TextAttributeConverter uses reflection to access non-portable instanceMap field.

TextAttributeConverter uses reflection to access non-portable instanceMap field which is not present on all VM's. Apache Harmony, specifically, does not have this field, leading to;

java.lang.InternalError: Missing TextAttribute.instanceMap
at com.thoughtworks.xstream.converters.extended.TextAttributeConverter.<clinit>(TextAttributeConverter.java:30)
at com.thoughtworks.xstream.XStream.setupConverters(XStream.java:583)
at com.thoughtworks.xstream.XStream.<init>(XStream.java:370)
at com.thoughtworks.xstream.XStream.<init>(XStream.java:316)

The source as shown at http://svn.codehaus.org/xstream/trunk/xstream/src/java/com/thoughtworks/xstream/converters/extended/TextAttributeConverter.java

contains this;

instanceMap = TextAttribute.class.getDeclaredField("instanceMap");

Can this class be changed to work on all VM's, not just Sun's RI?