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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2021 Pantheon.tech
* Modifications (C) 2021 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 static java.util.stream.Collectors.groupingBy;
import static java.util.stream.Collectors.mapping;
import static java.util.stream.Collectors.toUnmodifiableList;
import static java.util.stream.Collectors.toUnmodifiableMap;
import com.google.common.collect.ImmutableMap;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;
import org.onap.cps.spi.model.DataNode;
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public class DataMapUtils {
/**
* Converts DataNode structure into a map including the root node identifier for a JSON response.
*
* @param dataNode data node object
* @return a map representing same data with the root node identifier
*/
public static Map<String, Object> toDataMapWithIdentifier(final DataNode dataNode) {
return ImmutableMap.<String, Object>builder()
.put(getNodeIdentifier(dataNode.getXpath()), toDataMap(dataNode))
.build();
}
/**
* Converts DataNode structure into a map for a JSON response.
*
* @param dataNode data node object
* @return a map representing same data
*/
public static Map<String, Object> toDataMap(final DataNode dataNode) {
return ImmutableMap.<String, Object>builder()
.putAll(dataNode.getLeaves())
.putAll(listElementsAsMap(dataNode.getChildDataNodes()))
.putAll(containerElementsAsMap(dataNode.getChildDataNodes()))
.build();
}
private static Map<String, Object> listElementsAsMap(final Collection<DataNode> dataNodes) {
if (dataNodes.isEmpty()) {
return Collections.emptyMap();
}
return ImmutableMap.<String, Object>builder()
.putAll(
dataNodes.stream()
.filter(dataNode -> isListElement(dataNode.getXpath()))
.collect(groupingBy(
dataNode -> getNodeIdentifier(dataNode.getXpath()),
mapping(DataMapUtils::toDataMap, toUnmodifiableList())
))
).build();
}
private static Map<String, Object> containerElementsAsMap(final Collection<DataNode> dataNodes) {
if (dataNodes.isEmpty()) {
return Collections.emptyMap();
}
return dataNodes.stream()
.filter(dataNode -> isContainerNode(dataNode.getXpath()))
.collect(
toUnmodifiableMap(
dataNode -> getNodeIdentifier(dataNode.getXpath()),
DataMapUtils::toDataMap
));
}
private static String getNodeIdentifier(final String xpath) {
final int fromIndex = xpath.lastIndexOf("/") + 1;
final int toIndex = xpath.indexOf("[", fromIndex);
return toIndex > 0 ? xpath.substring(fromIndex, toIndex) : xpath.substring(fromIndex);
}
private static boolean isContainerNode(final String xpath) {
return !isListElement(xpath);
}
private static boolean isListElement(final String xpath) {
return xpath.endsWith("]");
}
}
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