update version

like Spring Data

build.gradle

@@ -18,6 +18,8 @@ repositories {
 }
 
 ext {
+    junitVersion = '5.5.2'
+
     libs = [
             bukkit: [lib: 'org.bukkit:bukkit:1.12.2-R0.1-SNAPSHOT', exclude: [
                     'com.google.code.gson:gson',
@@ -27,7 +29,17 @@ ext {
             ]],
             commons_text: 'org.apache.commons:commons-text:1.9',
             lombok: 'org.projectlombok:lombok:1.18.12',
-            reflection_object: 'ru.dmitriymx:reflection-object:1.0-BETA'
+            reflection_object: 'ru.dmitriymx:reflection-object:1.0-BETA',
+            mysql: 'mysql:mysql-connector-java:8.0.22',
+            test: [
+                    junit5: [
+                            "org.junit.jupiter:junit-jupiter-api:$junitVersion",
+                            "org.junit.jupiter:junit-jupiter-engine:$junitVersion"
+                    ],
+                    mock: ['org.mockito:mockito-core:1.10.19'],
+                    h2db: 'com.h2database:h2:1.4.200'
+            ]
+
     ]
 }
 
@@ -40,11 +52,30 @@ def compileOnly2(library) {
     }
 }
 
+def testImplementation2(library) {
+    dependencies.testImplementation library.lib, {
+        library.exclude.each { String excludeLibStr ->
+            String[] excludeLib = excludeLibStr.split(':')
+            exclude group: excludeLib[0], module: excludeLib[1]
+        }
+    }
+}
+
 dependencies {
     compileOnly libs.lombok
     annotationProcessor libs.lombok
 
     compileOnly2 libs.bukkit
+    compileOnly libs.mysql
     implementation libs.commons_text
     implementation libs.reflection_object
+
+    testImplementation libs.test.junit5
+    testImplementation libs.test.mock
+    testImplementation2 libs.bukkit
+    testImplementation libs.test.h2db
+}
+
+test {
+    useJUnitPlatform()
 }

gradle.properties

@@ -1,3 +1,3 @@
 projectGroup=ghast
 projectName=ghast-tools
-projectVersion=1.8
+projectVersion=1.9

src/main/java/ghast/GhastTools.java

@@ -1,5 +1,6 @@
 package ghast;
 
+import ghast.assets.AssetsManager;
 import lombok.experimental.UtilityClass;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.plugin.Plugin;

src/main/java/ghast/assets/AssetsException.java

@@ -1,4 +1,4 @@
-package ghast;
+package ghast.assets;
 
 public class AssetsException extends RuntimeException {
 

src/main/java/ghast/assets/AssetsManager.java

@@ -1,5 +1,6 @@
-package ghast;
+package ghast.assets;
 
+import ghast.GhastTools;
 import lombok.experimental.UtilityClass;
 import org.bukkit.plugin.Plugin;
 

src/main/java/ghast/database/CannotGetJdbcConnectionException.java

@@ -0,0 +1,10 @@
+package ghast.database;
+
+import java.sql.SQLException;
+
+public class CannotGetJdbcConnectionException extends DataAccessException {
+
+	public CannotGetJdbcConnectionException(String msg, SQLException ex) {
+		super(msg, ex);
+	}
+}

src/main/java/ghast/database/DataAccessException.java

@@ -0,0 +1,28 @@
+package ghast.database;
+
+import lombok.Getter;
+
+@SuppressWarnings("java:S1165")
+@Getter
+public class DataAccessException extends RuntimeException {
+
+	private String sql;
+
+	public DataAccessException(String msg) {
+		super(msg);
+	}
+
+	public DataAccessException(String msg, String sql) {
+		this(msg);
+		this.sql = sql;
+	}
+
+	public DataAccessException(String msg, Throwable cause) {
+		super(msg, cause);
+	}
+
+	public DataAccessException(String msg, String sql, Throwable cause) {
+		this(msg, cause);
+		this.sql = sql;
+	}
+}

src/main/java/ghast/database/EmptyResultDataAccessException.java

@@ -0,0 +1,8 @@
+package ghast.database;
+
+public class EmptyResultDataAccessException extends IncorrectResultSizeDataAccessException {
+
+	public EmptyResultDataAccessException(int expectedSize) {
+		super(expectedSize);
+	}
+}

src/main/java/ghast/database/IncorrectResultSizeDataAccessException.java

@@ -0,0 +1,8 @@
+package ghast.database;
+
+public class IncorrectResultSizeDataAccessException extends DataAccessException {
+
+	public IncorrectResultSizeDataAccessException(int expectedSize) {
+		super("Incorrect result size: expected " + expectedSize);
+	}
+}

src/main/java/ghast/database/JdbcOperations.java

@@ -0,0 +1,23 @@
+package ghast.database;
+
+import java.util.List;
+import java.util.Map;
+
+public interface JdbcOperations {
+
+	void execute(String sql) throws DataAccessException;
+
+	<T> T query(String sql, ResultSetExtractor<T> rse) throws DataAccessException;
+
+	<T> List<T> query(String sql, RowMapper<T> rowMapper) throws DataAccessException;
+
+	<T> T queryForObject(String sql, RowMapper<T> rowMapper) throws DataAccessException;
+
+	Map<String, Object> queryForMap(String sql) throws DataAccessException;
+
+	List<Map<String, Object>> queryForList(String sql) throws DataAccessException;
+
+	int update(String sql) throws DataAccessException;
+
+	int delete(String sql) throws DataAccessException;
+}

src/main/java/ghast/database/JdbcTemplate.java

@@ -0,0 +1,237 @@
+package ghast.database;
+
+import ghast.XLog;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import javax.sql.DataSource;
+import java.sql.*;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+@NoArgsConstructor
+@Getter
+@Setter
+public class JdbcTemplate implements JdbcOperations {
+
+	private DataSource dataSource;
+
+	public JdbcTemplate(DataSource dataSource) {
+		setDataSource(dataSource);
+	}
+
+	@Override
+	public void execute(String sql) throws DataAccessException {
+		XLog.debug("Execute SQL: {0}", sql);
+
+		Connection connection = openConnection();
+		Statement statement = null;
+		try {
+			statement = connection.createStatement();
+			statement.execute(sql);
+		} catch (SQLException e) {
+			throw new DataAccessException("Error execute SQL", sql, e);
+		} finally {
+			closeStatement(statement);
+			closeConnection(connection);
+		}
+	}
+
+	@Override
+	public <T> T query(String sql, ResultSetExtractor<T> rse) throws DataAccessException {
+		XLog.debug("Execute SQL: {0}", sql);
+
+		Connection connection = openConnection();
+		Statement statement = null;
+		ResultSet resultSet = null;
+		try {
+			statement = connection.createStatement();
+			resultSet = statement.executeQuery(sql);
+			return rse.extractData(resultSet);
+		} catch (SQLException e) {
+			throw new DataAccessException("Error execute SQL", sql, e);
+		} finally {
+			closeResultSet(resultSet);
+			closeStatement(statement);
+			closeConnection(connection);
+		}
+	}
+
+	@Override
+	public <T> List<T> query(String sql, final RowMapper<T> rowMapper) throws DataAccessException {
+		return query(sql, rs -> {
+			List<T> resultList = new ArrayList<>();
+			int rowNum = 0;
+			while (rs.next()) {
+				resultList.add(rowMapper.mapRow(rs, rowNum++));
+			}
+			return resultList;
+		});
+	}
+
+	@Override
+	public <T> T queryForObject(String sql, RowMapper<T> rowMapper) throws DataAccessException {
+		return query(sql, rs -> {
+			if (rs.next()) {
+				T resultObj = rowMapper.mapRow(rs, 0);
+
+				if (rs.next()) {
+					throw new IncorrectResultSizeDataAccessException(1);
+				}
+
+				return resultObj;
+			} else {
+				throw new EmptyResultDataAccessException(1);
+			}
+		});
+	}
+
+	@Override
+	public Map<String, Object> queryForMap(String sql) throws DataAccessException {
+		return queryForObject(sql, (rs, rowNum) -> {
+			ResultSetMetaData metaData = rs.getMetaData();
+			int columnCount = metaData.getColumnCount();
+			Map<String, Object> resultMap = new LinkedHashMap<>(columnCount);
+
+			for (int i = 1; i <= columnCount; i++) {
+				String key = lookupColumnName(metaData, i);
+				Object value = getResultSetRawValue(rs, i);
+				resultMap.put(key, value);
+			}
+
+			return resultMap;
+		});
+	}
+
+	@Override
+	public List<Map<String, Object>> queryForList(String sql) throws DataAccessException {
+		return query(sql, (rs, rowNum) -> {
+			ResultSetMetaData metaData = rs.getMetaData();
+			int columnCount = metaData.getColumnCount();
+			Map<String, Object> resultMap = new LinkedHashMap<>(columnCount);
+
+			for (int i = 1; i <= columnCount; i++) {
+				String key = lookupColumnName(metaData, i);
+				Object value = getResultSetRawValue(rs, i);
+				resultMap.put(key, value);
+			}
+
+			return resultMap;
+		});
+	}
+
+	@Override
+	public int update(String sql) throws DataAccessException {
+		XLog.debug("Execute SQL: {0}", sql);
+
+		Connection connection = openConnection();
+		Statement statement = null;
+		try {
+			statement = connection.createStatement();
+			int rows = statement.executeUpdate(sql);
+			XLog.debug("Affected {0} rows", rows);
+			return rows;
+		} catch (SQLException e) {
+			XLog.error("Error execute SQL: {0}", e.getMessage(), e);
+			return 0;
+		} finally {
+			closeStatement(statement);
+			closeConnection(connection);
+		}
+	}
+
+	@Override
+	public int delete(String sql) throws DataAccessException {
+		return update(sql);
+	}
+
+	private Connection openConnection() {
+		try {
+			return getDataSource().getConnection();
+		}
+		catch (SQLException ex) {
+			throw new CannotGetJdbcConnectionException("Could not get JDBC Connection", ex);
+		}
+	}
+
+	private String lookupColumnName(ResultSetMetaData resultSetMetaData, int columnIndex) throws SQLException {
+		String name = resultSetMetaData.getColumnLabel(columnIndex);
+		if (name == null || name.isEmpty()) {
+			name = resultSetMetaData.getColumnName(columnIndex);
+		}
+		return name;
+	}
+
+	private Object getResultSetRawValue(ResultSet resultSet, int index) throws SQLException {
+		Object obj = resultSet.getObject(index);
+		String className = null;
+		if (obj != null) {
+			className = obj.getClass().getName();
+		}
+
+		if (obj instanceof Blob) {
+			Blob blob = (Blob) obj;
+			obj = blob.getBytes(1, (int) blob.length());
+		} else if (obj instanceof Clob) {
+			Clob clob = (Clob) obj;
+			obj = clob.getSubString(1, (int) clob.length());
+		} else if ("oracle.sql.TIMESTAMP".equals(className) || "oracle.sql.TIMESTAMPTZ".equals(className)) {
+			obj = resultSet.getTimestamp(index);
+		} else if (className != null && className.startsWith("oracle.sql.DATE")) {
+			String metaDataClassName = resultSet.getMetaData().getColumnClassName(index);
+			if ("java.sql.Timestamp".equals(metaDataClassName) || "oracle.sql.TIMESTAMP".equals(metaDataClassName)) {
+				obj = resultSet.getTimestamp(index);
+			}
+			else {
+				obj = resultSet.getDate(index);
+			}
+		} else if (obj instanceof Date) {
+			if ("java.sql.Timestamp".equals(resultSet.getMetaData().getColumnClassName(index))) {
+				obj = resultSet.getTimestamp(index);
+			}
+		}
+
+		return obj;
+	}
+
+	private void closeResultSet(ResultSet resultSet) {
+		if (resultSet != null) {
+			try {
+				resultSet.close();
+			} catch (SQLException e) {
+				XLog.debug("Could not close JDBC ResultSet", e);
+			} catch (Exception e) {
+				XLog.debug("Unexpected exception on closing JDBC ResultSet", e);
+			}
+		}
+	}
+
+	private void closeStatement(Statement statement) {
+		if (statement != null) {
+			try {
+				statement.close();
+			} catch (SQLException e) {
+				XLog.debug("Could not close JDBC Statement", e);
+			} catch (Exception e) {
+				XLog.debug("Unexpected exception on closing JDBC Statement", e);
+			}
+		}
+	}
+
+	private void closeConnection(Connection con) {
+		if (con == null) {
+			return;
+		}
+
+		try {
+			con.close();
+		} catch (SQLException e) {
+			XLog.debug("Could not close JDBC Connection", e);
+		} catch (Exception e) {
+			XLog.debug("Unexpected exception on closing JDBC Connection", e);
+		}
+	}
+}

src/main/java/ghast/database/ResultSetExtractor.java

@@ -0,0 +1,9 @@
+package ghast.database;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public interface ResultSetExtractor<T> {
+
+	T extractData(ResultSet rs) throws SQLException, DataAccessException;
+}

src/main/java/ghast/database/RowMapper.java

@@ -0,0 +1,9 @@
+package ghast.database;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public interface RowMapper<T> {
+
+	T mapRow(ResultSet rs, int rowNum) throws SQLException;
+}

src/main/java/ghast/scheduler/BukkitScheduleTask.java

@@ -3,18 +3,31 @@ package ghast.scheduler;
 import lombok.RequiredArgsConstructor;
 import org.bukkit.scheduler.BukkitTask;
 
+import java.util.function.Supplier;
+
 @RequiredArgsConstructor
 public class BukkitScheduleTask implements ScheduleTask {
 
-	private final BukkitTask bukkitTask;
+	private final Supplier<BukkitTask> generator;
+	private BukkitTask bukkitTask;
+
+	@Override
+	public void start() {
+		if (isCanceled()) {
+			bukkitTask = generator.get();
+		}
+	}
 
 	@Override
 	public boolean isCanceled() {
-		return bukkitTask.isCancelled();
+		return bukkitTask == null || bukkitTask.isCancelled();
 	}
 
 	@Override
 	public void cancel() {
+		if (bukkitTask != null) {
 			bukkitTask.cancel();
+			bukkitTask = null;
+		}
 	}
 }

src/main/java/ghast/scheduler/JavaScheduleTask.java

@@ -3,19 +3,31 @@ package ghast.scheduler;
 import lombok.RequiredArgsConstructor;
 
 import java.util.concurrent.Future;
+import java.util.function.Supplier;
 
 @RequiredArgsConstructor
 public class JavaScheduleTask implements ScheduleTask {
 
-	private final Future<?> future;
+	private final Supplier<Future<?>> generator;
+	private Future<?> future;
+
+	@Override
+	public void start() {
+		if (future == null || future.isDone()) {
+			future = generator.get();
+		}
+	}
 
 	@Override
 	public boolean isCanceled() {
-		return future.isCancelled();
+		return future == null || future.isCancelled();
 	}
 
 	@Override
 	public void cancel() {
+		if (future != null) {
 			future.cancel(true);
+			future = null;
+		}
 	}
 }

src/main/java/ghast/scheduler/ScheduleManager.java

@@ -7,7 +7,6 @@ import lombok.NoArgsConstructor;
 import lombok.experimental.UtilityClass;
 import org.bukkit.Bukkit;
 import org.bukkit.scheduler.BukkitScheduler;
-import org.bukkit.scheduler.BukkitTask;
 
 import java.util.concurrent.*;
 
@@ -47,7 +46,7 @@ public class ScheduleManager {
 			return this;
 		}
 
-		public ScheduleTask execute(Runnable runnable) {
+		public ScheduleTask create(Runnable runnable) {
 			if (useBukkitScheduler) {
 				return createBukkitSchedule(runnable);
 			} else {
@@ -55,23 +54,27 @@ public class ScheduleManager {
 			}
 		}
 
+		public ScheduleTask execute(Runnable runnable) {
+			ScheduleTask scheduleTask = create(runnable);
+			scheduleTask.start();
+			return scheduleTask;
+		}
+
 		private ScheduleTask createBukkitSchedule(Runnable runnable) {
 			BukkitScheduler bukkitScheduler = Bukkit.getScheduler();
 			BukkitScheduleTask resultTask;
 
 			if (this.afterMs == null && this.everyMs == null) {
-				BukkitTask bukkitTask = bukkitScheduler.runTask(GhastTools.getPlugin(), runnable);
-				resultTask = new BukkitScheduleTask(bukkitTask);
+				resultTask = new BukkitScheduleTask(() -> bukkitScheduler.runTask(GhastTools.getPlugin(), runnable));
 			} else if (this.everyMs != null) {
 				long everyTicks = this.everyMs / MS_PER_ONE_TICK;
 				long afterTicks = this.afterMs != null ? this.afterMs / MS_PER_ONE_TICK : 0;
-				BukkitTask bukkitTask = bukkitScheduler.runTaskTimer(GhastTools.getPlugin(), runnable, afterTicks,
-						everyTicks);
-				resultTask = new BukkitScheduleTask(bukkitTask);
+				resultTask = new BukkitScheduleTask(() ->
+						bukkitScheduler.runTaskTimer(GhastTools.getPlugin(), runnable, afterTicks, everyTicks));
 			} else {
 				long ticks = this.afterMs / MS_PER_ONE_TICK;
-				BukkitTask bukkitTask = bukkitScheduler.runTaskLater(GhastTools.getPlugin(), runnable, ticks);
-				resultTask = new BukkitScheduleTask(bukkitTask);
+				resultTask = new BukkitScheduleTask(() ->
+						bukkitScheduler.runTaskLater(GhastTools.getPlugin(), runnable, ticks));
 			}
 
 			return resultTask;
@@ -83,24 +86,23 @@ public class ScheduleManager {
 
 			if (this.afterMs == null && this.everyMs == null) {
 				executorService = Executors.newSingleThreadExecutor(THREAD_FACTORY);
-				Future<?> future = executorService.submit(runnable);
-				resultTask = new JavaScheduleTask(future);
+				resultTask = new JavaScheduleTask(() -> executorService.submit(runnable));
 			} else if (this.everyMs != null) {
 				ScheduledExecutorService scheduledExecutorService
 						= Executors.newScheduledThreadPool(1, THREAD_FACTORY);
-				ScheduledFuture<?> scheduledFuture = scheduledExecutorService.scheduleAtFixedRate(runnable,
-						this.afterMs != null ? this.afterMs : 0,
-						everyMs, TimeUnit.MILLISECONDS);
 
-				resultTask = new JavaScheduleTask(scheduledFuture);
+				resultTask = new JavaScheduleTask(() ->
+						scheduledExecutorService.scheduleAtFixedRate(runnable,
+								this.afterMs != null ? this.afterMs : 0,
+								everyMs, TimeUnit.MILLISECONDS));
+
 				executorService = scheduledExecutorService;
 			} else {
 				ScheduledExecutorService scheduledExecutorService
 						= Executors.newScheduledThreadPool(1, THREAD_FACTORY);
-				ScheduledFuture<?> schedule = scheduledExecutorService
-						.schedule(runnable, afterMs, TimeUnit.MILLISECONDS);
 
-				resultTask = new JavaScheduleTask(schedule);
+				resultTask = new JavaScheduleTask(() ->
+						scheduledExecutorService.schedule(runnable, afterMs, TimeUnit.MILLISECONDS));
 				executorService = scheduledExecutorService;
 			}
 

src/main/java/ghast/scheduler/ScheduleTask.java

@@ -2,6 +2,8 @@ package ghast.scheduler;
 
 public interface ScheduleTask {
 
+	void start();
+
 	boolean isCanceled();
 
 	void cancel();

src/test/java/ghast/database/JdbcTemplateTest.java

@@ -0,0 +1,245 @@
+package ghast.database;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Lists;
+import ghast.GhastTools;
+import org.apache.commons.lang3.builder.EqualsBuilder;
+import org.apache.commons.lang3.builder.HashCodeBuilder;
+import org.bukkit.plugin.Plugin;
+import org.h2.jdbcx.JdbcDataSource;
+import org.junit.jupiter.api.*;
+
+import javax.sql.DataSource;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.text.MessageFormat;
+import java.util.List;
+import java.util.Map;
+import java.util.StringJoiner;
+import java.util.logging.Logger;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+class JdbcTemplateTest {
+
+	static final String JDBC_USER = "sa";
+	static final String JDBC_PASSWORD = "";
+	static final String JDBC_DB_NAME = "in_mem_db";
+	static final String JDBC_URL = "jdbc:h2:mem:" + JDBC_DB_NAME + ";DB_CLOSE_DELAY=-1";
+
+	static final String TABLE_NAME = "TEST_TABLE";
+	static final String COLUMN_ID = "ID";
+	static final String COLUMN_NAME = "C_NAME";
+	static final String COLUMN_VALUE = "C_VALUE";
+
+	static final Object[][] DATA = new Object[][]{
+			{ "Player 1", 100 }, { "Player 2", 250 },
+			{ "Player 3", 0 }, { "Player 4", 780 }
+	};
+
+	static DataSource dataSource;
+	JdbcTemplate jdbcTemplate;
+
+	@BeforeAll
+	static void beforeAll() {
+		Logger logger = Logger.getLogger(JdbcTemplateTest.class.getName());
+
+		Plugin mockPlugin = mock(Plugin.class);
+		when(mockPlugin.getLogger()).thenReturn(logger);
+
+		GhastTools.setPlugin(mockPlugin);
+
+		JdbcDataSource jdbcDataSource = new JdbcDataSource();
+		jdbcDataSource.setUser(JDBC_USER);
+		jdbcDataSource.setPassword(JDBC_PASSWORD);
+		jdbcDataSource.setURL(JDBC_URL);
+
+		dataSource = jdbcDataSource;
+	}
+
+	@BeforeEach
+	void before() {
+		jdbcTemplate = new JdbcTemplate(dataSource);
+		createTable();
+
+		String sql_head = MessageFormat.format("INSERT INTO {0} ({1}, {2}) VALUES ",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE);
+		StringJoiner sql_sj = new StringJoiner(", ");
+		for (Object[] datum : DATA) {
+			sql_sj.add(MessageFormat.format("( ''{0}'', {1} )", datum[0], datum[1]));
+		}
+
+		jdbcTemplate.execute(sql_head + sql_sj.toString());
+	}
+
+	@AfterEach
+	void after() {
+		dropTable();
+	}
+
+	@Test
+	void testQuery_Single() {
+		String sql = MessageFormat.format("SELECT {2} FROM {0} WHERE {1} LIKE ''{3}''",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE, DATA[0][0]);
+
+		Integer value = jdbcTemplate.query(sql, rs -> {
+			if (rs.next()) {
+				return rs.getInt(1);
+			} else {
+				return null;
+			}
+		});
+
+		assertEquals(DATA[0][1], value);
+	}
+
+	@Test
+	void testQuery_List() {
+		String sql = MessageFormat.format("SELECT {2} FROM {0} WHERE {1} LIKE ''{3}'' OR {1} LIKE ''{4}''",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE, DATA[0][0], DATA[1][0]);
+
+		List<Integer> listValues = jdbcTemplate.query(sql, (rs, rowNum) -> rs.getInt(1));
+
+		assertIterableEquals(Lists.newArrayList(DATA[0][1], DATA[1][1]), listValues);
+	}
+
+	@Test
+	void testQueryForObject() {
+		class Player {
+			String name;
+			int value;
+
+			@Override
+			public boolean equals(Object o) {
+				if (this == o) return true;
+				if (!(o instanceof Player)) return false;
+				Player player = (Player) o;
+				return new EqualsBuilder().append(value, player.value).append(name, player.name).isEquals();
+			}
+
+			@Override
+			public int hashCode() {
+				return new HashCodeBuilder(17, 37).append(name).append(value).toHashCode();
+			}
+		}
+
+		String sql = MessageFormat.format("SELECT {1}, {2} FROM {0} WHERE {1} LIKE ''{3}''",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE, DATA[0][0]);
+
+		Player actualPlayer = jdbcTemplate.queryForObject(sql, (rs, rowNum) -> {
+			Player player0 = new Player();
+			player0.name = rs.getString(COLUMN_NAME);
+			player0.value = rs.getInt(COLUMN_VALUE);
+
+			return player0;
+		});
+
+		Player expectedPlayer = new Player();
+		expectedPlayer.name = (String) DATA[0][0];
+		expectedPlayer.value = (int) DATA[0][1];
+
+		assertEquals(expectedPlayer, actualPlayer);
+	}
+
+	@Test
+	void testQueryForMap() {
+		String sql = MessageFormat.format("SELECT {1}, {2} FROM {0} WHERE {1} LIKE ''{3}''",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE, DATA[0][0]);
+
+		Map<String, Object> actualMap = jdbcTemplate.queryForMap(sql);
+
+		Map<String, Object> expectedMap = ImmutableMap.of(
+				COLUMN_NAME, DATA[0][0],
+				COLUMN_VALUE, DATA[0][1]);
+
+		assertIterableEquals(expectedMap.entrySet(), actualMap.entrySet());
+	}
+
+	@Test
+	void testQueryForList() {
+		String sql = MessageFormat.format("SELECT {1}, {2} FROM {0}",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE);
+
+		List<Map<String, Object>> actualMapList = jdbcTemplate.queryForList(sql);
+
+		List<Map<String, Object>> expectedMapList = Stream.of(DATA)
+				.map(datum -> ImmutableMap.of(COLUMN_NAME, datum[0], COLUMN_VALUE, datum[1]))
+				.collect(Collectors.toList());
+
+		assertIterableEquals(expectedMapList, actualMapList);
+
+	}
+
+	@Test
+	void testUpdate() {
+		String newName = "Player X";
+		String sql = MessageFormat.format("UPDATE {0} SET {1} = ''{3}'' WHERE {1} LIKE ''{2}''",
+				TABLE_NAME, COLUMN_NAME, DATA[0][0], newName);
+
+		int rows = jdbcTemplate.update(sql);
+
+		assertEquals(1, rows);
+
+		sql = MessageFormat.format("SELECT {2} FROM {0} WHERE {1} LIKE ''{3}''",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE, newName);
+
+		Integer value = jdbcTemplate.query(sql, rs -> {
+			if (rs.next()) {
+				return rs.getInt(1);
+			} else {
+				return null;
+			}
+		});
+
+		assertEquals(DATA[0][1], value);
+	}
+
+	private void createTable() {
+		jdbcTemplate.execute("CREATE TABLE " + TABLE_NAME + " (" +
+				COLUMN_ID + " bigint auto_increment," +
+				COLUMN_NAME + " varchar(16)," +
+				COLUMN_VALUE + " integer)");
+	}
+
+	private void dropTable() {
+		jdbcTemplate.execute("DROP TABLE IF EXISTS " + TABLE_NAME);
+	}
+
+	@Nested
+	class JdbcTemplateTest_ExecuteTestCase {
+
+		@BeforeEach
+		void before() {
+			jdbcTemplate = new JdbcTemplate(dataSource);
+			dropTable();
+		}
+
+		@AfterEach
+		void after() {
+			dropTable();
+		}
+
+		@Test
+		void test() throws ClassNotFoundException, IllegalAccessException, InstantiationException, SQLException {
+			createTable();
+
+			//region Check result
+			Class.forName("org.h2.Driver").newInstance();
+			Connection connection = DriverManager.getConnection(JDBC_URL, JDBC_USER, JDBC_PASSWORD);
+			ResultSet resultSet = connection.getMetaData().getTables(JDBC_DB_NAME.toUpperCase(), "PUBLIC",
+					TABLE_NAME.toUpperCase(), new String[]{"TABLE"});
+
+			assertTrue(resultSet.next());
+
+			resultSet.close();
+			connection.close();
+			//endregion
+		}
+	}
+}