org.jooq.impl.RowIsNull 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 java.util.Arrays.asList;
import static org.jooq.Clause.CONDITION;
import static org.jooq.Clause.CONDITION_IS_NOT_NULL;
import static org.jooq.Clause.CONDITION_IS_NULL;
// ...
import static org.jooq.SQLDialect.CUBRID;
// ...
import static org.jooq.SQLDialect.DERBY;
import static org.jooq.SQLDialect.FIREBIRD;
import static org.jooq.SQLDialect.H2;
import static org.jooq.SQLDialect.HSQLDB;
// ...
// ...
import static org.jooq.SQLDialect.MARIADB;
import static org.jooq.SQLDialect.MYSQL;
// ...
import static org.jooq.SQLDialect.SQLITE;
// ...
// ...
import java.util.ArrayList;
import java.util.List;
import org.jooq.Clause;
import org.jooq.Condition;
import org.jooq.Configuration;
import org.jooq.Context;
import org.jooq.Field;
import org.jooq.Operator;
import org.jooq.QueryPartInternal;
import org.jooq.Row;
/**
* @author Lukas Eder
*/
class RowIsNull extends AbstractCondition {
/**
* Generated UID
*/
private static final long serialVersionUID = -1806139685201770706L;
private static final Clause[] CLAUSES_NULL = { CONDITION, CONDITION_IS_NULL };
private static final Clause[] CLAUSES_NOT_NULL = { CONDITION, CONDITION_IS_NOT_NULL };
private final Row row;
private final boolean isNull;
RowIsNull(Row row, boolean isNull) {
this.row = row;
this.isNull = isNull;
}
@Override
public final void accept(Context ctx) {
delegate(ctx.configuration()).accept(ctx);
}
@Override
public final Clause[] clauses(Context ctx) {
return delegate(ctx.configuration()).clauses(ctx);
}
private final QueryPartInternal delegate(Configuration configuration) {
// CUBRID 9.0.0 and HSQLDB have buggy implementations of the NULL predicate.
// Informix doesn't implement the RVE IS NULL predicate.
if (asList(CUBRID, DERBY, FIREBIRD, H2, HSQLDB, MARIADB, MYSQL, SQLITE).contains(configuration.dialect().family())) {
List conditions = new ArrayList();
for (Field field : row.fields()) {
conditions.add(isNull ? field.isNull() : field.isNotNull());
}
Condition result = new CombinedCondition(Operator.AND, conditions);
return (QueryPartInternal) result;
}
else {
return new Native();
}
}
private class Native extends AbstractCondition {
/**
* Generated UID
*/
private static final long serialVersionUID = -2977241780111574353L;
@Override
public final void accept(Context ctx) {
ctx.visit(row)
.sql(" ")
.keyword(isNull ? "is null" : "is not null");
}
@Override
public final Clause[] clauses(Context ctx) {
return isNull ? CLAUSES_NULL : CLAUSES_NOT_NULL;
}
}
}