/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2009-2011, 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.ejb.util;

import javax.persistence.FlushModeType;
import javax.persistence.PersistenceException;
import java.util.Map;
import java.util.Properties;

import org.hibernate.AssertionFailure;
import org.hibernate.CacheMode;
import org.hibernate.FlushMode;

/**
 * @author Emmanuel Bernard
 */
public abstract class ConfigurationHelper {
	public static void overrideProperties(Properties properties, Map<?,?> overrides) {
		for ( Map.Entry entry : overrides.entrySet() ) {
			if ( entry.getKey() != null && entry.getValue() != null ) {
				properties.put( entry.getKey(), entry.getValue() );
			}
		}
	}

	public static FlushMode getFlushMode(Object value) {
		FlushMode flushMode = null;
		if (value instanceof FlushMode) {
			flushMode = (FlushMode) value;
		}
		else if (value instanceof javax.persistence.FlushModeType) {
			flushMode = ConfigurationHelper.getFlushMode( (javax.persistence.FlushModeType) value);
		}
		else if (value instanceof String) {
			flushMode = ConfigurationHelper.getFlushMode( (String) value);
		}
		if (flushMode == null) {
			throw new PersistenceException("Unable to parse org.hibernate.flushMode: " + value);
		}
		return flushMode;
	}

	private static FlushMode getFlushMode(String flushMode)  {
		if (flushMode == null) {
			return null;
		}
		flushMode = flushMode.toUpperCase();
		return FlushMode.valueOf( flushMode );
	}

	private static FlushMode getFlushMode(FlushModeType flushMode)  {
		switch(flushMode) {
			case AUTO:
				return FlushMode.AUTO;
			case COMMIT:
				return FlushMode.COMMIT;
			default:
				throw new AssertionFailure("Unknown FlushModeType: " + flushMode);
		}
	}

	public static Integer getInteger(Object value) {
		if ( value instanceof Integer ) {
			return (Integer) value;
		}
		else {
			return Integer.valueOf( (String) value );
		}
	}

	public static Boolean getBoolean(Object value) {
		if ( value instanceof Boolean ) {
			return (Boolean) value;
		}
		else {
			return Boolean.valueOf( (String) value );
		}
	}

	public static CacheMode getCacheMode(Object value) {
		if ( value instanceof CacheMode ) {
			return (CacheMode) value;
		}
		else {
			return CacheMode.valueOf( (String) value );
		}
	}
}