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TSL2 JEE Service Access (Generic Services for Entity Access, JEE File-System-Connector, Generic Featuring, Job-Scheduling, BeanContainer, Batch, Comfortable Bean Query Definitions, JAAS, Authentification, Authorization, )

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package de.tsl2.nano.service.util.finder;

import java.util.Collection;

import de.tsl2.nano.service.util.ServiceUtil;

/**
 * TODO: implement additional union statement creator
 * 
 * @param  result bean type
 * @author Thomas Schneider, Thomas Schneider
 * @version $Revision$
 */
public class Union extends Expression {
    /** serialVersionUID */
    private static final long serialVersionUID = -6987663981295488159L;

    /**
     * constructor
     * 
     * @param attributeNames, for ascending use prefix +. for descendings prefix -. default is ascending.
     */
    public Union(Class resultType) {
        super(resultType, createUnion(resultType), false, new Object[] {});
    }

    @Override
    StringBuffer createQuery(StringBuffer currentQuery,
            Collection