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}