150 lines
3.3 KiB
Java
150 lines
3.3 KiB
Java
/*
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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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* https://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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* Other licenses:
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* -----------------------------------------------------------------------------
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* Commercial licenses for this work are available. These replace the above
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* ASL 2.0 and offer limited warranties, support, maintenance, and commercial
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* database integrations.
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*
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* For more information, please visit: https://www.jooq.org/legal/licensing
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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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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// ...
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// ...
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// ...
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// ...
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import static org.jooq.SQLDialect.CLICKHOUSE;
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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.DUCKDB;
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// ...
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import static org.jooq.SQLDialect.FIREBIRD;
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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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// ...
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import static org.jooq.SQLDialect.MYSQL;
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// ...
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// ...
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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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// ...
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import static org.jooq.SQLDialect.TRINO;
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// ...
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import static org.jooq.impl.Keywords.K_IS_NULL;
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import static org.jooq.impl.Tools.allNull;
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import java.util.Set;
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import org.jooq.Clause;
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import org.jooq.Context;
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import org.jooq.Function1;
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import org.jooq.Row;
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import org.jooq.SQLDialect;
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/**
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* @author Lukas Eder
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*/
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final class RowIsNull extends AbstractCondition implements QOM.RowIsNull {
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// Currently not yet supported in SQLite:
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// https://www.sqlite.org/rowvalue.html
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static final Set<SQLDialect> EMULATE_NULL_ROW = SQLDialect.supportedBy(CLICKHOUSE, CUBRID, DERBY, DUCKDB, FIREBIRD, HSQLDB, MARIADB, MYSQL, SQLITE, TRINO);
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private final Row row;
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RowIsNull(Row row) {
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this.row = row;
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}
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@Override
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final boolean isNullable() {
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return false;
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}
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@Override
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public final void accept(Context<?> ctx) {
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if (EMULATE_NULL_ROW.contains(ctx.dialect()))
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ctx.visit(allNull(asList(row.fields())));
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else
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acceptStandard(ctx);
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}
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private final void acceptStandard(Context<?> ctx) {
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ctx.visit(row);
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switch (ctx.family()) {
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default:
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ctx.sql(' ')
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.visit(K_IS_NULL);
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break;
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}
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}
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@Override // Avoid AbstractCondition implementation
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public final Clause[] clauses(Context<?> ctx) {
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return null;
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}
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// -------------------------------------------------------------------------
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// XXX: Query Object Model
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// -------------------------------------------------------------------------
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@Override
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public final Row $arg1() {
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return row;
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}
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@Override
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public final Function1<? super Row, ? extends QOM.RowIsNull> $constructor() {
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return r -> new RowIsNull(r);
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}
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}
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