package foundation.data.object;

import foundation.dao.Filter;
import foundation.data.entity.Entity;
import foundation.data.meta.field.FieldsRuntime;
import foundation.server.config.DBaseType;
import foundation.translator.ITranslator;
import foundation.util.Util;


public class DefaultFilter {

	private String fieldName;
	private String fieldValue;
	private String filterValue;
	private boolean empty;
	
	
	public DefaultFilter() {

	}
	
	public void load(Entity entity) {
		fieldName = entity.getString("filter_field");
		fieldValue = entity.getString("filter_value");
		
		empty = Util.isEmpty(fieldName) || Util.isEmpty(fieldValue);
	}
	
	public void init(DataObject dataObject) throws Exception {
		if (empty) {
			return;
		}
		
		FieldsRuntime fields = dataObject.getTableFieldMetas();
		ITranslator translator = fields.getValueTranslator(fieldName);
		
		if (translator == null) {
			return;
		}
		
		DBaseType type = dataObject.getDbaseType();
		
		Filter filter = new Filter();
		Object value = translator.toSqlString(type, fieldValue);
		filter.add(fieldName, value);
		
		filterValue = filter.toString();
	}

	public String getFieldName() {
		return fieldName;
	}

	public Object getFieldValue() {
		return fieldValue;
	}
	
	public String getValue(DataObject dataObject) throws Exception {
		if (filterValue == null) {
			init(dataObject);
		}
		
		return filterValue;
	}

	public boolean isEmpty() {
		return empty;
	}
	
}