src/share/classes/sun/misc/IOUtils.java

rev 12546 : 8181432: Better processing of unresolved permissions
Reviewed-by: mullan

*** 1,7 ****
  /*
!  * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 2009, 2017, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
*** 35,47 ****
  import java.util.Arrays;
  
  public class IOUtils {
  
      /**
!      * Read up to <code>length</code> of bytes from <code>in</code>
       * until EOF is detected.
!      * @param in input stream, must not be null
       * @param length number of bytes to read, -1 or Integer.MAX_VALUE means
       *        read as much as possible
       * @param readAll if true, an EOFException will be thrown if not enough
       *        bytes are read. Ignored when length is -1 or Integer.MAX_VALUE
       * @return bytes read
--- 35,47 ----
  import java.util.Arrays;
  
  public class IOUtils {
  
      /**
!      * Read up to {@code length} of bytes from {@code in}
       * until EOF is detected.
!      * @param is input stream, must not be null
       * @param length number of bytes to read, -1 or Integer.MAX_VALUE means
       *        read as much as possible
       * @param readAll if true, an EOFException will be thrown if not enough
       *        bytes are read. Ignored when length is -1 or Integer.MAX_VALUE
       * @return bytes read
*** 75,80 ****
--- 75,98 ----
              }
              pos += cc;
          }
          return output;
      }
+ 
+     /**
+      * Read {@code length} of bytes from {@code in}. An exception is
+      * thrown if there are not enough bytes in the stream.
+      *
+      * @param is input stream, must not be null
+      * @param length number of bytes to read, must not be negative
+      * @return bytes read
+      * @throws IOException if any IO error or a premature EOF is detected, or
+      *      if {@code length} is negative since this length is usually also
+      *      read from {@code is}.
+      */
+     public static byte[] readNBytes(InputStream is, int length) throws IOException {
+         if (length < 0) {
+             throw new IOException("length cannot be negative: " + length);
+         }
+         return readFully(is, length, true);
+     }
  }