1710 Rebase - Second Attempt

This commit rebases changes from openecomp-mso/internal-staging-1710 up to and including this codecloud commit:
54483fc6606ddb1591a2e9da61bff8712325f924
Wed Sep 6 18:12:56 2017 -0400

Rebasing was done on a branch on top of this commit in so/master in ONAP:
93fbdfbe46104f8859d4754040f979cb7997c157
Thu Sep 7 16:42:59 2017 +0000

Change-Id: I4ad9abf40da32bf5bdca43e868b8fa2dbcd9dc59
Issue-id: SO-107
Signed-off-by: Arthur Martella <amartell@research.att.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/bpmn/MSOCommonBPMN/src/main/java/org/openecomp/mso/jsonpath/JsonPathUtil.java b/bpmn/MSOCommonBPMN/src/main/java/org/openecomp/mso/jsonpath/JsonPathUtil.java
new file mode 100644
index 0000000000..56ce2dfa19
--- /dev/null
+++ b/bpmn/MSOCommonBPMN/src/main/java/org/openecomp/mso/jsonpath/JsonPathUtil.java
@@ -0,0 +1,39 @@
+package org.openecomp.mso.jsonpath;
+
+import java.util.Optional;
+
+import com.jayway.jsonpath.Configuration;
+import com.jayway.jsonpath.JsonPath;
+import com.jayway.jsonpath.Option;
+
+import net.minidev.json.JSONArray;
+
+public class JsonPathUtil {
+
+	
+	private final Configuration conf;
+	
+	private JsonPathUtil() {
+		conf = Configuration.defaultConfiguration().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).<JSONArray>read(jsonPath).isEmpty();
+	}
+	
+	public <T> Optional<T> locateResult(String json, String jsonPath) {
+		final JSONArray result = JsonPath.using(conf).parse(json).read(jsonPath);
+		if (result.isEmpty()) {
+			return Optional.empty();
+		} else {
+			return Optional.of((T)result.get(0));
+		}
+	}
+}