ODTN manual testing tool for OpenConfig configuration

- ONOS-7567

Example:
onos> odtn-manual-test ENABLE_TRANSCEIVER
JSON:
{
  "openconfig-platform:component" : [ {
    "name" : "TRANSCEIVER_1_1_4_1",
    "openconfig-platform-transceiver:transceiver" : {
      "config" : {
        "enabled" : "true"
      }
    },
    "config" : {
      "name" : "TRANSCEIVER_1_1_4_1"
    }
  } ]
}
XML:
<rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
  <edit-config>
    <target>
      <running/>
    </target>
    <config xmlns:xc="urn:ietf:params:xml:ns:netconf:base:1.0">
      <component xmlns="http://openconfig.net/yang/platform" xc:operation="merge">
        <name>TRANSCEIVER_1_1_4_1</name>
        <transceiver xmlns="http://openconfig.net/yang/platform/transceiver">
          <config>
            <enabled>true</enabled>
          </config>
        </transceiver>
        <config>
          <name>TRANSCEIVER_1_1_4_1</name>
        </config>
      </component>
    </config>
  </edit-config>
</rpc>

Change-Id: Ief5f1a1933fb00a2118bd941d8c5f0310ed9c815
diff --git a/apps/odtn/src/main/java/org/onosproject/odtn/utils/YangToolUtil.java b/apps/odtn/src/main/java/org/onosproject/odtn/utils/YangToolUtil.java
new file mode 100644
index 0000000..4df3943
--- /dev/null
+++ b/apps/odtn/src/main/java/org/onosproject/odtn/utils/YangToolUtil.java
@@ -0,0 +1,293 @@
+/*
+ * Copyright 2018-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.odtn.utils;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.slf4j.LoggerFactory.getLogger;
+
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.StringWriter;
+
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.transform.OutputKeys;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerException;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamResult;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onlab.osgi.DefaultServiceDirectory;
+import org.onosproject.yang.model.DataNode;
+import org.onosproject.yang.model.DefaultModelObjectData;
+import org.onosproject.yang.model.DefaultResourceData;
+import org.onosproject.yang.model.InnerNode;
+import org.onosproject.yang.model.ModelConverter;
+import org.onosproject.yang.model.ModelObject;
+import org.onosproject.yang.model.ModelObjectData;
+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.DefaultRuntimeContext;
+import org.onosproject.yang.runtime.RuntimeContext;
+import org.onosproject.yang.runtime.YangRuntimeService;
+import org.slf4j.Logger;
+import org.w3c.dom.Document;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import com.google.common.annotations.Beta;
+import com.google.common.io.CharStreams;
+
+@Beta
+@Component(immediate = true)
+public class YangToolUtil {
+    private static final Logger log = getLogger(YangToolUtil.class);
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected YangRuntimeService yangRuntimeService;
+    protected static YangRuntimeService yrs;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected ModelConverter modelConverter;
+    protected static ModelConverter converter;
+
+    @Activate
+    protected void activate() {
+        yrs = yangRuntimeService;
+        converter = modelConverter;
+        log.info("Started");
+    }
+
+    @Deactivate
+    protected void deactivate() {
+        log.info("Stopped");
+    }
+
+    protected static void initStaticContext() {
+        if (yrs == null) {
+            yrs = DefaultServiceDirectory.getService(YangRuntimeService.class);
+        }
+        if (converter == null) {
+            converter = DefaultServiceDirectory.getService(ModelConverter.class);
+        }
+    }
+
+    /**
+     * Converts XML Document into CharSequence.
+     *
+     * @param xmlInput to convert
+     * @return CharSequence
+     */
+    public static CharSequence toCharSequence(Document xmlInput) {
+        return toCharSequence(xmlInput, true);
+    }
+
+    /**
+     * Converts XML Document into CharSequence.
+     *
+     * @param xmlInput to convert
+     * @param omitXmlDecl or not
+     * @return CharSequence
+     */
+    public static CharSequence toCharSequence(Document xmlInput, boolean omitXmlDecl) {
+        try {
+            TransformerFactory tf = TransformerFactory.newInstance();
+            Transformer transformer = tf.newTransformer();
+            if (omitXmlDecl) {
+                transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
+            }
+            StringWriter writer = new StringWriter();
+            transformer.transform(new DOMSource(xmlInput), new StreamResult(writer));
+            return writer.getBuffer();
+        } catch (TransformerException e) {
+            log.error("Exception thrown", e);
+            return null;
+        }
+    }
+
+    /**
+     * Converts JsonNode into CharSequence.
+     *
+     * @param jsonInput to convert
+     * @return CharSequence
+     */
+    public static CharSequence toCharSequence(JsonNode jsonInput) {
+        checkNotNull(jsonInput);
+        ObjectMapper mapper = new ObjectMapper();
+        // TODO following pretty printing option should be removed
+        mapper.enable(SerializationFeature.INDENT_OUTPUT);
+
+        try {
+            return mapper.writerWithDefaultPrettyPrinter()
+                        .writeValueAsString(jsonInput);
+        } catch (JsonProcessingException e) {
+            log.error("Exception thrown", e);
+            return null;
+        }
+    }
+
+    /**
+     * Converts UTF-8 CompositeStream into CharSequence.
+     *
+     * @param utf8Input to convert
+     * @return CharSequence
+     */
+    public static CharSequence toCharSequence(CompositeStream utf8Input) {
+        StringBuilder s = new StringBuilder();
+        try {
+            CharStreams.copy(new InputStreamReader(utf8Input.resourceData(), UTF_8), s);
+            return s;
+        } catch (IOException e) {
+            log.error("Exception thrown", e);
+            return null;
+        }
+    }
+
+    /**
+     * Converts JSON CompositeStream into JsonNode.
+     *
+     * @param jsonInput to convert
+     * @return JsonNode
+     */
+    public static JsonNode toJsonNode(CompositeStream jsonInput) {
+        ObjectMapper mapper = new ObjectMapper();
+        try {
+            return mapper.readTree(jsonInput.resourceData());
+        } catch (IOException e) {
+            log.error("Exception thrown", e);
+            return null;
+        }
+    }
+
+    /**
+     * Converts XML CompositeStream into XML Document.
+     *
+     * @param xmlInput to convert
+     * @return Document
+     */
+    public static Document toDocument(CompositeStream xmlInput) {
+        try {
+            return DocumentBuilderFactory.newInstance()
+                    .newDocumentBuilder()
+                .parse(new InputSource(new InputStreamReader(xmlInput.resourceData(), UTF_8)));
+        } catch (ParserConfigurationException | SAXException | IOException e) {
+            log.error("Exception thrown", e);
+            return null;
+        }
+    }
+
+    /**
+     * Converts CompositeData into XML CompositeStream.
+     *
+     * @param input CompositeData to convert
+     * @return XML CompositeStream
+     */
+    public static CompositeStream toXmlCompositeStream(CompositeData input) {
+        initStaticContext();
+        RuntimeContext yrtContext = new DefaultRuntimeContext.Builder()
+                .setDataFormat("xml")
+                // Following does not have any effect?
+                //.addAnnotation(XMLNS_XC_ANNOTATION)
+                .build();
+        CompositeStream xml = yrs.encode(input, yrtContext);
+        return xml;
+    }
+
+    /**
+     * Converts CompositeData into JSON CompositeStream.
+     *
+     * @param input CompositeData to convert
+     * @return JSON CompositeStream
+     */
+    public static CompositeStream toJsonCompositeStream(CompositeData input) {
+        initStaticContext();
+        RuntimeContext yrtContext = new DefaultRuntimeContext.Builder()
+                .setDataFormat("JSON")
+                .build();
+        CompositeStream xml = yrs.encode(input, yrtContext);
+        return xml;
+    }
+
+    /**
+     * Converts ResourceData into CompositeData.
+     *
+     * @param input ResourceData to convert
+     * @return CompositeData
+     */
+    public static CompositeData toCompositeData(ResourceData input) {
+        CompositeData.Builder builder =
+                DefaultCompositeData.builder();
+        builder.resourceData(input);
+        // remove, merge, replace, ...
+        //builder.addAnnotatedNodeInfo(info)
+
+        return builder.build();
+    }
+
+    /**
+     * Converts DataNode into ResourceData.
+     *
+     * @param resourceId pointing to parent of {@code dataNode}, YANG-wise.
+     * @param dataNode to convert, must be InnerNode
+     * @return ResourceData
+     */
+    public static ResourceData toResourceData(ResourceId resourceId, DataNode dataNode) {
+        DefaultResourceData.Builder builder = DefaultResourceData.builder();
+        builder.resourceId(checkNotNull(resourceId));
+        if (dataNode instanceof InnerNode) {
+            ((InnerNode) dataNode).childNodes().values().forEach(builder::addDataNode);
+        } else {
+            log.error("Unexpected DataNode encountered {}", dataNode);
+        }
+        return builder.build();
+    }
+
+
+    /**
+     * Converts ModelObject into a DataNode.
+     *
+     * @param input ModelOject
+     * @return DataNode
+     */
+    public static DataNode toDataNode(ModelObject input) {
+        initStaticContext();
+        ModelObjectData modelData = DefaultModelObjectData.builder()
+                .addModelObject(input)
+                .identifier(null)
+                .build();
+
+        ResourceData rnode = converter.createDataNode(modelData);
+        if (rnode.dataNodes().isEmpty()) {
+            log.error("input did not result in any datanode. {}", input);
+            return null;
+        }
+        return rnode.dataNodes().get(0);
+    }
+}
diff --git a/apps/odtn/src/main/java/org/onosproject/odtn/utils/package-info.java b/apps/odtn/src/main/java/org/onosproject/odtn/utils/package-info.java
new file mode 100644
index 0000000..4f15f89
--- /dev/null
+++ b/apps/odtn/src/main/java/org/onosproject/odtn/utils/package-info.java
@@ -0,0 +1,19 @@
+/*
+ * Copyright 2018-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.
+ */
+/**
+ * Utilities developed for ODTN.
+ */
+package org.onosproject.odtn.utils;