/* ================================================================
 * JSQLParser : java based sql parser 
 * ================================================================
 *
 * Project Info:  http://jsqlparser.sourceforge.net
 * Project Lead:  Leonardo Francalanci (leoonardoo@yahoo.it);
 *
 * (C) Copyright 2004, by Leonardo Francalanci
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 */
package net.sf.jsqlparser.statement.select;

import java.util.List;

/**
 * A UNION statement
 */
public class Union implements SelectBody {

	private List plainSelects;
	private List orderByElements;
	private Limit limit;
	private boolean distinct;
	private boolean all;
	
	
	public void accept(SelectVisitor selectVisitor){
		selectVisitor.visit(this);
	}

	public List getOrderByElements() {
		return orderByElements;
	}

	/**
	 * the list of {@link PlainSelect}s in this UNION
	 * @return the list of {@link PlainSelect}s
	 */
	public List getPlainSelects() {
		return plainSelects;
	}

	public void setOrderByElements(List orderByElements) {
		this.orderByElements = orderByElements;
	}

	public void setPlainSelects(List list) {
		plainSelects = list;
	}

	public Limit getLimit() {
		return limit;
	}

	public void setLimit(Limit limit) {
		this.limit = limit;
	}
	
	/**
	 * This is not 100% right; every UNION should have their own All/Distinct clause...
	 */
	public boolean isAll() {
		return all;
	}

	public void setAll(boolean all) {
		this.all = all;
	}

	/**
	 * This is not 100% right; every UNION should have their own All/Distinct clause...
	 */
	public boolean isDistinct() {
		return distinct;
	}

	public void setDistinct(boolean distinct) {
		this.distinct = distinct;
	}
	
	public String toString() {

		String selects = "";
		String allDistinct = "";
		if (isAll()) {
			allDistinct = "ALL ";
		} else if (isDistinct()) {
			allDistinct = "DISTINCT ";
		}
			
		for (int i = 0; i < plainSelects.size(); i++) {
			selects += "(" + plainSelects.get(i) + ((i < plainSelects.size() - 1) ? ") UNION " + allDistinct : ")");
		}

		return selects + 
				((orderByElements!=null)?PlainSelect.orderByToString(orderByElements):"") +
				((limit!=null)?limit+"":"");  
	}
	

}