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/**
* 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.impl.DSL.field;
import static org.jooq.impl.DSL.function;
import static org.jooq.impl.DSL.inline;
import org.jooq.Configuration;
import org.jooq.Field;
/**
* @author Lukas Eder
*/
class Lpad extends AbstractFunction {
/**
* Generated UID
*/
private static final long serialVersionUID = -7273879239726265322L;
private final Field field;
private final Field length;
private final Field character;
Lpad(Field field, Field length) {
this(field, length, null);
}
Lpad(Field field, Field length, Field character) {
super("lpad", SQLDataType.VARCHAR, field, length, character);
this.field = field;
this.length = length;
this.character = (character == null ? inline(" ") : character);
}
@Override
final Field getFunction0(Configuration configuration) {
switch (configuration.dialect().family()) {
/* [pro] xx
xxxx xxxxxxx x
xxxxxx xxxxxxxxxxxxxxxxxxxxxxxx x xxxxxxxxxx x xx xxxx x xxxxx xxxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxx xxxxxxxxxxx
x
xxxx xxxx
xxxx xxxxxxxxxx
xxxx xxxxxxx x
xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx
x
xx [/pro] */
// This beautiful expression was contributed by "Ludo", here:
// http://stackoverflow.com/questions/6576343/how-to-simulate-lpad-rpad-with-sqlite
case SQLITE: {
return DSL.field(
"substr(" +
"replace(" +
"replace(" +
"substr(" +
"quote(" +
"zeroblob((({1} - length({0}) - 1 + length({2})) / length({2}) + 1) / 2)" +
"), 3" +
"), '''', ''" +
"), '0', {2}" +
"), 1, ({1} - length({0}))" +
") || {0}",
String.class,
field, length, character);
}
// According to the Firebird documentation, LPAD outcomes should be
// cast to truncate large results...
case FIREBIRD: {
return field("cast(lpad({0}, {1}, {2}) as varchar(4000))", SQLDataType.VARCHAR, field, length, character);
}
default: {
return function("lpad", SQLDataType.VARCHAR, field, length, character);
}
}
}
}
