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  1. JDK
  2. JDK-4448699

writeBits does not throw IllegalArgumentException

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    • Subcomponent:
    • Resolved In Build:
      beta2
    • CPU:
      generic
    • OS:
      generic
    • Verification:
      Not verified

      Description



      Name: vpR10011 Date: 04/20/2001



      Specification of the class javax.imageio.stream.ImageOutputStreamImpl says:

      "public void writeBits(long bits, int numBits) throws IOException
      ...
      Parameters:
              bits - a long containing the bits to be written, starting with the bit in
              position numBits - 1 down to the least signficant bit.
                                                        ^^ typo copied from the spec.
              numBits - an int between 0 and 64, inclusive.
      Throws:
              IllegalArgumentException - if numBits is not between 0 and 64,
              inclusive.
              IOException - if an I/O error occurs."


      But writeBits does not throw any exception if numBits is not between 0 and 64.


      To reproduce this bug run the following test:
      ---------------------test.java--------------
      import java.io.*;
      import javax.imageio.stream.*;

      public class test {

          public static void main(String[] argv) {
              OutputStream os = (OutputStream) new ByteArrayOutputStream();
              ImageOutputStreamImpl iosI = (ImageOutputStreamImpl) new MemoryCacheImageOutputStream(os);
              System.out.println("numbits < 0");
              try {
                  iosI.writeBits(1L, -1);
                  System.out.println("Failed: IllegalArgumentException was expected");
              } catch (IllegalArgumentException e) {
                  System.out.println("Passed");
              } catch (Exception e) {
                  System.out.println("Failed: unexpected exception " + e);
              }
              System.out.println("numbits > 64");
              try {
                  iosI.writeBits(1L, 100);
                  System.out.println("Failed: IllegalArgumentException was expected");
              } catch (IllegalArgumentException e) {
                  System.out.println("Passed");
              } catch (Exception e) {
                  System.out.println("Failed: unexpected exception " + e);
              }
          }
      }
      -------------------------log----------------
      % java -version
      java version "1.4.0-beta"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b60)
      Java HotSpot(TM) Client VM (build 1.4.0-beta-b60, mixed mode)
      % java test
      numbits < 0
      Failed: IllegalArgumentException was expected
      numbits > 64
      Failed: IllegalArgumentException was expected



      This bug causes failure of the new JCK test
      api/javax_imageio/stream/ImageOutputStreamImpl/index.html#write


      ======================================================================

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            Assignee:
            dricesunw Daniel Rice (Inactive)
            Reporter:
            verapsunw Verap Verap (Inactive)
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