fix(java): Fix usage of cursor pagination causing endpoint return typ…

…e to be void (#5708)

* fix(java): Fix usage of cursor pagination causing endpoint return type to be void

* Add test case

* Run seed against new test case

* Allow objects with nonempty path to be used for cursor pagination

* run seed

* Add a utility to find the property type of the desired property within the request body

* Add new test case just for deep cursor path

* run new fixture

* run the fixture

* Refactor next page number offset pagination for easier overriding

* Fix fixture

* Add more test cases

* Add test case as expected failure

* test udpate

* Handle different zero value possibilities for next snippet

* Fix nits

* Change test definition

* Delete pagination gens

* delete long snapshots

* Delete all complex

* Rerun pagination tests

---------

Co-authored-by: Alberto <[email protected]>
Co-authored-by: fern-support <115122769+fern-api[bot]@users.noreply.github.com>

generators/java/sdk/src/main/java/com/fern/java/client/generators/endpoint/EnrichedCursorPathGetter.java

@@ -0,0 +1,32 @@
+package com.fern.java.client.generators.endpoint;
+
+import com.squareup.javapoet.CodeBlock;
+import com.squareup.javapoet.TypeName;
+import java.util.Optional;
+import org.immutables.value.Value;
+
+// TODO(ajgateno): This will be necessary until the required IR changes include more information about the path
+@Value.Immutable
+public interface EnrichedCursorPathGetter {
+
+    EnrichedCursorPathItem pathItem();
+
+    CodeBlock getter();
+
+    TypeName typeName();
+
+    Optional<EnrichedCursorPathGetter> previous();
+
+    @Value.Default
+    default boolean optional() {
+        return false;
+    }
+
+    default String propertyName() {
+        return pathItem().name().getCamelCase().getSafeName();
+    }
+
+    static ImmutableEnrichedCursorPathGetter.Builder builder() {
+        return ImmutableEnrichedCursorPathGetter.builder();
+    }
+}

generators/java/sdk/src/main/java/com/fern/java/client/generators/endpoint/EnrichedCursorPathItem.java

@@ -0,0 +1,34 @@
+package com.fern.java.client.generators.endpoint;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import com.fern.ir.model.commons.Name;
+import org.immutables.value.Value;
+
+// TODO(ajgateno): This will be necessary until the required IR changes include more information about the path
+@Value.Immutable
+@JsonSerialize(as = ImmutableEnrichedCursorPathItem.class)
+@JsonDeserialize(as = ImmutableEnrichedCursorPathItem.class)
+public interface EnrichedCursorPathItem {
+
+    @JsonProperty("name")
+    Name name();
+
+    @Value.Default
+    @JsonProperty("optional")
+    default boolean optional() {
+        return false;
+    }
+
+    // TODO(ajgateno): Check for wrapped aliases and add a .value to getter if necessary
+    @Value.Default
+    @JsonProperty("alias")
+    default boolean alias() {
+        return false;
+    }
+
+    static ImmutableEnrichedCursorPathItem.Builder builder() {
+        return ImmutableEnrichedCursorPathItem.builder();
+    }
+}

generators/java/sdk/src/main/java/com/fern/java/client/generators/endpoint/EnrichedCursorPathSetter.java

@@ -0,0 +1,17 @@
+package com.fern.java.client.generators.endpoint;
+
+import com.squareup.javapoet.CodeBlock;
+import org.immutables.value.Value;
+
+// TODO(ajgateno): This will be necessary until the required IR changes include more information about the path
+@Value.Immutable
+public interface EnrichedCursorPathSetter {
+
+    EnrichedCursorPathGetter getter();
+
+    CodeBlock setter();
+
+    static ImmutableEnrichedCursorPathSetter.Builder builder() {
+        return ImmutableEnrichedCursorPathSetter.builder();
+    }
+}

generators/java/sdk/src/main/java/com/fern/java/client/generators/endpoint/OnlyRequestEndpointWriter.java

@@ -194,6 +194,9 @@ public CodeBlock getInitializeRequestCodeBlock(
                     @Override
                     public Void visitTypeReference(HttpRequestBodyReference typeReference) {
                         builder.add(".addHeader($S, $S)\n", AbstractEndpointWriter.CONTENT_TYPE_HEADER, contentType);
+                        AbstractEndpointWriter.responseContentType(httpEndpoint.getResponse())
+                                .ifPresent(responseContentType -> builder.add(
+                                        ".addHeader($S, $S)\n", AbstractEndpointWriter.ACCEPT_HEADER, contentType));
                         return null;
                     }