Initial work to support core data types in Data Prepper (#4496)

Adds an enum to represent core data types in Data Prepper. This is initially created to help connect the convert_entry_type processor with upcoming work for evaluating type information as part of #4478.

Signed-off-by: David Venable <dlv@amazon.com>

data-prepper-api/src/main/java/org/opensearch/dataprepper/model/event/DataType.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.dataprepper.model.event;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+
+import java.util.Arrays;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+/**
+ * Represents data types that are core to Data Prepper.
+ *
+ * @since 2.8
+ */
+public enum DataType {
+    /**
+     * Type of <i>string</i>. Compatible with {@link java.lang.String}.
+     *
+     * @since 2.8
+     */
+    STRING("string"),
+    /**
+     * Type of <i>boolean</i>. Compatible with the Java <b>boolean</b> primitive data type.
+     *
+     * @since 2.8
+     */
+    BOOLEAN("boolean"),
+    /**
+     * Type of <i>integer</i>. A 32-bit signed integer. Compatible with the Java <b>int</b> primitive data type.
+     *
+     * @since 2.8
+     */
+    INTEGER("integer"),
+    /**
+     * Type of <i>long</i>. A 64-bit signed integer. Compatible with the Java <b>long</b> primitive data type.
+     *
+     * @since 2.8
+     */
+    LONG("long"),
+    /**
+     * Type of <i>double</i>. A 64-bit IEEE 754 floating point number. Compatible with the Java <b>double</b> primitive data type.
+     *
+     * @since 2.8
+     */
+    DOUBLE("double");
+
+    private static final Map<String, DataType> TYPES_MAP = Arrays.stream(DataType.values())
+            .collect(Collectors.toMap(
+                    value -> value.typeName,
+                    value -> value
+            ));
+
+    private final String typeName;
+
+    DataType(final String typeName) {
+        this.typeName = typeName;
+    }
+
+    /**
+     * Gets the name of the type. This is the name that users of
+     * Data Prepper use or see.
+     *
+     * @return The name of the type.
+     * @since 2.8
+     */
+    public String getTypeName() {
+        return typeName;
+    }
+
+    @JsonCreator
+    static DataType fromTypeName(final String option) {
+        return TYPES_MAP.get(option);
+    }
+}

data-prepper-api/src/test/java/org/opensearch/dataprepper/model/event/DataTypeTest.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.dataprepper.model.event;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.EnumSource;
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+class DataTypeTest {
+    @ParameterizedTest
+    @EnumSource(DataType.class)
+    void fromTypeName_returns_expected_value(final DataType dataType) {
+        assertThat(DataType.fromTypeName(dataType.getTypeName()), equalTo(dataType));
+    }
+}

data-prepper-plugins/dissect-processor/src/main/java/org/opensearch/dataprepper/plugins/processor/dissect/DissectProcessor.java

@@ -91,7 +91,7 @@ private Object convertTargetType(String fieldKey, String fieldValue){
         }
         try{
             if(targetTypeMap.containsKey(fieldKey)){
-                TypeConverter converter = targetTypeMap.get(fieldKey).getTargetConverter();
+                final TypeConverter<?> converter = targetTypeMap.get(fieldKey).getTargetConverter();
                 return converter.convert(fieldValue);
             } else {
                 return fieldValue;

data-prepper-plugins/mutate-event-processors/src/main/java/org/opensearch/dataprepper/plugins/processor/mutateevent/ConvertEntryTypeProcessor.java

@@ -28,7 +28,7 @@
 public class ConvertEntryTypeProcessor  extends AbstractProcessor<Record<Event>, Record<Event>> {
     private static final Logger LOG = LoggerFactory.getLogger(ConvertEntryTypeProcessor.class);
     private final List<String> convertEntryKeys;
-    private final TypeConverter converter;
+    private final TypeConverter<?> converter;
     private final String convertWhen;
     private final List<String> nullValues;
     private final String type;

data-prepper-plugins/mutate-event-processors/src/main/java/org/opensearch/dataprepper/plugins/processor/mutateevent/TargetType.java

@@ -6,6 +6,7 @@
 package org.opensearch.dataprepper.plugins.processor.mutateevent;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
+import org.opensearch.dataprepper.model.event.DataType;
 import org.opensearch.dataprepper.typeconverter.TypeConverter;
 import org.opensearch.dataprepper.typeconverter.IntegerConverter;
 import org.opensearch.dataprepper.typeconverter.StringConverter;
@@ -18,30 +19,34 @@
 import java.util.stream.Collectors;
 
 public enum TargetType {
-    INTEGER("integer", new IntegerConverter()),
-    STRING("string", new StringConverter()),
-    DOUBLE("double", new DoubleConverter()),
-    BOOLEAN("boolean", new BooleanConverter()),
-    LONG("long", new LongConverter());
+    INTEGER(DataType.INTEGER, new IntegerConverter()),
+    STRING(DataType.STRING, new StringConverter()),
+    DOUBLE(DataType.DOUBLE, new DoubleConverter()),
+    BOOLEAN(DataType.BOOLEAN, new BooleanConverter()),
+    LONG(DataType.LONG, new LongConverter());
 
     private static final Map<String, TargetType> OPTIONS_MAP = Arrays.stream(TargetType.values())
             .collect(Collectors.toMap(
-                    value -> value.option,
+                    value -> value.dataType.getTypeName(),
                     value -> value
             ));
 
-    private final String option;
-    private final TypeConverter targetConverter;
+    private final DataType dataType;
+    private final TypeConverter<?> targetConverter;
 
-    TargetType(final String option, final TypeConverter target) {
-        this.option = option;
+    TargetType(final DataType dataType, final TypeConverter<?> target) {
+        this.dataType = dataType;
         this.targetConverter = target;
     }
 
-    public TypeConverter getTargetConverter() {
+    public TypeConverter<?> getTargetConverter() {
         return targetConverter;
     }
-
+
+    DataType getDataType() {
+        return dataType;
+    }
+
     @JsonCreator
     static TargetType fromOptionValue(final String option) {
         return OPTIONS_MAP.get(option.toLowerCase());

data-prepper-plugins/mutate-event-processors/src/test/java/org/opensearch/dataprepper/plugins/processor/mutateevent/TargetTypeTest.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.dataprepper.plugins.processor.mutateevent;
+
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.ArgumentsProvider;
+import org.junit.jupiter.params.provider.ArgumentsSource;
+import org.junit.jupiter.params.provider.EnumSource;
+import org.opensearch.dataprepper.model.event.DataType;
+
+import java.util.stream.Stream;
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.jupiter.params.provider.Arguments.arguments;
+
+class TargetTypeTest {
+    @ParameterizedTest
+    @EnumSource(TargetType.class)
+    void fromTypeName_returns_expected_value(final TargetType targetType) {
+        assertThat(TargetType.fromOptionValue(targetType.getDataType().getTypeName()), equalTo(targetType));
+    }
+    @ParameterizedTest
+    @ArgumentsSource(DataTypeToTargetTypeArgumentsProvider.class)
+    void fromTypeName_returns_expected_value_based_on_DataType(final String typeName, final TargetType targetType) {
+        assertThat(TargetType.fromOptionValue(typeName), equalTo(targetType));
+    }
+
+    static class DataTypeToTargetTypeArgumentsProvider implements ArgumentsProvider {
+        @Override
+        public Stream<? extends Arguments> provideArguments(final ExtensionContext extensionContext) {
+            return Stream.of(
+                    arguments(DataType.STRING.getTypeName(), TargetType.STRING),
+                    arguments(DataType.BOOLEAN.getTypeName(), TargetType.BOOLEAN),
+                    arguments(DataType.INTEGER.getTypeName(), TargetType.INTEGER),
+                    arguments(DataType.LONG.getTypeName(), TargetType.LONG),
+                    arguments(DataType.DOUBLE.getTypeName(), TargetType.DOUBLE)
+            );
+        }
+    }
+}