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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 org.jooq.exception.DataAccessException;

/**
 * Base functionality declaration for all query objects
 * 
 * This interface is for JOOQ INTERNAL USE only. Do not reference directly
 *
 * @author Lukas Eder
 */
public interface QueryPartInternal extends QueryPart {

    /**
     * This {@link QueryPart} can accept a {@link Context} object
     * in order to render a SQL string or to bind its variables.
     *
     * @deprecated - Calling {@link #accept(Context)} directly on a
     *             {@link QueryPart} is almost always a mistake. Instead,
     *             {@link Context#visit(QueryPart)} should be called.
     */
    @Deprecated
    void accept(Context ctx);

    /**
     * Render this {@link QueryPart} to a SQL string contained in
     * context.sql(). The context will contain
     * additional information about how to render this QueryPart,
     * e.g. whether this QueryPart should be rendered as a
     * declaration or reference, whether this QueryPart's contained
     * bind variables should be inlined or replaced by '?', etc.
     *
     * @deprecated - 3.4.0 - [#2694] - Use {@link #accept(Context)} instead.
     */
    @Deprecated
    void toSQL(RenderContext ctx);

    /**
     * Bind all parameters of this {@link QueryPart} to a PreparedStatement
     * 

     * This method is for JOOQ INTERNAL USE only. Do not reference directly
     *
     * @param ctx The context holding the next bind index and other information
     *            for variable binding
     * @throws DataAccessException If something went wrong while binding a
     *             variable
     * @deprecated - 3.4.0 - [#2694] - Use {@link #accept(Context)} instead.
     */
    @Deprecated
    void bind(BindContext ctx) throws DataAccessException;

    /**
     * The {@link Clause}s that are represented by this query part.
     * 

     * {@link QueryPart}s can specify several Clauses for which an
     * event will be emitted {@link Context#start(Clause) before} (in forward
     * order) and {@link Context#end(Clause) after} (in reverse order) visiting
     * the the query part through {@link Context#visit(QueryPart)}
     * 

     * This method is for JOOQ INTERNAL USE only. Do not reference directly
     *
     * @return The Clauses represented by this query part or
     *         null or an empty array if this query part does not
     *         represent a clause.
     */
    Clause[] clauses(Context ctx);

    /**
     * Check whether this {@link QueryPart} is able to declare fields in a
     * SELECT clause.
     * 

     * This method can be used by any {@link Context} to check how a certain SQL
     * clause should be rendered.
     * 

     * This method is for JOOQ INTERNAL USE only. Do not reference directly
     */
    boolean declaresFields();

    /**
     * Check whether this {@link QueryPart} is able to declare tables in a
     * FROM clause or JOIN clause.
     * 

     * This method can be used by any {@link Context} to check how a certain SQL
     * clause should be rendered.
     * 

     * This method is for JOOQ INTERNAL USE only. Do not reference directly
     */
    boolean declaresTables();

    /**
     * Check whether this {@link QueryPart} is able to declare windows in a
     * WINDOW clause.
     * 

     * This method can be used by any {@link Context} to check how a certain SQL
     * clause should be rendered.
     * 

     * This method is for JOOQ INTERNAL USE only. Do not reference directly
     */
    boolean declaresWindows();

    /**
     * Check whether this {@link QueryPart} is able to declare common table
     * expressions in a WITH clause.
     * 

     * This method can be used by any {@link Context} to check how a certain SQL
     * clause should be rendered.
     * 

     * This method is for JOOQ INTERNAL USE only. Do not reference directly
     */
    boolean declaresCTE();

    /**
     * Check whether this {@link QueryPart} is able to generate
     * CAST expressions around bind variables.
     * 

     * This method can be used by any {@link Context} to check how a certain SQL
     * clause should be rendered.
     * 
     * This method is for JOOQ INTERNAL USE only. Do not reference directly
     */
    boolean generatesCast();
}