Fix serialization of Pageable.unpaged

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/support/PageableSpringEncoder.java

@@ -37,6 +37,21 @@ public class PageableSpringEncoder implements Encoder {
 
 	private final Encoder delegate;
 
+	/**
+	 * Page index parameter name.
+	 */
+	private String pageParameter = "page";
+
+	/**
+	 * Page size parameter name.
+	 */
+	private String sizeParameter = "size";
+
+	/**
+	 * Sort parameter name.
+	 */
+	private String sortParameter = "sort";
+
 	/**
 	 * Creates a new PageableSpringEncoder with the given delegate for fallback. If no
 	 * delegate is provided and this encoder cant handle the request, an EncodeException
@@ -54,8 +69,12 @@ public class PageableSpringEncoder implements Encoder {
 		if (supports(object)) {
 			if (object instanceof Pageable) {
 				Pageable pageable = (Pageable) object;
-				template.query("page", pageable.getPageNumber() + "");
+
-				template.query("size", pageable.getPageSize() + "");
+				if (pageable.isPaged()) {
+					template.query(pageParameter, pageable.getPageNumber() + "");
+					template.query(sizeParameter, pageable.getPageSize() + "");
+				}
+
 				if (pageable.getSort() != null) {
 					applySort(template, pageable.getSort());
 				}
@@ -82,11 +101,17 @@ public class PageableSpringEncoder implements Encoder {
 		Collection<String> existingSorts = template.queries().get("sort");
 		List<String> sortQueries = existingSorts != null ? new ArrayList<>(existingSorts)
 				: new ArrayList<>();
+		if (!sortParameter.equals("sort")) {
+			existingSorts = template.queries().get(sortParameter);
+			if (existingSorts != null) {
+				sortQueries.addAll(existingSorts);
+			}
+		}
 		for (Sort.Order order : sort) {
 			sortQueries.add(order.getProperty() + "," + order.getDirection());
 		}
 		if (!sortQueries.isEmpty()) {
-			template.query("sort", sortQueries);
+			template.query(sortParameter, sortQueries);
 		}
 	}
 

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/support/PageableEncoderTests.java

@@ -63,13 +63,18 @@ public class PageableEncoderTests {
 		encoder.encode(createPageAndSortRequest(), null, request);
 
 		// Request queries shall contain three entries
-		assertThat(request.queries().size()).isEqualTo(3);
+		assertThat(request.queries()).hasSize(3);
 		// Request page shall contain page
 		assertThat(request.queries().get("page")).contains(String.valueOf(PAGE));
 		// Request size shall contain size
-		assertThat(request.queries().get("size")).contains(String.valueOf(SIZE));
+		assertThat(request.queries().get("size")).contains(String.valueOf(SIZE)); // Request
-		// Request sort size shall contain sort entries
+																					// sort
-		assertThat(request.queries().get("sort").size()).isEqualTo(2);
+																					// size
+																					// shall
+																					// contain
+																					// sort
+																					// entries
+		assertThat(request.queries().get("sort")).hasSize(2);
 	}
 
 	private Pageable createPageAndSortRequest() {
@@ -86,9 +91,14 @@ public class PageableEncoderTests {
 		// Request page shall contain page
 		assertThat(request.queries().get("page")).contains(String.valueOf(PAGE));
 		// Request size shall contain size
-		assertThat(request.queries().get("size")).contains(String.valueOf(SIZE));
+		assertThat(request.queries().get("size")).contains(String.valueOf(SIZE)); // Request
-		// Request sort size shall contain sort entries
+																					// sort
-		assertThat(request.queries().containsKey("sort")).isEqualTo(false);
+																					// size
+																					// shall
+																					// contain
+																					// sort
+																					// entries
+		assertThat(request.queries()).doesNotContainKey("sort");
 	}
 
 	private Pageable createPageAndRequest() {
@@ -105,11 +115,22 @@ public class PageableEncoderTests {
 		// Request queries shall contain three entries
 		assertThat(request.queries().size()).isEqualTo(1);
 		// Request sort size shall contain sort entries
-		assertThat(request.queries().get("sort").size()).isEqualTo(2);
+		assertThat(request.queries().get("sort")).hasSize(2);
 	}
 
 	private Sort createSort() {
 		return Sort.by(SORT_1, SORT_2).ascending();
 	}
 
+	@Test
+	public void testUnpagedRequest() {
+		Encoder encoder = this.context.getInstance("foo", Encoder.class);
+		assertThat(encoder).isNotNull();
+		RequestTemplate request = new RequestTemplate();
+
+		encoder.encode(Pageable.unpaged(), null, request);
+		// Request queries shall contain three entries
+		assertThat(request.queries()).isEmpty();
+	}
+
 }