private static String toJsonFromAttributeDef( AtlasAttributeDef attributeDef, AtlasStructType structType) { boolean isForeignKey = structType.isForeignKeyAttribute(attributeDef.getName()); boolean isMappedFromRef = structType.isMappedFromRefAttribute(attributeDef.getName()); String reverseAttribName = null; if (isForeignKey) { // check if the referenced entity has foreignKeyRef to this attribute AtlasType attribType = structType.getAttributeType(attributeDef.getName()); if (attribType.getTypeCategory() == AtlasType.TypeCategory.ARRAY) { attribType = ((AtlasArrayType) attribType).getElementType(); } if (attribType.getTypeCategory() == AtlasType.TypeCategory.ENTITY) { reverseAttribName = ((AtlasStructType) attribType) .getMappedFromRefAttribute(structType.getTypeName(), attributeDef.getName()); } } boolean isComposite = isMappedFromRef || (isForeignKey && StringUtils.isBlank(reverseAttribName)); Map<String, Object> attribInfo = new HashMap<>(); attribInfo.put("name", attributeDef.getName()); attribInfo.put("dataType", attributeDef.getTypeName()); attribInfo.put("isUnique", attributeDef.isUnique()); attribInfo.put("isIndexable", attributeDef.isIndexable()); attribInfo.put("isComposite", isComposite); attribInfo.put("reverseAttributeName", reverseAttribName); Map<String, Object> multiplicity = new HashMap<>(); multiplicity.put("lower", attributeDef.getValuesMinCount()); multiplicity.put("upper", attributeDef.getValuesMaxCount()); multiplicity.put( "isUnique", AtlasAttributeDef.Cardinality.SET.equals(attributeDef.getCardinality())); attribInfo.put("multiplicity", AtlasType.toJson(multiplicity)); return AtlasType.toJson(attribInfo); }