| 1 | package com.github.dakusui.pcond.core.identifieable; | |
| 2 | ||
| 3 | import java.util.List; | |
| 4 | import java.util.Objects; | |
| 5 | import java.util.Optional; | |
| 6 | import java.util.stream.Stream; | |
| 7 | ||
| 8 | import static java.util.Collections.singletonList; | |
| 9 | import static java.util.stream.Collectors.toList; | |
| 10 | ||
| 11 | /** | |
| 12 | * An interface that represents an object which can be identified based on objects | |
| 13 | * used on instantiation without overriding the {@link Object#hashCode} and {@link Object#equals(Object)}. | |
| 14 | * In order to minimize effort to implement this interface, you can extend | |
| 15 | * {@link Identifiable.Base} class. | |
| 16 | */ | |
| 17 | public interface Identifiable { | |
| 18 | static Optional<Object> creatorOf(Object object) { | |
| 19 | Optional<Object> ret = Optional.empty(); | |
| 20 |
1
1. creatorOf : negated conditional → KILLED |
if (object instanceof Identifiable) |
| 21 | ret = Optional.of(((Identifiable) object).creator()); | |
| 22 |
1
1. creatorOf : replaced return value with Optional.empty for com/github/dakusui/pcond/core/identifieable/Identifiable::creatorOf → KILLED |
return ret; |
| 23 | } | |
| 24 | ||
| 25 | static List<Object> argsOf(Object object) { | |
| 26 | List<Object> ret = singletonList(object); | |
| 27 |
1
1. argsOf : negated conditional → KILLED |
if (object instanceof Identifiable) |
| 28 | ret = ((Identifiable) object).args(); | |
| 29 |
1
1. argsOf : replaced return value with Collections.emptyList for com/github/dakusui/pcond/core/identifieable/Identifiable::argsOf → KILLED |
return ret; |
| 30 | } | |
| 31 | ||
| 32 | static <T> String formatObjectName(Object object) { | |
| 33 |
2
1. formatObjectName : negated conditional → SURVIVED 2. formatObjectName : replaced return value with "" for com/github/dakusui/pcond/core/identifieable/Identifiable::formatObjectName → SURVIVED |
return "noname:" + (object == null ? "null" : object.toString()); |
| 34 | } | |
| 35 | ||
| 36 | Object creator(); | |
| 37 | ||
| 38 | /** | |
| 39 | * This method is designed to be called from the {@code hashCode()} method of a class | |
| 40 | * which implements {@link Identifiable} identity interface. | |
| 41 | * | |
| 42 | * @return A proper value to be returned from the {@link Object#hashCode()} method. | |
| 43 | */ | |
| 44 | default int defaultHashCode() { | |
| 45 |
1
1. defaultHashCode : replaced int return with 0 for com/github/dakusui/pcond/core/identifieable/Identifiable::defaultHashCode → KILLED |
return identityObject().hashCode(); |
| 46 | } | |
| 47 | ||
| 48 | /** | |
| 49 | * This method is designed to be called from the {@code defaultEquals()} method of a class | |
| 50 | * which implements {@link Identifiable} identity interface. | |
| 51 | * | |
| 52 | * @return A proper value to be returned from the {@link Object#equals(Object)} method. | |
| 53 | */ | |
| 54 | default boolean defaultEquals(Object anotherObject) { | |
| 55 |
1
1. defaultEquals : negated conditional → KILLED |
if (this == anotherObject) |
| 56 |
1
1. defaultEquals : replaced boolean return with false for com/github/dakusui/pcond/core/identifieable/Identifiable::defaultEquals → KILLED |
return true; |
| 57 |
1
1. defaultEquals : negated conditional → KILLED |
if (!this.getClass().isInstance(anotherObject)) |
| 58 |
1
1. defaultEquals : replaced boolean return with true for com/github/dakusui/pcond/core/identifieable/Identifiable::defaultEquals → KILLED |
return false; |
| 59 |
2
1. defaultEquals : replaced boolean return with false for com/github/dakusui/pcond/core/identifieable/Identifiable::defaultEquals → KILLED 2. defaultEquals : replaced boolean return with true for com/github/dakusui/pcond/core/identifieable/Identifiable::defaultEquals → KILLED |
return Objects.equals(this.identityObject(), ((Identifiable) anotherObject).identityObject()); |
| 60 | } | |
| 61 | ||
| 62 | default Object createIdentity() { | |
| 63 |
1
1. createIdentity : replaced return value with null for com/github/dakusui/pcond/core/identifieable/Identifiable::createIdentity → KILLED |
return Stream.concat( |
| 64 | Stream.of(creator()), | |
| 65 | args().stream()).collect(toList()); | |
| 66 | } | |
| 67 | ||
| 68 | /** | |
| 69 | * Typically, implementation of this method should return a final field value to which the | |
| 70 | * value returned by {@link Identifiable#createIdentity()} method is assigned in the constructor. | |
| 71 | * | |
| 72 | * @return The identity object. | |
| 73 | */ | |
| 74 | Object identityObject(); | |
| 75 | ||
| 76 | List<Object> args(); | |
| 77 | ||
| 78 | class Base implements Identifiable { | |
| 79 | private final Object creator; | |
| 80 | private final List<Object> args; | |
| 81 | private final Object identity; | |
| 82 | ||
| 83 | protected Base(Object creator, List<Object> args) { | |
| 84 | this.creator = Objects.requireNonNull(creator); | |
| 85 | this.args = Objects.requireNonNull(args); | |
| 86 | this.identity = createIdentity(); | |
| 87 | } | |
| 88 | ||
| 89 | @Override | |
| 90 | public Object identityObject() { | |
| 91 |
1
1. identityObject : replaced return value with null for com/github/dakusui/pcond/core/identifieable/Identifiable$Base::identityObject → KILLED |
return this.identity; |
| 92 | } | |
| 93 | ||
| 94 | @Override | |
| 95 | public Object creator() { | |
| 96 |
1
1. creator : replaced return value with null for com/github/dakusui/pcond/core/identifieable/Identifiable$Base::creator → KILLED |
return this.creator; |
| 97 | } | |
| 98 | ||
| 99 | @Override | |
| 100 | public List<Object> args() { | |
| 101 |
1
1. args : replaced return value with Collections.emptyList for com/github/dakusui/pcond/core/identifieable/Identifiable$Base::args → KILLED |
return args; |
| 102 | } | |
| 103 | ||
| 104 | @Override | |
| 105 | public int hashCode() { | |
| 106 |
1
1. hashCode : replaced int return with 0 for com/github/dakusui/pcond/core/identifieable/Identifiable$Base::hashCode → KILLED |
return defaultHashCode(); |
| 107 | } | |
| 108 | ||
| 109 | // Done in a method to which the operation is delegated. | |
| 110 | @SuppressWarnings("EqualsWhichDoesntCheckParameterClass") | |
| 111 | @Override | |
| 112 | public boolean equals(Object obj) { | |
| 113 |
2
1. equals : replaced boolean return with false for com/github/dakusui/pcond/core/identifieable/Identifiable$Base::equals → KILLED 2. equals : replaced boolean return with true for com/github/dakusui/pcond/core/identifieable/Identifiable$Base::equals → KILLED |
return defaultEquals(obj); |
| 114 | } | |
| 115 | } | |
| 116 | } | |
Mutations | ||
| 20 |
1.1 |
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| 22 |
1.1 |
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| 27 |
1.1 |
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| 29 |
1.1 |
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| 33 |
1.1 2.2 |
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| 45 |
1.1 |
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| 55 |
1.1 |
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| 56 |
1.1 |
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| 57 |
1.1 |
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| 58 |
1.1 |
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| 59 |
1.1 2.2 |
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| 63 |
1.1 |
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| 91 |
1.1 |
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| 96 |
1.1 |
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| 101 |
1.1 |
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| 106 |
1.1 |
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| 113 |
1.1 2.2 |