Update ErrorResponse serialization.

CHANGELOG.md

@@ -5,6 +5,9 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ## v5.0.1 - TBD
 Updated Jackson to 2.20.1.
 
+Updated `ErrorResponse.java` to print attributes in an order that is more consistent with the
+example JSON objects presented in RFC 7644. Now, `status` is the last attribute printed.
+
 ## v5.0.0 - 2025-Dec-15
 For consistency with other open source Ping Identity software, the UnboundID SCIM 2 SDK for Java is
 now available under the terms of the Apache License (version 2.0). For legacy compatibility, the

scim2-sdk-common/src/main/java/com/unboundid/scim2/common/messages/ErrorResponse.java

@@ -34,6 +34,7 @@
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.unboundid.scim2.common.annotations.NotNull;
@@ -85,6 +86,7 @@
  */
 @Schema(id="urn:ietf:params:scim:api:messages:2.0:Error",
     name="Error Response", description = "SCIM 2.0 Error Response")
+@JsonPropertyOrder({"schemas", "scimType", "detail", "status"})
 public class ErrorResponse extends BaseScimResource
 {
   @Nullable

scim2-sdk-common/src/test/java/com/unboundid/scim2/common/ErrorResponseTest.java

@@ -39,6 +39,7 @@
 import com.unboundid.scim2.common.utils.SchemaUtils;
 import org.testng.annotations.Test;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.testng.Assert.assertEquals;
 
 /**
@@ -122,4 +123,37 @@ public void testDeserializationAndSerializationWithNumberStatus()
             readValue(serializedString);
     assertEquals(errorResponse, deserializedErrorResponse);
   }
+
+  /**
+   * Ensures that serialized ErrorResponse objects match the form presented in
+   * RFC 7644.
+   */
+  @Test
+  public void testSerialization() throws Exception
+  {
+    // Use a JSON string from the RFC with all fields populated.
+    String json = """
+        {
+          "schemas": ["urn:ietf:params:scim:api:messages:2.0:Error"],
+          "scimType": "invalidSyntax",
+          "detail": "Request is unparsable, syntactically incorrect, or violates schema.",
+          "status": "400"
+        }""";
+    String expectedJSON = JsonUtils.getObjectReader().readTree(json)
+        .toPrettyString();
+
+    // Construct the same data in object form. When the object is printed as a
+    // string, it should match the expected output.
+    ErrorResponse errorResponse = new ErrorResponse(400);
+    errorResponse.setScimType("invalidSyntax");
+    errorResponse.setDetail(
+        "Request is unparsable, syntactically incorrect, or violates schema.");
+    assertThat(errorResponse.toString()).isEqualTo(expectedJSON);
+
+    // The string formatting should also match when the error originates from
+    // an exception object.
+    BadRequestException e = BadRequestException.invalidSyntax(
+        "Request is unparsable, syntactically incorrect, or violates schema.");
+    assertThat(e.getScimError().toString()).isEqualTo(expectedJSON);
+  }
 }