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Utilities for handling providence messages using jdbi v3.
/*
* Copyright 2018-2019 Providence Authors
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package net.morimekta.providence.jdbi.v3;
import net.morimekta.providence.PMessage;
import net.morimekta.providence.PMessageBuilder;
import net.morimekta.providence.descriptor.PEnumDescriptor;
import net.morimekta.providence.descriptor.PField;
import net.morimekta.providence.descriptor.PMessageDescriptor;
import net.morimekta.providence.serializer.BinarySerializer;
import net.morimekta.providence.serializer.JsonSerializer;
import net.morimekta.util.Binary;
import net.morimekta.util.collect.UnmodifiableMap;
import net.morimekta.util.io.IOUtils;
import org.jdbi.v3.core.mapper.RowMapper;
import org.jdbi.v3.core.result.ResultSetException;
import org.jdbi.v3.core.statement.StatementContext;
import javax.annotation.Nonnull;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.io.StringReader;
import java.io.UncheckedIOException;
import java.sql.Blob;
import java.sql.Clob;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.sql.Types;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.TimeZone;
/**
* Map a result set to a message based on meta information and the message
* descriptor.
*
* @param The message type.
*/
public class MessageRowMapper> implements RowMapper {
private static final Calendar UTC = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
public static final String ALL_FIELDS = "*";
/**
* Create a message row mapper.
*
* @param descriptor Message descriptor.
*/
public MessageRowMapper(@Nonnull PMessageDescriptor descriptor) {
this(descriptor, UnmodifiableMap.mapOf());
}
/**
* Create a message row mapper.
*
* @param tableName The name of the table to filter fields for this mapper.
* @param descriptor Message descriptor.
*/
public MessageRowMapper(@Nonnull String tableName, @Nonnull PMessageDescriptor descriptor) {
this(tableName, descriptor, UnmodifiableMap.mapOf());
}
/**
* Create a message row mapper.
*
* @param descriptor Message descriptor.
* @param fieldMapping The field mapping. If empty will map all fields with default names.
*/
public MessageRowMapper(@Nonnull PMessageDescriptor descriptor,
@Nonnull Map> fieldMapping) {
this("", descriptor, fieldMapping);
}
/**
* Create a message row mapper.
*
* @param tableName The name of the table to filter fields for this mapper.
* @param descriptor Message descriptor.
* @param fieldMapping The field mapping. If empty will map all fields with default names.
*/
public MessageRowMapper(@Nonnull String tableName,
@Nonnull PMessageDescriptor descriptor,
@Nonnull Map> fieldMapping) {
Map> mappingBuilder = new HashMap<>();
if (fieldMapping.isEmpty()) {
for (PField field : descriptor.getFields()) {
mappingBuilder.put(field.getName().toUpperCase(Locale.US), field);
}
} else {
fieldMapping.forEach((name, addField) -> {
if (ALL_FIELDS.equals(name)) {
for (PField field : descriptor.getFields()) {
String fieldName = field.getName().toUpperCase(Locale.US);
// To avoid overwriting already specified fields.
if (!mappingBuilder.containsKey(fieldName)) {
mappingBuilder.put(fieldName, field);
}
}
} else {
mappingBuilder.put(name.toUpperCase(Locale.US), addField);
}
});
}
this.tableName = tableName;
this.descriptor = descriptor;
this.fieldNameMapping = UnmodifiableMap.copyOf(mappingBuilder);
}
@Override
public String toString() {
return getClass().getSimpleName() + "{type=" +
descriptor.getQualifiedName() +
(tableName == null ? "" : ", tableName=" + tableName) + "}";
}
@Override
public M map(ResultSet rs, StatementContext ctx) throws SQLException {
PMessageBuilder builder = descriptor.builder();
for (int i = 1; i <= rs.getMetaData().getColumnCount(); ++i) {
if (!tableName.isEmpty() &&
!tableName.equalsIgnoreCase(rs.getMetaData().getTableName(i))) {
continue;
}
String name = rs.getMetaData().getColumnLabel(i).toUpperCase(Locale.US);
PField field = fieldNameMapping.get(name);
if (field != null) {
int columnType = rs.getMetaData().getColumnType(i);
switch (field.getType()) {
case BOOL: {
if (columnType == Types.BOOLEAN || columnType == Types.BIT) {
boolean b = rs.getBoolean(i);
if (!rs.wasNull()) {
builder.set(field, b);
}
} else {
int b = rs.getInt(i);
if (!rs.wasNull()) {
builder.set(field, b != 0);
}
}
break;
}
case BYTE: {
byte b = rs.getByte(i);
if (!rs.wasNull()) {
builder.set(field, b);
}
break;
}
case I16: {
short b = rs.getShort(i);
if (!rs.wasNull()) {
builder.set(field, b);
}
break;
}
case I32: {
if (columnType == Types.TIMESTAMP || columnType == Types.TIMESTAMP_WITH_TIMEZONE) {
Timestamp ts = rs.getTimestamp(i, UTC);
if (ts != null) {
builder.set(field, (int) (ts.getTime() / 1000L));
}
} else if (columnType == Types.DATE) {
Date date = rs.getDate(i, UTC);
if (date != null) {
builder.set(field, (int) (date.getTime() / 1000L));
}
} else {
int b = rs.getInt(i);
if (!rs.wasNull()) {
builder.set(field, b);
}
}
break;
}
case I64: {
if (columnType == Types.TIMESTAMP || columnType == Types.TIMESTAMP_WITH_TIMEZONE) {
Timestamp ts = rs.getTimestamp(i, UTC);
if (ts != null) {
builder.set(field, ts.getTime());
}
} else if (columnType == Types.DATE) {
Date date = rs.getDate(i, UTC);
if (date != null) {
builder.set(field, date.getTime());
}
} else {
long b = rs.getLong(i);
if (!rs.wasNull()) {
builder.set(field, b);
}
}
break;
}
case DOUBLE: {
double b = rs.getDouble(i);
if (!rs.wasNull()) {
builder.set(field, b);
}
break;
}
case STRING: {
switch (columnType) {
case Types.CLOB:
case Types.NCLOB: {
Reader reader = rs.getCharacterStream(i);
if (reader != null && !rs.wasNull()) {
try {
builder.set(field, IOUtils.readString(reader));
} catch (IOException e) {
throw new UncheckedIOException(e);
}
} else {
builder.clear(field);
}
break;
}
default: {
builder.set(field, rs.getString(i));
break;
}
}
break;
}
case BINARY: {
switch (columnType) {
case Types.BINARY:
case Types.VARBINARY:
byte[] ts = rs.getBytes(i);
if (ts != null) {
builder.set(field, Binary.copy(ts));
}
break;
case Types.LONGVARBINARY:
InputStream is = rs.getBinaryStream(i);
if (is != null) {
try {
builder.set(field, Binary.read(is));
} catch (IOException e) {
throw new UncheckedIOException(e.getMessage(), e);
}
}
break;
case Types.BLOB:
Blob blob = rs.getBlob(i);
if (blob != null) {
try {
builder.set(field, Binary.read(blob.getBinaryStream(), (int) blob.length()));
} catch (IOException e) {
throw new UncheckedIOException(e.getMessage(), e);
}
}
break;
case Types.CHAR:
case Types.VARCHAR:
case Types.LONGVARCHAR:
case Types.NCHAR:
case Types.NVARCHAR: {
String tmp = rs.getString(i);
if (tmp != null) {
builder.set(field, Binary.fromBase64(tmp));
}
break;
}
case Types.NULL:
break;
default:
throw new ResultSetException(
"Unknown column type " + rs.getMetaData().getColumnTypeName(i) +
"(" + columnType + ")" +
" for " + descriptor.getType().toString() +
" field " + field.getName() + " in " +
descriptor.getQualifiedName(),
null, ctx);
}
break;
}
case ENUM: {
int val = rs.getInt(i);
if (!rs.wasNull()) {
PEnumDescriptor ed = (PEnumDescriptor) field.getDescriptor();
builder.set(field, ed.findById(val));
}
break;
}
case MESSAGE: {
try {
PMessageDescriptor md = (PMessageDescriptor) field.getDescriptor();
switch (columnType) {
case Types.BINARY:
case Types.VARBINARY: {
byte[] data = rs.getBytes(i);
if (data != null) {
ByteArrayInputStream in = new ByteArrayInputStream(data);
builder.set(field, BINARY.deserialize(in, md));
}
break;
}
case Types.LONGVARBINARY: {
InputStream is = rs.getBinaryStream(i);
if (is != null) {
builder.set(field, BINARY.deserialize(is, md));
}
break;
}
case Types.BLOB: {
Blob blob = rs.getBlob(i);
if (blob != null) {
builder.set(field, BINARY.deserialize(blob.getBinaryStream(), md));
}
break;
}
case Types.CHAR:
case Types.VARCHAR:
case Types.NCHAR:
case Types.NVARCHAR: {
String tmp = rs.getString(i);
if (tmp != null) {
StringReader reader = new StringReader(tmp);
builder.set(field, JSON.deserialize(reader, md));
}
break;
}
case Types.LONGVARCHAR:
case Types.NCLOB:
case Types.CLOB: {
Clob clob = rs.getClob(i);
if (clob != null) {
builder.set(field, JSON.deserialize(clob.getCharacterStream(), md));
}
break;
}
case Types.NULL:
break;
default:
throw new ResultSetException(
"Unknown column type " + rs.getMetaData().getColumnTypeName(i) +
"(" + columnType + ")" +
" for " + descriptor.getType().toString() +
" field " + field.getName() + " in " +
descriptor.getQualifiedName(),
null, ctx);
}
} catch (IOException e) {
throw new UncheckedIOException(e.getMessage(), e);
}
break;
}
case LIST:
case SET:
case MAP: {
// ... woot?
}
case VOID:
default: {
throw new ResultSetException(
"Unhandled column of type " + rs.getMetaData().getColumnTypeName(i) +
"(" + columnType + ")" +
" for " + descriptor.getType().toString() +
" field " + field.getName() + " in " +
descriptor.getQualifiedName(),
null, ctx);
}
}
}
}
return builder.build();
}
private static final BinarySerializer BINARY = new BinarySerializer();
private static final JsonSerializer JSON = new JsonSerializer();
private final PMessageDescriptor descriptor;
private final Map> fieldNameMapping;
private final String tableName;
}