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/**
 * Copyright (c) 2009-2014, Lukas Eder, [email protected]
 * All rights reserved.
 *
 * This software is licensed to you under the Apache License, Version 2.0
 * (the "License"); You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * . Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 *
 * . Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * . Neither the name "jOOQ" nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without
 *   specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package org.jooq.impl;

import static org.jooq.impl.DSL.count;
import static org.jooq.impl.DSL.select;

import java.sql.ResultSetMetaData;
import java.util.List;

import org.jooq.Clause;
import org.jooq.Configuration;
import org.jooq.Context;
import org.jooq.Field;
import org.jooq.QueryPart;
import org.jooq.Record1;
import org.jooq.Select;

/**
 * @author Lukas Eder
 */
class FetchCount extends AbstractResultQuery> {

    /**
     * Generated UID
     */
    private static final long serialVersionUID = -1093806354311260458L;

    private final Field[]  count            = { count().as("c") };
    private final Select   query;

    FetchCount(Configuration configuration, Select query) {
        super(configuration);

        this.query = query;
    }

    @Override
    public final void accept(Context ctx) {
        ctx.visit(delegate(ctx.configuration()));
    }

    private final QueryPart delegate(Configuration configuration) {
        switch (configuration.dialect().family()) {

            /* [pro] xx
            xx xxxxxxx xxxx xxxxxxxx xxxxxx xxxx xxxxxxx xxxxxx xxxx xxxxxxx
            xx xxxxxxx xx xxxxx xxxxx x xxxxxxx xxxxxx xxxx xxxxxxxx
            xxxx xxxxxxxxxx
            xxxx xxxxxxx x
                xxxxxxxxxxxxxx xxxxxx x xxxxxxxxxxxxxxxxxx
                xxxxxxxx xxxxx x xxx xxxxxxxxxxxxxxxxxxxxxx

                xxx xxxx x x xx x x xxxxxxxxxxxxx xxxx
                    xxxxxxxx x xxx x xx x xxx

                xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
            x

            xx [/pro] */
            default:
                return select(count).from(query.asTable("q"));
        }
    }

    @Override
    public final Clause[] clauses(Context ctx) {
        return null;
    }

    @SuppressWarnings({ "unchecked", "rawtypes" })
    @Override
    public final Class> getRecordType() {
        return (Class) RecordImpl.class;
    }

    @Override
    protected final Field[] getFields(ResultSetMetaData rs) {
        return count;
    }

    @Override
    final boolean isForUpdate() {
        return false;
    }
}