1 files changed, 113 insertions, 0 deletions
diff --git a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-core/src/main/java/org/openecomp/core/converter/impl/pnfd/PnfdQueryExecutor.java b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-core/src/main/java/org/openecomp/core/converter/impl/pnfd/PnfdQueryExecutor.java
new file mode 100644
index 0000000000..890dedb2a7
--- /dev/null
+++ b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-core/src/main/java/org/openecomp/core/converter/impl/pnfd/PnfdQueryExecutor.java
@@ -0,0 +1,113 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 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.openecomp.core.converter.impl.pnfd;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+import org.apache.commons.collections.MapUtils;
+import org.openecomp.core.converter.pnfd.exception.QueryOperationNotSupportedException;
+import org.openecomp.core.converter.pnfd.model.ConversionQuery;
+
+/**
+ * Runs YAML queries
+ */
+public class PnfdQueryExecutor {
+
+    private PnfdQueryExecutor() {
+
+    }
+
+    /**
+     * Finds if a YAML object contains the provided YAML query.
+     * @param conversionQuery   The query
+     * @param yamlObject        The YAML object to be searched
+     * @return
+     * {@code true} if the YAML query structure was found in the YAML object, {@code false} otherwise.
+     */
+    public static boolean find(final ConversionQuery conversionQuery, final Object yamlObject) {
+        return find(conversionQuery.getQuery(), yamlObject);
+    }
+
+    /**
+     * Recursive structure combined with {@link #findMap(Map, Map)} to find if a YAML object contains the provided YAML query.
+     * Compares the objects if it's a scalar value, otherwise go further in the YAML hierarchical structure
+     * calling the {@link #findMap(Map, Map)}.
+     * @param query        The current query
+     * @param yamlObject   The current YAML object to be searched
+     * @return
+     * {@code true} if the YAML query structure was found in the YAML object, {@code false} otherwise.
+     */
+    private static boolean find(final Object query, final Object yamlObject) {
+        if (query == null) {
+            return true;
+        }
+
+        checkSupportedQueryType(query);
+
+        if (query instanceof String) {
+            return query.equals(yamlObject);
+        }
+        if (query instanceof Map) {
+            return findMap((Map) query, (Map) yamlObject);
+        }
+        return false;
+    }
+
+    /**
+     * Recursive structure combined with {@link #find(Object, Object)} to find if a YAML object contains the provided YAML query.     *
+     * @param query        The query current object
+     * @param yamlObject   The YAML object to be searched
+     * @return
+     * {@code true} if the YAML query structure was found in the YAML object, {@code false} otherwise.
+     */
+    private static boolean findMap(final Map query, final Map yamlObject) {
+        if (MapUtils.isEmpty(query) || MapUtils.isEmpty(yamlObject)) {
+            return false;
+        }
+
+        if (!yamlObject.keySet().containsAll(query.keySet())) {
+            return false;
+        }
+
+        return query.entrySet().parallelStream().allMatch(queryEntryObj -> {
+            final Entry queryEntry = (Entry) queryEntryObj;
+            return find(queryEntry.getValue(), yamlObject.get(queryEntry.getKey()));
+        });
+    }
+
+    /**
+     * Checks the supported types for a query.
+     * @param query    the query to check
+     */
+    private static void checkSupportedQueryType(final Object query) {
+        if (query instanceof String || query instanceof Map) {
+            return;
+        }
+        if (query instanceof List || query instanceof Set) {
+            throw new QueryOperationNotSupportedException("Yaml list query is not supported yet");
+        }
+        throw new QueryOperationNotSupportedException(
+            String.format("Yaml query operation for '%s' is not supported yet", query.getClass())
+        );
+    }
+
+}