| /* |
| * Copyright 2017-present Open Networking Foundation |
| * |
| * 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.onosproject.restconf.utils; |
| |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.fasterxml.jackson.databind.node.ObjectNode; |
| import org.apache.commons.io.IOUtils; |
| import org.onlab.osgi.DefaultServiceDirectory; |
| import org.onosproject.restconf.api.RestconfException; |
| import org.onosproject.restconf.utils.exceptions.RestconfUtilsException; |
| import org.onosproject.yang.model.DataNode; |
| import org.onosproject.yang.model.ResourceData; |
| import org.onosproject.yang.model.ResourceId; |
| import org.onosproject.yang.runtime.CompositeData; |
| import org.onosproject.yang.runtime.CompositeStream; |
| import org.onosproject.yang.runtime.DefaultCompositeData; |
| import org.onosproject.yang.runtime.DefaultCompositeStream; |
| import org.onosproject.yang.model.DefaultResourceData; |
| import org.onosproject.yang.runtime.DefaultRuntimeContext; |
| import org.onosproject.yang.runtime.RuntimeContext; |
| import org.onosproject.yang.runtime.YangRuntimeService; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import static javax.ws.rs.core.Response.Status.INTERNAL_SERVER_ERROR; |
| |
| /** |
| * Utilities used by the RESTCONF app. |
| */ |
| public final class RestconfUtils { |
| /** |
| * No instantiation. |
| */ |
| private RestconfUtils() { |
| } |
| |
| /** |
| * Data format required by YangRuntime Service. |
| */ |
| private static final String JSON_FORMAT = "JSON"; |
| |
| private static final YangRuntimeService YANG_RUNTIME = |
| DefaultServiceDirectory.getService(YangRuntimeService.class); |
| |
| /** |
| * Converts an input stream to JSON objectNode. |
| * |
| * @param inputStream the InputStream from Resource Data |
| * @return JSON representation of the data resource |
| */ |
| public static ObjectNode convertInputStreamToObjectNode(InputStream inputStream) { |
| ObjectNode rootNode; |
| ObjectMapper mapper = new ObjectMapper(); |
| try { |
| rootNode = (ObjectNode) mapper.readTree(inputStream); |
| } catch (IOException e) { |
| throw new RestconfUtilsException("ERROR: InputStream failed to parse"); |
| } |
| return rootNode; |
| } |
| |
| /** |
| * Convert ObjectNode to InputStream. |
| * |
| * @param rootNode JSON representation of the data resource |
| * @return the InputStream from Resource Data |
| */ |
| public static InputStream convertObjectNodeToInputStream(ObjectNode rootNode) { |
| String json = rootNode.toString(); |
| InputStream inputStream; |
| try { |
| inputStream = IOUtils.toInputStream(json); |
| } catch (Exception e) { |
| throw new RestconfUtilsException("ERROR: Json Node failed to parse"); |
| } |
| return inputStream; |
| } |
| |
| /** |
| * Convert URI to ResourceId. |
| * |
| * @param uri URI of the data resource |
| * @return resource identifier |
| */ |
| public static ResourceId convertUriToRid(String uri) { |
| ResourceData resourceData = convertJsonToDataNode(uri, null); |
| return resourceData.resourceId(); |
| } |
| |
| /** |
| * Convert URI and ObjectNode to ResourceData. |
| * |
| * @param uri URI of the data resource |
| * @param rootNode JSON representation of the data resource |
| * @return represents type of node in data store |
| */ |
| public static ResourceData convertJsonToDataNode(String uri, |
| ObjectNode rootNode) { |
| RuntimeContext.Builder runtimeContextBuilder = new DefaultRuntimeContext.Builder(); |
| runtimeContextBuilder.setDataFormat(JSON_FORMAT); |
| RuntimeContext context = runtimeContextBuilder.build(); |
| InputStream jsonData = null; |
| if (rootNode != null) { |
| jsonData = convertObjectNodeToInputStream(rootNode); |
| } |
| CompositeStream compositeStream = new DefaultCompositeStream(uri, jsonData); |
| // CompositeStream --- YangRuntimeService ---> CompositeData. |
| CompositeData compositeData = YANG_RUNTIME.decode(compositeStream, context); |
| ResourceData resourceData = compositeData.resourceData(); |
| return resourceData; |
| } |
| |
| /** |
| * Convert Resource Id and Data Node to Json ObjectNode. |
| * |
| * @param rid resource identifier |
| * @param dataNode represents type of node in data store |
| * @return JSON representation of the data resource |
| */ |
| public static ObjectNode convertDataNodeToJson(ResourceId rid, DataNode dataNode) { |
| RuntimeContext.Builder runtimeContextBuilder = DefaultRuntimeContext.builder(); |
| runtimeContextBuilder.setDataFormat(JSON_FORMAT); |
| RuntimeContext context = runtimeContextBuilder.build(); |
| DefaultResourceData.Builder resourceDataBuilder = DefaultResourceData.builder(); |
| resourceDataBuilder.addDataNode(dataNode); |
| resourceDataBuilder.resourceId(rid); |
| ResourceData resourceData = resourceDataBuilder.build(); |
| DefaultCompositeData.Builder compositeDataBuilder = DefaultCompositeData.builder(); |
| compositeDataBuilder.resourceData(resourceData); |
| CompositeData compositeData = compositeDataBuilder.build(); |
| // CompositeData --- YangRuntimeService ---> CompositeStream. |
| CompositeStream compositeStream = YANG_RUNTIME.encode(compositeData, context); |
| InputStream inputStream = compositeStream.resourceData(); |
| ObjectNode rootNode = convertInputStreamToObjectNode(inputStream); |
| if (rootNode == null) { |
| throw new RestconfException("ERROR: InputStream can not be convert to ObjectNode", |
| INTERNAL_SERVER_ERROR); |
| } |
| return rootNode; |
| } |
| } |