DATAES-639 - Add ignore_above mapping parameter support.

Original pull request: #304.

src/main/java/org/springframework/data/elasticsearch/annotations/Field.java

@@ -32,6 +32,7 @@ import java.lang.annotation.Target;
  * @author Jakub Vavrik
  * @author Kevin Leturc
  * @author Peter-Josef Meisch
+ * @author Xiao Yu
  */
 @Retention(RetentionPolicy.RUNTIME)
 @Target(ElementType.FIELD)
@@ -77,4 +78,9 @@ public @interface Field {
 	boolean includeInParent() default false;
 
 	String[] copyTo() default {};
+
+	/**
+	 * @since 4.0
+	 */
+	int ignoreAbove() default -1;
 }

src/main/java/org/springframework/data/elasticsearch/annotations/InnerField.java

@@ -24,6 +24,7 @@ import java.lang.annotation.Target;
  * @author Artur Konczak
  * @author Mohsin Husen
  * @author Sascha Woo
+ * @author Xiao Yu
  */
 @Retention(RetentionPolicy.RUNTIME)
 @Target(ElementType.FIELD)
@@ -48,4 +49,9 @@ public @interface InnerField {
 	String analyzer() default "";
 
 	String normalizer() default "";
+
+	/**
+	 * @since 4.0
+	 */
+	int ignoreAbove() default -1;
 }

src/main/java/org/springframework/data/elasticsearch/core/MappingBuilder.java

@@ -48,6 +48,7 @@ import org.springframework.data.elasticsearch.core.mapping.ElasticsearchPersiste
 import org.springframework.data.mapping.PropertyHandler;
 import org.springframework.data.util.TypeInformation;
 import org.springframework.lang.Nullable;
+import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
 
 import com.fasterxml.jackson.databind.JsonNode;
@@ -67,6 +68,7 @@ import com.fasterxml.jackson.databind.ObjectMapper;
  * @author Robert Gruendler
  * @author Petr Kukral
  * @author Peter-Josef Meisch
+ * @author Xiao Yu
  */
 class MappingBuilder {
 
@@ -85,6 +87,7 @@ class MappingBuilder {
 	private static final String FIELD_CONTEXT_TYPE = "type";
 	private static final String FIELD_CONTEXT_PRECISION = "precision";
 	private static final String FIELD_DYNAMIC_TEMPLATES = "dynamic_templates";
+	private static final String FIELD_IGNORE_ABOVE = "ignore_above";
 
 	private static final String COMPLETION_PRESERVE_SEPARATORS = "preserve_separators";
 	private static final String COMPLETION_PRESERVE_POSITION_INCREMENTS = "preserve_position_increments";
@@ -346,6 +349,7 @@ class MappingBuilder {
 		String searchAnalyzer = null;
 		String normalizer = null;
 		String[] copyTo = null;
+		Integer ignoreAbove = null;
 
 		if (annotation instanceof Field) {
 			// @Field
@@ -360,6 +364,7 @@ class MappingBuilder {
 			searchAnalyzer = fieldAnnotation.searchAnalyzer();
 			normalizer = fieldAnnotation.normalizer();
 			copyTo = fieldAnnotation.copyTo();
+			ignoreAbove = fieldAnnotation.ignoreAbove();
 		} else if (annotation instanceof InnerField) {
 			// @InnerField
 			InnerField fieldAnnotation = (InnerField) annotation;
@@ -372,6 +377,7 @@ class MappingBuilder {
 			analyzer = fieldAnnotation.analyzer();
 			searchAnalyzer = fieldAnnotation.searchAnalyzer();
 			normalizer = fieldAnnotation.normalizer();
+			ignoreAbove = fieldAnnotation.ignoreAbove();
 		} else {
 			throw new IllegalArgumentException("annotation must be an instance of @Field or @InnerField");
 		}
@@ -404,6 +410,10 @@ class MappingBuilder {
 		if (copyTo != null && copyTo.length > 0) {
 			builder.field(FIELD_COPY_TO, copyTo);
 		}
+		if (ignoreAbove != -1) {
+			Assert.isTrue(ignoreAbove >= 0, "ignore_above must be a positive value");
+			builder.field(FIELD_IGNORE_ABOVE, ignoreAbove);
+		}
 	}
 
 	/**

src/test/java/org/springframework/data/elasticsearch/core/MappingBuilderTests.java

@@ -80,6 +80,7 @@ import org.springframework.test.context.junit4.SpringRunner;
  * @author Don Wellington
  * @author Sascha Woo
  * @author Peter-Josef Meisch
+ * @author Xiao Yu
  */
 @RunWith(SpringRunner.class)
 @ContextConfiguration("classpath:elasticsearch-template-test.xml")
@@ -409,6 +410,35 @@ public class MappingBuilderTests extends MappingContextBaseTests {
 		assertEquals(expected, mapping, false);
 	}
 
+	@Test // DATAES-639
+	public void shouldUseIgnoreAbove() throws IOException, JSONException {
+
+		// given
+		String expected = "{\"ignore-above-type\":{\"properties\":{\"message\":{\"store\":false,\"type\":\"keyword\",\"ignore_above\":10}}}}";
+
+		// when
+		String mapping = getMappingBuilder().buildPropertyMapping(IgnoreAboveEntity.class);
+
+		// then
+		assertEquals(expected, mapping, false);
+	}
+
+	/**
+	 * @author Xiao Yu
+	 */
+	@Setter
+	@Getter
+	@NoArgsConstructor
+	@AllArgsConstructor
+	@Builder
+	@Document(indexName = "ignore-above-index", type = "ignore-above-type")
+	static class IgnoreAboveEntity {
+
+		@Id private String id;
+
+		@Field(type = FieldType.Keyword, ignoreAbove = 10) private String message;
+	}
+
 	/**
 	 * @author Peter-Josef Meisch
 	 */