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Diffstat (limited to 'cps-service/src/main/java/org/onap/cps/utils/DataMapUtils.java')
-rw-r--r-- | cps-service/src/main/java/org/onap/cps/utils/DataMapUtils.java | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/cps-service/src/main/java/org/onap/cps/utils/DataMapUtils.java b/cps-service/src/main/java/org/onap/cps/utils/DataMapUtils.java new file mode 100644 index 000000000..3ec4764bd --- /dev/null +++ b/cps-service/src/main/java/org/onap/cps/utils/DataMapUtils.java @@ -0,0 +1,98 @@ +/* + * ============LICENSE_START======================================================= + * 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. + * 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; + +/* + TODO: this utility class belongs to REST, however it expected to be used by both CPS Core and xNF Proxy; + placed in cps-service until shared module is done for REST services, then to be moved there + */ +@NoArgsConstructor(access = AccessLevel.PRIVATE) +public class DataMapUtils { + + /** + * 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 -> isListNode(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 !isListNode(xpath); + } + + private static boolean isListNode(final String xpath) { + return xpath.endsWith("]"); + } +} |