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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2020 Nordix Foundation
* Modifications Copyright (C) 2021 Bell Canada. All rights reserved.
* ================================================================================
* 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.stream.JsonReader;
import java.io.IOException;
import java.io.StringReader;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
import lombok.extern.slf4j.Slf4j;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
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.impl.schema.ImmutableNormalizedNodeStreamWriter;
import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
import org.opendaylight.yangtools.yang.model.api.SchemaContext;
@Slf4j
public class YangUtils {
private YangUtils() {
// Private constructor fo security reasons
}
/**
* Parse a string containing json data for a certain model (schemaContext).
*
* @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
*/
public static NormalizedNode parseJsonData(final String jsonData, final SchemaContext schemaContext)
throws IOException {
final JSONCodecFactory jsonCodecFactory = JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02
.getShared(schemaContext);
final NormalizedNodeResult normalizedNodeResult = new NormalizedNodeResult();
final NormalizedNodeStreamWriter normalizedNodeStreamWriter = ImmutableNormalizedNodeStreamWriter
.from(normalizedNodeResult);
try (final JsonParserStream jsonParserStream = JsonParserStream
.create(normalizedNodeStreamWriter, jsonCodecFactory)) {
final JsonReader jsonReader = new JsonReader(new StringReader(jsonData));
jsonParserStream.parse(jsonReader);
}
return normalizedNodeResult.getResult();
}
/**
* Create an xpath form a Yang Tools NodeIdentifier (i.e. PathArgument).
* @param nodeIdentifier the NodeIdentifier
* @return an xpath
*/
public static String buildXpath(final YangInstanceIdentifier.PathArgument nodeIdentifier) {
final StringBuilder xpathBuilder = new StringBuilder();
xpathBuilder.append("/").append(nodeIdentifier.getNodeType().getLocalName());
if (nodeIdentifier instanceof YangInstanceIdentifier.NodeIdentifierWithPredicates) {
xpathBuilder.append(getKeyAttributesStatement(
(YangInstanceIdentifier.NodeIdentifierWithPredicates) nodeIdentifier));
}
return xpathBuilder.toString();
}
private static String getKeyAttributesStatement(
final YangInstanceIdentifier.NodeIdentifierWithPredicates nodeIdentifier) {
final List<String> keyAttributes = nodeIdentifier.entrySet().stream().map(
entry -> {
final String name = entry.getKey().getLocalName();
final String value = String.valueOf(entry.getValue()).replace("'", "\\'");
return String.format("@%s='%s'", name, value);
}
).collect(Collectors.toList());
if (keyAttributes.isEmpty()) {
return "";
} else {
Collections.sort(keyAttributes);
return "[" + String.join(" and ", keyAttributes) + "]";
}
}
}
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