org.jooq.impl.InCondition Maven / Gradle / Ivy
/**
* Copyright (c) 2009-2016, Data Geekery GmbH (http://www.datageekery.com)
* All rights reserved.
*
* 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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* 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:
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* ASL 2.0 and offer limited warranties, support, maintenance, and commercial
* database integrations.
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* For more information, please visit: http://www.jooq.org/licenses
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package org.jooq.impl;
import static org.jooq.Clause.CONDITION;
import static org.jooq.Clause.CONDITION_IN;
import static org.jooq.Clause.CONDITION_NOT_IN;
import static org.jooq.Comparator.IN;
import static org.jooq.impl.DSL.falseCondition;
import static org.jooq.impl.DSL.trueCondition;
import java.util.Arrays;
import java.util.List;
import org.jooq.Clause;
import org.jooq.Comparator;
import org.jooq.Context;
import org.jooq.Field;
/**
* @author Lukas Eder
*/
final class InCondition extends AbstractCondition {
private static final long serialVersionUID = -1653924248576930761L;
private static final int IN_LIMIT = 1000;
private static final Clause[] CLAUSES_IN = { CONDITION, CONDITION_IN };
private static final Clause[] CLAUSES_IN_NOT = { CONDITION, CONDITION_NOT_IN };
private final Field field;
private final Field[] values;
private final Comparator comparator;
InCondition(Field field, Field[] values, Comparator comparator) {
this.field = field;
this.values = values;
this.comparator = comparator;
}
@Override
public final Clause[] clauses(Context ctx) {
return comparator == IN ? CLAUSES_IN : CLAUSES_IN_NOT;
}
@Override
public final void accept(Context ctx) {
List> list = Arrays.asList(values);
if (list.size() == 0) {
if (comparator == IN)
ctx.visit(falseCondition());
else
ctx.visit(trueCondition());
}
else if (list.size() > IN_LIMIT) {
// [#798] Oracle and some other dialects can only hold 1000 values
// in an IN (...) clause
switch (ctx.family()) {
case FIREBIRD: {
ctx.sql('(')
.formatIndentStart()
.formatNewLine();
for (int i = 0; i < list.size(); i += IN_LIMIT) {
if (i > 0) {
// [#1515] The connector depends on the IN / NOT IN
// operator
if (comparator == Comparator.IN) {
ctx.formatSeparator()
.keyword("or")
.sql(' ');
}
else {
ctx.formatSeparator()
.keyword("and")
.sql(' ');
}
}
toSQLSubValues(ctx, list.subList(i, Math.min(i + IN_LIMIT, list.size())));
}
ctx.formatIndentEnd()
.formatNewLine()
.sql(')');
break;
}
// Most dialects can handle larger lists
default: {
toSQLSubValues(ctx, list);
break;
}
}
}
else {
toSQLSubValues(ctx, list);
}
}
/**
* Render the SQL for a sub-set of the IN clause's values
*/
private void toSQLSubValues(Context ctx, List> subValues) {
ctx.visit(field)
.sql(' ')
.keyword(comparator.toSQL())
.sql(" (");
if (subValues.size() > 1) {
ctx.formatIndentStart()
.formatNewLine();
}
String separator = "";
for (Field value : subValues) {
ctx.sql(separator)
.formatNewLineAfterPrintMargin()
.visit(value);
separator = ", ";
}
if (subValues.size() > 1) {
ctx.formatIndentEnd()
.formatNewLine();
}
ctx.sql(')');
}
}