this.forwardKeyValuesSorted = new boolean[forwardKeys.length];
this.lastValues = new String[forwardKeys.length];
for(i=0;i<forwardKeys.length;i++)
{
forwardWriters[i] = new MultiFSOMapWriter(
_index.getPath() + "/" + _index.getPrefix() + "."+structureName+"-"+i+FSOrderedMapFile.USUAL_EXTENSION,
REVERSE_KEY_LOOKUP_WRITING_BUFFER_SIZE,
keyFactories[i] = new FixedSizeTextFactory(valueLensChars[forwardKeys[i]]),
new FixedSizeIntWritableFactory()
);