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Guava IO contains a variety of types and utilities to ease IO handling in Java.

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/*
 * Copyright (C) 2009 Google Inc.
 *
 * Licensed 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 com.google.common.io;

import com.google.common.annotations.Beta;

import java.io.DataInput;
import java.io.IOException;

/**
 * An extension of {@code DataInput} for reading from in-memory byte arrays; its
 * methods offer identical functionality but do not throw {@link IOException}.
 * If any method encounters the end of the array prematurely, it throws {@link
 * IllegalStateException}.
 *
 * @author Kevin Bourrillion
 * @since 1
 */
@Beta
public interface ByteArrayDataInput extends DataInput {
  /*@Override*/ void readFully(byte b[]);
  /*@Override*/ void readFully(byte b[], int off, int len);
  /*@Override*/ int skipBytes(int n);
  /*@Override*/ boolean readBoolean();
  /*@Override*/ byte readByte();
  /*@Override*/ int readUnsignedByte();
  /*@Override*/ short readShort();
  /*@Override*/ int readUnsignedShort();
  /*@Override*/ char readChar();
  /*@Override*/ int readInt();
  /*@Override*/ long readLong();
  /*@Override*/ float readFloat();
  /*@Override*/ double readDouble();
  /*@Override*/ String readLine();
  /*@Override*/ String readUTF();
}