org.sql.generation.api.grammar.modification.ColumnSource Maven / Gradle / Ivy

/*
 * Copyright (c) 2010, Stanislav Muhametsin. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.sql.generation.api.grammar.modification;

import org.atp.api.Typeable;

/**
 * This is common interface for syntax elements representing the data source for columns in {@code INSERT INTO}
 * statement.
 * 
 * @author Stanislav Muhametsin
 * @see InsertStatement
 */
public interface ColumnSource
    extends Typeable
{
    /**
     * This syntax element represents when default values of columns are wanted to be inserted into table.
     * 
     * @author Stanislav Muhametsin
     */
    public static final class Defaults
        implements ColumnSource
    {
        private Defaults()
        {

        }

        /**
         * Returns {@link Defaults}.
         */
        public Class getImplementedType()
        {
            return Defaults.class;
        }

        /**
         * The singleton reference to object of this class.
         */
        public static final Defaults INSTANCE = new Defaults();
    }
}