com.talk2object.plum.repository.meta.EntityMetaBuilder Maven / Gradle / Ivy

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package com.talk2object.plum.repository.meta;

public class EntityMetaBuilder {
	private static final String DEFAULT_ID_FIELD_NAME = "id";
	private Class entityClass;

	public EntityMetaBuilder(Class entityClass) {
		this.entityClass = entityClass;
	}

	public Entity build() {
		// scan annotations

		Entity metaEntity = new Entity(entityClass);

		
		com.talk2object.plum.repository.meta.annotation.Entity annotationEntity = (com.talk2object.plum.repository.meta.annotation.Entity) entityClass
				.getAnnotation(com.talk2object.plum.repository.meta.annotation.Entity.class);
		String idFieldName = DEFAULT_ID_FIELD_NAME;
		if (annotationEntity != null) {
			idFieldName = annotationEntity.idFieldName();
		}
		metaEntity.setIdFieldName(idFieldName);

		try {
			java.lang.reflect.Field idField = entityClass
					.getDeclaredField(idFieldName);
			metaEntity.setIdFieldClass(idField.getType());
		} catch (Exception e) {
			throw new RuntimeException("get field error on class: "
					+ entityClass.getCanonicalName(), e);
		}

		for (java.lang.reflect.Field field : entityClass.getDeclaredFields()) {

			com.talk2object.plum.repository.meta.annotation.Field annotationfield = field
					.getAnnotation(com.talk2object.plum.repository.meta.annotation.Field.class);

			if (annotationfield != null && annotationfield.hidden()) {
				continue;
			}

			String name = null;
			Class type = null;

			if (annotationfield != null) {
				name = annotationfield.name();
				type = field.getType();
			} else {
				name = field.getName();
				type = field.getType();
			}

			Field metaField = new Field(name, type, field);
			metaEntity.addField(metaField);
		}

		return metaEntity;
	}
}