import com.sun.org.apache.xpath.internal.objects.DTMXRTreeFrag; //导入依赖的package包/类
/**
  * Cleans DTMXRTreeFrag objects by removing references
  * to DTM and XPathContext objects.
  */
 private final void releaseDTMXRTreeFrags(){
   if(m_DTMXRTreeFrags == null){
     return;
   }
   final Iterator iter = (m_DTMXRTreeFrags.values()).iterator();
   while(iter.hasNext()){
     DTMXRTreeFrag frag = (DTMXRTreeFrag)iter.next();
     frag.destruct();
     iter.remove();
   }
   m_DTMXRTreeFrags = null;
}
 

import com.sun.org.apache.xpath.internal.objects.DTMXRTreeFrag; //导入依赖的package包/类
/**
 * Gets DTMXRTreeFrag object if one has already been created.
 * Creates new DTMXRTreeFrag object and adds to m_DTMXRTreeFrags  HashMap,
 * otherwise.
 * @param dtmIdentity
 * @return DTMXRTreeFrag
 */
public DTMXRTreeFrag getDTMXRTreeFrag(int dtmIdentity){
  if(m_DTMXRTreeFrags == null){
    m_DTMXRTreeFrags = new HashMap();
  }

  if(m_DTMXRTreeFrags.containsKey(new Integer(dtmIdentity))){
     return (DTMXRTreeFrag)m_DTMXRTreeFrags.get(new Integer(dtmIdentity));
  }else{
    final DTMXRTreeFrag frag = new DTMXRTreeFrag(dtmIdentity,this);
    m_DTMXRTreeFrags.put(new Integer(dtmIdentity),frag);
    return frag ;
  }
}