org.jooq.impl.DropSequenceImpl 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.DROP_SEQUENCE;
import static org.jooq.Clause.DROP_SEQUENCE_SEQUENCE;
// ...
// ...
import static org.jooq.SQLDialect.CUBRID;
// ...
import static org.jooq.SQLDialect.DERBY;
import static org.jooq.SQLDialect.FIREBIRD;
// ...
// ...
import static org.jooq.impl.DropStatementType.SEQUENCE;
import org.jooq.Clause;
import org.jooq.Configuration;
import org.jooq.Context;
import org.jooq.DropSequenceFinalStep;
import org.jooq.Sequence;
/**
* @author Lukas Eder
*/
class DropSequenceImpl extends AbstractQuery implements
// Cascading interface implementations for DROP SEQUENCE behaviour
DropSequenceFinalStep {
/**
* Generated UID
*/
private static final long serialVersionUID = 8904572826501186329L;
private static final Clause[] CLAUSES = { DROP_SEQUENCE };
private final Sequence sequence;
private final boolean ifExists;
DropSequenceImpl(Configuration configuration, Sequence sequence) {
this(configuration, sequence, false);
}
DropSequenceImpl(Configuration configuration, Sequence sequence, boolean ifExists) {
super(configuration);
this.sequence = sequence;
this.ifExists = ifExists;
}
// ------------------------------------------------------------------------
// XXX: QueryPart API
// ------------------------------------------------------------------------
private final boolean supportsIfExists(Context ctx) {
return !asList(CUBRID, DERBY, FIREBIRD).contains(ctx.family());
}
@Override
public final void accept(Context ctx) {
if (ifExists && !supportsIfExists(ctx)) {
Utils.executeImmediateBegin(ctx, SEQUENCE);
accept0(ctx);
Utils.executeImmediateEnd(ctx, SEQUENCE);
}
else {
accept0(ctx);
}
}
private void accept0(Context ctx) {
ctx.start(DROP_SEQUENCE_SEQUENCE)
.keyword("drop sequence").sql(" ");
if (ifExists && supportsIfExists(ctx))
ctx.keyword("if exists").sql(" ");
ctx.visit(sequence)
.end(DROP_SEQUENCE_SEQUENCE);
}
@Override
public final Clause[] clauses(Context ctx) {
return CLAUSES;
}
}