chore: fixing issue #390 by adding copy builders to TaskArtifactUpdateEvent and TaskStatusUpdateEvent. (#391)

Fixes #390 🦕

Signed-off-by: Emmanuel Hugonnet <[email protected]>

Author: ehsavoie

spec/src/main/java/io/a2a/spec/TaskArtifactUpdateEvent.java

@@ -94,6 +94,18 @@ public static class Builder {
         private Boolean lastChunk;
         private Map<String, Object> metadata;
 
+        public Builder() {
+        }
+
+        public Builder(TaskArtifactUpdateEvent existingTaskArtifactUpdateEvent) {
+            this.taskId = existingTaskArtifactUpdateEvent.taskId;
+            this.artifact = existingTaskArtifactUpdateEvent.artifact;
+            this.contextId = existingTaskArtifactUpdateEvent.contextId;
+            this.append = existingTaskArtifactUpdateEvent.append;
+            this.lastChunk = existingTaskArtifactUpdateEvent.lastChunk;
+            this.metadata = existingTaskArtifactUpdateEvent.metadata;
+        }
+
         public Builder taskId(String taskId) {
             this.taskId = taskId;
             return this;

spec/src/main/java/io/a2a/spec/TaskStatusUpdateEvent.java

@@ -86,6 +86,16 @@ public static class Builder {
         private boolean isFinal;
         private Map<String, Object> metadata;
 
+        public Builder() {
+        }
+
+        public Builder(TaskStatusUpdateEvent existingTaskStatusUpdateEvent) {
+            this.taskId = existingTaskStatusUpdateEvent.taskId;
+            this.status = existingTaskStatusUpdateEvent.status;
+            this.contextId = existingTaskStatusUpdateEvent.contextId;
+            this.isFinal = existingTaskStatusUpdateEvent.isFinal;
+            this.metadata = existingTaskStatusUpdateEvent.metadata;
+        }
         public Builder taskId(String id) {
             this.taskId = id;
             return this;