* ============LICENSE_START=======================================================
* Copyright (C) 2020 Nordix Foundation
* Modifications Copyright (C) 2021 Bell Canada. All rights reserved.
+ * Modifications Copyright (C) 2021 Pantheon.tech
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
import com.google.gson.stream.JsonReader;
import java.io.IOException;
import java.io.StringReader;
+import java.util.Arrays;
+import java.util.Collection;
import java.util.Collections;
import java.util.List;
+import java.util.Optional;
import java.util.stream.Collectors;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.onap.cps.spi.exceptions.DataValidationException;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
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.SchemaContext;
@Slf4j
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
public class YangUtils {
+ private static final String XPATH_DELIMITER_REGEX = "\\/";
+ private static final String XPATH_NODE_KEY_ATTRIBUTES_REGEX = "\\[.+";
- private YangUtils() {
- // Private constructor fo security reasons
+ /**
+ * Parses jsonData into NormalizedNode according to given schema context.
+ *
+ * @param jsonData json data as string
+ * @param schemaContext schema context describing associated data model
+ * @return the NormalizedNode object
+ */
+ public static NormalizedNode<?, ?> parseJsonData(final String jsonData, final SchemaContext schemaContext) {
+ return parseJsonData(jsonData, schemaContext, Optional.empty());
}
/**
- * Parse a string containing json data for a certain model (schemaContext).
+ * Parses jsonData into NormalizedNode according to given schema context.
*
- * @param jsonData a string containing json data for the given model
- * @param schemaContext the SchemaContext for the given data
- * @return the NormalizedNode representing the json data
+ * @param jsonData json data fragment as 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 static NormalizedNode<?, ?> parseJsonData(final String jsonData, final SchemaContext schemaContext) {
+ public static NormalizedNode<?, ?> parseJsonData(final String jsonData, final SchemaContext schemaContext,
+ final String parentNodeXpath) {
+ final DataSchemaNode parentSchemaNode = getDataSchemaNodeByXpath(parentNodeXpath, schemaContext);
+ return parseJsonData(jsonData, schemaContext, Optional.of(parentSchemaNode));
+ }
+
+ private static NormalizedNode<?, ?> parseJsonData(final String jsonData, final SchemaContext schemaContext,
+ final Optional<DataSchemaNode> optionalParentSchemaNode) {
final JSONCodecFactory jsonCodecFactory = JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02
- .getShared(schemaContext);
+ .getShared(schemaContext);
final NormalizedNodeResult normalizedNodeResult = new NormalizedNodeResult();
final NormalizedNodeStreamWriter normalizedNodeStreamWriter = ImmutableNormalizedNodeStreamWriter
- .from(normalizedNodeResult);
- try {
- try (final JsonParserStream jsonParserStream = JsonParserStream
- .create(normalizedNodeStreamWriter, jsonCodecFactory)) {
- final JsonReader jsonReader = new JsonReader(new StringReader(jsonData));
- jsonParserStream.parse(jsonReader);
- }
- } catch (final IOException e) {
+ .from(normalizedNodeResult);
+
+ try (final JsonParserStream jsonParserStream = optionalParentSchemaNode.isPresent()
+ ? JsonParserStream.create(normalizedNodeStreamWriter, jsonCodecFactory, optionalParentSchemaNode.get())
+ : JsonParserStream.create(normalizedNodeStreamWriter, jsonCodecFactory)
+ ) {
+ final JsonReader jsonReader = new JsonReader(new StringReader(jsonData));
+ jsonParserStream.parse(jsonReader);
+
+ } catch (final IOException | IllegalStateException e) {
throw new DataValidationException("Failed to parse json data.", String
.format("Exception occurred on parsing string %s.", jsonData), e);
}
/**
* Create an xpath form a Yang Tools NodeIdentifier (i.e. PathArgument).
+ *
* @param nodeIdentifier the NodeIdentifier
* @return an xpath
*/
if (nodeIdentifier instanceof YangInstanceIdentifier.NodeIdentifierWithPredicates) {
xpathBuilder.append(getKeyAttributesStatement(
- (YangInstanceIdentifier.NodeIdentifierWithPredicates) nodeIdentifier));
+ (YangInstanceIdentifier.NodeIdentifierWithPredicates) nodeIdentifier));
}
return xpathBuilder.toString();
}
private static String getKeyAttributesStatement(
- final YangInstanceIdentifier.NodeIdentifierWithPredicates nodeIdentifier) {
+ final YangInstanceIdentifier.NodeIdentifierWithPredicates nodeIdentifier) {
final List<String> keyAttributes = nodeIdentifier.entrySet().stream().map(
entry -> {
final String name = entry.getKey().getLocalName();
return "[" + String.join(" and ", keyAttributes) + "]";
}
}
+
+ private static DataSchemaNode getDataSchemaNodeByXpath(final String parentNodeXpath,
+ final SchemaContext schemaContext) {
+ final String[] xpathNodeIdSequence = xpathToNodeIdSequence(parentNodeXpath);
+ return findDataSchemaNodeByXpathNodeIdSequence(xpathNodeIdSequence, schemaContext.getChildNodes());
+ }
+
+ private static String[] xpathToNodeIdSequence(final String xpath) {
+ final String[] xpathNodeIdSequence = Arrays.stream(xpath.split(XPATH_DELIMITER_REGEX))
+ .map(identifier -> identifier.replaceFirst(XPATH_NODE_KEY_ATTRIBUTES_REGEX, ""))
+ .filter(identifier -> !identifier.isEmpty())
+ .toArray(String[]::new);
+ if (xpathNodeIdSequence.length < 1) {
+ throw new DataValidationException("Invalid xpath.", "Xpath contains no node identifiers.");
+ }
+ return xpathNodeIdSequence;
+ }
+
+ private static DataSchemaNode findDataSchemaNodeByXpathNodeIdSequence(final String[] xpathNodeIdSequence,
+ final Collection<? extends DataSchemaNode> dataSchemaNodes) {
+ final String currentXpathNodeId = xpathNodeIdSequence[0];
+ final DataSchemaNode currentDataSchemaNode = dataSchemaNodes.stream()
+ .filter(dataSchemaNode -> currentXpathNodeId.equals(dataSchemaNode.getQName().getLocalName()))
+ .findFirst().orElseThrow(() -> schemaNodeNotFoundException(currentXpathNodeId));
+ if (xpathNodeIdSequence.length <= 1) {
+ return currentDataSchemaNode;
+ }
+ if (currentDataSchemaNode instanceof DataNodeContainer) {
+ return findDataSchemaNodeByXpathNodeIdSequence(
+ getNextLevelXpathNodeIdSequence(xpathNodeIdSequence),
+ ((DataNodeContainer) currentDataSchemaNode).getChildNodes());
+ }
+ 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));
+ }
}
Code Review / cps.git / blobdiff