100                                         field.invokeSetter(classInstanceTwo, valueTwo);
 101                                 }
 102                         }
 103
 104                         Affirm.affirmTrue("Equals test failed for [" + classInstanceOne.getClass().getName() + "]", classInstanceOne.equals(classInstanceTwo));
 105
 106                         Affirm.affirmTrue("Equals test failed for [" + classInstanceOne.getClass().getName() + "]", classInstanceOne.equals(
 107                                         classInstanceOne));
 108
 109                         Affirm.affirmTrue("HashCode test failed for [" + classInstanceOne.getClass().getName() + "]", classInstanceOne.hashCode() == classInstanceTwo.hashCode());
 110
 111                         Affirm.affirmFalse("Expected false for comparison of two unlike objects", classInstanceOne.equals("test"));
 112                 }
 113         }
 114
 115
 116         private Set<PojoField> hasIdOrBusinessKey(PojoClass pojoClass) {
 117                 final Set<PojoField> fields = new HashSet<>();
 118
 119                 fields.addAll(pojoClass.getPojoFieldsAnnotatedWith(BusinessKey.class));
 120                 fields.addAll(pojoClass.getPojoFieldsAnnotatedWith(Id.class));
 121
 122                 return fields;
 123
 124         }
 125
 126 }