zoedb.SQLStatementFactory.java Source code

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Here is the source code for zoedb.SQLStatementFactory.java

Source

/*
 * This file is part of zoedb.
    
 *  zoedb is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  zoedb 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with zoedb.  If not, see <http://www.gnu.org/licenses/>.
 *  
 *  Copyright 2013 Robert Frankenberger
 */

package zoedb;

import java.lang.reflect.Constructor;
import java.util.HashMap;
import java.util.logging.LogManager;

import org.json.JSONObject;

import zoedb.exception.TypeNotRegisteredException;

@SuppressWarnings({ "rawtypes", "unchecked" })
public class SQLStatementFactory {

    private static SQLStatementFactory instance;
    private static HashMap registeredStatementTypes = new HashMap();

    static {
        zoedb.util.TypeLoader.loadTypes();
    }

    public static SQLStatementFactory getInstance() {
        if (instance == null) {
            instance = new SQLStatementFactory();
        }
        return instance;
    }

    public void registerStatementType(String typeName, Class statementClass) {
        registeredStatementTypes.put(typeName, statementClass);
    }

    public SQLStatement getSQLStatement(String stmtType, String tableName) throws Exception {
        Class statementClass = (Class) registeredStatementTypes.get(stmtType);
        if (statementClass == null) {
            throw new TypeNotRegisteredException(stmtType, this.getClass());
        }
        Constructor statementConstructor = statementClass.getDeclaredConstructor(new Class[] { String.class });
        return (SQLStatement) statementConstructor.newInstance(tableName);
    }

    public SQLStatement getSQLStatement(String stmtType, JSONObject json) throws Exception {
        Class statementClass = (Class) registeredStatementTypes.get(stmtType);
        if (statementClass == null) {
            throw new TypeNotRegisteredException(stmtType, this.getClass());
        }
        Constructor statementConstructor = statementClass.getDeclaredConstructor(new Class[] { JSONObject.class });
        return (SQLStatement) statementConstructor.newInstance(json);
    }

    public SQLStatement getSQLStatement(String stmtType) throws Exception {
        return getSQLStatement(stmtType, "");
    }
}