144 lines
4.7 KiB
Java
144 lines
4.7 KiB
Java
/**
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* Copyright (c) 2009-2014, Data Geekery GmbH (http://www.datageekery.com)
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* All rights reserved.
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*
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* This work is dual-licensed
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* - under the Apache Software License 2.0 (the "ASL")
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* - under the jOOQ License and Maintenance Agreement (the "jOOQ License")
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* =============================================================================
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* You may choose which license applies to you:
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*
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* - If you're using this work with Open Source databases, you may choose
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* either ASL or jOOQ License.
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* - If you're using this work with at least one commercial database, you must
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* choose jOOQ License
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*
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* For more information, please visit http://www.jooq.org/licenses
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*
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* Apache Software License 2.0:
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* -----------------------------------------------------------------------------
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* jOOQ License and Maintenance Agreement:
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* -----------------------------------------------------------------------------
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* Data Geekery grants the Customer the non-exclusive, timely limited and
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* non-transferable license to install and use the Software under the terms of
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* the jOOQ License and Maintenance Agreement.
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*
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* This library is distributed with a LIMITED WARRANTY. See the jOOQ License
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* and Maintenance Agreement for more details: http://www.jooq.org/licensing
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*/
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package org.jooq.impl;
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import static java.util.Arrays.asList;
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import static org.jooq.Clause.CONDITION;
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import static org.jooq.Clause.CONDITION_IS_NOT_NULL;
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import static org.jooq.Clause.CONDITION_IS_NULL;
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// ...
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import static org.jooq.SQLDialect.CUBRID;
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// ...
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import static org.jooq.SQLDialect.DERBY;
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import static org.jooq.SQLDialect.FIREBIRD;
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import static org.jooq.SQLDialect.H2;
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// ...
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import static org.jooq.SQLDialect.HSQLDB;
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// ...
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// ...
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import static org.jooq.SQLDialect.MARIADB;
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import static org.jooq.SQLDialect.MYSQL;
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// ...
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import static org.jooq.SQLDialect.SQLITE;
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// ...
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// ...
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import java.util.ArrayList;
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import java.util.List;
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import org.jooq.Clause;
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import org.jooq.Condition;
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import org.jooq.Configuration;
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import org.jooq.Context;
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import org.jooq.Field;
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import org.jooq.Operator;
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import org.jooq.QueryPartInternal;
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import org.jooq.Row;
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/**
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* @author Lukas Eder
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*/
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class RowIsNull extends AbstractCondition {
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/**
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* Generated UID
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*/
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private static final long serialVersionUID = -1806139685201770706L;
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private static final Clause[] CLAUSES_NULL = { CONDITION, CONDITION_IS_NULL };
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private static final Clause[] CLAUSES_NOT_NULL = { CONDITION, CONDITION_IS_NOT_NULL };
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private final Row row;
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private final boolean isNull;
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RowIsNull(Row row, boolean isNull) {
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this.row = row;
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this.isNull = isNull;
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}
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@Override
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public final void accept(Context<?> ctx) {
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delegate(ctx.configuration()).accept(ctx);
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}
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@Override
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public final Clause[] clauses(Context<?> ctx) {
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return delegate(ctx.configuration()).clauses(ctx);
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}
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private final QueryPartInternal delegate(Configuration configuration) {
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// CUBRID 9.0.0 and HSQLDB have buggy implementations of the NULL predicate.
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// Informix doesn't implement the RVE IS NULL predicate.
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if (asList(CUBRID, DERBY, FIREBIRD, H2, HSQLDB, MARIADB, MYSQL, SQLITE).contains(configuration.dialect().family())) {
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List<Condition> conditions = new ArrayList<Condition>();
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for (Field<?> field : row.fields()) {
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conditions.add(isNull ? field.isNull() : field.isNotNull());
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}
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Condition result = new CombinedCondition(Operator.AND, conditions);
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return (QueryPartInternal) result;
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}
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else {
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return new Native();
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}
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}
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private class Native extends AbstractCondition {
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/**
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* Generated UID
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*/
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private static final long serialVersionUID = -2977241780111574353L;
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@Override
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public final void accept(Context<?> ctx) {
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ctx.visit(row)
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.sql(" ")
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.keyword(isNull ? "is null" : "is not null");
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}
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@Override
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public final Clause[] clauses(Context<?> ctx) {
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return isNull ? CLAUSES_NULL : CLAUSES_NOT_NULL;
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}
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}
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} |