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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
 *
 *
 *
 *
 *
 *
 *
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 *
 */
package org.jooq;

import java.util.Map;

/**
 * An intermediary step in creating a case statement of the type  * CASE x WHEN 1 THEN 'one'
 *        WHEN 2 THEN 'two'
 *        ELSE        'three'
 * END
 * 
 *
 * @param  The type of values being compared in this case statement
 * @author Lukas Eder
 * @see Case
 */
public interface CaseValueStep {

    /**
     * Compare a value to the already constructed case statement, return result
     * if values are equal.
     *
     * @param  The generic result field type parameter
     * @param compareValue The value to compare with the already constructed
     *            case statement
     * @param result The result value if values are equal
     * @return An intermediary step for case statement construction
     */
    @Support
     CaseWhenStep when(V compareValue, T result);

    /**
     * Compare a value to the already constructed case statement, return result
     * if values are equal.
     *
     * @param  The generic result field type parameter
     * @param compareValue The value to compare with the already constructed
     *            case statement
     * @param result The result value if values are equal
     * @return An intermediary step for case statement construction
     */
    @Support
     CaseWhenStep when(V compareValue, Field result);

    /**
     * Compare a value to the already constructed case statement, return result
     * if values are equal.
     *
     * @param  The generic result field type parameter
     * @param compareValue The value to compare with the already constructed
     *            case statement
     * @param result The result value if values are equal
     * @return An intermediary step for case statement construction
     */
    @Support
     CaseWhenStep when(V compareValue, Select> result);

    /**
     * Compare a value to the already constructed case statement, return result
     * if values are equal.
     *
     * @param  The generic result field type parameter
     * @param compareValue The value to compare with the already constructed
     *            case statement
     * @param result The result value if values are equal
     * @return An intermediary step for case statement construction
     */
    @Support
     CaseWhenStep when(Field compareValue, T result);

    /**
     * Compare a value to the already constructed case statement, return result
     * if values are equal.
     *
     * @param  The generic result field type parameter
     * @param compareValue The value to compare with the already constructed
     *            case statement
     * @param result The result value if values are equal
     * @return An intermediary step for case statement construction
     */
    @Support
     CaseWhenStep when(Field compareValue, Field result);

    /**
     * Compare a value to the already constructed case statement, return result
     * if values are equal.
     *
     * @param  The generic result field type parameter
     * @param compareValue The value to compare with the already constructed
     *            case statement
     * @param result The result value if values are equal
     * @return An intermediary step for case statement construction
     */
    @Support
     CaseWhenStep when(Field compareValue, Select> result);

    /**
     * Create WHEN .. THEN expressions from a {@link Map}.
     * 
     * This will iterate over the map's entries to create individual
     * WHEN .. THEN expressions for each map entry.
     */
     CaseWhenStep mapValues(Map values);

    /**
     * Create WHEN .. THEN expressions from a {@link Map}.
     * 
     * This will iterate over the map's entries to create individual
     * WHEN .. THEN expressions for each map entry.
     */
     CaseWhenStep mapFields(Map, ? extends Field> fields);

}