[OLINGO-1315]OData v4.0:Client: API to return HTTP Request details

fit/src/test/java/org/apache/olingo/fit/tecsvc/client/BasicITCase.java

@@ -84,6 +84,7 @@ import org.apache.olingo.client.api.uri.FilterFactory;
 import org.apache.olingo.client.api.uri.URIBuilder;
 import org.apache.olingo.client.api.uri.URIFilter;
 import org.apache.olingo.client.core.ODataClientFactory;
+import org.apache.olingo.client.core.communication.request.AbstractODataBasicRequest;
 import org.apache.olingo.client.core.uri.URIUtils;
 import org.apache.olingo.commons.api.edm.Edm;
 import org.apache.olingo.commons.api.edm.EdmActionImport;
@@ -538,7 +539,8 @@ public class BasicITCase extends AbstractParamTecSvcITCase {
         newEntity);
     assertNotNull(createRequest);
     final ODataEntityCreateResponse<ClientEntity> createResponse = createRequest.execute();
-
+    assertNotNull(createRequest.getHttpRequest());
+    assertNotNull(((AbstractODataBasicRequest)createRequest).getPayload());
     assertEquals(HttpStatusCode.CREATED.getStatusCode(), createResponse.getStatusCode());
     assertEquals(SERVICE_URI + ES_ALL_PRIM + "(1)", createResponse.getHeader(HttpHeader.LOCATION).iterator().next());
     final ClientEntity createdEntity = createResponse.getBody();

lib/client-core/src/main/java/org/apache/olingo/client/core/communication/request/AbstractODataBasicRequest.java

@@ -81,7 +81,7 @@ public abstract class AbstractODataBasicRequest<T extends ODataResponse>
    *
    * @return InputStream for entire payload.
    */
-  protected abstract InputStream getPayload();
+  public abstract InputStream getPayload();
 
   /**
    * Serializes the full request into the given batch request.

lib/client-core/src/main/java/org/apache/olingo/client/core/communication/request/cud/ODataDeleteRequestImpl.java

@@ -50,7 +50,7 @@ public class ODataDeleteRequestImpl extends AbstractODataBasicRequest<ODataDelet
    * No payload: null will be returned.
    */
   @Override
-  protected InputStream getPayload() {
+  public InputStream getPayload() {
     return null;
   }
 

lib/client-core/src/main/java/org/apache/olingo/client/core/communication/request/cud/ODataEntityCreateRequestImpl.java

@@ -71,7 +71,7 @@ public class ODataEntityCreateRequestImpl<E extends ClientEntity>
   }
 
   @Override
-  protected InputStream getPayload() {
+  public InputStream getPayload() {
     try {
       return odataClient.getWriter().writeEntity(entity, ContentType.parse(getContentType()));
     } catch (final ODataSerializerException e) {

lib/client-core/src/main/java/org/apache/olingo/client/core/communication/request/cud/ODataEntityUpdateRequestImpl.java

@@ -75,7 +75,7 @@ public class ODataEntityUpdateRequestImpl<E extends ClientEntity>
   }
 
   @Override
-  protected InputStream getPayload() {
+  public InputStream getPayload() {
     try {
       return odataClient.getWriter().writeEntity(changes, ContentType.parse(getContentType()));
     } catch (final ODataSerializerException e) {

lib/client-core/src/main/java/org/apache/olingo/client/core/communication/request/cud/ODataPropertyUpdateRequestImpl.java

@@ -84,7 +84,7 @@ public class ODataPropertyUpdateRequestImpl extends AbstractODataBasicRequest<OD
   }
 
   @Override
-  protected InputStream getPayload() {
+  public InputStream getPayload() {
     try {
       return odataClient.getWriter().writeProperty(property, ContentType.parse(getContentType()));
     } catch (final ODataSerializerException e) {

lib/client-core/src/main/java/org/apache/olingo/client/core/communication/request/cud/ODataReferenceAddingRequestImpl.java

@@ -62,7 +62,7 @@ public class ODataReferenceAddingRequestImpl extends AbstractODataBasicRequest<O
    * No payload: null will be returned.
    */
   @Override
-  protected InputStream getPayload() {
+  public InputStream getPayload() {
     if (reference == null) {
       return null;
     } else {

lib/client-core/src/main/java/org/apache/olingo/client/core/communication/request/cud/ODataValueUpdateRequestImpl.java

@@ -85,7 +85,7 @@ public class ODataValueUpdateRequestImpl extends AbstractODataBasicRequest<OData
    * {@inheritDoc }
    */
   @Override
-  protected InputStream getPayload() {
+  public InputStream getPayload() {
     return IOUtils.toInputStream(value.toString());
   }
 

lib/client-core/src/main/java/org/apache/olingo/client/core/communication/request/invoke/AbstractODataInvokeRequest.java

@@ -112,7 +112,7 @@ public abstract class AbstractODataInvokeRequest<T extends ClientInvokeResult>
   protected abstract ContentType getPOSTParameterFormat();
 
   @Override
-  protected InputStream getPayload() {
+  public InputStream getPayload() {
     if (!this.parameters.isEmpty() && this.method == HttpMethod.POST) {
       // Additional, non-binding parameters MUST be sent as JSON
       final ClientEntity tmp = odataClient.getObjectFactory().newEntity(null);

lib/client-core/src/main/java/org/apache/olingo/client/core/communication/request/retrieve/AbstractODataRetrieveRequest.java

@@ -54,7 +54,7 @@ public abstract class AbstractODataRetrieveRequest<T>
    * This kind of request doesn't have any payload: null will be returned.
    */
   @Override
-  protected InputStream getPayload() {
+  public InputStream getPayload() {
     return null;
   }
 

lib/client-core/src/main/java/org/apache/olingo/client/core/communication/response/AbstractODataResponse.java

@@ -256,7 +256,7 @@ public abstract class AbstractODataResponse implements ODataResponse {
       throw new NoContentException();
     }
 
-    if (payload == null && batchInfo.isValidBatch()) {
+    if (payload == null && batchInfo != null && batchInfo.isValidBatch()) {
       // get input stream till the end of item
       payload = new PipedInputStream();