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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2010, Red Hat Inc. 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 Inc.
 *
 * 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.cfg;

import java.io.Serializable;

import org.hibernate.AssertionFailure;
import org.hibernate.internal.util.StringHelper;

/**
 * An improved naming strategy that prefers embedded
 * underscores to mixed case names
 * @see DefaultNamingStrategy the default strategy
 * @author Gavin King
 */
public class ImprovedNamingStrategy implements NamingStrategy, Serializable {

	/**
	 * A convenient singleton instance
	 */
	public static final NamingStrategy INSTANCE = new ImprovedNamingStrategy();

	/**
	 * Return the unqualified class name, mixed case converted to
	 * underscores
	 */
	public String classToTableName(String className) {
		return addUnderscores( StringHelper.unqualify(className) );
	}
	/**
	 * Return the full property path with underscore seperators, mixed
	 * case converted to underscores
	 */
	public String propertyToColumnName(String propertyName) {
		return addUnderscores( StringHelper.unqualify(propertyName) );
	}
	/**
	 * Convert mixed case to underscores
	 */
	public String tableName(String tableName) {
		return addUnderscores(tableName);
	}
	/**
	 * Convert mixed case to underscores
	 */
	public String columnName(String columnName) {
		return addUnderscores(columnName);
	}

	protected static String addUnderscores(String name) {
		StringBuilder buf = new StringBuilder( name.replace('.', '_') );
		for (int i=1; i




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