/*
 * 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.flink.connector.file.src.util;

import org.apache.flink.annotation.PublicEvolving;
import org.apache.flink.util.ExceptionUtils;
import org.apache.flink.util.IOUtils;
import org.apache.flink.util.function.SupplierWithException;
import org.apache.flink.util.function.ThrowingRunnable;

import java.io.Closeable;
import java.io.IOException;

/**
 * Miscellaneous utilities for the file source.
 */
@PublicEvolving
public final class Utils {

	/**
	 * Runs the given {@code SupplierWithException} (a piece of code producing a result).
	 * If an exception happens during that, the given closable is quietly closed.
	 */
	public static <E> E doWithCleanupOnException(
			final Closeable toCleanUp,
			final SupplierWithException<E, IOException> code) throws IOException {

		try {
			return code.get();
		}
		catch (Throwable t) {
			IOUtils.closeQuietly(toCleanUp);
			ExceptionUtils.rethrowIOException(t);
			return null; // silence the compiler
		}
	}

	/**
	 * Runs the given {@code Runnable}. If an exception happens during that, the given closable
	 * is quietly closed.
	 */
	public static void doWithCleanupOnException(
			final Closeable toCleanUp,
			final ThrowingRunnable<IOException> code) throws IOException {

		doWithCleanupOnException(toCleanUp, (SupplierWithException<Void, IOException>) () -> {
			code.run();
			return null;
		});
	}

	// ------------------------------------------------------------------------

	/** This class is not meant to be instantiated. */
	private Utils() {}
}

@@ -902,16 +902,78 @@
 olving;%0A
+import org.apache.flink.connector.file.src.reader.BulkFormat;%0A
 import o
@@ -1218,16 +1218,52 @@
 ception;
+%0Aimport java.util.function.Consumer;
 %0A%0A/**%0A *
@@ -2266,16 +2266,620 @@
 %7D);%0A%09%7D%0A%0A
+%09/**%0A%09 * Performs the given action for each remaining element in %7B@link BulkFormat.Reader%7D until all%0A%09 * elements have been processed or the action throws an exception.%0A%09 */%0A%09public static %3CT%3E void forEachRemaining(%0A%09%09%09final BulkFormat.Reader%3CT%3E reader,%0A%09%09%09final Consumer%3C? super T%3E action) throws IOException %7B%0A%09%09BulkFormat.RecordIterator%3CT%3E batch;%0A%09%09RecordAndPosition%3CT%3E record;%0A%0A%09%09try %7B%0A%09%09%09while ((batch = reader.readBatch()) != null) %7B%0A%09%09%09%09while ((record = batch.next()) != null) %7B%0A%09%09%09%09%09action.accept(record.getRecord());%0A%09%09%09%09%7D%0A%09%09%09%09batch.releaseBatch();%0A%09%09%09%7D%0A%09%09%7D finally %7B%0A%09%09%09reader.close();%0A%09%09%7D%0A%09%7D%0A%0A
 %09// ----

Introduce forEachRemaining util for BulkFormat.Reader