norms(String field, byte[] bytes, int offset)

[Karl Wettin]

I'm confused by this method. Why is the length set to maxDoc() and  
not bytes.length? This means that the following snippet will throw an  
ArrayIndexOutOfBoundsException in most cases:

byte[] b = new byte[1];
ir.norms(field, b, doc);

  /** Read norms into a pre-allocated array. */
  public synchronized void norms(String field, byte[] bytes, int  
offset)
    throws IOException {

    ensureOpen();
    Norm norm = (Norm) norms.get(field);
    if (norm == null) {
      System.arraycopy(fakeNorms(), 0, bytes, offset, maxDoc());
      return;
    }

    if (norm.bytes != null) {                     // can copy from  
cache
      System.arraycopy(norm.bytes, 0, bytes, offset, maxDoc());
      return;
    }

    // Read from disk.  norm.in may be shared across  multiple  
norms and
    // should only be used in a synchronized context.
    norm.in.seek(norm.normSeek);
    norm.in.readBytes(bytes, offset, maxDoc());
  }

--
karl

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