org.jooq.impl.InternalVisitListener Maven / Gradle / Ivy
/**
* 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.impl;
import static java.lang.Boolean.TRUE;
import static org.jooq.impl.DSL.field;
import static org.jooq.impl.DSL.name;
import static org.jooq.impl.Tools.DataKey.DATA_OVERRIDE_ALIASES_IN_ORDER_BY;
import static org.jooq.impl.Tools.DataKey.DATA_UNALIAS_ALIASES_IN_ORDER_BY;
import org.jooq.Field;
import org.jooq.QueryPart;
import org.jooq.VisitContext;
import org.jooq.VisitListener;
/**
* A {@link VisitListener} used by jOOQ internally, to implement some useful
* features.
*
* Features implemented are:
*
[#2790] Keep a locally scoped data map, scoped for the current subquery
*
* Sometimes, it is useful to have some information only available while
* visiting QueryParts in the same context of the current subquery, e.g. when
* communicating between SELECT and WINDOW clause, as is required to emulate
* [#531].
*
*
* @author Lukas Eder
*/
final class InternalVisitListener extends DefaultVisitListener {
}