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
9 package org.opendaylight.restconf.jersey.providers;
11 import com.google.common.base.Splitter;
12 import com.google.common.collect.ImmutableList;
13 import java.io.IOException;
14 import java.io.InputStream;
15 import java.lang.annotation.Annotation;
16 import java.lang.reflect.Type;
18 import java.util.ArrayList;
19 import java.util.Iterator;
20 import java.util.List;
21 import javax.annotation.Nonnull;
22 import javax.ws.rs.Consumes;
23 import javax.ws.rs.WebApplicationException;
24 import javax.ws.rs.core.MediaType;
25 import javax.ws.rs.core.MultivaluedMap;
26 import javax.ws.rs.ext.MessageBodyReader;
27 import javax.ws.rs.ext.Provider;
28 import org.opendaylight.netconf.sal.restconf.impl.InstanceIdentifierContext;
29 import org.opendaylight.netconf.sal.restconf.impl.PatchContext;
30 import org.opendaylight.netconf.sal.restconf.impl.PatchEditOperation;
31 import org.opendaylight.netconf.sal.restconf.impl.PatchEntity;
32 import org.opendaylight.netconf.sal.restconf.impl.RestconfDocumentedException;
33 import org.opendaylight.netconf.sal.restconf.impl.RestconfError.ErrorTag;
34 import org.opendaylight.netconf.sal.restconf.impl.RestconfError.ErrorType;
35 import org.opendaylight.restconf.Rfc8040;
36 import org.opendaylight.restconf.utils.RestconfConstants;
37 import org.opendaylight.yangtools.util.xml.UntrustedXML;
38 import org.opendaylight.yangtools.yang.common.QName;
39 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
40 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
41 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
42 import org.opendaylight.yangtools.yang.data.impl.codec.xml.XmlUtils;
43 import org.opendaylight.yangtools.yang.data.impl.schema.transform.dom.parser.DomToNormalizedNodeParserFactory;
44 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
45 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
46 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
47 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
48 import org.opendaylight.yangtools.yang.model.api.Module;
49 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
50 import org.opendaylight.yangtools.yang.model.util.SchemaContextUtil;
51 import org.slf4j.Logger;
52 import org.slf4j.LoggerFactory;
53 import org.w3c.dom.Document;
54 import org.w3c.dom.Element;
55 import org.w3c.dom.Node;
56 import org.w3c.dom.NodeList;
59 @Consumes({Rfc8040.MediaTypes.PATCH + RestconfConstants.XML})
60 public class XmlToPatchBodyReader extends AbstractIdentifierAwareJaxRsProvider implements
61 MessageBodyReader<PatchContext> {
63 private static final Logger LOG = LoggerFactory.getLogger(XmlToPatchBodyReader.class);
64 private static final Splitter SLASH_SPLITTER = Splitter.on('/');
67 public boolean isReadable(final Class<?> type, final Type genericType,
68 final Annotation[] annotations, final MediaType mediaType) {
72 @SuppressWarnings("checkstyle:IllegalCatch")
74 public PatchContext readFrom(final Class<PatchContext> type, final Type genericType,
75 final Annotation[] annotations, final MediaType mediaType,
76 final MultivaluedMap<String, String> httpHeaders, final InputStream entityStream)
77 throws IOException, WebApplicationException {
80 final InstanceIdentifierContext<?> path = getInstanceIdentifierContext();
82 if (entityStream.available() < 1) {
83 // represent empty nopayload input
84 return new PatchContext(path, null, null);
87 final Document doc = UntrustedXML.newDocumentBuilder().parse(entityStream);
88 return parse(path, doc);
89 } catch (final RestconfDocumentedException e) {
91 } catch (final Exception e) {
92 LOG.debug("Error parsing xml input", e);
94 throw new RestconfDocumentedException("Error parsing input: " + e.getMessage(), ErrorType.PROTOCOL,
95 ErrorTag.MALFORMED_MESSAGE);
99 private static PatchContext parse(final InstanceIdentifierContext<?> pathContext, final Document doc) {
100 final List<PatchEntity> resultCollection = new ArrayList<>();
101 final String patchId = doc.getElementsByTagName("patch-id").item(0).getFirstChild().getNodeValue();
102 final NodeList editNodes = doc.getElementsByTagName("edit");
103 final DomToNormalizedNodeParserFactory parserFactory =
104 DomToNormalizedNodeParserFactory.getInstance(XmlUtils.DEFAULT_XML_CODEC_PROVIDER,
105 pathContext.getSchemaContext());
107 for (int i = 0; i < editNodes.getLength(); i++) {
108 DataSchemaNode schemaNode = (DataSchemaNode) pathContext.getSchemaNode();
109 final Element element = (Element) editNodes.item(i);
110 final String operation = element.getElementsByTagName("operation").item(0).getFirstChild().getNodeValue();
111 final String editId = element.getElementsByTagName("edit-id").item(0).getFirstChild().getNodeValue();
112 final String target = element.getElementsByTagName("target").item(0).getFirstChild().getNodeValue();
113 final List<Element> values = readValueNodes(element, operation);
114 final Element firstValueElement = values != null ? values.get(0) : null;
116 // get namespace according to schema node from path context or value
117 final String namespace = firstValueElement == null
118 ? schemaNode.getQName().getNamespace().toString() : firstValueElement.getNamespaceURI();
120 // find module according to namespace
121 final Module module = pathContext.getSchemaContext().findModuleByNamespace(
122 URI.create(namespace)).iterator().next();
124 // initialize codec + set default prefix derived from module name
125 final StringModuleInstanceIdentifierCodec codec = new StringModuleInstanceIdentifierCodec(
126 pathContext.getSchemaContext(), module.getName());
128 // find complete path to target and target schema node
129 // target can be also empty (only slash)
130 YangInstanceIdentifier targetII;
131 final SchemaNode targetNode;
132 if (target.equals("/")) {
133 targetII = pathContext.getInstanceIdentifier();
134 targetNode = pathContext.getSchemaContext();
136 targetII = codec.deserialize(codec.serialize(pathContext.getInstanceIdentifier())
137 .concat(prepareNonCondXpath(schemaNode, target.replaceFirst("/", ""), firstValueElement,
138 namespace, module.getQNameModule().getFormattedRevision())));
140 targetNode = SchemaContextUtil.findDataSchemaNode(pathContext.getSchemaContext(),
141 codec.getDataContextTree().getChild(targetII).getDataSchemaNode().getPath().getParent());
144 schemaNode = (DataSchemaNode) SchemaContextUtil.findDataSchemaNode(pathContext.getSchemaContext(),
145 codec.getDataContextTree().getChild(targetII).getDataSchemaNode().getPath());
148 if (targetNode == null) {
149 LOG.debug("Target node {} not found in path {} ", target, pathContext.getSchemaNode());
150 throw new RestconfDocumentedException("Error parsing input", ErrorType.PROTOCOL,
151 ErrorTag.MALFORMED_MESSAGE);
154 if (PatchEditOperation.isPatchOperationWithValue(operation)) {
155 NormalizedNode<?, ?> parsed = null;
156 if (schemaNode instanceof ContainerSchemaNode) {
157 parsed = parserFactory.getContainerNodeParser().parse(values, (ContainerSchemaNode) schemaNode);
158 } else if (schemaNode instanceof ListSchemaNode) {
159 parsed = parserFactory.getMapNodeParser().parse(values, (ListSchemaNode) schemaNode);
162 // for lists allow to manipulate with list items through their parent
163 if (targetII.getLastPathArgument() instanceof NodeIdentifierWithPredicates) {
164 targetII = targetII.getParent();
167 resultCollection.add(new PatchEntity(editId, operation, targetII, parsed));
169 resultCollection.add(new PatchEntity(editId, operation, targetII));
173 return new PatchContext(pathContext, ImmutableList.copyOf(resultCollection), patchId);
179 * @param element Element of current edit operation
180 * @param operation Name of current operation
181 * @return List of value elements
183 private static List<Element> readValueNodes(@Nonnull final Element element, @Nonnull final String operation) {
184 final Node valueNode = element.getElementsByTagName("value").item(0);
186 if (PatchEditOperation.isPatchOperationWithValue(operation) && valueNode == null) {
187 throw new RestconfDocumentedException("Error parsing input",
188 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
191 if (!PatchEditOperation.isPatchOperationWithValue(operation) && valueNode != null) {
192 throw new RestconfDocumentedException("Error parsing input",
193 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
196 if (valueNode == null) {
200 final List<Element> result = new ArrayList<>();
201 final NodeList childNodes = valueNode.getChildNodes();
202 for (int i = 0; i < childNodes.getLength(); i++) {
203 if (childNodes.item(i) instanceof Element) {
204 result.add((Element) childNodes.item(i));
212 * Prepare non-conditional XPath suitable for deserialization with {@link StringModuleInstanceIdentifierCodec}.
214 * @param schemaNode Top schema node
215 * @param target Edit operation target
216 * @param value Element with value
217 * @param namespace Module namespace
218 * @param revision Module revision
219 * @return Non-conditional XPath
221 private static String prepareNonCondXpath(@Nonnull final DataSchemaNode schemaNode, @Nonnull final String target,
222 @Nonnull final Element value, @Nonnull final String namespace, @Nonnull final String revision) {
223 final Iterator<String> args = SLASH_SPLITTER.split(target.substring(target.indexOf(':') + 1)).iterator();
225 final StringBuilder nonCondXpath = new StringBuilder();
226 SchemaNode childNode = schemaNode;
228 while (args.hasNext()) {
229 final String s = args.next();
230 nonCondXpath.append("/");
231 nonCondXpath.append(s);
232 childNode = ((DataNodeContainer) childNode).getDataChildByName(QName.create(namespace, revision, s));
234 if (childNode instanceof ListSchemaNode && args.hasNext()) {
235 appendKeys(nonCondXpath, ((ListSchemaNode) childNode).getKeyDefinition().iterator(), args);
239 if (childNode instanceof ListSchemaNode && value != null) {
240 final Iterator<String> keyValues = readKeyValues(value,
241 ((ListSchemaNode) childNode).getKeyDefinition().iterator());
242 appendKeys(nonCondXpath, ((ListSchemaNode) childNode).getKeyDefinition().iterator(), keyValues);
245 return nonCondXpath.toString();
249 * Read value for every list key.
251 * @param value Value element
252 * @param keys Iterator of list keys names
253 * @return Iterator of list keys values
255 private static Iterator<String> readKeyValues(@Nonnull final Element value, @Nonnull final Iterator<QName> keys) {
256 final List<String> result = new ArrayList<>();
258 while (keys.hasNext()) {
259 result.add(value.getElementsByTagName(keys.next().getLocalName()).item(0).getFirstChild().getNodeValue());
262 return result.iterator();
266 * Append key name - key value pairs for every list key to {@code nonCondXpath}.
268 * @param nonCondXpath Builder for creating non-conditional XPath
269 * @param keyNames Iterator of list keys names
270 * @param keyValues Iterator of list keys values
272 private static void appendKeys(@Nonnull final StringBuilder nonCondXpath, @Nonnull final Iterator<QName> keyNames,
273 @Nonnull final Iterator<String> keyValues) {
274 while (keyNames.hasNext()) {
275 nonCondXpath.append('[');
276 nonCondXpath.append(keyNames.next().getLocalName());
277 nonCondXpath.append("='");
278 nonCondXpath.append(keyValues.next());
279 nonCondXpath.append("']");