package frame.object.dao;

import java.util.ArrayList;
import java.util.List;

import frame.util.Util;
import frame.variant.IVariantsProvider;

public class OrderBy implements IVariantsProvider {

	private String value;
	private boolean empty;
	
	public OrderBy(String value) {
		this.value = value;
		empty = Util.isEmptyStr(value);
	}

	public String getValue() {
		if (empty) {
			return "";
		}
		
		return " order by " + value + " ";
	}

	public boolean isEmpty() {
		return empty;
	}

	@Override
	public List<String> getVariantNameList() {
		List<String> result = new ArrayList<String>();
		result.add("orderby");
		
		return result;
	}

	@Override
	public boolean containsVariant(String name) {
		return "orderby".equalsIgnoreCase(name);
	}

	@Override
	public Object getVariantValue(String name) {
		if (empty) {
			return "";
		}
		
		return value;
	}
	
}