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);
66 public boolean isReadable(final Class<?> type, final Type genericType,
67 final Annotation[] annotations, final MediaType mediaType) {
71 @SuppressWarnings("checkstyle:IllegalCatch")
73 public PatchContext readFrom(final Class<PatchContext> type, final Type genericType,
74 final Annotation[] annotations, final MediaType mediaType,
75 final MultivaluedMap<String, String> httpHeaders, final InputStream entityStream)
76 throws IOException, WebApplicationException {
79 final InstanceIdentifierContext<?> path = getInstanceIdentifierContext();
81 if (entityStream.available() < 1) {
82 // represent empty nopayload input
83 return new PatchContext(path, null, null);
86 final Document doc = UntrustedXML.newDocumentBuilder().parse(entityStream);
87 return parse(path, doc);
88 } catch (final RestconfDocumentedException e) {
90 } catch (final Exception e) {
91 LOG.debug("Error parsing xml input", e);
93 throw new RestconfDocumentedException("Error parsing input: " + e.getMessage(), ErrorType.PROTOCOL,
94 ErrorTag.MALFORMED_MESSAGE);
98 private static PatchContext parse(final InstanceIdentifierContext<?> pathContext, final Document doc) {
99 final List<PatchEntity> resultCollection = new ArrayList<>();
100 final String patchId = doc.getElementsByTagName("patch-id").item(0).getFirstChild().getNodeValue();
101 final NodeList editNodes = doc.getElementsByTagName("edit");
102 final DomToNormalizedNodeParserFactory parserFactory =
103 DomToNormalizedNodeParserFactory.getInstance(XmlUtils.DEFAULT_XML_CODEC_PROVIDER,
104 pathContext.getSchemaContext());
106 for (int i = 0; i < editNodes.getLength(); i++) {
107 DataSchemaNode schemaNode = (DataSchemaNode) pathContext.getSchemaNode();
108 final Element element = (Element) editNodes.item(i);
109 final String operation = element.getElementsByTagName("operation").item(0).getFirstChild().getNodeValue();
110 final String editId = element.getElementsByTagName("edit-id").item(0).getFirstChild().getNodeValue();
111 final String target = element.getElementsByTagName("target").item(0).getFirstChild().getNodeValue();
112 final List<Element> values = readValueNodes(element, operation);
113 final Element firstValueElement = values != null ? values.get(0) : null;
115 // get namespace according to schema node from path context or value
116 final String namespace = (firstValueElement == null)
117 ? schemaNode.getQName().getNamespace().toString() : firstValueElement.getNamespaceURI();
119 // find module according to namespace
120 final Module module = pathContext.getSchemaContext().findModuleByNamespace(
121 URI.create(namespace)).iterator().next();
123 // initialize codec + set default prefix derived from module name
124 final StringModuleInstanceIdentifierCodec codec = new StringModuleInstanceIdentifierCodec(
125 pathContext.getSchemaContext(), module.getName());
127 // find complete path to target and target schema node
128 // target can be also empty (only slash)
129 YangInstanceIdentifier targetII;
130 final SchemaNode targetNode;
131 if (target.equals("/")) {
132 targetII = pathContext.getInstanceIdentifier();
133 targetNode = pathContext.getSchemaContext();
135 targetII = codec.deserialize(codec.serialize(pathContext.getInstanceIdentifier())
136 .concat(prepareNonCondXpath(schemaNode, target.replaceFirst("/", ""), firstValueElement,
137 namespace, module.getQNameModule().getFormattedRevision())));
139 targetNode = SchemaContextUtil.findDataSchemaNode(pathContext.getSchemaContext(),
140 codec.getDataContextTree().getChild(targetII).getDataSchemaNode().getPath().getParent());
143 schemaNode = (DataSchemaNode) SchemaContextUtil.findDataSchemaNode(pathContext.getSchemaContext(),
144 codec.getDataContextTree().getChild(targetII).getDataSchemaNode().getPath());
147 if (targetNode == null) {
148 LOG.debug("Target node {} not found in path {} ", target, pathContext.getSchemaNode());
149 throw new RestconfDocumentedException("Error parsing input", ErrorType.PROTOCOL,
150 ErrorTag.MALFORMED_MESSAGE);
152 if (PatchEditOperation.isPatchOperationWithValue(operation)) {
153 NormalizedNode<?, ?> parsed = null;
154 if (schemaNode instanceof ContainerSchemaNode) {
155 parsed = parserFactory.getContainerNodeParser().parse(values, (ContainerSchemaNode) schemaNode);
156 } else if (schemaNode instanceof ListSchemaNode) {
157 parsed = parserFactory.getMapNodeParser().parse(values, (ListSchemaNode) schemaNode);
160 // for lists allow to manipulate with list items through their parent
161 if (targetII.getLastPathArgument() instanceof NodeIdentifierWithPredicates) {
162 targetII = targetII.getParent();
165 resultCollection.add(new PatchEntity(editId, operation, targetII, parsed));
167 resultCollection.add(new PatchEntity(editId, operation, targetII));
172 return new PatchContext(pathContext, ImmutableList.copyOf(resultCollection), patchId);
178 * @param element Element of current edit operation
179 * @param operation Name of current operation
180 * @return List of value elements
182 private static List<Element> readValueNodes(@Nonnull final Element element, @Nonnull final String operation) {
183 final Node valueNode = element.getElementsByTagName("value").item(0);
185 if (PatchEditOperation.isPatchOperationWithValue(operation) && valueNode == null) {
186 throw new RestconfDocumentedException("Error parsing input",
187 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
190 if (!PatchEditOperation.isPatchOperationWithValue(operation) && valueNode != null) {
191 throw new RestconfDocumentedException("Error parsing input",
192 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
195 if (valueNode == null) {
199 final List<Element> result = new ArrayList<>();
200 final NodeList childNodes = valueNode.getChildNodes();
201 for (int i = 0; i < childNodes.getLength(); i++) {
202 if (childNodes.item(i) instanceof Element) {
203 result.add((Element) childNodes.item(i));
211 * Prepare non-conditional XPath suitable for deserialization with {@link StringModuleInstanceIdentifierCodec}.
213 * @param schemaNode Top schema node
214 * @param target Edit operation target
215 * @param value Element with value
216 * @param namespace Module namespace
217 * @param revision Module revision
218 * @return Non-conditional XPath
220 private static String prepareNonCondXpath(@Nonnull final DataSchemaNode schemaNode, @Nonnull final String target,
221 @Nonnull final Element value, @Nonnull final String namespace, @Nonnull final String revision) {
222 final Iterator<String> args = Splitter.on("/").split(target.substring(target.indexOf(':') + 1)).iterator();
224 final StringBuilder nonCondXpath = new StringBuilder();
225 SchemaNode childNode = schemaNode;
227 while (args.hasNext()) {
228 final String s = args.next();
229 nonCondXpath.append("/");
230 nonCondXpath.append(s);
231 childNode = ((DataNodeContainer) childNode).getDataChildByName(QName.create(namespace, revision, s));
233 if (childNode instanceof ListSchemaNode && args.hasNext()) {
234 appendKeys(nonCondXpath, ((ListSchemaNode) childNode).getKeyDefinition().iterator(), args);
238 if (childNode instanceof ListSchemaNode && value != null) {
239 final Iterator<String> keyValues = readKeyValues(value,
240 ((ListSchemaNode) childNode).getKeyDefinition().iterator());
241 appendKeys(nonCondXpath, ((ListSchemaNode) childNode).getKeyDefinition().iterator(), keyValues);
244 return nonCondXpath.toString();
248 * Read value for every list key.
250 * @param value Value element
251 * @param keys Iterator of list keys names
252 * @return Iterator of list keys values
254 private static Iterator<String> readKeyValues(@Nonnull final Element value, @Nonnull final Iterator<QName> keys) {
255 final List<String> result = new ArrayList<>();
257 while (keys.hasNext()) {
258 result.add(value.getElementsByTagName(keys.next().getLocalName()).item(0).getFirstChild().getNodeValue());
261 return result.iterator();
265 * Append key name - key value pairs for every list key to {@code nonCondXpath}.
267 * @param nonCondXpath Builder for creating non-conditional XPath
268 * @param keyNames Iterator of list keys names
269 * @param keyValues Iterator of list keys values
271 private static void appendKeys(@Nonnull final StringBuilder nonCondXpath, @Nonnull final Iterator<QName> keyNames,
272 @Nonnull final Iterator<String> keyValues) {
273 while (keyNames.hasNext()) {
274 nonCondXpath.append("[");
275 nonCondXpath.append(keyNames.next().getLocalName());
276 nonCondXpath.append("=");
277 nonCondXpath.append("'");
278 nonCondXpath.append(keyValues.next());
279 nonCondXpath.append("'");
280 nonCondXpath.append("]");