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/*
* Copyright 2022 Anton Tananaev (anton@traccar.org)
*
* Licensed 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 org.traccar.storage;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.traccar.config.Config;
import org.traccar.model.BaseModel;
import org.traccar.model.Device;
import org.traccar.model.Group;
import org.traccar.model.GroupedModel;
import org.traccar.model.Permission;
import org.traccar.storage.query.Columns;
import org.traccar.storage.query.Condition;
import org.traccar.storage.query.Order;
import org.traccar.storage.query.Request;
import jakarta.inject.Inject;
import javax.sql.DataSource;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.function.Function;
import java.util.stream.Collectors;
public class DatabaseStorage extends Storage {
private final Config config;
private final DataSource dataSource;
private final ObjectMapper objectMapper;
private final String databaseType;
@Inject
public DatabaseStorage(Config config, DataSource dataSource, ObjectMapper objectMapper) {
this.config = config;
this.dataSource = dataSource;
this.objectMapper = objectMapper;
try {
databaseType = dataSource.getConnection().getMetaData().getDatabaseProductName();
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
@Override
public <T> List<T> getObjects(Class<T> clazz, Request request) throws StorageException {
StringBuilder query = new StringBuilder("SELECT ");
if (request.getColumns() instanceof Columns.All) {
query.append('*');
} else {
query.append(formatColumns(request.getColumns().getColumns(clazz, "set"), c -> c));
}
query.append(" FROM ").append(getStorageName(clazz));
query.append(formatCondition(request.getCondition()));
query.append(formatOrder(request.getOrder()));
try {
QueryBuilder builder = QueryBuilder.create(config, dataSource, objectMapper, query.toString());
for (Map.Entry<String, Object> variable : getConditionVariables(request.getCondition()).entrySet()) {
builder.setValue(variable.getKey(), variable.getValue());
}
return builder.executeQuery(clazz);
} catch (SQLException e) {
throw new StorageException(e);
}
}
@Override
public <T> long addObject(T entity, Request request) throws StorageException {
List<String> columns = request.getColumns().getColumns(entity.getClass(), "get");
StringBuilder query = new StringBuilder("INSERT INTO ");
query.append(getStorageName(entity.getClass()));
query.append("(");
query.append(formatColumns(columns, c -> c));
query.append(") VALUES (");
query.append(formatColumns(columns, c -> ':' + c));
query.append(")");
try {
QueryBuilder builder = QueryBuilder.create(config, dataSource, objectMapper, query.toString(), true);
builder.setObject(entity, columns);
return builder.executeUpdate();
} catch (SQLException e) {
throw new StorageException(e);
}
}
@Override
public <T> void updateObject(T entity, Request request) throws StorageException {
List<String> columns = request.getColumns().getColumns(entity.getClass(), "get");
StringBuilder query = new StringBuilder("UPDATE ");
query.append(getStorageName(entity.getClass()));
query.append(" SET ");
query.append(formatColumns(columns, c -> c + " = :" + c));
query.append(formatCondition(request.getCondition()));
try {
QueryBuilder builder = QueryBuilder.create(config, dataSource, objectMapper, query.toString());
builder.setObject(entity, columns);
for (Map.Entry<String, Object> variable : getConditionVariables(request.getCondition()).entrySet()) {
builder.setValue(variable.getKey(), variable.getValue());
}
builder.executeUpdate();
} catch (SQLException e) {
throw new StorageException(e);
}
}
@Override
public void removeObject(Class<?> clazz, Request request) throws StorageException {
StringBuilder query = new StringBuilder("DELETE FROM ");
query.append(getStorageName(clazz));
query.append(formatCondition(request.getCondition()));
try {
QueryBuilder builder = QueryBuilder.create(config, dataSource, objectMapper, query.toString());
for (Map.Entry<String, Object> variable : getConditionVariables(request.getCondition()).entrySet()) {
builder.setValue(variable.getKey(), variable.getValue());
}
builder.executeUpdate();
} catch (SQLException e) {
throw new StorageException(e);
}
}
@Override
public List<Permission> getPermissions(
Class<? extends BaseModel> ownerClass, long ownerId,
Class<? extends BaseModel> propertyClass, long propertyId) throws StorageException {
StringBuilder query = new StringBuilder("SELECT * FROM ");
query.append(Permission.getStorageName(ownerClass, propertyClass));
var conditions = new LinkedList<Condition>();
if (ownerId > 0) {
conditions.add(new Condition.Equals(Permission.getKey(ownerClass), ownerId));
}
if (propertyId > 0) {
conditions.add(new Condition.Equals(Permission.getKey(propertyClass), propertyId));
}
Condition combinedCondition = Condition.merge(conditions);
query.append(formatCondition(combinedCondition));
try {
QueryBuilder builder = QueryBuilder.create(config, dataSource, objectMapper, query.toString());
for (Map.Entry<String, Object> variable : getConditionVariables(combinedCondition).entrySet()) {
builder.setValue(variable.getKey(), variable.getValue());
}
return builder.executePermissionsQuery();
} catch (SQLException e) {
throw new StorageException(e);
}
}
@Override
public void addPermission(Permission permission) throws StorageException {
StringBuilder query = new StringBuilder("INSERT INTO ");
query.append(permission.getStorageName());
query.append(" VALUES (");
query.append(permission.get().keySet().stream().map(key -> ':' + key).collect(Collectors.joining(", ")));
query.append(")");
try {
QueryBuilder builder = QueryBuilder.create(config, dataSource, objectMapper, query.toString(), true);
for (var entry : permission.get().entrySet()) {
builder.setLong(entry.getKey(), entry.getValue());
}
builder.executeUpdate();
} catch (SQLException e) {
throw new StorageException(e);
}
}
@Override
public void removePermission(Permission permission) throws StorageException {
StringBuilder query = new StringBuilder("DELETE FROM ");
query.append(permission.getStorageName());
query.append(" WHERE ");
query.append(permission
.get().keySet().stream().map(key -> key + " = :" + key).collect(Collectors.joining(" AND ")));
try {
QueryBuilder builder = QueryBuilder.create(config, dataSource, objectMapper, query.toString(), true);
for (var entry : permission.get().entrySet()) {
builder.setLong(entry.getKey(), entry.getValue());
}
builder.executeUpdate();
} catch (SQLException e) {
throw new StorageException(e);
}
}
private String getStorageName(Class<?> clazz) throws StorageException {
StorageName storageName = clazz.getAnnotation(StorageName.class);
if (storageName == null) {
throw new StorageException("StorageName annotation is missing");
}
return storageName.value();
}
private Map<String, Object> getConditionVariables(Condition genericCondition) {
Map<String, Object> results = new HashMap<>();
if (genericCondition instanceof Condition.Compare condition) {
if (condition.getValue() != null) {
results.put(condition.getVariable(), condition.getValue());
}
} else if (genericCondition instanceof Condition.Between condition) {
results.put(condition.getFromVariable(), condition.getFromValue());
results.put(condition.getToVariable(), condition.getToValue());
} else if (genericCondition instanceof Condition.Binary condition) {
results.putAll(getConditionVariables(condition.getFirst()));
results.putAll(getConditionVariables(condition.getSecond()));
} else if (genericCondition instanceof Condition.Permission condition) {
if (condition.getOwnerId() > 0) {
results.put(Permission.getKey(condition.getOwnerClass()), condition.getOwnerId());
} else {
results.put(Permission.getKey(condition.getPropertyClass()), condition.getPropertyId());
}
} else if (genericCondition instanceof Condition.LatestPositions condition) {
if (condition.getDeviceId() > 0) {
results.put("deviceId", condition.getDeviceId());
}
}
return results;
}
private String formatColumns(List<String> columns, Function<String, String> mapper) {
return columns.stream().map(mapper).collect(Collectors.joining(", "));
}
private String formatCondition(Condition genericCondition) throws StorageException {
return formatCondition(genericCondition, true);
}
private String formatCondition(Condition genericCondition, boolean appendWhere) throws StorageException {
StringBuilder result = new StringBuilder();
if (genericCondition != null) {
if (appendWhere) {
result.append(" WHERE ");
}
if (genericCondition instanceof Condition.Compare condition) {
result.append(condition.getColumn());
result.append(" ");
result.append(condition.getOperator());
result.append(" :");
result.append(condition.getVariable());
} else if (genericCondition instanceof Condition.Between condition) {
result.append(condition.getColumn());
result.append(" BETWEEN :");
result.append(condition.getFromVariable());
result.append(" AND :");
result.append(condition.getToVariable());
} else if (genericCondition instanceof Condition.Binary condition) {
result.append(formatCondition(condition.getFirst(), false));
result.append(" ");
result.append(condition.getOperator());
result.append(" ");
result.append(formatCondition(condition.getSecond(), false));
} else if (genericCondition instanceof Condition.Permission condition) {
result.append("id IN (");
result.append(formatPermissionQuery(condition));
result.append(")");
} else if (genericCondition instanceof Condition.LatestPositions condition) {
result.append("id IN (");
result.append("SELECT positionId FROM ");
result.append(getStorageName(Device.class));
if (condition.getDeviceId() > 0) {
result.append(" WHERE id = :deviceId");
}
result.append(")");
}
}
return result.toString();
}
private String formatOrder(Order order) {
StringBuilder result = new StringBuilder();
if (order != null) {
result.append(" ORDER BY ");
result.append(order.getColumn());
if (order.getDescending()) {
result.append(" DESC");
}
if (order.getLimit() > 0) {
if (databaseType.equals("Microsoft SQL Server")) {
result.append(" OFFSET 0 ROWS FETCH FIRST ");
result.append(order.getLimit());
result.append(" ROWS ONLY");
} else {
result.append(" LIMIT ");
result.append(order.getLimit());
}
}
}
return result.toString();
}
private String formatPermissionQuery(Condition.Permission condition) throws StorageException {
StringBuilder result = new StringBuilder();
String outputKey;
String conditionKey;
if (condition.getOwnerId() > 0) {
outputKey = Permission.getKey(condition.getPropertyClass());
conditionKey = Permission.getKey(condition.getOwnerClass());
} else {
outputKey = Permission.getKey(condition.getOwnerClass());
conditionKey = Permission.getKey(condition.getPropertyClass());
}
String storageName = Permission.getStorageName(condition.getOwnerClass(), condition.getPropertyClass());
result.append("SELECT ");
result.append(storageName).append('.').append(outputKey);
result.append(" FROM ");
result.append(storageName);
result.append(" WHERE ");
result.append(conditionKey);
result.append(" = :");
result.append(conditionKey);
if (condition.getIncludeGroups()) {
boolean expandDevices;
String groupStorageName;
if (GroupedModel.class.isAssignableFrom(condition.getOwnerClass())) {
expandDevices = Device.class.isAssignableFrom(condition.getOwnerClass());
groupStorageName = Permission.getStorageName(Group.class, condition.getPropertyClass());
} else {
expandDevices = Device.class.isAssignableFrom(condition.getPropertyClass());
groupStorageName = Permission.getStorageName(condition.getOwnerClass(), Group.class);
}
result.append(" UNION ");
result.append("SELECT DISTINCT ");
if (!expandDevices) {
if (outputKey.equals("groupId")) {
result.append("all_groups.");
} else {
result.append(groupStorageName).append('.');
}
}
result.append(outputKey);
result.append(" FROM ");
result.append(groupStorageName);
result.append(" INNER JOIN (");
result.append("SELECT id as parentId, id as groupId FROM ");
result.append(getStorageName(Group.class));
result.append(" UNION ");
result.append("SELECT groupId as parentId, id as groupId FROM ");
result.append(getStorageName(Group.class));
result.append(" WHERE groupId IS NOT NULL");
result.append(" UNION ");
result.append("SELECT g2.groupId as parentId, g1.id as groupId FROM ");
result.append(getStorageName(Group.class));
result.append(" AS g2");
result.append(" INNER JOIN ");
result.append(getStorageName(Group.class));
result.append(" AS g1 ON g2.id = g1.groupId");
result.append(" WHERE g2.groupId IS NOT NULL");
result.append(") AS all_groups ON ");
result.append(groupStorageName);
result.append(".groupId = all_groups.parentId");
if (expandDevices) {
result.append(" INNER JOIN (");
result.append("SELECT groupId as parentId, id as deviceId FROM ");
result.append(getStorageName(Device.class));
result.append(" WHERE groupId IS NOT NULL");
result.append(") AS devices ON all_groups.groupId = devices.parentId");
}
result.append(" WHERE ");
result.append(conditionKey);
result.append(" = :");
result.append(conditionKey);
}
return result.toString();
}
}
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