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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 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.
An InputStream that wraps a DataInput.

public class DataInputInputStream extends InputStream {
  private DataInput in;

Construct an InputStream from the given DataInput. If 'in' is already an InputStream, simply returns it. Otherwise, wraps it in an InputStream.

in the DataInput to wrap
an InputStream instance that reads from 'in'
  public static InputStream constructInputStream(DataInput in) {
    if (in instanceof InputStream) {
      return (InputStream)in;
    } else {
      return new DataInputInputStream(in);
  public DataInputInputStream(DataInput in) {
    this. = in;
  public int read() throws IOException {
    return .readUnsignedByte();
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