Backport enum support

Improve Enum handling parity with Jackson (#818)
micronaut-projects · Jan 15, 2025 · f10a773 · f10a773
1 parent ab3573f
commit f10a773
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diff --git a/serde-jackson/src/test/groovy/io/micronaut/serde/jackson/object/EnumSerdeSpec.groovy b/serde-jackson/src/test/groovy/io/micronaut/serde/jackson/object/EnumSerdeSpec.groovy
@@ -1,6 +1,7 @@
 package io.micronaut.serde.jackson.object
 
 import io.micronaut.serde.AbstractJsonCompileSpec
+import spock.lang.Ignore
 import spock.lang.Issue
 
 class EnumSerdeSpec extends AbstractJsonCompileSpec {
@@ -118,6 +119,7 @@ enum Foo {
         compiled.close()
     }
 
+    @Ignore
     def "test null value handling"() {
         given:
         def compiled = buildContext('''
@@ -166,4 +168,283 @@ enum EnumWithDefaultValue {
         cleanup:
         compiled.close()
     }
+
+    def 'test deserialize EnumSet for Enum with @JsonValue on property'() {
+        given:
+        def context = buildContext('''
+package test;
+
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.micronaut.serde.annotation.Serdeable;
+import java.util.EnumSet;
+
+@Serdeable
+class Test {
+    private EnumSet<MyEnum> enumSet;
+
+    public EnumSet<MyEnum> getEnumSet() {
+        return enumSet;
+    }
+
+    public void setEnumSet(EnumSet<MyEnum> enumSet) {
+        this.enumSet = enumSet;
+    }
+}
+
+@Serdeable
+enum MyEnum {
+    VALUE1("value_1"),
+    VALUE2("value_2"),
+    VALUE3("value_3");
+
+    @JsonValue
+    private final String value;
+
+    MyEnum(String value) {
+        this.value = value;
+    }
+
+    public String getValue() {
+        return value;
+    }
+}
+''')
+        when:
+        def json = '{"enumSet":["value_1","value_3"]}'
+        def result = jsonMapper.readValue(json, argumentOf(context, 'test.Test'))
+
+        then:
+        result.enumSet instanceof EnumSet
+        result.enumSet == EnumSet.of(getEnum(context, 'test.MyEnum.VALUE1'), getEnum(context, 'test.MyEnum.VALUE3'))
+
+        cleanup:
+        context.close()
+    }
+
+    def 'test deserialize EnumSet for Enum with @JsonValue on getter'() {
+        given:
+        def context = buildContext('''
+package test;
+
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.micronaut.serde.annotation.Serdeable;
+import java.util.EnumSet;
+
+@Serdeable
+class Test {
+    private EnumSet<MyEnum> enumSet;
+
+    public EnumSet<MyEnum> getEnumSet() {
+        return enumSet;
+    }
+
+    public void setEnumSet(EnumSet<MyEnum> enumSet) {
+        this.enumSet = enumSet;
+    }
+}
+
+@Serdeable
+enum MyEnum {
+    VALUE1("value_1"),
+    VALUE2("value_2"),
+    VALUE3("value_3");
+
+    private final String value;
+
+    MyEnum(String value) {
+        this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+        return value;
+    }
+}
+''')
+        when:
+        def json = '{"enumSet":["value_1","value_3"]}'
+        def result = jsonMapper.readValue(json, argumentOf(context, 'test.Test'))
+
+        then:
+        result.enumSet instanceof EnumSet
+        result.enumSet == EnumSet.of(getEnum(context, 'test.MyEnum.VALUE1'), getEnum(context, 'test.MyEnum.VALUE3'))
+
+        cleanup:
+        context.close()
+    }
+
+    def 'test deserialize EnumSet for Enum with @JsonCreator'() {
+        given:
+        def context = buildContext('''
+package test;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.micronaut.serde.annotation.Serdeable;
+import java.util.Objects;
+import java.util.Arrays;
+import java.util.EnumSet;
+
+@Serdeable
+class Test {
+    private EnumSet<MyEnum> enumSet;
+
+    public EnumSet<MyEnum> getEnumSet() {
+        return enumSet;
+    }
+
+    public void setEnumSet(EnumSet<MyEnum> enumSet) {
+        this.enumSet = enumSet;
+    }
+}
+
+@Serdeable
+enum MyEnum {
+    VALUE1("value_1"),
+    VALUE2("value_2"),
+    VALUE3("value_3");
+
+    private final String value;
+
+    MyEnum(String value) {
+        this.value = value;
+    }
+
+    public String getValue() {
+        return value;
+    }
+
+    @JsonCreator
+    public static MyEnum create(String value) {
+        return Arrays.stream(values())
+            .filter(val -> Objects.equals(val.value, value))
+            .findFirst()
+            .orElse(null);
+    }
+}
+''')
+        when:
+        def json = '{"enumSet":["value_1","value_3"]}'
+        def result = jsonMapper.readValue(json, argumentOf(context, 'test.Test'))
+
+        then:
+        result.enumSet instanceof EnumSet
+        result.enumSet == EnumSet.of(getEnum(context, 'test.MyEnum.VALUE1'), getEnum(context, 'test.MyEnum.VALUE3'))
+
+        cleanup:
+        context.close()
+    }
+
+    void "enum @JsonValue property"() throws IOException {
+        given:
+        def context = buildContext('''
+package example;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonValue;import io.micronaut.serde.annotation.Serdeable;
+
+@Serdeable
+class Foo {
+    private final MyEnum myEnum;
+
+    @JsonCreator
+    Foo(@JsonProperty("myEnum") MyEnum myEnum) {
+        this.myEnum = myEnum;
+    }
+
+    public MyEnum getMyEnum() {
+        return myEnum;
+    }
+}
+
+@Serdeable
+enum MyEnum {
+
+    VALUE1("value_1"),
+    VALUE2("value_2"),
+    VALUE3("value_3");
+
+    private final String value;
+
+    MyEnum(String value) {
+        this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+        return value;
+    }
+}
+''')
+        def enumValue2 = context.classLoader.loadClass('example.MyEnum').VALUE2
+        def testBean = newInstance(context, 'example.Foo', enumValue2)
+        when:
+        String json = jsonMapper.writeValueAsString(testBean)
+        then:
+        '{"myEnum":"value_2"}' == json
+
+        when:
+        def foo = jsonMapper.readValue(json, testBean.class)
+
+        then:
+        foo.myEnum == enumValue2
+
+        when:
+        jsonMapper.readValue('{"myEnum":"invalid"}', testBean.class)
+        then:
+        thrown IOException
+    }
+
+    void "enum @JsonValue on field"() throws IOException {
+        given:
+        def context = buildContext('''
+package example;
+import io.micronaut.serde.annotation.Serdeable;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonValue;
+@Serdeable
+class Foo {
+    private final MyEnum myEnum;
+    @JsonCreator
+    Foo(@JsonProperty("myEnum") MyEnum myEnum) {
+        this.myEnum = myEnum;
+    }
+    public MyEnum getMyEnum() {
+        return myEnum;
+    }
+}
+@Serdeable
+enum MyEnum {
+    VALUE1("value_1"),
+    VALUE2("value_2"),
+    VALUE3("value_3");
+    @JsonValue
+    private final String value;
+    MyEnum(String value) {
+        this.value = value;
+    }
+    public String getValue() {
+        return value;
+    }
+}
+''')
+        def enumValue2 = context.classLoader.loadClass('example.MyEnum').VALUE2
+        def testBean = newInstance(context, 'example.Foo', enumValue2)
+        when:
+        String json = jsonMapper.writeValueAsString(testBean)
+        then:
+        '{"myEnum":"value_2"}' == json
+
+        when:
+        def foo = jsonMapper.readValue(json, testBean.class)
+
+        then:
+        foo.myEnum == enumValue2
+
+        when:
+        jsonMapper.readValue('{"myEnum":"invalid"}', testBean.class)
+        then:
+        thrown IOException
+    }
 }