org.jooq.impl.InCondition 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 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
*/
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.configuration().dialect().family()) {
/* [pro] xx
xxxx xxxxxxx
xxxx xxxxxxx
xxxx xxxxxxxxxx
xx [/pro] */
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(")");
}
}