com.jpattern.orm.query.clause.OrmOrderBy Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jporm-api Show documentation

There is a newer version: 3.5.1

package com.jpattern.orm.query.clause;

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

import com.jpattern.orm.query.INameSolver;
import com.jpattern.orm.query.IQueryRoot;
import com.jpattern.orm.query.NullNameSolver;
import com.jpattern.orm.query.order.OrderByType;
import com.jpattern.orm.query.order.OrderElement;
import com.jpattern.orm.query.order.OrmOrderElement;

/**
 * 
 * @author Francesco Cina
 *
 * 24/giu/2011
 */
public class OrmOrderBy implements OrderBy {

	private INameSolver nameSolver = new NullNameSolver();
	private final List elementList = new ArrayList();
	private final T query;

	public OrmOrderBy(T query) {
		this.query = query;
	}

	@Override
	public OrderBy asc(String property) {
		elementList.add(new OrmOrderElement(nameSolver, property, elementList.isEmpty(), OrderByType.ASC));
		return this;
	}

	@Override
	public OrderBy desc(String property) {
		elementList.add(new OrmOrderElement(nameSolver, property, elementList.isEmpty(), OrderByType.DESC));
		return this;
	}

	@Override
	public String renderSql() {
		final StringBuilder query = new StringBuilder();
		renderSql(query);
		return query.toString();
	}

	@Override
	public void renderSql(StringBuilder StringBuilder) {
		if (!elementList.isEmpty()) {
			StringBuilder.append("ORDER BY ");
			for (final OrderElement expressionElement : elementList) {
				expressionElement.renderSql(StringBuilder);
			}
		}
	}

	@Override
	public void setNameSolver(INameSolver nameSolver) {
		this.nameSolver  = nameSolver;
	}

	@Override
	public T query() {
		return query;
	}

}