fillPath() and fillRect() functions in GraphicsContextJava.cpp use Image::drawPattern() for applying patterns as fill attribute. But drawPattern() doesn't use patternTransform argument and thus, the final image won't be transformed.

Sample HTML content:
<svg>
    <pattern id="pattern" x="0" y="0" width="25" height="25"
             patternUnits="userSpaceOnUse" patternTransform="rotate(45)">
        <rect x="0" y="0" width="20" height="20"/>
    </pattern>

    <rect x="10" y="10" width="100" height="100" fill="url(#pattern)" />
</svg>