How to pass parameter

Question

Hello,
I've to similar methods that I want to combine them. The are small differences in the methods. Other parts are exactly same.
Here are the samples:
long findWaitMaxEla(CCursor pUnKnownCursor, CWaitKey pWaitKey)
    while (iter.hasNext())
      mapEntry       = (Map.Entry) iter.next();
      iUnKnownCursor = (CCursor)   mapEntry.getValue();
      if ((iWait = (CWait) iUnKnownCursor.waitMap.get(pWaitKey))==null) continue;
long findWaitMaxEla(CCursor pUnKnownCursor, CHistogramKey pHistogramKey)
    while (iter.hasNext())
      mapEntry       = (Map.Entry) iter.next();
      iUnKnownCursor = (CCursor)   mapEntry.getValue();
      if ((iHistogramValue = (CHistogramValue) iUnKnownCursor.histogram.waitMap.get(pHistogramKey))==null) continue;
}The differences:
- Second parameters: pWaitKey, pHistogramKey
- Map names: iUnKnownCursor.waitMap, iUnKnownCursor.histogram.waitMap (Please note that iUnKnownCursor is got in the method. I can not pass them as a parameter).
- Returned class names from the maps: CWait, CHistogramValue
How can I combine these 2 methods into one method ?
Thanks in advance...

Answer 1

Assuming that iWait and iHistogramValue are fields rather than variables, and are not used elsewhere in the methods, then something like this would work:private interface Lambda {
  Object apply (XXX self, CCursor iUnKnownCursor, Object key) ;
private static Lambda iHistogramValueLambda = new Lambda(){
  public Object apply (XXX self, CCursor iUnKnownCursor, Object key) {
   return self.iHistogramValue  = (CHistogramValue)iUnKnownCursor.histogram.waitMap.get(key);
private static Lambda iWaitLambda = new Lambda(){
  public Object apply (XXX self, CCursor iUnKnownCursor, Object key) {
    return self.iWait = (CWait) iUnKnownCursor.waitMap.get(key)
long findWaitMaxEla(CCursor pUnKnownCursor, Object pKey, Lambda lambda) {
     while (iter.hasNext())
       mapEntry       = (Map.Entry) iter.next();
       iUnKnownCursor = (CCursor)   mapEntry.getValue();
       if (lambda.apply(this, iUnKnownCursor, pkey)==null) continue;
long findWaitMaxEla(CCursor pUnKnownCursor, CWaitKey pWaitKey)
  return findWaitMaxEla(pUnKnownCursor, pWaitKey, iWaitLambda);
long findWaitMaxEla(CCursor pUnKnownCursor, CHistogramKey pHistogramKey) {
  return findWaitMaxEla(pUnKnownCursor, pHistogramKey, iHistogramValueLambda);
}Pete