Add OperationIdDiff class

Author: issy

core/src/main/java/org/openapitools/openapidiff/core/compare/OpenApiDiff.java

@@ -40,6 +40,7 @@ public class OpenApiDiff {
   private OAuthFlowDiff oAuthFlowDiff;
   private ExtensionsDiff extensionsDiff;
   private MetadataDiff metadataDiff;
+  private OperationIdDiff operationIdDiff;
   private final OpenAPI oldSpecOpenApi;
   private final OpenAPI newSpecOpenApi;
   private final OpenApiDiffOptions options;
@@ -93,6 +94,7 @@ private void initializeFields() {
     this.oAuthFlowDiff = new OAuthFlowDiff(this);
     this.extensionsDiff = new ExtensionsDiff(this);
     this.metadataDiff = new MetadataDiff(this);
+    this.operationIdDiff = new OperationIdDiff(this);
     this.deferredSchemaCache = new DeferredSchemaCache(this);
   }
 
@@ -270,6 +272,10 @@ public MetadataDiff getMetadataDiff() {
     return this.metadataDiff;
   }
 
+  public OperationIdDiff getOperationIdDiff() {
+    return this.operationIdDiff;
+  }
+
   public OpenAPI getOldSpecOpenApi() {
     return this.oldSpecOpenApi;
   }

core/src/main/java/org/openapitools/openapidiff/core/compare/OperationDiff.java

@@ -53,7 +53,7 @@ public DeferredChanged<ChangedOperation> diff(
     builder
         .with(
             openApiDiff
-                .getMetadataDiff()
+                .getOperationIdDiff()
                 .diff(oldOperation.getOperationId(), newOperation.getOperationId(), context))
         .ifPresent(changedOperation::setOperationId);
     changedOperation.setDeprecated(

core/src/main/java/org/openapitools/openapidiff/core/compare/OperationIdDiff.java

@@ -0,0 +1,19 @@
+package org.openapitools.openapidiff.core.compare;
+
+import static org.openapitools.openapidiff.core.utils.ChangedUtils.isChanged;
+
+import java.util.Optional;
+import org.openapitools.openapidiff.core.model.DiffContext;
+import org.openapitools.openapidiff.core.model.schema.ChangedOperationId;
+
+public class OperationIdDiff {
+  private final OpenApiDiff openApiDiff;
+
+  public OperationIdDiff(OpenApiDiff openApiDiff) {
+    this.openApiDiff = openApiDiff;
+  }
+
+  public Optional<ChangedOperationId> diff(String left, String right, DiffContext context) {
+    return isChanged(new ChangedOperationId(left, right, context));
+  }
+}