org.opendaylight.yangtools.yang.data.util.ParserStreamUtils Maven / Gradle / Ivy
/*
* Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.yangtools.yang.data.util;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Deque;
import org.opendaylight.yangtools.yang.common.Revision;
import org.opendaylight.yangtools.yang.common.XMLNamespace;
import org.opendaylight.yangtools.yang.model.api.ChoiceSchemaNode;
import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
public final class ParserStreamUtils {
private ParserStreamUtils() {
// Hidden on purpose
}
/**
* Returns stack of schema nodes via which it was necessary to pass to get schema node with specified
* {@code childName} and {@code namespace}.
*
* @return stack of schema nodes via which it was passed through. If found schema node is direct child then stack
* contains only one node. If it is found under choice and case then stack should contains 2*n+1 element
* (where n is number of choices through it was passed)
*/
public static Deque findSchemaNodeByNameAndNamespace(final DataSchemaNode dataSchemaNode,
final String childName, final XMLNamespace namespace) {
final var result = new ArrayDeque();
final var childChoices = new ArrayList();
DataSchemaNode potentialChildNode = null;
if (dataSchemaNode instanceof DataNodeContainer dataContainer) {
for (final var childNode : dataContainer.getChildNodes()) {
if (childNode instanceof ChoiceSchemaNode choice) {
childChoices.add(choice);
} else {
final var childQName = childNode.getQName();
if (childQName.getLocalName().equals(childName) && childQName.getNamespace().equals(namespace)
&& (potentialChildNode == null || Revision.compare(childQName.getRevision(),
potentialChildNode.getQName().getRevision()) > 0)) {
potentialChildNode = childNode;
}
}
}
}
if (potentialChildNode != null) {
result.push(potentialChildNode);
return result;
}
// try to find data schema node in choice (looking for first match)
for (final var choiceNode : childChoices) {
for (final var concreteCase : choiceNode.getCases()) {
final var resultFromRecursion = findSchemaNodeByNameAndNamespace(concreteCase, childName, namespace);
if (!resultFromRecursion.isEmpty()) {
resultFromRecursion.push(concreteCase);
resultFromRecursion.push(choiceNode);
return resultFromRecursion;
}
}
}
return result;
}
}