/*
* 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
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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* See the License for the specific language governing permissions and
* limitations under the License.
*
* Other licenses:
* -----------------------------------------------------------------------------
* Commercial licenses for this work are available. These replace the above
* ASL 2.0 and offer limited warranties, support, maintenance, and commercial
* database integrations.
*
* For more information, please visit: http://www.jooq.org/licenses
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package org.jooq.impl;
import static org.jooq.Clause.TRUNCATE;
import static org.jooq.Clause.TRUNCATE_TRUNCATE;
// ...
import static org.jooq.impl.Keywords.K_CASCADE;
import static org.jooq.impl.Keywords.K_CONTINUE_IDENTITY;
import static org.jooq.impl.Keywords.K_IMMEDIATE;
import static org.jooq.impl.Keywords.K_RESTART_IDENTITY;
import static org.jooq.impl.Keywords.K_RESTRICT;
import static org.jooq.impl.Keywords.K_TRUNCATE_TABLE;
import org.jooq.Clause;
import org.jooq.Configuration;
import org.jooq.Context;
import org.jooq.Record;
import org.jooq.SQLDialect;
import org.jooq.Table;
import org.jooq.TruncateCascadeStep;
import org.jooq.TruncateFinalStep;
import org.jooq.TruncateIdentityStep;
/**
* @author Lukas Eder
*/
final class TruncateImpl<R extends Record> extends AbstractQuery implements
// Cascading interface implementations for Truncate behaviour
TruncateIdentityStep<R> {
/**
* Generated UID
*/
private static final long serialVersionUID = 8904572826501186329L;
private static final Clause[] CLAUSES = { TRUNCATE };
private final Table<R> table;
private Boolean cascade;
private Boolean restartIdentity;
public TruncateImpl(Configuration configuration, Table<R> table) {
super(configuration);
this.table = table;
}
@Override
public final TruncateFinalStep<R> cascade() {
cascade = true;
return this;
}
@Override
public final TruncateFinalStep<R> restrict() {
cascade = false;
return this;
}
@Override
public final TruncateCascadeStep<R> restartIdentity() {
restartIdentity = true;
return this;
}
@Override
public final TruncateCascadeStep<R> continueIdentity() {
restartIdentity = false;
return this;
}
@Override
public final void accept(Context<?> ctx) {
switch (ctx.family()) {
// These dialects don't implement the TRUNCATE statement
case FIREBIRD:
case SQLITE: {
ctx.visit(create(ctx).delete(table));
break;
}
// All other dialects do
default: {
ctx.start(TRUNCATE_TRUNCATE)
.visit(K_TRUNCATE_TABLE).sql(' ')
.visit(table);
if (restartIdentity != null)
ctx.formatSeparator()
.visit(restartIdentity ? K_RESTART_IDENTITY : K_CONTINUE_IDENTITY);
if (cascade != null)
ctx.formatSeparator()
.visit(cascade ? K_CASCADE : K_RESTRICT);
ctx.end(TRUNCATE_TRUNCATE);
break;
}
}
}
@Override
public final Clause[] clauses(Context<?> ctx) {
return CLAUSES;
}
}