2 * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.netconf.sal.connect.netconf.util;
10 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_CONFIG_NODEID;
11 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_CONFIG_QNAME;
12 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_DATA_NODEID;
13 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_FILTER_NODEID;
14 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_FILTER_QNAME;
15 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_OPERATION_QNAME;
16 import static org.opendaylight.netconf.util.NetconfUtil.NETCONF_DATA_QNAME;
18 import com.google.common.base.Preconditions;
19 import java.util.Collections;
20 import java.util.List;
21 import java.util.Locale;
22 import java.util.Map.Entry;
23 import java.util.Optional;
24 import javax.xml.transform.dom.DOMSource;
25 import org.opendaylight.netconf.api.DocumentedException;
26 import org.opendaylight.netconf.api.ModifyAction;
27 import org.opendaylight.netconf.api.xml.XmlElement;
28 import org.opendaylight.netconf.api.xml.XmlUtil;
29 import org.opendaylight.yangtools.yang.common.QName;
30 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
31 import org.opendaylight.yangtools.yang.data.api.schema.DOMSourceAnyxmlNode;
32 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
33 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
34 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
35 import org.w3c.dom.Attr;
36 import org.w3c.dom.Document;
37 import org.w3c.dom.Element;
38 import org.w3c.dom.Node;
41 * Transforms rpc structures to anyxml and vice versa. Provides support for devices, which don't expose their schema.
43 class SchemalessRpcStructureTransformer implements RpcStructureTransformer {
46 * Selects elements in anyxml data node, which matches path arguments QNames. Since class in not context aware,
47 * method searches for all elements as they are named in path.
48 * @param data data, must be of type {@link AnyXmlNode}
49 * @param path path to select
50 * @return selected data
53 public Optional<NormalizedNode<?, ?>> selectFromDataStructure(
54 final DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?> data,
55 final YangInstanceIdentifier path) {
56 Preconditions.checkArgument(data instanceof DOMSourceAnyxmlNode);
57 final List<XmlElement> xmlElements = selectMatchingNodes(
58 getSourceElement(((DOMSourceAnyxmlNode)data).getValue()), path);
59 final Document result = XmlUtil.newDocument();
60 final Element dataElement =
61 result.createElementNS(NETCONF_DATA_QNAME.getNamespace().toString(), NETCONF_DATA_QNAME.getLocalName());
62 result.appendChild(dataElement);
63 for (XmlElement xmlElement : xmlElements) {
64 dataElement.appendChild(result.importNode(xmlElement.getDomElement(), true));
66 final DOMSourceAnyxmlNode resultAnyxml = Builders.anyXmlBuilder()
67 .withNodeIdentifier(NETCONF_DATA_NODEID)
68 .withValue(new DOMSource(result))
70 return Optional.of(resultAnyxml);
74 * This class in not context aware. All elements are present in resulting structure, which are present in data path.
75 * @see RpcStructureTransformer#createEditConfigStructure(Optional, YangInstanceIdentifier, Optional)
77 * @param dataPath path, where data will be written
78 * @param operation operation
79 * @return config structure
82 public DOMSourceAnyxmlNode createEditConfigStructure(final Optional<NormalizedNode<?, ?>> data,
83 final YangInstanceIdentifier dataPath,
84 final Optional<ModifyAction> operation) {
85 Preconditions.checkArgument(data.isPresent());
86 Preconditions.checkArgument(data.get() instanceof DOMSourceAnyxmlNode);
88 final DOMSourceAnyxmlNode anxmlData = (DOMSourceAnyxmlNode) data.get();
89 final Document document = XmlUtil.newDocument();
90 final Element dataNode = (Element) document.importNode(getSourceElement(anxmlData.getValue()), true);
91 checkDataValidForPath(dataPath, dataNode);
93 final Element configElement = document.createElementNS(NETCONF_CONFIG_QNAME.getNamespace().toString(),
94 NETCONF_CONFIG_QNAME.getLocalName());
95 document.appendChild(configElement);
97 final Element parentXmlStructure;
98 if (dataPath.isEmpty()) {
99 parentXmlStructure = dataNode;
100 configElement.appendChild(parentXmlStructure);
102 final List<YangInstanceIdentifier.PathArgument> pathArguments = dataPath.getPathArguments();
103 //last will be appended later
104 final List<YangInstanceIdentifier.PathArgument> pathWithoutLast =
105 pathArguments.subList(0, pathArguments.size() - 1);
106 parentXmlStructure = instanceIdToXmlStructure(pathWithoutLast, configElement);
108 if (operation.isPresent()) {
109 setOperationAttribute(operation, document, dataNode);
112 parentXmlStructure.appendChild(document.importNode(dataNode, true));
113 return Builders.anyXmlBuilder().withNodeIdentifier(NETCONF_CONFIG_NODEID)
114 .withValue(new DOMSource(document.getDocumentElement()))
119 * This class in not context aware. All elements are present in resulting structure, which are present in data path.
120 * @see RpcStructureTransformer#toFilterStructure(YangInstanceIdentifier)
122 * @return filter structure
125 public DataContainerChild<?, ?> toFilterStructure(final YangInstanceIdentifier path) {
126 final Document document = XmlUtil.newDocument();
127 final String filterNs = NETCONF_FILTER_QNAME.getNamespace().toString();
128 final Element filter = document.createElementNS(filterNs, NETCONF_FILTER_QNAME.getLocalName());
129 final Attr a = document.createAttributeNS(filterNs, "type");
130 a.setTextContent("subtree");
131 filter.setAttributeNode(a);
132 document.appendChild(filter);
133 instanceIdToXmlStructure(path.getPathArguments(), filter);
134 return Builders.anyXmlBuilder()
135 .withNodeIdentifier(NETCONF_FILTER_NODEID)
136 .withValue(new DOMSource(document.getDocumentElement()))
141 public DataContainerChild<?, ?> toFilterStructure(final List<FieldsFilter> fieldsFilters) {
142 // todo: implementation of this feature
143 throw new UnsupportedOperationException(
144 "Creation of filter structure using fields for schemaless mountpoint is not supported");
147 private static void checkDataValidForPath(final YangInstanceIdentifier dataPath, final Element dataNode) {
148 //if datapath is empty, consider dataNode to be a root node
149 if (dataPath.isEmpty()) {
152 final XmlElement dataElement = XmlElement.fromDomElement(dataNode);
153 final YangInstanceIdentifier.PathArgument lastPathArgument = dataPath.getLastPathArgument();
154 final QName nodeType = lastPathArgument.getNodeType();
155 if (!nodeType.getNamespace().toString().equals(dataNode.getNamespaceURI())
156 || !nodeType.getLocalName().equals(dataElement.getName())) {
157 throw new IllegalStateException(
158 String.format("Can't write data '%s' to path %s", dataNode.getTagName(), dataPath));
160 if (lastPathArgument instanceof YangInstanceIdentifier.NodeIdentifierWithPredicates) {
161 checkKeyValuesValidForPath(dataElement, lastPathArgument);
166 private static void checkKeyValuesValidForPath(final XmlElement dataElement,
167 final YangInstanceIdentifier.PathArgument lastPathArgument) {
168 final YangInstanceIdentifier.NodeIdentifierWithPredicates keyedId =
169 (YangInstanceIdentifier.NodeIdentifierWithPredicates) lastPathArgument;
170 for (Entry<QName, Object> entry : keyedId.entrySet()) {
171 QName qualifiedName = entry.getKey();
172 final List<XmlElement> key =
173 dataElement.getChildElementsWithinNamespace(qualifiedName.getLocalName(),
174 qualifiedName.getNamespace().toString());
176 throw new IllegalStateException("No key present in xml");
178 if (key.size() > 1) {
179 throw new IllegalStateException("Multiple values for same key present");
181 final String textContent;
183 textContent = key.get(0).getTextContent();
184 } catch (DocumentedException e) {
185 throw new IllegalStateException("Key value not present in key element", e);
187 if (!entry.getValue().equals(textContent)) {
188 throw new IllegalStateException("Key value in path not equal to key value in xml");
193 private static void setOperationAttribute(final Optional<ModifyAction> operation, final Document document,
194 final Element dataNode) {
195 final Attr operationAttribute = document.createAttributeNS(NETCONF_OPERATION_QNAME.getNamespace().toString(),
196 NETCONF_OPERATION_QNAME.getLocalName());
197 operationAttribute.setTextContent(toOperationString(operation.get()));
198 dataNode.setAttributeNode(operationAttribute);
201 private static Element instanceIdToXmlStructure(final List<YangInstanceIdentifier.PathArgument> pathArguments,
202 final Element data) {
203 final Document doc = data.getOwnerDocument();
204 Element parent = data;
205 for (YangInstanceIdentifier.PathArgument pathArgument : pathArguments) {
206 final QName nodeType = pathArgument.getNodeType();
207 final Element element = doc.createElementNS(nodeType.getNamespace().toString(), nodeType.getLocalName());
208 parent.appendChild(element);
209 //if path argument is list id, add also keys to resulting xml
210 if (pathArgument instanceof YangInstanceIdentifier.NodeIdentifierWithPredicates) {
211 YangInstanceIdentifier.NodeIdentifierWithPredicates listNode =
212 (YangInstanceIdentifier.NodeIdentifierWithPredicates) pathArgument;
213 for (Entry<QName, Object> key : listNode.entrySet()) {
214 final Element keyElement =
215 doc.createElementNS(key.getKey().getNamespace().toString(), key.getKey().getLocalName());
216 keyElement.setTextContent(key.getValue().toString());
217 element.appendChild(keyElement);
225 private static List<XmlElement> selectMatchingNodes(final Element domElement, final YangInstanceIdentifier path) {
226 XmlElement element = XmlElement.fromDomElement(domElement);
227 for (YangInstanceIdentifier.PathArgument pathArgument : path.getPathArguments()) {
228 List<XmlElement> childElements = element.getChildElements(pathArgument.getNodeType().getLocalName());
229 if (childElements.size() == 1) {
230 element = childElements.get(0);
232 return childElements;
235 return Collections.singletonList(element);
238 private static String toOperationString(final ModifyAction operation) {
239 return operation.name().toLowerCase(Locale.ROOT);
242 private static Element getSourceElement(final DOMSource source) {
243 final Node node = source.getNode();
244 switch (node.getNodeType()) {
245 case Node.DOCUMENT_NODE:
246 return ((Document)node).getDocumentElement();
247 case Node.ELEMENT_NODE:
248 return (Element) node;
250 throw new IllegalStateException("DOMSource node must be document or element.");