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A Paradox Java Driver (using JDBC 4)
There is a newer version: 1.6.3
/*
 * ProcedureAS.java 03/14/2009 Copyright (C) 2009 Leonardo Alves da Costa This program 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. 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 General Public License for more details. You should have received a
 * copy of the GNU General Public License along with this program. If not, see .
 */
package com.googlecode.paradox.procedures;

import com.googlecode.paradox.procedures.math.Average;
import com.googlecode.paradox.procedures.math.Count;
import com.googlecode.paradox.procedures.math.Max;
import com.googlecode.paradox.procedures.math.Min;
import com.googlecode.paradox.procedures.math.Sum;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/**
 * Stores the procedures in this driver.
 *
 * @author Leonardo Alves da Costa
 * @version 1.1
 * @since 1.0
 */
public final class ProcedureAS {
    
    /**
     * Default instance.
     */
    private static final ProcedureAS INSTANCE = new ProcedureAS();
    
    /**
     * All registered procedures.
     */
    private final List procedures = new ArrayList<>();
    
    /**
     * Register the default procedures.
     */
    private ProcedureAS() {
        this.register(new Average());
        this.register(new Count());
        this.register(new Max());
        this.register(new Min());
        this.register(new Sum());
    }
    
    /**
     * Gets the instance.
     *
     * @return the instance.
     */
    public static ProcedureAS getInstance() {
        return ProcedureAS.INSTANCE;
    }
    
    /**
     * Gets the procedure by name.
     *
     * @param name
     *            the procedure name.
     * @return the procedure.
     */
    public AbstractCallableProcedure get(final String name) {
        for (final AbstractCallableProcedure procedure : this.procedures) {
            if (procedure.getName().equalsIgnoreCase(name)) {
                return procedure;
            }
        }
        return null;
    }
    
    /**
     * Gets the procedures list.
     *
     * @return the procedures list.
     */
    public List list() {
        return Collections.unmodifiableList(this.procedures);
    }
    
    /**
     * Registers a new procedure.
     *
     * @param procedure
     *            the procedure to register.
     */
    private void register(final AbstractCallableProcedure procedure) {
        this.procedures.add(procedure);
    }
}