[jboss-jira] [JBoss JIRA] (AS7-4126) double values cannot be read from dmr response

[Rob Cernich (JIRA)]

Rob Cernich created AS7-4126:
--------------------------------

             Summary: double values cannot be read from dmr response
                 Key: AS7-4126
                 URL: https://issues.jboss.org/browse/AS7-4126
             Project: Application Server 7
          Issue Type: Bug
          Components: Console
    Affects Versions: 7.1.0.Final
            Reporter: Rob Cernich
            Assignee: Heiko Braun


This appears to be a bug in the GWT compiler.  The compiler turns the following:

{code:java|title=DataInput.readDouble()}
return IEEE754.toDouble(bytes[pos++], bytes[pos++], bytes[pos++], bytes[pos++], bytes[pos++], bytes[pos++], bytes[pos++], bytes[pos++]);
{code}
into: (effectively; the GWT compiler is adding a set of parentheses around the parameters passed to the native function)
{code:java|title=DataInput.readDouble() compiled}
return IEEE754.toDouble(new byte[] {bytes[pos++], bytes[pos++], bytes[pos++], bytes[pos++], bytes[pos++], bytes[pos++], bytes[pos++], bytes[pos++]});
{code}

This results in all double values in the model being interpreted as NaN.

I've patched the code I'm using in SwitchYard as follows:
{code:java|title=DataInput.java}
public double readDouble() throws IOException {
    byte doubleBytes[] = new byte[8];
    readFully(doubleBytes);
    return IEEE754.toDouble(doubleBytes);
}
{code}

{code:java|title=IEEE754.java}
public static native double toDouble(byte[] bytes) /*-{
    var ebits = 11;
    var fbits = 52;

    // Bytes to bits
    var bits = [];
    //snip...
}
{code}



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