io.zenwave360.generator.generators.JDLEntitiesToAvroConverter Maven / Gradle / Ivy

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package io.zenwave360.generator.generators;

import java.util.*;

import io.zenwave360.generator.utils.JSONPath;
import io.zenwave360.generator.utils.Lists;
import io.zenwave360.generator.utils.Maps;

public class JDLEntitiesToAvroConverter {

    public String idType = "string";
    public String namespace = "com.example.please.update";

    public JDLEntitiesToAvroConverter withIdType(String idType) {
        this.idType = idType;
        return this;
    }

    public JDLEntitiesToAvroConverter withNamespace(String namespace) {
        this.namespace = namespace;
        return this;
    }

    private static final List blobTypes = List.of("Blob", "AnyBlob", "ImageBlob");

    public Map convertToAvro(Map entityOrEnum, Map jdlModel) {
        boolean isEnum = entityOrEnum.get("values") != null;
        return isEnum ? convertEnumToAvro(entityOrEnum) : convertEntityToAvro(entityOrEnum, jdlModel);
    }

    public Map convertEnumToAvro(Map enumValue) {
        Map schema = new LinkedHashMap<>();
        schema.put("type", "enum");
        schema.put("name", enumValue.get("name"));
        schema.put("namespace", namespace);
        if (enumValue.get("comment") != null) {
            schema.put("doc", enumValue.get("comment"));
        }
        List values = JSONPath.get(enumValue, "$.values..name");
        schema.put("symbols", values);
        return schema;
    }

    public Map convertEntityToAvro(Map entity, Map jdlModel) {
        Map schema = new LinkedHashMap<>();
        schema.put("type", "record");
        schema.put("name", entity.get("name"));
        schema.put("namespace", namespace);
        if (entity.get("comment") != null) {
            schema.put("doc", entity.get("comment"));
        }
        List> fields = new ArrayList<>();
        schema.put("fields", fields);

        if (!JSONPath.get(entity, "options.embedded", false)) {
            fields.add(Maps.of("name", "id", "type", idType));
        }

        List> entityFields = (List) JSONPath.get(entity, "$.fields[*]");
        String superClassName = JSONPath.get(entity, "$.options.extends");
        if (superClassName != null) {
            List superClassFields = (List) JSONPath.get(jdlModel, "$.entities['" + superClassName + "'].fields[*]");
            fields = Lists.concat(superClassFields, fields);
        }
        for (Map entityField : entityFields) {
            boolean isRequired = JSONPath.get(entityField, "$.validations.required.value") != null;
            Map field = new LinkedHashMap<>();
            field.put("name", entityField.get("name"));

            if ("String".equals(entityField.get("type")) || "TextBlob".equals(entityField.get("type"))) {
                field.put("type", typeList("string", isRequired));
            } else if ("Enum".equals(entityField.get("type"))) {
                field.put("type", typeList("string", isRequired));
            } else if ("LocalDate".equals(entityField.get("type"))) {
                field.put("type", typeList("string", isRequired));
                // field.put("format", "date");
            } else if ("ZonedDateTime".equals(entityField.get("type"))) {
                field.put("type", typeList("string", isRequired));
                // field.put("format", "date-time");
            } else if ("Instant".equals(entityField.get("type"))) {
                field.put("type", typeList("string", isRequired));
                // field.put("format", "date-time");
            } else if ("Duration".equals(entityField.get("type"))) {
                field.put("type", typeList("string", isRequired));
                // property.put("format", "date-time");
            } else if ("Integer".equals(entityField.get("type"))) {
                field.put("type", typeList("int", isRequired));
                // field.put("format", "int32");
            } else if ("Long".equals(entityField.get("type"))) {
                field.put("type", typeList("long", isRequired));
                // field.put("format", "int64");
            } else if ("Float".equals(entityField.get("type"))) {
                field.put("type", typeList("float", isRequired));
                // field.put("format", "float");
            } else if ("Double".equals(entityField.get("type")) || "BigDecimal".equals(entityField.get("type"))) {
                field.put("type", typeList("double", isRequired));
                // field.put("format", "double");
            } else if ("Boolean".equals(entityField.get("type"))) {
                field.put("type", typeList("boolean", isRequired));
            } else if ("UUID".equals(entityField.get("type"))) {
                field.put("type", typeList("string", isRequired));
                // field.put("pattern", "^[a-f\\d]{4}(?:[a-f\\d]{4}-){4}[a-f\\d]{12}$");
            } else if (blobTypes.contains(entityField.get("type"))) {
                field.put("type", typeList("bytes", isRequired));
                // field.put("format", "binary");
            } else {
                field.put("type", entityField.get("type")); // TODO consider embedding
            }

            // String minlength = JSONPath.get(entityField, "$.validations.minlength.value");
            // if(minlength != null) {
            // field.put("minLength", asNumber(minlength));
            // }
            // String maxlength = JSONPath.get(entityField, "$.validations.maxlength.value");
            // if(maxlength != null) {
            // field.put("maxLength", asNumber(maxlength));
            // }
            // String pattern = JSONPath.get(entityField, "$.validations.pattern.value");
            // if(pattern != null) {
            // field.put("pattern", pattern);
            // }
            if (entityField.get("comment") != null) {
                field.put("doc", entityField.get("comment"));
            }

            if (entityField.get("isArray") == Boolean.TRUE) {
                field = Maps.of("name", field.get("name"), "type", Maps.of("type", "array", "items", field.get("type"), "java-class", "java.util.List"));
            }

            fields.add(field);
        }

        List> relationships = JSONPath.get(entity, "$.relationships[*]", Collections.emptyList());
        if (superClassName != null) {
            List superClassRelationships = (List) JSONPath.get(jdlModel, "$.entities['" + superClassName + "'].relationships[*]");
            relationships = Lists.concat(superClassRelationships, relationships);
        }
        for (Map relationship : relationships) {
            if((relationship.get("fieldName") != null) && (boolean) relationship.getOrDefault("ownerSide", false)) {
                var isCollection = relationship.get("isCollection") == Boolean.TRUE;
                Map field = new LinkedHashMap<>();
                field.put("name", relationship.get("name"));
                if (relationship.get("comment") != null) {
                    field.put("doc", relationship.get("comment"));
                }
                field.put("type", relationship.get("otherEntityName"));
                if (isCollection) {
                    field = Maps.of("type", "array", "items", field);
                }
                fields.add(field);
            }
        }


        return schema;
    }

    private Object typeList(String type, boolean isRequired) {
        return isRequired ? type : Arrays.asList("null", type);
    }

    private static Object asNumber(String number) {
        try {
            return Integer.parseInt(number);
        } catch (NumberFormatException e) {
            return number;
        }
    }
}