/*
 * 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.
 *
 * Other licenses:
 * -----------------------------------------------------------------------------
 * Commercial licenses for this work are available. These replace the above
 * ASL 2.0 and offer limited warranties, support, maintenance, and commercial
 * database integrations.
 *
 * For more information, please visit: http://www.jooq.org/licenses
 *
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 */
package org.jooq.impl;

import org.jooq.ForeignKey;
import org.jooq.Identity;
import org.jooq.Record;
import org.jooq.Table;
import org.jooq.TableField;
import org.jooq.UniqueKey;

/**
 * A base class for generated static references
 * <p>
 * This type is for JOOQ INTERNAL USE only. Do not reference directly
 *
 * @author Lukas Eder
 */
public abstract class AbstractKeys {

    /**
     * Factory method for identities
     */
    protected static <R extends Record, T> Identity<R, T> createIdentity(Table<R> table, TableField<R, T> field) {
        return new IdentityImpl<R, T>(table, field);
    }

    /**
     * Factory method for unique keys
     */

    @SafeVarargs

    protected static <R extends Record> UniqueKey<R> createUniqueKey(Table<R> table, TableField<R, ?>... fields) {
        return new UniqueKeyImpl<R>(table, fields);
    }

    /**
     * Factory method for unique keys
     */

    @SafeVarargs

    protected static <R extends Record> UniqueKey<R> createUniqueKey(Table<R> table, String name, TableField<R, ?>... fields) {
        return new UniqueKeyImpl<R>(table, name, fields);
    }

    /**
     * Factory method for foreign keys
     */

    @SafeVarargs

    protected static <R extends Record, U extends Record> ForeignKey<R, U> createForeignKey(UniqueKey<U> key, Table<R> table, TableField<R, ?>... fields) {
        return createForeignKey(key, table, null, fields);
    }

    /**
     * Factory method for foreign keys
     */

    @SafeVarargs

    protected static <R extends Record, U extends Record> ForeignKey<R, U> createForeignKey(UniqueKey<U> key, Table<R> table, String name, TableField<R, ?>... fields) {
        ForeignKey<R, U> result = new ReferenceImpl<R, U>(key, table, name, fields);

        if (key instanceof UniqueKeyImpl) {
            ((UniqueKeyImpl<U>) key).references.add(result);
        }

        return result;
    }
}