org.jooq.impl.CaseWhenStepImpl 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 java.util.ArrayList;
import java.util.List;
import org.jooq.CaseWhenStep;
import org.jooq.Clause;
import org.jooq.Configuration;
import org.jooq.Context;
import org.jooq.Field;
import org.jooq.QueryPart;
class CaseWhenStepImpl extends AbstractFunction implements CaseWhenStep {
/**
* Generated UID
*/
private static final long serialVersionUID = -3817194006479624228L;
private final Field value;
private final List> compareValues;
private final List> results;
private Field otherwise;
CaseWhenStepImpl(Field value, Field compareValue, Field result) {
super("case", result.getDataType());
this.value = value;
this.compareValues = new ArrayList>();
this.results = new ArrayList>();
when(compareValue, result);
}
@Override
public final Field otherwise(T result) {
return otherwise(Utils.field(result));
}
@Override
public final Field otherwise(Field result) {
this.otherwise = result;
return this;
}
@Override
public final CaseWhenStep when(V compareValue, T result) {
return when(Utils.field(compareValue), Utils.field(result));
}
@Override
public final CaseWhenStep when(V compareValue, Field result) {
return when(Utils.field(compareValue), result);
}
@Override
public final CaseWhenStep when(Field compareValue, T result) {
return when(compareValue, Utils.field(result));
}
@Override
public final CaseWhenStep when(Field compareValue, Field result) {
compareValues.add(compareValue);
results.add(result);
return this;
}
@Override
final QueryPart getFunction0(Configuration configuration) {
switch (configuration.dialect().family()) {
/* [pro] xx
xxxx xxxxxxx
xxxxxx xxx xxxxxxxxx
xx [/pro] */
default:
return new Native();
}
}
private abstract class Base extends AbstractQueryPart {
/**
* Generated UID
*/
private static final long serialVersionUID = 6146002888421945901L;
@Override
public final Clause[] clauses(Context ctx) {
return null;
}
}
/* [pro] xx
xxxxxxx xxxxx xxxxxx xxxxxxx xxxx x
xxx
x xxxxxxxxx xxx
xx
xxxxxxx xxxxxx xxxxx xxxx xxxxxxxxxxxxxxxx x xxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxx
xxxxxx xxxxx xxxx xxxxxxxxxxxxxxxxx xxxx x
xxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxx
xxx xxxx x x xx x x xxxxxxxxxxxxxxxxxxxxx xxxx x
xx xx x xx x
xxxxxxxxxx xxx
x
xxxxxxxxxxxxxxxx
xxxxxx x xx
xxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxx xx
xxxxxxxxxxxxxxxxxxxxxxx
x
xx xxxxxxxxxx xx xxxxx x
xxxxxxxxxx xx
xxxxxxxxxxxxxxxx
xxxxxxx xx
xxxxxxxxxxxxxxxxxx
x
xxxxxxxxxxxxx
x
x
xx [/pro] */
private class Native extends Base {
/**
* Generated UID
*/
private static final long serialVersionUID = 7564667836130498156L;
@Override
public final void accept(Context ctx) {
ctx.formatIndentLockStart()
.keyword("case");
int size = compareValues.size();
switch (ctx.configuration().dialect()) {
// The DERBY dialect doesn't support the simple CASE clause
case DERBY: {
ctx.formatIndentLockStart();
for (int i = 0; i < size; i++) {
if (i > 0) {
ctx.formatNewLine();
}
ctx.sql(" ").keyword("when").sql(" ");
ctx.visit(value.equal(compareValues.get(i)));
ctx.sql(" ").keyword("then").sql(" ");
ctx.visit(results.get(i));
}
break;
}
default: {
ctx.sql(" ")
.visit(value)
.formatIndentLockStart();
for (int i = 0; i < size; i++) {
if (i > 0) {
ctx.formatNewLine();
}
ctx.sql(" ").keyword("when").sql(" ");
ctx.visit(compareValues.get(i));
ctx.sql(" ").keyword("then").sql(" ");
ctx.visit(results.get(i));
}
break;
}
}
if (otherwise != null) {
ctx.formatNewLine()
.sql(" ").keyword("else").sql(" ").visit(otherwise);
}
ctx.formatIndentLockEnd();
if (size > 1 || otherwise != null) {
ctx.formatSeparator();
}
else {
ctx.sql(" ");
}
ctx.keyword("end")
.formatIndentLockEnd();
}
}
}