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/**
 * Copyright (c) 2009-2013, 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 static org.jooq.impl.DSL.table;

import java.sql.SQLException;
import java.util.List;

import org.jooq.Record;
import org.jooq.Table;

/**
 * A base implementation for table definitions.
 *
 * @author Lukas Eder
 */
public abstract class AbstractTableDefinition
extends AbstractElementContainerDefinition
implements TableDefinition {

    private List       uniqueKeys;
    private List      foreignKeys;
    private List checkConstraints;
    private boolean                         primaryKeyLoaded;
    private UniqueKeyDefinition             primaryKey;
    private boolean                         identityLoaded;
    private IdentityDefinition              identity;

    public AbstractTableDefinition(SchemaDefinition schema, String name, String comment) {
        super(schema, name, comment);
    }

    @Override
    public final UniqueKeyDefinition getPrimaryKey() {
        if (!primaryKeyLoaded) {
            primaryKeyLoaded = true;

            // Try finding a primary key first
            for (ColumnDefinition column : getColumns()) {
                if (column.getPrimaryKey() != null) {
                    primaryKey = column.getPrimaryKey();
                    return primaryKey;
                }
            }
        }

        return primaryKey;
    }

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

        return uniqueKeys;
    }

    @Override
    public final List getForeignKeys() {
        if (foreignKeys == null) {
            foreignKeys = getDatabase().getRelations().getForeignKeys(this);
        }

        return foreignKeys;
    }

    @Override
    public final List getCheckConstraints() {
        if (checkConstraints == null) {
            checkConstraints = getDatabase().getRelations().getCheckConstraints(this);
        }

        return checkConstraints;
    }

    @Override
    public final IdentityDefinition getIdentity() {
        if (!identityLoaded) {
            identityLoaded = true;

            for (ColumnDefinition column : getColumns()) {
                if (column.isIdentity()) {
                    identity = new DefaultIdentityDefinition(column);
                    break;
                }
            }
        }

        return identity;
    }

    @Override
    public final Table getTable() {
        return table(getQualifiedName());
    }

    @Override
    public final List getColumns() {
        return getElements();
    }

    @Override
    public final ColumnDefinition getColumn(String columnName) {
        return getElement(columnName);
    }

    @Override
    public final ColumnDefinition getColumn(String columnName, boolean ignoreCase) {
        return getElement(columnName, ignoreCase);
    }

    @Override
    protected List getElements0() throws SQLException {
        return null;
    }

    @Override
    public final ColumnDefinition getColumn(int columnIndex) {
        return getElement(columnIndex);
    }
}