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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Middleware LLC.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program 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 distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 *
 */
package org.hibernate.sql;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;

import org.hibernate.internal.util.StringHelper;

/**
 * A fragment of an SQL SELECT clause
 *
 * @author Gavin King
 */
public class SelectFragment {
	private String suffix;
	private List columns = new ArrayList();
	//private List aliases = new ArrayList();
	private List columnAliases = new ArrayList();
	private String extraSelectList;
	private String[] usedAliases;

	public SelectFragment() {}

	public List getColumns() {
		return columns;
	}

	public String getExtraSelectList() {
		return extraSelectList;
	}

	public SelectFragment setUsedAliases(String[] aliases) {
		usedAliases = aliases;
		return this;
	}

	public SelectFragment setExtraSelectList(String extraSelectList) {
		this.extraSelectList = extraSelectList;
		return this;
	}

	public SelectFragment setExtraSelectList(CaseFragment caseFragment, String fragmentAlias) {
		setExtraSelectList( caseFragment.setReturnColumnName(fragmentAlias, suffix).toFragmentString() );
		return this;
	}

	public SelectFragment setSuffix(String suffix) {
		this.suffix = suffix;
		return this;
	}

	public SelectFragment addColumn(String columnName) {
		addColumn(null, columnName);
		return this;
	}

	public SelectFragment addColumns(String[] columnNames) {
		for (int i=0; i




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