LwM2mObjectModelUtils.java
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/**
* Copyright © 2016-2024 The Thingsboard Authors
*
* 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.thingsboard.server.utils;
import lombok.extern.slf4j.Slf4j;
import org.eclipse.leshan.core.model.InvalidDDFFileException;
import org.eclipse.leshan.core.model.ObjectModel;
import org.thingsboard.server.common.data.ResourceType;
import org.thingsboard.server.common.data.TbResource;
import org.thingsboard.server.common.data.exception.ThingsboardErrorCode;
import org.thingsboard.server.common.data.exception.ThingsboardException;
import org.thingsboard.server.common.data.lwm2m.LwM2mInstance;
import org.thingsboard.server.common.data.lwm2m.LwM2mObject;
import org.thingsboard.server.common.data.lwm2m.LwM2mResourceObserve;
import org.thingsboard.server.common.data.util.TbDDFFileParser;
import org.thingsboard.server.dao.exception.DataValidationException;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Base64;
import java.util.List;
import static org.thingsboard.server.common.data.lwm2m.LwM2mConstants.LWM2M_SEPARATOR_KEY;
import static org.thingsboard.server.common.data.lwm2m.LwM2mConstants.LWM2M_SEPARATOR_SEARCH_TEXT;
@Slf4j
public class LwM2mObjectModelUtils {
private static final TbDDFFileParser ddfFileParser = new TbDDFFileParser();
public static void toLwm2mResource(TbResource resource) throws ThingsboardException {
try {
List<ObjectModel> objectModels =
ddfFileParser.parse(new ByteArrayInputStream(resource.getData()), resource.getSearchText());
if (!objectModels.isEmpty()) {
ObjectModel objectModel = objectModels.get(0);
String resourceKey = objectModel.id + LWM2M_SEPARATOR_KEY + objectModel.version;
String name = objectModel.name;
resource.setResourceKey(resourceKey);
if (resource.getId() == null) {
resource.setTitle(name + " id=" + objectModel.id + " v" + objectModel.version);
}
resource.setSearchText(resourceKey + LWM2M_SEPARATOR_SEARCH_TEXT + name);
} else {
throw new DataValidationException(String.format("Could not parse the XML of objectModel with name %s", resource.getSearchText()));
}
} catch (InvalidDDFFileException e) {
log.error("Failed to parse file {}", resource.getFileName(), e);
throw new DataValidationException("Failed to parse file " + resource.getFileName());
} catch (IOException e) {
throw new ThingsboardException(e, ThingsboardErrorCode.GENERAL);
}
if (resource.getResourceType().equals(ResourceType.LWM2M_MODEL) && toLwM2mObject(resource, true) == null) {
throw new DataValidationException(String.format("Could not parse the XML of objectModel with name %s", resource.getSearchText()));
}
}
public static LwM2mObject toLwM2mObject(TbResource resource, boolean isSave) {
try {
List<ObjectModel> objectModels =
ddfFileParser.parse(new ByteArrayInputStream(resource.getData()), resource.getSearchText());
if (objectModels.size() == 0) {
return null;
} else {
ObjectModel obj = objectModels.get(0);
LwM2mObject lwM2mObject = new LwM2mObject();
lwM2mObject.setId(obj.id);
lwM2mObject.setKeyId(resource.getResourceKey());
lwM2mObject.setName(obj.name);
lwM2mObject.setMultiple(obj.multiple);
lwM2mObject.setMandatory(obj.mandatory);
LwM2mInstance instance = new LwM2mInstance();
instance.setId(0);
List<LwM2mResourceObserve> resources = new ArrayList<>();
obj.resources.forEach((k, v) -> {
if (isSave) {
LwM2mResourceObserve lwM2MResourceObserve = new LwM2mResourceObserve(k, v.name, false, false, false);
resources.add(lwM2MResourceObserve);
} else if (v.operations.isReadable()) {
LwM2mResourceObserve lwM2MResourceObserve = new LwM2mResourceObserve(k, v.name, false, false, false);
resources.add(lwM2MResourceObserve);
}
});
if (isSave || resources.size() > 0) {
instance.setResources(resources.toArray(LwM2mResourceObserve[]::new));
lwM2mObject.setInstances(new LwM2mInstance[]{instance});
return lwM2mObject;
} else {
return null;
}
}
} catch (IOException | InvalidDDFFileException e) {
log.error("Could not parse the XML of objectModel with name [{}]", resource.getSearchText(), e);
return null;
}
}
}