Create list-node elements (part1): CPS service and persistence layers

+ fix integrity violation exception exposed out of persistence layer
+ refactor CpsDataServiceImplSpec to eliminate repeated code

Issue-ID: CPS-360
Change-Id: Id70341fe54bf3c31af661f6aae04a7a80f4a1e9d
Signed-off-by: Ruslan Kashapov <ruslan.kashapov@pantheon.tech>

5 files changed, 119 insertions, 50 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 8552c6c0d8..8e59ebcbb0 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
@@ -57,6 +57,21 @@ public interface CpsDataService {
         @NonNull String jsonData);
 
     /**
+     * Persists child data fragment representing list-node (with one or more elements) under existing data node
+     * for the given anchor and dataspace.
+     *
+     * @param dataspaceName   dataspace name
+     * @param anchorName      anchor name
+     * @param parentNodeXpath parent node xpath
+     * @param jsonData        json data representing list element
+     * @throws DataValidationException   when json data is invalid (incl. list-node being empty)
+     * @throws DataNodeNotFoundException when parent node cannot be found by parent node xpath
+     * @throws AlreadyDefinedException   when any of child data nodes is having xpath of already existing node
+     */
+    void saveListNodeData(@NonNull String dataspaceName, @NonNull String anchorName, @NonNull String parentNodeXpath,
+        @NonNull String jsonData);
+
+    /**
      * Retrieves datanode by XPath for given dataspace and anchor.
      *
      * @param dataspaceName          dataspace name
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 fd0f76b536..523657a7fc 100755
--- 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
@@ -21,11 +21,13 @@
 
 package org.onap.cps.api.impl;
 
+import java.util.Collection;
 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.exceptions.DataValidationException;
 import org.onap.cps.spi.model.DataNode;
 import org.onap.cps.spi.model.DataNodeBuilder;
 import org.onap.cps.utils.YangUtils;
@@ -65,6 +67,17 @@ public class CpsDataServiceImpl implements CpsDataService {
     }
 
     @Override
+    public void saveListNodeData(final String dataspaceName, final String anchorName,
+        final String parentNodeXpath, final String jsonData) {
+        final Collection<DataNode> dataNodesCollection =
+            buildDataNodeCollectionFromJson(dataspaceName, anchorName, parentNodeXpath, jsonData);
+        if (dataNodesCollection.isEmpty()) {
+            throw new DataValidationException("Invalid list data.", "List node is empty.");
+        }
+        cpsDataPersistenceService.addListDataNodes(dataspaceName, anchorName, parentNodeXpath, dataNodesCollection);
+    }
+
+    @Override
     public DataNode getDataNode(final String dataspaceName, final String anchorName, final String xpath,
         final FetchDescendantsOption fetchDescendantsOption) {
         return cpsDataPersistenceService.getDataNode(dataspaceName, anchorName, xpath, fetchDescendantsOption);
@@ -103,6 +116,19 @@ public class CpsDataServiceImpl implements CpsDataService {
             .build();
     }
 
+    private Collection<DataNode> buildDataNodeCollectionFromJson(final String dataspaceName, final String anchorName,
+        final String parentNodeXpath, final String jsonData) {
+
+        final var anchor = cpsAdminService.getAnchor(dataspaceName, anchorName);
+        final var schemaContext = getSchemaContext(dataspaceName, anchor.getSchemaSetName());
+
+        final NormalizedNode<?, ?> normalizedNode = YangUtils.parseJsonData(jsonData, schemaContext, parentNodeXpath);
+        return new DataNodeBuilder()
+            .withParentNodeXpath(parentNodeXpath)
+            .withNormalizedNodeTree(normalizedNode)
+            .buildCollection();
+    }
+
     private SchemaContext getSchemaContext(final String dataspaceName, final String schemaSetName) {
         return yangTextSchemaSourceSetCache.get(dataspaceName, schemaSetName).getSchemaContext();
     }
diff --git a/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java b/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java
index 48f9763eeb..0ed3bf0051 100644
--- a/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java
+++ b/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java
@@ -55,6 +55,18 @@ public interface CpsDataPersistenceService {
         @NonNull DataNode dataNode);
 
     /**
+     * Adds list node child elements to a Fragment.
+     *
+     * @param dataspaceName   dataspace name
+     * @param anchorName      anchor name
+     * @param parentNodeXpath parent node xpath
+     * @param dataNodes       collection of data nodes representing list node elements
+     */
+
+    void addListDataNodes(@NonNull String dataspaceName, @NonNull String anchorName, @NonNull String parentNodeXpath,
+        @NonNull Collection<DataNode> dataNodes);
+
+    /**
      * Retrieves datanode by XPath for given dataspace and anchor.
      *
      * @param dataspaceName          dataspace name
@@ -100,4 +112,5 @@ public interface CpsDataPersistenceService {
      */
     Collection<DataNode> queryDataNodes(@NonNull String dataspaceName, @NonNull String anchorName,
         @NonNull String cpsPath, @NonNull FetchDescendantsOption fetchDescendantsOption);
+
 }
diff --git a/cps-service/src/main/java/org/onap/cps/spi/exceptions/AlreadyDefinedException.java b/cps-service/src/main/java/org/onap/cps/spi/exceptions/AlreadyDefinedException.java
index 9e54f34937..1352a9b6c7 100644
--- a/cps-service/src/main/java/org/onap/cps/spi/exceptions/AlreadyDefinedException.java
+++ b/cps-service/src/main/java/org/onap/cps/spi/exceptions/AlreadyDefinedException.java
@@ -19,6 +19,8 @@
 
 package org.onap.cps.spi.exceptions;
 
+import java.util.Collection;
+
 /**
  * Already defined exception. Indicates the cps object with same name already exists.
  */
@@ -70,4 +72,10 @@ public class AlreadyDefinedException extends CpsAdminException {
         final Throwable cause) {
         return new AlreadyDefinedException("Data node", xpath, contextName, cause);
     }
+
+    public static AlreadyDefinedException forDataNodes(final Collection<String> xpaths, final String contextName,
+        final Throwable cause) {
+        final var name = String.format("(one or more) of %s", xpaths);
+        return new AlreadyDefinedException("Data node", name, contextName, cause);
+    }
 }
diff --git a/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsDataServiceImplSpec.groovy b/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsDataServiceImplSpec.groovy
index 8fbf74504b..5f930a1527 100644
--- a/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsDataServiceImplSpec.groovy
+++ b/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsDataServiceImplSpec.groovy
@@ -25,6 +25,7 @@ import org.onap.cps.api.CpsAdminService
 import org.onap.cps.api.CpsModuleService
 import org.onap.cps.spi.CpsDataPersistenceService
 import org.onap.cps.spi.FetchDescendantsOption
+import org.onap.cps.spi.exceptions.DataValidationException
 import org.onap.cps.spi.model.Anchor
 import org.onap.cps.spi.model.DataNodeBuilder
 import org.onap.cps.yang.YangTextSchemaSourceSet
@@ -51,16 +52,8 @@ class CpsDataServiceImplSpec extends Specification {
     def schemaSetName = 'some schema set'
 
     def 'Saving json data.'() {
-        given: 'that the admin service will return an anchor'
-            def anchor = Anchor.builder().name(anchorName).schemaSetName(schemaSetName).build()
-            mockCpsAdminService.getAnchor(dataspaceName, anchorName) >> anchor
-        and: 'the schema source set cache returns a schema source set'
-            def mockYangTextSchemaSourceSet = Mock(YangTextSchemaSourceSet)
-            mockYangTextSchemaSourceSetCache.get(dataspaceName, schemaSetName) >> mockYangTextSchemaSourceSet
-        and: 'the schema source sets returns the test-tree schema context'
-            def yangResourceNameToContent = TestUtils.getYangResourcesAsMap('test-tree.yang')
-            def schemaContext = YangTextSchemaSourceSetBuilder.of(yangResourceNameToContent).getSchemaContext()
-            mockYangTextSchemaSourceSet.getSchemaContext() >> schemaContext
+        given: 'schema set for given anchor and dataspace references test-tree model'
+            setupSchemaSetMocks('test-tree.yang')
         when: 'save data method is invoked with test-tree json data'
             def jsonData = TestUtils.getResourceFileContent('test-tree.json')
             objectUnderTest.saveData(dataspaceName, anchorName, jsonData)
@@ -70,24 +63,44 @@ class CpsDataServiceImplSpec extends Specification {
     }
 
     def 'Saving child data fragment under existing node.'() {
-        given: 'that the admin service will return an anchor'
-            def anchor = Anchor.builder().name(anchorName).schemaSetName(schemaSetName).build()
-            mockCpsAdminService.getAnchor(dataspaceName, anchorName) >> anchor
-        and: 'the schema source set cache returns a schema source set'
-            def mockYangTextSchemaSourceSet = Mock(YangTextSchemaSourceSet)
-            mockYangTextSchemaSourceSetCache.get(dataspaceName, schemaSetName) >> mockYangTextSchemaSourceSet
-        and: 'the schema source sets returns the test-tree schema context'
-            def yangResourceNameToContent = TestUtils.getYangResourcesAsMap('test-tree.yang')
-            def schemaContext = YangTextSchemaSourceSetBuilder.of(yangResourceNameToContent).getSchemaContext()
-            mockYangTextSchemaSourceSet.getSchemaContext() >> schemaContext
+        given: 'schema set for given anchor and dataspace references test-tree model'
+            setupSchemaSetMocks('test-tree.yang')
         when: 'save data method is invoked with test-tree json data'
             def jsonData = '{"branch": [{"name": "New"}]}'
-            objectUnderTest.saveData(dataspaceName, anchorName, '/test-tree',jsonData)
+            objectUnderTest.saveData(dataspaceName, anchorName, '/test-tree', jsonData)
         then: 'the persistence service method is invoked with correct parameters'
-            1 * mockCpsDataPersistenceService.addChildDataNode(dataspaceName, anchorName,'/test-tree',
+            1 * mockCpsDataPersistenceService.addChildDataNode(dataspaceName, anchorName, '/test-tree',
                     { dataNode -> dataNode.xpath == '/test-tree/branch[@name=\'New\']' })
     }
 
+    def 'Saving list-node data fragment under existing node.'() {
+        given: 'schema set for given anchor and dataspace references test-tree model'
+            setupSchemaSetMocks('test-tree.yang')
+        when: 'save data method is invoked with list-node json data'
+            def jsonData = '{"branch": [{"name": "A"}, {"name": "B"}]}'
+            objectUnderTest.saveListNodeData(dataspaceName, anchorName, '/test-tree', jsonData)
+        then: 'the persistence service method is invoked with correct parameters'
+            1 * mockCpsDataPersistenceService.addListDataNodes(dataspaceName, anchorName, '/test-tree',
+                    { dataNodeCollection ->
+                        {
+                            assert dataNodeCollection.size() == 2
+                            assert dataNodeCollection.collect { it.getXpath() }
+                                    .containsAll(['/test-tree/branch[@name=\'A\']', '/test-tree/branch[@name=\'B\']'])
+                        }
+                    }
+            )
+    }
+
+    def 'Saving empty list-node data fragment.'() {
+        given: 'schema set for given anchor and dataspace references test-tree model'
+            setupSchemaSetMocks('test-tree.yang')
+        when: 'save data method is invoked with empty list-node data fragment'
+            def jsonData = '{"branch": []}'
+            objectUnderTest.saveListNodeData(dataspaceName, anchorName, '/test-tree', jsonData)
+        then: 'invalid data exception is thrown'
+            thrown(DataValidationException)
+    }
+
     def 'Get data node with option #fetchDescendantsOption.'() {
         def xpath = '/xpath'
         def dataNode = new DataNodeBuilder().withXpath(xpath).build()
@@ -100,45 +113,39 @@ class CpsDataServiceImplSpec extends Specification {
     }
 
     def 'Update data node leaves: #scenario.'() {
-        given: 'that the admin service will return an anchor'
-            def anchor = Anchor.builder().name(anchorName).schemaSetName(schemaSetName).build()
-            mockCpsAdminService.getAnchor(dataspaceName, anchorName) >> anchor
-        and: 'the schema source set cache returns a schema source set'
-            def mockYangTextSchemaSourceSet = Mock(YangTextSchemaSourceSet)
-            mockYangTextSchemaSourceSetCache.get(dataspaceName, schemaSetName) >> mockYangTextSchemaSourceSet
-        and: 'the schema source sets returns the test-tree schema context'
-            def yangResourceNameToContent = TestUtils.getYangResourcesAsMap('test-tree.yang')
-            def schemaContext = YangTextSchemaSourceSetBuilder.of(yangResourceNameToContent).getSchemaContext()
-            mockYangTextSchemaSourceSet.getSchemaContext() >> schemaContext
+        given: 'schema set for given anchor and dataspace references test-tree model'
+            setupSchemaSetMocks('test-tree.yang')
         when: 'update data method is invoked with json data #jsonData and parent node xpath #parentNodeXpath'
             objectUnderTest.updateNodeLeaves(dataspaceName, anchorName, parentNodeXpath, jsonData)
         then: 'the persistence service method is invoked with correct parameters'
-            1 * mockCpsDataPersistenceService.updateDataLeaves(dataspaceName, anchorName, nodeXpath, leaves)
+            1 * mockCpsDataPersistenceService.updateDataLeaves(dataspaceName, anchorName, expectedNodeXpath, leaves)
         where: 'following parameters were used'
-            scenario         | parentNodeXpath | jsonData                         | nodeXpath                           | leaves
-            'top level node' | '/'             | '{ "test-tree": {"branch": []}}' | '/test-tree'                        | Collections.emptyMap()
-            'level 2 node'   | '/test-tree'    | '{"branch": [{"name":"Name"}]}'  | '/test-tree/branch[@name=\'Name\']' | ['name': 'Name']
+            scenario         | parentNodeXpath | jsonData                        || expectedNodeXpath                   | leaves
+            'top level node' | '/'             | '{"test-tree": {"branch": []}}' || '/test-tree'                        | Collections.emptyMap()
+            'level 2 node'   | '/test-tree'    | '{"branch": [{"name":"Name"}]}' || '/test-tree/branch[@name=\'Name\']' | ['name': 'Name']
     }
 
     def 'Replace data node: #scenario.'() {
-        given: 'that the admin service will return an anchor'
-            def anchor = Anchor.builder().name(anchorName).schemaSetName(schemaSetName).build()
-            mockCpsAdminService.getAnchor(dataspaceName, anchorName) >> anchor
-        and: 'the schema source set cache returns a schema source set'
-            def mockYangTextSchemaSourceSet = Mock(YangTextSchemaSourceSet)
-            mockYangTextSchemaSourceSetCache.get(dataspaceName, schemaSetName) >> mockYangTextSchemaSourceSet
-        and: 'the schema source sets returns the test-tree schema context'
-            def yangResourceNameToContent = TestUtils.getYangResourcesAsMap('test-tree.yang')
-            def schemaContext = YangTextSchemaSourceSetBuilder.of(yangResourceNameToContent).getSchemaContext()
-            mockYangTextSchemaSourceSet.getSchemaContext() >> schemaContext
+        given: 'schema set for given anchor and dataspace references test-tree model'
+            setupSchemaSetMocks('test-tree.yang')
         when: 'replace data method is invoked with json data #jsonData and parent node xpath #parentNodeXpath'
             objectUnderTest.replaceNodeTree(dataspaceName, anchorName, parentNodeXpath, jsonData)
         then: 'the persistence service method is invoked with correct parameters'
             1 * mockCpsDataPersistenceService.replaceDataNodeTree(dataspaceName, anchorName,
-                    { dataNode -> dataNode.xpath == nodeXpath })
+                    { dataNode -> dataNode.xpath == expectedNodeXpath })
         where: 'following parameters were used'
-            scenario         | parentNodeXpath | jsonData                         | nodeXpath
-            'top level node' | '/'             | '{ "test-tree": {"branch": []}}' | '/test-tree'
-            'level 2 node'   | '/test-tree'    | '{"branch": [{"name":"Name"}]}'  | '/test-tree/branch[@name=\'Name\']'
+            scenario         | parentNodeXpath | jsonData                        || expectedNodeXpath
+            'top level node' | '/'             | '{"test-tree": {"branch": []}}' || '/test-tree'
+            'level 2 node'   | '/test-tree'    | '{"branch": [{"name":"Name"}]}' || '/test-tree/branch[@name=\'Name\']'
+    }
+
+    def setupSchemaSetMocks(String... yangResources) {
+        def anchor = Anchor.builder().name(anchorName).schemaSetName(schemaSetName).build()
+        mockCpsAdminService.getAnchor(dataspaceName, anchorName) >> anchor
+        def mockYangTextSchemaSourceSet = Mock(YangTextSchemaSourceSet)
+        mockYangTextSchemaSourceSetCache.get(dataspaceName, schemaSetName) >> mockYangTextSchemaSourceSet
+        def yangResourceNameToContent = TestUtils.getYangResourcesAsMap(yangResources)
+        def schemaContext = YangTextSchemaSourceSetBuilder.of(yangResourceNameToContent).getSchemaContext()
+        mockYangTextSchemaSourceSet.getSchemaContext() >> schemaContext
     }
 }
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