LightPIT: src/main/java/de/uapcore/lightpit/dao/AbstractDao.java@e722861558bb (annotated)

src/main/java/de/uapcore/lightpit/dao/AbstractDao.java@e722861558bb (annotated)

src/main/java/de/uapcore/lightpit/dao/AbstractDao.java

Tue, 12 May 2020 22:03:00 +0200

author: Mike Becker <universe@uap-core.de>
date: Tue, 12 May 2020 22:03:00 +0200
changeset 39: e722861558bb
parent 38: cf85ef18f231
child 40: 276ef00a336d
permissions: -rw-r--r--

fixes minor issues that were reported by default inspection

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
  * Copyright 2018 Mike Becker. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *   1. Redistributions of source code must retain the above copyright
  *      notice, this list of conditions and the following disclaimer.
  *
  *   2. Redistributions in binary form must reproduce the above copyright
  *      notice, this list of conditions and the following disclaimer in the
  *      documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  *
  */
 package de.uapcore.lightpit.dao;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Types;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
 import java.util.function.Function;
 public abstract class AbstractDao<T> implements GenericDao<T> {
     private final PreparedStatement listQuery;
     protected AbstractDao(PreparedStatement listQuery) {
         this.listQuery = listQuery;
     }
     public final T mapColumns(ResultSet result) throws SQLException {
         return mapColumns(result, "");
     }
     public abstract T mapColumns(ResultSet result, String qualifier) throws SQLException;
     /**
      * Qualifies a column label if an qualifier is specified.
      *
      * @param qualifier an optional qualifier
      * @param label     the column label
      * @return the label, qualified if necessary
      */
     protected final String qual(String qualifier, String label) {
         if (qualifier == null || qualifier.isBlank()) {
             return label;
         } else {
             return qualifier + "." + label;
         }
     }
     protected final void setStringOrNull(PreparedStatement stmt, int index, String str) throws SQLException {
         if (str == null || str.isBlank()) {
             stmt.setNull(index, Types.VARCHAR);
         } else {
             stmt.setString(index, str);
         }
     }
     protected final void setForeignKeyOrNull(PreparedStatement stmt, int index, Object instance, Function<Object, Integer> keyGetter) throws SQLException {
         Integer key = Optional.ofNullable(instance).map(keyGetter).orElse(null);
         if (key == null) {
             stmt.setNull(index, Types.INTEGER);
         } else {
             stmt.setInt(index, key);
         }
     }
     @Override
     public List<T> list() throws SQLException {
         List<T> list = new ArrayList<>();
         try (ResultSet result = listQuery.executeQuery()) {
             while (result.next()) {
                 list.add(mapColumns(result));
             }
         }
         return list;
     }
 }

Mercurial > hg > LightPIT / annotate

src/main/java/de/uapcore/lightpit/dao/AbstractDao.java@e722861558bb (annotated)

src/main/java/de/uapcore/lightpit/dao/AbstractDao.java