bbende commented on a change in pull request #3679: NIFI-6089 Add Parquet record reader and writer URL: https://github.com/apache/nifi/pull/3679#discussion_r319207274
########## File path: nifi-nar-bundles/nifi-parquet-bundle/nifi-parquet-processors/src/main/java/org/apache/nifi/parquet/stream/NifiSeekableInputStream.java ########## @@ -0,0 +1,72 @@ +/* + * 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.nifi.parquet.stream; + +import org.apache.nifi.stream.io.ByteCountingInputStream; +import org.apache.nifi.stream.io.StreamUtils; +import org.apache.parquet.io.DelegatingSeekableInputStream; + +import java.io.IOException; + +public class NifiSeekableInputStream extends DelegatingSeekableInputStream { + + private final ByteCountingInputStream input; + + public NifiSeekableInputStream(final ByteCountingInputStream input) { + super(input); + this.input = input; + this.input.mark(Integer.MAX_VALUE); + } + + @Override + public long getPos() throws IOException { + return input.getBytesConsumed(); + } + + @Override + public void seek(long newPos) throws IOException { + final long currentPos = getPos(); + if (newPos == currentPos) { + return; + } + + if (newPos > currentPos) { + // seeking forward so skip ahead the difference from current pos to new pos + StreamUtils.skip(input, newPos - getPos()); + } else { + // seeking backwards so first reset back to beginning of the stream then seek + input.reset(); + input.mark(Integer.MAX_VALUE); + StreamUtils.skip(input, newPos - getPos()); Review comment: Will update ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
