1 files changed, 82 insertions, 0 deletions
diff --git a/common/src/main/java/org/openecomp/mso/jsonpath/JsonPathUtil.java b/common/src/main/java/org/openecomp/mso/jsonpath/JsonPathUtil.java
new file mode 100644
index 0000000000..148eb74068
--- /dev/null
+++ b/common/src/main/java/org/openecomp/mso/jsonpath/JsonPathUtil.java
@@ -0,0 +1,82 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.mso.jsonpath;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.jayway.jsonpath.Configuration;
+import com.jayway.jsonpath.JsonPath;
+import com.jayway.jsonpath.Option;
+import com.jayway.jsonpath.spi.json.JacksonJsonNodeJsonProvider;
+
+public class JsonPathUtil {
+
+	
+	private final Configuration conf;
+	
+	private JsonPathUtil() {
+		conf = Configuration.defaultConfiguration().jsonProvider(new JacksonJsonNodeJsonProvider()).addOptions(Option.ALWAYS_RETURN_LIST, Option.SUPPRESS_EXCEPTIONS);
+	}
+	
+	private static class Helper {
+		private static final JsonPathUtil INSTANCE = new JsonPathUtil();
+	}
+	
+	public static JsonPathUtil getInstance() {
+		return Helper.INSTANCE;
+	}
+	public boolean pathExists(String json, String jsonPath) {
+		return JsonPath.using(conf).parse(json).<ArrayNode>read(jsonPath).size() != 0;
+	}
+	
+	public Optional<String> locateResult(String json, String jsonPath) {
+		final ArrayNode result = JsonPath.using(conf).parse(json).read(jsonPath);
+		if (result.size() == 0) {
+			return Optional.empty();
+		} else {
+			if (result.get(0).isValueNode()) {
+				return Optional.of(result.get(0).asText());
+			} else {
+				return Optional.of(result.get(0).toString());
+			}
+			
+		}
+	}
+	
+	public List<String> locateResultList(String json, String jsonPath) {
+		final ArrayNode resultNodes = JsonPath.using(conf).parse(json).read(jsonPath);
+		final ArrayList<String> result = new ArrayList<>();
+		
+		for (JsonNode node : resultNodes) {
+			if (node.isValueNode()) {
+				result.add(node.asText());
+			} else {
+				result.add(node.toString());
+			}
+			
+		}
+		return result;
+	}
+}