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JdbcTemplate: refactoring

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This commit is contained in:
DmitriyMX
2021-01-03 16:00:34 +03:00
parent 5315a4ad94
commit c963c4bd60
3 changed files with 122 additions and 98 deletions
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8
src/main/java/ghast/database/JdbcOperations.java
View File

@@ -9,15 +9,11 @@ public interface JdbcOperations {
<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;
<T> List<T> queryList(String sql, RowMapper<T> rowMapper) throws DataAccessException;
Map<String, Object> queryForMap(String sql) throws DataAccessException;
List<Map<String, Object>> queryForList(String sql) throws DataAccessException;
List<Map<String, Object>> queryForMapList(String sql) throws DataAccessException;
int update(String sql) throws DataAccessException;
int delete(String sql) throws DataAccessException;
}

122
src/main/java/ghast/database/JdbcTemplate.java
View File

@@ -6,17 +6,16 @@ import lombok.NoArgsConstructor;
import lombok.Setter;
import javax.sql.DataSource;
import java.sql.Date;
import java.sql.*;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.*;
@NoArgsConstructor
@Getter
@Setter
public class JdbcTemplate implements JdbcOperations {
private static final String DBG_SQL_INFO = "Execute SQL: {0}";
private DataSource dataSource;
public JdbcTemplate(DataSource dataSource) {
@@ -25,7 +24,7 @@ public class JdbcTemplate implements JdbcOperations {
@Override
public void execute(String sql) throws DataAccessException {
XLog.debug("Execute SQL: {0}", sql);
XLog.debug(DBG_SQL_INFO, sql);
Connection connection = openConnection();
Statement statement = null;
@@ -42,7 +41,7 @@ public class JdbcTemplate implements JdbcOperations {
@Override
public <T> T query(String sql, ResultSetExtractor<T> rse) throws DataAccessException {
XLog.debug("Execute SQL: {0}", sql);
XLog.debug(DBG_SQL_INFO, sql);
Connection connection = openConnection();
Statement statement = null;
@@ -61,71 +60,63 @@ public class JdbcTemplate implements JdbcOperations {
}
@Override
public <T> List<T> query(String sql, final RowMapper<T> rowMapper) throws DataAccessException {
public <T> List<T> queryList(String sql, final RowMapper<T> rowMapper) throws DataAccessException {
return query(sql, rs -> {
List<T> resultList = new ArrayList<>();
List<T> resultList;
int rowNum = 0;
while (rs.next()) {
resultList.add(rowMapper.mapRow(rs, rowNum++));
if (rs.next()) {
resultList = new ArrayList<>();
do {
resultList.add(rowMapper.mapRow(rs, rowNum++));
} while (rs.next());
} else {
resultList = Collections.emptyList();
}
return resultList;
});
}
@Override
public <T> T queryForObject(String sql, RowMapper<T> rowMapper) throws DataAccessException {
public Map<String, Object> queryForMap(String sql) throws DataAccessException {
return query(sql, rs -> {
if (rs.next()) {
T resultObj = rowMapper.mapRow(rs, 0);
ResultSetMetaData metaData = rs.getMetaData();
int columnCount = metaData.getColumnCount();
if (rs.next()) {
throw new IncorrectResultSizeDataAccessException(1);
}
return resultObj;
return rowToMap(columnCount, metaData, rs);
} else {
throw new EmptyResultDataAccessException(1);
return Collections.emptyMap();
}
});
}
@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);
public List<Map<String, Object>> queryForMapList(String sql) throws DataAccessException {
return query(sql, rs -> {
List<Map<String, Object>> resultList;
for (int i = 1; i <= columnCount; i++) {
String key = lookupColumnName(metaData, i);
Object value = getResultSetRawValue(rs, i);
resultMap.put(key, value);
if (rs.next()) {
resultList = new ArrayList<>();
ResultSetMetaData metaData = rs.getMetaData();
int columnCount = metaData.getColumnCount();
do {
resultList.add(rowToMap(columnCount, metaData, rs));
} while (rs.next());
} else {
resultList = Collections.emptyList();
}
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;
return resultList;
});
}
@Override
public int update(String sql) throws DataAccessException {
XLog.debug("Execute SQL: {0}", sql);
XLog.debug(DBG_SQL_INFO, sql);
Connection connection = openConnection();
Statement statement = null;
@@ -143,16 +134,10 @@ public class JdbcTemplate implements JdbcOperations {
}
}
@Override
public int delete(String sql) throws DataAccessException {
return update(sql);
}
private Connection openConnection() {
try {
return getDataSource().getConnection();
}
catch (SQLException ex) {
} catch (SQLException ex) {
throw new CannotGetJdbcConnectionException("Could not get JDBC Connection", ex);
}
}
@@ -165,13 +150,26 @@ public class JdbcTemplate implements JdbcOperations {
return name;
}
private Map<String, Object> rowToMap(int columnCount, ResultSetMetaData metaData, ResultSet rs) throws SQLException {
Map<String, Object> rowMap = new LinkedHashMap<>(columnCount);
for (int i = 1; i <= columnCount; i++) {
String key = lookupColumnName(metaData, i);
Object value = getResultSetRawValue(rs, i);
rowMap.put(key, value);
}
return rowMap;
}
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 == null) {
return null;
}
String className = obj.getClass().getName();
if (obj instanceof Blob) {
Blob blob = (Blob) obj;
obj = blob.getBytes(1, (int) blob.length());
@@ -180,18 +178,16 @@ public class JdbcTemplate implements JdbcOperations {
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")) {
} else if (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 {
} else {
obj = resultSet.getDate(index);
}
} else if (obj instanceof Date) {
if ("java.sql.Timestamp".equals(resultSet.getMetaData().getColumnClassName(index))) {
obj = resultSet.getTimestamp(index);
}
} else if (obj instanceof Date
&& "java.sql.Timestamp".equals(resultSet.getMetaData().getColumnClassName(index))) {
obj = resultSet.getTimestamp(index);
}
return obj;