/* * Copyright (c) 2020 PANTHEON.tech, s.r.o. 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.restconf.common.serializer; import java.util.ArrayDeque; import java.util.Collection; import java.util.Deque; import java.util.Map; import java.util.Set; import org.opendaylight.yangtools.yang.common.QName; import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier; import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument; import org.opendaylight.yangtools.yang.data.api.schema.LeafNode; import org.opendaylight.yangtools.yang.data.api.schema.LeafSetNode; import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode; import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate; import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode; import org.opendaylight.yangtools.yang.data.api.schema.tree.ModificationType; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public abstract class AbstractWebsocketSerializer { private static final Logger LOG = LoggerFactory.getLogger(AbstractWebsocketSerializer.class); public void serialize(final DataTreeCandidate candidate, final boolean leafNodesOnly, final boolean skipData) throws T { final Deque path = new ArrayDeque<>(); path.addAll(candidate.getRootPath().getPathArguments()); if (leafNodesOnly) { serializeLeafNodesOnly(path, candidate.getRootNode(), skipData); return; } serializeData(path, candidate.getRootNode(), skipData); } void serializeLeafNodesOnly(final Deque path, final DataTreeCandidateNode candidate, final boolean skipData) throws T { NormalizedNode node = null; switch (candidate.getModificationType()) { case UNMODIFIED: // no reason to do anything with an unmodified node LOG.debug("DataTreeCandidate for a notification is unmodified, not serializing leaves. Candidate: {}", candidate); break; case SUBTREE_MODIFIED: case WRITE: case APPEARED: node = candidate.getDataAfter().get(); break; case DELETE: case DISAPPEARED: node = candidate.getDataBefore().get(); break; default: LOG.error("DataTreeCandidate modification has unknown type: {}", candidate.getModificationType()); } if (node == null) { return; } if (node instanceof LeafNode || node instanceof LeafSetNode) { serializeData(path, candidate, skipData); return; } for (DataTreeCandidateNode childNode : candidate.getChildNodes()) { path.add(childNode.getIdentifier()); serializeLeafNodesOnly(path, childNode, skipData); path.removeLast(); } } abstract void serializeData(Collection path, DataTreeCandidateNode candidate, boolean skipData) throws T; abstract void serializePath(Collection pathArguments) throws T; abstract void serializeOperation(DataTreeCandidateNode candidate) throws T; String convertPath(final Collection path) { final StringBuilder pathBuilder = new StringBuilder(); for (PathArgument pathArgument : path) { pathBuilder.append("/"); pathBuilder.append(pathArgument.getNodeType().getNamespace().toString().replaceAll(":", "-")); pathBuilder.append(":"); pathBuilder.append(pathArgument.getNodeType().getLocalName()); if (pathArgument instanceof YangInstanceIdentifier.NodeIdentifierWithPredicates) { pathBuilder.append("["); final Set> keys = ((YangInstanceIdentifier.NodeIdentifierWithPredicates) pathArgument).entrySet(); for (Map.Entry key : keys) { pathBuilder.append(key.getKey().getNamespace().toString().replaceAll(":", "-")); pathBuilder.append(":"); pathBuilder.append(key.getKey().getLocalName()); pathBuilder.append("='"); pathBuilder.append(key.getValue().toString()); pathBuilder.append("'"); } pathBuilder.append("]"); } } return pathBuilder.toString(); } String modificationTypeToOperation(final DataTreeCandidateNode candidate, final ModificationType modificationType) { switch (modificationType) { case UNMODIFIED: // shouldn't ever happen since the root of a modification is only triggered by some event LOG.warn("DataTreeCandidate for a notification is unmodified. Candidate: {}", candidate); return "none"; case SUBTREE_MODIFIED: case WRITE: case APPEARED: if (candidate.getDataBefore().isPresent()) { return "updated"; } else { return "created"; } case DELETE: case DISAPPEARED: return "deleted"; default: LOG.error("DataTreeCandidate modification has unknown type: {}", candidate.getModificationType()); throw new IllegalStateException("Unknown modification type"); } } }