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/**
 * Copyright (c) 2009-2016, Data Geekery GmbH (http://www.datageekery.com)
 * 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.
 *
 * 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
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */
package org.jooq.impl;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.jooq.Context;
import org.jooq.Field;
import org.jooq.Record;
import org.jooq.Table;

/**
 * @author Lukas Eder
 */
final class RowsFrom extends AbstractTable {

    /**
     * Generated UID
     */
    private static final long serialVersionUID = 693765524746506586L;

    private final TableList tables;

    RowsFrom(Table... tables) {
        super("rows from");

        this.tables = new TableList(Arrays.asList(tables));
    }

    @Override
    public final Class getRecordType() {
        return RecordImpl.class;
    }

    @Override
    public final Table as(String alias) {
        return new TableAlias(this, alias);
    }

    @Override
    public final Table as(String alias, String... fieldAliases) {
        return new TableAlias(this, alias, fieldAliases);
    }

    @Override
    final Fields fields0() {
        List> fields = new ArrayList>();

        for (Table table : tables)
            for (Field field : table.fields())
                fields.add(DSL.field(DSL.name(field.getName()), field.getDataType()));

        return new Fields(fields);
    }

    @Override
    public final void accept(Context ctx) {
        boolean declareTables = ctx.declareTables();

        ctx.keyword("rows from")
           .sql(" (")
           .declareTables(true)
           .visit(tables)
           .declareTables(declareTables)
           .sql(')');
    }
}