1.1 --- a/src/main/java/de/uapcore/lightpit/dao/AbstractDao.java Wed May 13 21:46:26 2020 +0200
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,96 +0,0 @@
1.4 -/*
1.5 - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
1.6 - *
1.7 - * Copyright 2018 Mike Becker. All rights reserved.
1.8 - *
1.9 - * Redistribution and use in source and binary forms, with or without
1.10 - * modification, are permitted provided that the following conditions are met:
1.11 - *
1.12 - * 1. Redistributions of source code must retain the above copyright
1.13 - * notice, this list of conditions and the following disclaimer.
1.14 - *
1.15 - * 2. Redistributions in binary form must reproduce the above copyright
1.16 - * notice, this list of conditions and the following disclaimer in the
1.17 - * documentation and/or other materials provided with the distribution.
1.18 - *
1.19 - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
1.20 - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.21 - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.22 - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
1.23 - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.24 - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1.25 - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1.26 - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1.27 - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.28 - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1.29 - * POSSIBILITY OF SUCH DAMAGE.
1.30 - *
1.31 - */
1.32 -package de.uapcore.lightpit.dao;
1.33 -
1.34 -import java.sql.PreparedStatement;
1.35 -import java.sql.ResultSet;
1.36 -import java.sql.SQLException;
1.37 -import java.sql.Types;
1.38 -import java.util.ArrayList;
1.39 -import java.util.List;
1.40 -import java.util.Optional;
1.41 -import java.util.function.Function;
1.42 -
1.43 -public abstract class AbstractDao<T> implements GenericDao<T> {
1.44 -
1.45 - private final PreparedStatement listQuery;
1.46 -
1.47 - protected AbstractDao(PreparedStatement listQuery) {
1.48 - this.listQuery = listQuery;
1.49 - }
1.50 -
1.51 - public final T mapColumns(ResultSet result) throws SQLException {
1.52 - return mapColumns(result, "");
1.53 - }
1.54 -
1.55 - public abstract T mapColumns(ResultSet result, String qualifier) throws SQLException;
1.56 -
1.57 - /**
1.58 - * Qualifies a column label if an qualifier is specified.
1.59 - *
1.60 - * @param qualifier an optional qualifier
1.61 - * @param label the column label
1.62 - * @return the label, qualified if necessary
1.63 - */
1.64 - protected final String qual(String qualifier, String label) {
1.65 - if (qualifier == null || qualifier.isBlank()) {
1.66 - return label;
1.67 - } else {
1.68 - return qualifier + "." + label;
1.69 - }
1.70 - }
1.71 -
1.72 - protected final void setStringOrNull(PreparedStatement stmt, int index, String str) throws SQLException {
1.73 - if (str == null || str.isBlank()) {
1.74 - stmt.setNull(index, Types.VARCHAR);
1.75 - } else {
1.76 - stmt.setString(index, str);
1.77 - }
1.78 - }
1.79 -
1.80 - protected final <T> void setForeignKeyOrNull(PreparedStatement stmt, int index, T instance, Function<? super T, Integer> keyGetter) throws SQLException {
1.81 - Integer key = Optional.ofNullable(instance).map(keyGetter).orElse(null);
1.82 - if (key == null) {
1.83 - stmt.setNull(index, Types.INTEGER);
1.84 - } else {
1.85 - stmt.setInt(index, key);
1.86 - }
1.87 - }
1.88 -
1.89 - @Override
1.90 - public List<T> list() throws SQLException {
1.91 - List<T> list = new ArrayList<>();
1.92 - try (ResultSet result = listQuery.executeQuery()) {
1.93 - while (result.next()) {
1.94 - list.add(mapColumns(result));
1.95 - }
1.96 - }
1.97 - return list;
1.98 - }
1.99 -}
