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//$Id: Expression.java 5685 2005-02-12 07:19:50Z steveebersole $
package org.hibernate.criterion;

import org.hibernate.type.Type;
import org.hibernate.util.ArrayHelper;


/**
 * This class is semi-deprecated. Use Restrictions.
 *
 * @see Restrictions
 * @author Gavin King
 */
public final class Expression extends Restrictions {

	private Expression() {
		//cannot be instantiated
	}

	/**
	 * Apply a constraint expressed in SQL, with the given JDBC
	 * parameters. Any occurrences of {alias} will be
	 * replaced by the table alias.
	 *
	 * @param sql
	 * @param values
	 * @param types
	 * @return Criterion
	 */
	public static Criterion sql(String sql, Object[] values, Type[] types) {
		return new SQLCriterion(sql, values, types);
	}
	/**
	 * Apply a constraint expressed in SQL, with the given JDBC
	 * parameter. Any occurrences of {alias} will be replaced
	 * by the table alias.
	 *
	 * @param sql
	 * @param value
	 * @param type
	 * @return Criterion
	 */
	public static Criterion sql(String sql, Object value, Type type) {
		return new SQLCriterion(sql, new Object[] { value }, new Type[] { type } );
	}
	/**
	 * Apply a constraint expressed in SQL. Any occurrences of {alias}
	 * will be replaced by the table alias.
	 *
	 * @param sql
	 * @return Criterion
	 */
	public static Criterion sql(String sql) {
		return new SQLCriterion(sql, ArrayHelper.EMPTY_OBJECT_ARRAY, ArrayHelper.EMPTY_TYPE_ARRAY);
	}

}