ParameterizedTypeReference now passed in

An argument must be added other wise we cannot return anything other
than a linkedhashmap because of type erasure.

https://stackoverflow.com/questions/21987295/using-spring-resttemplate-in-generic-method-with-generic-parameter

Issue-ID: SO-820
Change-Id: I96b5bf9db8389beacfcd79e7a80ee22b3d470a27
Signed-off-by: Benjamin, Max (mb388a) <mb388a@us.att.com>

4 files changed, 63 insertions, 11 deletions

diff --git a/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/client/sdnc/BaseClient.java b/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/client/sdnc/BaseClient.java
index 5a63d2097b..50137cf985 100644
--- a/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/client/sdnc/BaseClient.java
+++ b/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/client/sdnc/BaseClient.java
@@ -52,20 +52,19 @@ public class BaseClient<I,O> {
 		this.targetUrl = targetUrl;
 	}
 
-	public O get(I data, Object... uriVariables) throws RestClientException {
-		return run(data, HttpMethod.GET, uriVariables);
+	public O get(I data, ParameterizedTypeReference<O> typeRef, Object... uriVariables) throws RestClientException {
+		return run(data, HttpMethod.GET, typeRef, uriVariables);
 	}
 
-	public O post(I data, Object... uriVariables) throws RestClientException {
-		return run(data, HttpMethod.POST, uriVariables);
+	public O post(I data, ParameterizedTypeReference<O> typeRef, Object... uriVariables) throws RestClientException {
+		return run(data, HttpMethod.POST, typeRef, uriVariables);
 	}
 
-	public O run(I data, HttpMethod method, Object... uriVariables) throws RestClientException {
+	public O run(I data, HttpMethod method, ParameterizedTypeReference<O> typeRef, Object... uriVariables) throws RestClientException {
 		HttpEntity<I> requestEntity = new HttpEntity<I>(data, getHttpHeader());
 		RestTemplate restTemplate = new RestTemplate();
 		restTemplate.setRequestFactory(new BufferingClientHttpRequestFactory(new SimpleClientHttpRequestFactory()));
-		ParameterizedTypeReference<O> output = new ParameterizedTypeReference<O>() {};
-		ResponseEntity<O> responseEntity = restTemplate.exchange(getTargetUrl(), method, requestEntity, output,
+		ResponseEntity<O> responseEntity = restTemplate.exchange(getTargetUrl(), method, requestEntity, typeRef,
 				uriVariables);
 		return responseEntity.getBody();
 	}
diff --git a/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/client/sdnc/SDNCClient.java b/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/client/sdnc/SDNCClient.java
index 1f0d654a85..9e60196426 100644
--- a/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/client/sdnc/SDNCClient.java
+++ b/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/client/sdnc/SDNCClient.java
@@ -21,6 +21,7 @@
 package org.onap.so.client.sdnc;
 
 import java.util.LinkedHashMap;
+
 import javax.ws.rs.core.UriBuilder;
 
 import org.onap.so.client.exception.BadResponseException;
@@ -29,6 +30,7 @@ import org.onap.so.client.sdnc.beans.SDNCProperties;
 import org.onap.so.client.sdnc.endpoint.SDNCTopology;
 import org.onap.so.logger.MsoLogger;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.ParameterizedTypeReference;
 import org.springframework.http.HttpHeaders;
 import org.springframework.stereotype.Component;
 
@@ -58,7 +60,7 @@ public class SDNCClient {
 			HttpHeaders httpHeader = sdnCommonTasks.getHttpHeaders(properties.getAuth());
 			STOClient.setHttpHeader(httpHeader);
 			msoLogger.info("Running SDNC CLIENT for TargetUrl: " + targetUrl);
-			LinkedHashMap<?, ?> output = STOClient.post(jsonRequest);
+			LinkedHashMap<?, ?> output = STOClient.post(jsonRequest, new ParameterizedTypeReference<LinkedHashMap<? ,?>>() {});
 			msoLogger.info("Validating output...");
 			return sdnCommonTasks.validateSDNResponse(output);
 	}
@@ -84,7 +86,7 @@ public class SDNCClient {
 			HttpHeaders httpHeader = sdnCommonTasks.getHttpHeaders(properties.getAuth());
 			STOClient.setHttpHeader(httpHeader);
 			msoLogger.info("Running SDNC CLIENT...");
-			LinkedHashMap<?, ?> output = STOClient.get(jsonRequest);
+			LinkedHashMap<?, ?> output = STOClient.get(jsonRequest, new ParameterizedTypeReference<LinkedHashMap<? ,?>>() {});
 			msoLogger.info("Validating output...");
 			return sdnCommonTasks.validateSDNGetResponse(output);
 	}
diff --git a/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/client/sniro/SniroClient.java b/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/client/sniro/SniroClient.java
index 979b9e5e80..cee94e28bd 100644
--- a/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/client/sniro/SniroClient.java
+++ b/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/client/sniro/SniroClient.java
@@ -31,6 +31,7 @@ import org.onap.so.client.sniro.beans.SniroConductorRequest;
 import org.onap.so.client.sniro.beans.SniroManagerRequest;
 import org.onap.so.logger.MsoLogger;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.ParameterizedTypeReference;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.MediaType;
 import org.springframework.stereotype.Component;
@@ -76,7 +77,7 @@ public class SniroClient {
 		baseClient.setTargetUrl(url);
 		baseClient.setHttpHeader(header);
 
-		LinkedHashMap<?, ?> response = baseClient.post(homingRequest.toJsonString());
+		LinkedHashMap<?, ?> response = baseClient.post(homingRequest.toJsonString(), new ParameterizedTypeReference<LinkedHashMap<? ,?>>() {});
 		validator.validateDemandsResponse(response);
 		log.trace("Completed Sniro Client Post Demands");
 	}
@@ -106,7 +107,7 @@ public class SniroClient {
 		baseClient.setTargetUrl(url);
 		baseClient.setHttpHeader(header);
 
-		LinkedHashMap<?, ?> response = baseClient.post(releaseRequest.toJsonString());
+		LinkedHashMap<?, ?> response = baseClient.post(releaseRequest.toJsonString(), new ParameterizedTypeReference<LinkedHashMap<? ,?>>() {});
 		SniroValidator v = new SniroValidator();
 		v.validateReleaseResponse(response);
 		log.trace("Completed Sniro Client Post Release");
diff --git a/bpmn/so-bpmn-tasks/src/test/java/org/onap/so/client/sdnc/BaseClientTest.java b/bpmn/so-bpmn-tasks/src/test/java/org/onap/so/client/sdnc/BaseClientTest.java
new file mode 100644
index 0000000000..a564d8a21d
--- /dev/null
+++ b/bpmn/so-bpmn-tasks/src/test/java/org/onap/so/client/sdnc/BaseClientTest.java
@@ -0,0 +1,50 @@
+package org.onap.so.client.sdnc;
+
+import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
+import static com.github.tomakehurst.wiremock.client.WireMock.get;
+import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
+import static com.github.tomakehurst.wiremock.core.WireMockConfiguration.options;
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.junit.Assert.assertThat;
+
+import java.util.Map;
+
+import javax.ws.rs.core.UriBuilder;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.springframework.core.ParameterizedTypeReference;
+
+import com.github.tomakehurst.wiremock.junit.WireMockRule;
+
+import wiremock.org.apache.http.entity.ContentType;
+public class BaseClientTest {
+
+	
+	@Rule
+	public WireMockRule wm = new WireMockRule(options().dynamicPort());
+	
+	@Test
+	public void verifyString() {
+		BaseClient<String, String> client = new BaseClient<>();
+		String response = "{\"hello\" : \"world\"}";
+		client.setTargetUrl(UriBuilder.fromUri("http://localhost/test").port(wm.port()).build().toString());
+		wm.stubFor(get(urlEqualTo("/test"))
+                .willReturn(aResponse().withStatus(200).withBody(response).withHeader("Content-Type", ContentType.APPLICATION_JSON.toString())));
+		
+		String result = client.get("", new ParameterizedTypeReference<String>() {});
+		assertThat(result, equalTo(response));
+	}
+	
+	@Test
+	public void verifyMap() {
+		BaseClient<String, Map<String, Object>> client = new BaseClient<>();
+		String response = "{\"hello\" : \"world\"}";
+		client.setTargetUrl(UriBuilder.fromUri("http://localhost/test").port(wm.port()).build().toString());
+		wm.stubFor(get(urlEqualTo("/test"))
+                .willReturn(aResponse().withStatus(200).withBody(response).withHeader("Content-Type", ContentType.APPLICATION_JSON.toString())));
+		
+		Map<String, Object> result = client.get("", new ParameterizedTypeReference<Map<String, Object>>() {});
+		assertThat("world", equalTo(result.get("hello")));
+	}
+}