001/*
002 * HA-JDBC: High-Availability JDBC
003 * Copyright (C) 2012  Paul Ferraro
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Lesser General Public License as published by
007 * the Free Software Foundation, either version 3 of the License, or
008 * (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU Lesser General Public License for more details.
014 *
015 * You should have received a copy of the GNU Lesser General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018package net.sf.hajdbc.sql;
019
020import java.lang.reflect.Method;
021import java.sql.Connection;
022import java.sql.DatabaseMetaData;
023import java.sql.SQLException;
024import java.util.Set;
025
026import net.sf.hajdbc.Database;
027import net.sf.hajdbc.invocation.InvocationStrategies;
028import net.sf.hajdbc.invocation.InvocationStrategy;
029import net.sf.hajdbc.util.reflect.Methods;
030
031/**
032 * @author Paul Ferraro
033 *
034 */
035public class DatabaseMetaDataInvocationHandler<Z, D extends Database<Z>> extends ChildInvocationHandler<Z, D, Connection, SQLException, DatabaseMetaData, SQLException, DatabaseMetaDataProxyFactory<Z, D>>
036{
037        private static final Set<Method> databaseReadMethodSet = Methods.findMethods(DatabaseMetaData.class, "getAttributes", "getBestRowIdentifier", "getCatalogs", "getColumnPrivileges", "getColumns", "getCrossReference", "getExportedKeys", "getFunctionColumns", "getFunctions", "getImportedKeys", "getIndexInfo", "getPrimaryKeys", "getProcedureColumns", "getProcedures", "getPseudoColumns", "getSchemas", "getSuperTables", "getSuperTypes", "getTablePrivileges", "getTables", "getUDTs", "getVersionColumns");
038        private static final Method getConnectionMethod = Methods.getMethod(DatabaseMetaData.class, "getConnection");
039        
040        
041        public DatabaseMetaDataInvocationHandler(DatabaseMetaDataProxyFactory<Z, D> proxyFactory)
042        {
043                super(DatabaseMetaData.class, proxyFactory, getConnectionMethod);
044        }
045
046        @Override
047        protected InvocationStrategy getInvocationStrategy(DatabaseMetaData metaData, Method method, Object... parameters)
048        {
049                if (databaseReadMethodSet.contains(method))
050                {
051                        return InvocationStrategies.INVOKE_ON_NEXT;
052                }
053                
054                return InvocationStrategies.INVOKE_ON_ANY;
055        }
056}