comparison: src/main/java/de/uapcore/lightpit/dao/Functions.java
src/main/java/de/uapcore/lightpit/dao/Functions.java
- changeset 47
- 57cfb94ab99f
- child 62
- 833e0385572a
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| 46:1574965c7dc7 | 47:57cfb94ab99f |
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| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * | |
| 4 * Copyright 2018 Mike Becker. All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions are met: | |
| 8 * | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * | |
| 12 * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer in the | |
| 14 * documentation and/or other materials provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 26 * POSSIBILITY OF SUCH DAMAGE. | |
| 27 * | |
| 28 */ | |
| 29 package de.uapcore.lightpit.dao; | |
| 30 | |
| 31 import java.sql.PreparedStatement; | |
| 32 import java.sql.SQLException; | |
| 33 import java.sql.Types; | |
| 34 import java.util.Optional; | |
| 35 import java.util.function.Function; | |
| 36 | |
| 37 /** | |
| 38 * Some DAO utilities. | |
| 39 */ | |
| 40 public final class Functions { | |
| 41 | |
| 42 public static void setStringOrNull(PreparedStatement stmt, int index, String str) throws SQLException { | |
| 43 if (str == null || str.isBlank()) { | |
| 44 stmt.setNull(index, Types.VARCHAR); | |
| 45 } else { | |
| 46 stmt.setString(index, str); | |
| 47 } | |
| 48 } | |
| 49 | |
| 50 public static <T> void setForeignKeyOrNull(PreparedStatement stmt, int index, T instance, Function<? super T, Integer> keyGetter) throws SQLException { | |
| 51 Integer key = Optional.ofNullable(instance).map(keyGetter).orElse(null); | |
| 52 if (key == null) { | |
| 53 stmt.setNull(index, Types.INTEGER); | |
| 54 } else { | |
| 55 stmt.setInt(index, key); | |
| 56 } | |
| 57 } | |
| 58 | |
| 59 private Functions() { | |
| 60 | |
| 61 } | |
| 62 } |
