Github user chandnisingh commented on a diff in the pull request:
https://github.com/apache/incubator-apex-malhar/pull/242#discussion_r60151911
--- Diff:
library/src/main/java/org/apache/apex/malhar/lib/utils/IOUtils.java ---
@@ -0,0 +1,56 @@
+/**
+ * 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.apex.malhar.lib.utils;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+public class IOUtils
+{
+ /**
+ * Utility method to copy partial data from input stream to output
stream.
+ * @param inputStream input stream
+ * @param inputStreamOffset offset in the input stream till which the
data is copied.
+ * @param outputStream output stream
+ * @throws IOException
+ */
+ public static void copyPartial(InputStream inputStream, long
inputStreamOffset, OutputStream outputStream)
--- End diff --
IOUtils.copyLarge will copy all the data from input to output stream.
Needed to copy data till a particular offset from the input to output. This
is common in AbstractFileOutput operator which can use this util function.
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