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/**
 * Copyright (c) 2009-2014, Data Geekery GmbH (http://www.datageekery.com)
 * All rights reserved.
 *
 * This work is dual-licensed
 * - under the Apache Software License 2.0 (the "ASL")
 * - under the jOOQ License and Maintenance Agreement (the "jOOQ License")
 * =============================================================================
 * You may choose which license applies to you:
 *
 * - If you're using this work with Open Source databases, you may choose
 *   either ASL or jOOQ License.
 * - If you're using this work with at least one commercial database, you must
 *   choose jOOQ License
 *
 * For more information, please visit http://www.jooq.org/licenses
 *
 * Apache Software License 2.0:
 * -----------------------------------------------------------------------------
 * 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.
 *
 * jOOQ License and Maintenance Agreement:
 * -----------------------------------------------------------------------------
 * Data Geekery grants the Customer the non-exclusive, timely limited and
 * non-transferable license to install and use the Software under the terms of
 * the jOOQ License and Maintenance Agreement.
 *
 * This library is distributed with a LIMITED WARRANTY. See the jOOQ License
 * and Maintenance Agreement for more details: http://www.jooq.org/licensing
 */

package org.jooq.util;

import java.util.List;

/**
 * A base implementation for column definitions.
 *
 * @author Lukas Eder
 */
public class DefaultColumnDefinition
    extends AbstractTypedElementDefinition
    implements ColumnDefinition {

    private final int                  position;
    private final boolean              isIdentity;

    private boolean                    primaryKeyLoaded;
    private UniqueKeyDefinition        primaryKey;
    private List  uniqueKeys;
    private boolean                    foreignKeyLoaded;
    private List foreignKey;

    public DefaultColumnDefinition(TableDefinition table, String name, int position, DataTypeDefinition type,
        boolean isIdentity, String comment) {

        super(table, name, position, type, comment);

        this.position = position;
        this.isIdentity = isIdentity;
    }

    @Override
    public final int getPosition() {
        return position;
    }

    @Override
    public final UniqueKeyDefinition getPrimaryKey() {
        if (!primaryKeyLoaded) {
            primaryKeyLoaded = true;
            primaryKey = getDatabase().getRelations().getPrimaryKey(this);
        }

        return primaryKey;
    }

    @Override
    public List getUniqueKeys() {
        if (uniqueKeys == null) {
            uniqueKeys = getDatabase().getRelations().getUniqueKeys(this);
        }

        return uniqueKeys;
    }

    @Override
    public final List getForeignKeys() {
        if (!foreignKeyLoaded) {
            foreignKeyLoaded = true;
            foreignKey = getDatabase().getRelations().getForeignKeys(this);
        }

        return foreignKey;
    }

    @Override
    public final boolean isIdentity() {
        return isIdentity;
    }

    @Override
    public final boolean isNullable() {
        return getType().isNullable();
    }
}