/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
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 *
 * Other licenses:
 * -----------------------------------------------------------------------------
 * Commercial licenses for this work are available. These replace the above
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 * database integrations.
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 * For more information, please visit: http://www.jooq.org/licenses
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package org.jooq;

/**
 * The final step in creating a case statement of the type <code><pre>
 * CASE WHEN x < 1  THEN 'one'
 *      WHEN x >= 2 THEN 'two'
 *      ELSE            'three'
 * END
 * </pre></code>
 *
 * @param <T> The type returned by this case statement
 * @author Lukas Eder
 * @see Case
 */
public interface CaseConditionStep<T> extends Field<T> {

    /**
     * Compare a condition to the already constructed case statement, return
     * result if the condition holds true
     *
     * @param condition The condition to add to the case statement
     * @param result The result value if the condition holds true
     * @return An intermediary step for case statement construction
     */
    @Support
    CaseConditionStep<T> when(Condition condition, T result);

    /**
     * Compare a condition to the already constructed case statement, return
     * result if the condition holds true
     *
     * @param condition The condition to add to the case statement
     * @param result The result value if the condition holds true
     * @return An intermediary step for case statement construction
     */
    @Support
    CaseConditionStep<T> when(Condition condition, Field<T> result);

    /**
     * Compare a condition to the already constructed case statement, return
     * result if the condition holds true
     *
     * @param condition The condition to add to the case statement
     * @param result The result value if the condition holds true
     * @return An intermediary step for case statement construction
     */
    @Support
    CaseConditionStep<T> when(Condition condition, Select<? extends Record1<T>> result);

    /**
     * Add an else clause to the already constructed case statement
     *
     * @param result The result value if no other value matches the case
     * @return The resulting field from case statement construction
     */
    @Support
    Field<T> otherwise(T result);

    /**
     * Add an else clause to the already constructed case statement
     *
     * @param result The result value if no other value matches the case
     * @return The resulting field from case statement construction
     */
    @Support
    Field<T> otherwise(Field<T> result);

    /**
     * Add an else clause to the already constructed case statement
     *
     * @param result The result value if no other value matches the case
     * @return The resulting field from case statement construction
     */
    @Support
    Field<T> otherwise(Select<? extends Record1<T>> result);
}