[INLONG-11135][Agent] Support filtering capability when supplementing…

… data

inlong-agent/agent-common/src/main/java/org/apache/inlong/agent/constant/TaskConstants.java

@@ -69,7 +69,7 @@ public class TaskConstants extends CommonConstants {
     public static final String PREDEFINE_FIELDS = "task.predefinedFields";
     public static final String FILE_SOURCE_EXTEND_CLASS = "task.fileTask.extendedClass";
     public static final String DEFAULT_FILE_SOURCE_EXTEND_CLASS =
-            "org.apache.inlong.agent.plugin.sources.file.extend.ExtendedHandler";
+            "org.apache.inlong.agent.plugin.sources.file.extend.DefaultExtendedHandler";
     public static final String TASK_AUDIT_VERSION = "task.auditVersion";
 
     // Kafka task

inlong-agent/agent-plugins/src/main/java/org/apache/inlong/agent/plugin/sources/file/extend/DefaultExtendedHandler.java

@@ -0,0 +1,42 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.inlong.agent.plugin.sources.file.extend;
+
+import org.apache.inlong.agent.conf.InstanceProfile;
+import org.apache.inlong.agent.plugin.Message;
+
+import java.util.Map;
+
+public class DefaultExtendedHandler extends ExtendedHandler {
+
+    public DefaultExtendedHandler(InstanceProfile profile) {
+        super(profile);
+    }
+
+    // Modify the header by the body
+    public void dealWithHeader(Map<String, String> header, byte[] body) {
+    }
+
+    public boolean filterMessage(Message msg) {
+        return true;
+    }
+
+    public static class Constants {
+
+    }
+}