org.jooq.impl.ExistsCondition Maven / Gradle / Ivy
/**
* Copyright (c) 2009-2014, Data Geekery GmbH (http://www.datageekery.com)
* All rights reserved.
*
* This work is dual-licensed
* - under the Apache Software License 2.0 (the "ASL")
* - under the jOOQ License and Maintenance Agreement (the "jOOQ License")
* =============================================================================
* You may choose which license applies to you:
*
* - If you're using this work with Open Source databases, you may choose
* either ASL or jOOQ License.
* - If you're using this work with at least one commercial database, you must
* choose jOOQ License
*
* For more information, please visit http://www.jooq.org/licenses
*
* Apache Software License 2.0:
* -----------------------------------------------------------------------------
* 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.
*
* jOOQ License and Maintenance Agreement:
* -----------------------------------------------------------------------------
* Data Geekery grants the Customer the non-exclusive, timely limited and
* non-transferable license to install and use the Software under the terms of
* the jOOQ License and Maintenance Agreement.
*
* This library is distributed with a LIMITED WARRANTY. See the jOOQ License
* and Maintenance Agreement for more details: http://www.jooq.org/licensing
*/
package org.jooq.impl;
import static org.jooq.Clause.CONDITION;
import static org.jooq.Clause.CONDITION_EXISTS;
import static org.jooq.Clause.CONDITION_NOT_EXISTS;
import org.jooq.Clause;
import org.jooq.Context;
import org.jooq.Select;
/**
* @author Lukas Eder
*/
class ExistsCondition extends AbstractCondition {
private static final long serialVersionUID = 5678338161136603292L;
private static final Clause[] CLAUSES_EXISTS = { CONDITION, CONDITION_EXISTS };
private static final Clause[] CLAUSES_EXISTS_NOT = { CONDITION, CONDITION_NOT_EXISTS };
private final Select query;
private final boolean exists;
ExistsCondition(Select query, boolean exists) {
this.query = query;
this.exists = exists;
}
@Override
public final void accept(Context ctx) {
boolean subquery = ctx.subquery();
ctx.keyword(exists ? "exists" : "not exists")
.sql(" (")
.subquery(true)
.formatIndentStart()
.formatNewLine()
.visit(query)
.formatIndentEnd()
.formatNewLine()
.subquery(subquery)
.sql(")");
}
@Override
public final Clause[] clauses(Context ctx) {
return exists ? CLAUSES_EXISTS : CLAUSES_EXISTS_NOT;
}
}