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authorRuslan Kashapov <ruslan.kashapov@pantheon.tech>2021-02-01 10:47:25 +0200
committerRuslan Kashapov <ruslan.kashapov@pantheon.tech>2021-02-04 17:45:06 +0200
commit20983922daff86e3282bc5e2da900a8ab1cc82ed (patch)
treeebc3adfc2baf69187be5585c64e01451390bbeef /cps-service/src/main
parent5e1a5a7bde3a1650b86e2d22edde26520439757f (diff)
Fetching data node by xpath - rest and service layers
IssueID: CPS-71 Change-Id: I54801fc12a8aa700d85e774780c9990b7f19c747 Signed-off-by: Ruslan Kashapov <ruslan.kashapov@pantheon.tech>
Diffstat (limited to 'cps-service/src/main')
-rw-r--r--cps-service/src/main/java/org/onap/cps/api/CpsDataService.java18
-rw-r--r--cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java8
-rw-r--r--cps-service/src/main/java/org/onap/cps/spi/FetchChildrenOption.java25
-rw-r--r--cps-service/src/main/java/org/onap/cps/utils/DataMapUtils.java98
4 files changed, 149 insertions, 0 deletions
diff --git a/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java b/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java
index a8f49655a4..7960d12ef0 100644
--- a/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java
+++ b/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java
@@ -1,6 +1,7 @@
/*
* ============LICENSE_START=======================================================
* Copyright (C) 2020 Nordix Foundation
+ * Modifications 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.
@@ -20,12 +21,15 @@
package org.onap.cps.api;
import org.checkerframework.checker.nullness.qual.NonNull;
+import org.onap.cps.spi.FetchDescendantsOption;
import org.onap.cps.spi.exceptions.DataValidationException;
+import org.onap.cps.spi.model.DataNode;
/*
* Datastore interface for handling CPS data.
*/
public interface CpsDataService {
+
/**
* Persists data for the given anchor and dataspace.
*
@@ -35,4 +39,18 @@ public interface CpsDataService {
* @throws DataValidationException when json data is invalid
*/
void saveData(@NonNull String dataspaceName, @NonNull String anchorName, @NonNull String jsonData);
+
+ /**
+ * Retrieves datanode by XPath for given dataspace and anchor.
+ *
+ * @param dataspaceName dataspace name
+ * @param anchorName anchor name
+ * @param xpath xpath
+ * @param fetchDescendantsOption defines the scope of data to fetch: either single node or all the descendant nodes
+ * (recursively) as well
+ * @return data node object
+ */
+ DataNode getDataNode(@NonNull String dataspaceName, @NonNull String anchorName, @NonNull String xpath,
+ @NonNull FetchDescendantsOption fetchDescendantsOption);
+
}
diff --git a/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java b/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java
index 2a1e18b6d5..26990de754 100644
--- a/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java
+++ b/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java
@@ -2,6 +2,7 @@
* ============LICENSE_START=======================================================
* Copyright (C) 2021 Nordix Foundation
* Modifications Copyright (C) 2020 Bell Canada. All rights reserved.
+ * Modifications 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.
@@ -24,6 +25,7 @@ import org.onap.cps.api.CpsAdminService;
import org.onap.cps.api.CpsDataService;
import org.onap.cps.api.CpsModuleService;
import org.onap.cps.spi.CpsDataPersistenceService;
+import org.onap.cps.spi.FetchDescendantsOption;
import org.onap.cps.spi.model.Anchor;
import org.onap.cps.spi.model.DataNode;
import org.onap.cps.spi.model.DataNodeBuilder;
@@ -60,4 +62,10 @@ public class CpsDataServiceImpl implements CpsDataService {
private SchemaContext getSchemaContext(final String dataspaceName, final String schemaSetName) {
return yangTextSchemaSourceSetCache.get(dataspaceName, schemaSetName).getSchemaContext();
}
+
+ @Override
+ public DataNode getDataNode(final String dataspaceName, final String anchorName, final String xpath,
+ final FetchDescendantsOption fetchDescendantsOption) {
+ return cpsDataPersistenceService.getDataNode(dataspaceName, anchorName, xpath, fetchDescendantsOption);
+ }
} \ No newline at end of file
diff --git a/cps-service/src/main/java/org/onap/cps/spi/FetchChildrenOption.java b/cps-service/src/main/java/org/onap/cps/spi/FetchChildrenOption.java
new file mode 100644
index 0000000000..97712c128c
--- /dev/null
+++ b/cps-service/src/main/java/org/onap/cps/spi/FetchChildrenOption.java
@@ -0,0 +1,25 @@
+/*
+ * ============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.spi;
+
+public enum FetchChildrenOption {
+ OMIT_CHILDREN,
+ INCLUDE_ALL_CHILDREN
+}
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 0000000000..3ec4764bd6
--- /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("]");
+ }
+}