/*
 * HA-JDBC: High-Availability JDBC
 * Copyright (C) 2012  Paul Ferraro
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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 program.  If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.hajdbc.sql;

import java.lang.reflect.Method;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Set;

import net.sf.hajdbc.Database;
import net.sf.hajdbc.invocation.InvocationStrategies;
import net.sf.hajdbc.invocation.InvocationStrategy;
import net.sf.hajdbc.util.reflect.Methods;

/**
 * @author Paul Ferraro
 * @param <D> 
 */
@SuppressWarnings("nls")
public class CallableStatementInvocationHandler<Z, D extends Database<Z>> extends AbstractPreparedStatementInvocationHandler<Z, D, CallableStatement, CallableStatementProxyFactory<Z, D>>
{
	private static final Set<Method> registerOutParameterMethods = Methods.findMethods(CallableStatement.class, "registerOutParameter");
	private static final Set<Method> setMethods = Methods.findMethods(CallableStatement.class, "set\\w+");
	private static final Set<Method> driverReadMethods = Methods.findMethods(CallableStatement.class, "get\\w+", "wasNull");
	{
		driverReadMethods.removeAll(Methods.findMethods(PreparedStatement.class, "get\\w+"));
	}
	
	public CallableStatementInvocationHandler(CallableStatementProxyFactory<Z, D> proxyFactory)
	{
		super(CallableStatement.class, proxyFactory, setMethods);
	}

	/**
	 * @see net.sf.hajdbc.sql.AbstractStatementInvocationHandler#getInvocationStrategy(java.sql.Statement, java.lang.reflect.Method, java.lang.Object[])
	 */
	@Override
	protected InvocationStrategy getInvocationStrategy(CallableStatement statement, Method method, Object... parameters) throws SQLException
	{
		if (registerOutParameterMethods.contains(method))
		{
			return InvocationStrategies.INVOKE_ON_EXISTING;
		}
		
		if (driverReadMethods.contains(method))
		{
			return InvocationStrategies.INVOKE_ON_ANY;
		}
		
		return super.getInvocationStrategy(statement, method, parameters);
	}

	/**
	 * @see net.sf.hajdbc.sql.AbstractPreparedStatementInvocationHandler#isBatchMethod(java.lang.reflect.Method)
	 */
	@Override
	protected boolean isBatchMethod(Method method)
	{
		return registerOutParameterMethods.contains(method) || super.isBatchMethod(method);
	}

	/**
	 * @see net.sf.hajdbc.sql.AbstractPreparedStatementInvocationHandler#isIndexType(java.lang.Class)
	 */
	@Override
	protected boolean isIndexType(Class<?> type)
	{
		return super.isIndexType(type) || type.equals(String.class);
	}
}