--- /dev/null
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2024 Nordix 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.utils;
+
+import com.google.gson.JsonSyntaxException;
+import com.google.gson.stream.JsonReader;
+import java.io.IOException;
+import java.io.StringReader;
+import java.net.URISyntaxException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.transform.TransformerException;
+import lombok.RequiredArgsConstructor;
+import org.onap.cps.cpspath.parser.CpsPathUtil;
+import org.onap.cps.cpspath.parser.PathParsingException;
+import org.onap.cps.spi.exceptions.DataValidationException;
+import org.opendaylight.yangtools.yang.common.QName;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
+import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
+import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.api.schema.builder.DataContainerNodeBuilder;
+import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
+import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactory;
+import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactorySupplier;
+import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
+import org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream;
+import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
+import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
+import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
+import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
+import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
+import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
+import org.opendaylight.yangtools.yang.model.api.EffectiveStatementInference;
+import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier;
+import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;
+import org.springframework.stereotype.Service;
+import org.xml.sax.SAXException;
+
+@Service
+@RequiredArgsConstructor
+public class YangParserHelper {
+
+ static final String DATA_ROOT_NODE_NAMESPACE = "urn:ietf:params:xml:ns:netconf:base:1.0";
+ static final String DATA_ROOT_NODE_TAG_NAME = "data";
+
+ /**
+ * Parses data into NormalizedNode according to given schema context.
+ *
+ * @param contentType the type of the node data (json or xml)
+ * @param nodeData data string
+ * @param schemaContext schema context describing associated data model
+ * @param parentNodeXpath the xpath referencing the parent node current data fragment belong to
+ * @return the NormalizedNode object
+ */
+ public ContainerNode parseData(final ContentType contentType,
+ final String nodeData,
+ final SchemaContext schemaContext,
+ final String parentNodeXpath) {
+ if (contentType == ContentType.JSON) {
+ return parseJsonData(nodeData, schemaContext, parentNodeXpath);
+ }
+ return parseXmlData(nodeData, schemaContext, parentNodeXpath);
+ }
+
+ private ContainerNode parseJsonData(final String jsonData,
+ final SchemaContext schemaContext,
+ final String parentNodeXpath) {
+ final JSONCodecFactory jsonCodecFactory = JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02
+ .getShared((EffectiveModelContext) schemaContext);
+ final DataContainerNodeBuilder<YangInstanceIdentifier.NodeIdentifier, ContainerNode> dataContainerNodeBuilder =
+ Builders.containerBuilder()
+ .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(
+ QName.create(DATA_ROOT_NODE_NAMESPACE, DATA_ROOT_NODE_TAG_NAME)
+ ));
+ final NormalizedNodeStreamWriter normalizedNodeStreamWriter = ImmutableNormalizedNodeStreamWriter
+ .from(dataContainerNodeBuilder);
+ final JsonReader jsonReader = new JsonReader(new StringReader(jsonData));
+ final JsonParserStream jsonParserStream;
+
+ if (parentNodeXpath.isEmpty()) {
+ jsonParserStream = JsonParserStream.create(normalizedNodeStreamWriter, jsonCodecFactory);
+ } else {
+ final Collection<QName> dataSchemaNodeIdentifiers
+ = getDataSchemaNodeIdentifiers(schemaContext, parentNodeXpath);
+ final EffectiveModelContext effectiveModelContext = ((EffectiveModelContext) schemaContext);
+ final EffectiveStatementInference effectiveStatementInference =
+ SchemaInferenceStack.of(effectiveModelContext,
+ SchemaNodeIdentifier.Absolute.of(dataSchemaNodeIdentifiers)).toInference();
+ jsonParserStream =
+ JsonParserStream.create(normalizedNodeStreamWriter, jsonCodecFactory, effectiveStatementInference);
+ }
+
+ try (jsonParserStream) {
+ jsonParserStream.parse(jsonReader);
+ } catch (final IOException | JsonSyntaxException exception) {
+ throw new DataValidationException(
+ "Failed to parse json data: " + jsonData, exception.getMessage(), exception);
+ } catch (final IllegalStateException | IllegalArgumentException exception) {
+ throw new DataValidationException(
+ "Failed to parse json data. Unsupported xpath or json data:" + jsonData, exception
+ .getMessage(), exception);
+ }
+ return dataContainerNodeBuilder.build();
+ }
+
+ private ContainerNode parseXmlData(final String xmlData,
+ final SchemaContext schemaContext,
+ final String parentNodeXpath) {
+ final XMLInputFactory factory = XMLInputFactory.newInstance();
+ factory.setProperty(XMLInputFactory.SUPPORT_DTD, false);
+ final NormalizedNodeResult normalizedNodeResult = new NormalizedNodeResult();
+ final NormalizedNodeStreamWriter normalizedNodeStreamWriter = ImmutableNormalizedNodeStreamWriter
+ .from(normalizedNodeResult);
+
+ final EffectiveModelContext effectiveModelContext = (EffectiveModelContext) schemaContext;
+ final XmlParserStream xmlParserStream;
+ final String preparedXmlContent;
+ try {
+ if (parentNodeXpath.isEmpty()) {
+ preparedXmlContent = XmlFileUtils.prepareXmlContent(xmlData, schemaContext);
+ xmlParserStream = XmlParserStream.create(normalizedNodeStreamWriter, effectiveModelContext);
+ } else {
+ final DataSchemaNode parentSchemaNode =
+ (DataSchemaNode) getDataSchemaNodeAndIdentifiersByXpath(parentNodeXpath, schemaContext)
+ .get("dataSchemaNode");
+ final Collection<QName> dataSchemaNodeIdentifiers =
+ getDataSchemaNodeIdentifiers(schemaContext, parentNodeXpath);
+ final EffectiveStatementInference effectiveStatementInference =
+ SchemaInferenceStack.of(effectiveModelContext,
+ SchemaNodeIdentifier.Absolute.of(dataSchemaNodeIdentifiers)).toInference();
+ preparedXmlContent = XmlFileUtils.prepareXmlContent(xmlData, parentSchemaNode, parentNodeXpath);
+ xmlParserStream = XmlParserStream.create(normalizedNodeStreamWriter, effectiveStatementInference);
+ }
+
+ try (xmlParserStream;
+ StringReader stringReader = new StringReader(preparedXmlContent)) {
+ final XMLStreamReader xmlStreamReader = factory.createXMLStreamReader(stringReader);
+ xmlParserStream.parse(xmlStreamReader);
+ }
+ } catch (final XMLStreamException | URISyntaxException | IOException | SAXException | NullPointerException
+ | ParserConfigurationException | TransformerException exception) {
+ throw new DataValidationException(
+ "Failed to parse xml data: " + xmlData, exception.getMessage(), exception);
+ }
+ final DataContainerChild dataContainerChild =
+ (DataContainerChild) getFirstChildXmlRoot(normalizedNodeResult.getResult());
+ final YangInstanceIdentifier.NodeIdentifier nodeIdentifier =
+ new YangInstanceIdentifier.NodeIdentifier(dataContainerChild.getIdentifier().getNodeType());
+ return Builders.containerBuilder().withChild(dataContainerChild).withNodeIdentifier(nodeIdentifier).build();
+ }
+
+ private static Collection<QName> getDataSchemaNodeIdentifiers(final SchemaContext schemaContext,
+ final String parentNodeXpath) {
+ return (Collection<QName>) getDataSchemaNodeAndIdentifiersByXpath(parentNodeXpath, schemaContext)
+ .get("dataSchemaNodeIdentifiers");
+ }
+
+ private static Map<String, Object> getDataSchemaNodeAndIdentifiersByXpath(final String parentNodeXpath,
+ final SchemaContext schemaContext) {
+ final String[] xpathNodeIdSequence = xpathToNodeIdSequence(parentNodeXpath);
+ return findDataSchemaNodeAndIdentifiersByXpathNodeIdSequence(xpathNodeIdSequence, schemaContext.getChildNodes(),
+ new ArrayList<>());
+ }
+
+ private static String[] xpathToNodeIdSequence(final String xpath) {
+ try {
+ return CpsPathUtil.getXpathNodeIdSequence(xpath);
+ } catch (final PathParsingException pathParsingException) {
+ throw new DataValidationException(pathParsingException.getMessage(), pathParsingException.getDetails(),
+ pathParsingException);
+ }
+ }
+
+ private static Map<String, Object> findDataSchemaNodeAndIdentifiersByXpathNodeIdSequence(
+ final String[] xpathNodeIdSequence,
+ final Collection<? extends DataSchemaNode> dataSchemaNodes,
+ final Collection<QName> dataSchemaNodeIdentifiers) {
+ final String currentXpathNodeId = xpathNodeIdSequence[0];
+ final DataSchemaNode currentDataSchemaNode = dataSchemaNodes.stream()
+ .filter(dataSchemaNode -> currentXpathNodeId.equals(dataSchemaNode.getQName().getLocalName()))
+ .findFirst().orElseThrow(() -> schemaNodeNotFoundException(currentXpathNodeId));
+ dataSchemaNodeIdentifiers.add(currentDataSchemaNode.getQName());
+ if (xpathNodeIdSequence.length <= 1) {
+ final Map<String, Object> dataSchemaNodeAndIdentifiers =
+ new HashMap<>();
+ dataSchemaNodeAndIdentifiers.put("dataSchemaNode", currentDataSchemaNode);
+ dataSchemaNodeAndIdentifiers.put("dataSchemaNodeIdentifiers", dataSchemaNodeIdentifiers);
+ return dataSchemaNodeAndIdentifiers;
+ }
+ if (currentDataSchemaNode instanceof DataNodeContainer) {
+ return findDataSchemaNodeAndIdentifiersByXpathNodeIdSequence(
+ getNextLevelXpathNodeIdSequence(xpathNodeIdSequence),
+ ((DataNodeContainer) currentDataSchemaNode).getChildNodes(),
+ dataSchemaNodeIdentifiers);
+ }
+ throw schemaNodeNotFoundException(xpathNodeIdSequence[1]);
+ }
+
+ private static String[] getNextLevelXpathNodeIdSequence(final String[] xpathNodeIdSequence) {
+ final String[] nextXpathNodeIdSequence = new String[xpathNodeIdSequence.length - 1];
+ System.arraycopy(xpathNodeIdSequence, 1, nextXpathNodeIdSequence, 0, nextXpathNodeIdSequence.length);
+ return nextXpathNodeIdSequence;
+ }
+
+ private static DataValidationException schemaNodeNotFoundException(final String schemaNodeIdentifier) {
+ return new DataValidationException("Invalid xpath.",
+ String.format("No schema node was found for xpath identifier '%s'.", schemaNodeIdentifier));
+ }
+
+ private static NormalizedNode getFirstChildXmlRoot(final NormalizedNode parent) {
+ final String rootNodeType = parent.getIdentifier().getNodeType().getLocalName();
+ final Collection<DataContainerChild> children = (Collection<DataContainerChild>) parent.body();
+ final Iterator<DataContainerChild> iterator = children.iterator();
+ NormalizedNode child = null;
+ while (iterator.hasNext()) {
+ child = iterator.next();
+ if (!child.getIdentifier().getNodeType().getLocalName().equals(rootNodeType)
+ && !(child instanceof LeafNode)) {
+ return child;
+ }
+ }
+ return getFirstChildXmlRoot(child);
+ }
+}
Code Review / cps.git / blobdiff