Rest & Java API layer - Query Datanodes using cpsPath that contains contains a leaf name and a leaf value

Issue-ID: CPS-231

Signed-off-by: niamhcore <niamh.core@est.tech>
Change-Id: I3bf2a9946746ad06ddb4bc832206a36b78ff2175

3 files changed, 99 insertions, 0 deletions

diff --git a/cps-service/src/main/java/org/onap/cps/api/CpsQueryService.java b/cps-service/src/main/java/org/onap/cps/api/CpsQueryService.java
index a66e084364..b432af8009 100644
--- a/cps-service/src/main/java/org/onap/cps/api/CpsQueryService.java
+++ b/cps-service/src/main/java/org/onap/cps/api/CpsQueryService.java
@@ -19,9 +19,24 @@
 
 package org.onap.cps.api;
 
+import java.util.Collection;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.onap.cps.spi.model.DataNode;
+
 /*
  * Query interface for handling cps queries.
  */
 public interface CpsQueryService {
 
+    /**
+     * Get data nodes for the given dataspace and anchor by cps path.
+     *
+     * @param dataspaceName          dataspace name
+     * @param anchorName             anchor name
+     * @param cpsPath                cps path
+     * @return a collection of data nodes
+     */
+    Collection<DataNode> queryDataNodes(@NonNull String dataspaceName, @NonNull String anchorName,
+        @NonNull String cpsPath);
+
 }
diff --git a/cps-service/src/main/java/org/onap/cps/api/impl/CpsQueryServiceImpl.java b/cps-service/src/main/java/org/onap/cps/api/impl/CpsQueryServiceImpl.java
new file mode 100644
index 0000000000..63d0a0fbb9
--- /dev/null
+++ b/cps-service/src/main/java/org/onap/cps/api/impl/CpsQueryServiceImpl.java
@@ -0,0 +1,40 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (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.api.impl;
+
+import java.util.Collection;
+import org.onap.cps.api.CpsQueryService;
+import org.onap.cps.spi.CpsDataPersistenceService;
+import org.onap.cps.spi.model.DataNode;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class CpsQueryServiceImpl implements CpsQueryService {
+
+    @Autowired
+    private CpsDataPersistenceService cpsDataPersistenceService;
+
+    @Override
+    public Collection<DataNode> queryDataNodes(final String dataspaceName, final String anchorName,
+        final String cpsPath) {
+        return cpsDataPersistenceService.queryDataNodes(dataspaceName, anchorName, cpsPath);
+    }
+}
\ No newline at end of file
diff --git a/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsQueryServiceImplSpec.groovy b/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsQueryServiceImplSpec.groovy
new file mode 100644
index 0000000000..6e044b0444
--- /dev/null
+++ b/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsQueryServiceImplSpec.groovy
@@ -0,0 +1,44 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (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.api.impl
+
+import org.onap.cps.spi.CpsDataPersistenceService
+import spock.lang.Specification
+
+class CpsQueryServiceImplSpec extends Specification {
+    def mockCpsDataPersistenceService = Mock(CpsDataPersistenceService)
+
+    def objectUnderTest = new CpsQueryServiceImpl()
+
+    def setup() {
+        objectUnderTest.cpsDataPersistenceService = mockCpsDataPersistenceService
+    }
+
+    def 'Query data nodes by cps path.'() {
+        given: 'a dataspace name, an anchor name and a cps path'
+            def dataspaceName = 'some dataspace'
+            def anchorName = 'some anchor'
+            def cpsPath = '/cps-path'
+        when: 'queryDataNodes is invoked'
+            objectUnderTest.queryDataNodes(dataspaceName, anchorName, cpsPath)
+        then: 'the persistence service is called once with the correct parameters'
+            1 * mockCpsDataPersistenceService.queryDataNodes(dataspaceName, anchorName, cpsPath)
+    }
+}
\ No newline at end of file