import com.sun.org.apache.xml.internal.utils.StringBufferPool; //导入依赖的package包/类
/**
 * Determine if the string-value of a node is whitespace
 *
 * @param nodeHandle The node Handle.
 *
 * @return Return true if the given node is whitespace.
 */
public boolean isWhitespace(int nodeHandle)
{
      int type = getNodeType(nodeHandle);
  Node node = getNode(nodeHandle);
      if(TEXT_NODE == type || CDATA_SECTION_NODE == type)
  {
    // If this is a DTM text node, it may be made of multiple DOM text
    // nodes -- including navigating into Entity References. DOM2DTM
    // records the first node in the sequence and requires that we
    // pick up the others when we retrieve the DTM node's value.
    //
    // %REVIEW% DOM Level 3 is expected to add a "whole text"
    // retrieval method which performs this function for us.
    FastStringBuffer buf = StringBufferPool.get();
    while(node!=null)
    {
      buf.append(node.getNodeValue());
      node=logicalNextDOMTextNode(node);
    }
   boolean b = buf.isWhitespace(0, buf.length());
    StringBufferPool.free(buf);
   return b;
  }
  return false;
}
 

import com.sun.org.apache.xml.internal.utils.StringBufferPool; //导入依赖的package包/类
/**
 * Given a node handle, return its node value. This is mostly
 * as defined by the DOM, but may ignore some conveniences.
 * <p>
 *
 * @param nodeHandle The node id.
 * @return String Value of this node, or null if not
 * meaningful for this node type.
 */
public String getNodeValue(int nodeHandle)
{
  // The _type(nodeHandle) call was taking the lion's share of our
  // time, and was wrong anyway since it wasn't coverting handle to
  // identity. Inlined it.
  int type = _exptype(makeNodeIdentity(nodeHandle));
  type=(NULL != type) ? getNodeType(nodeHandle) : NULL;

  if(TEXT_NODE!=type && CDATA_SECTION_NODE!=type)
    return getNode(nodeHandle).getNodeValue();

  // If this is a DTM text node, it may be made of multiple DOM text
  // nodes -- including navigating into Entity References. DOM2DTM
  // records the first node in the sequence and requires that we
  // pick up the others when we retrieve the DTM node's value.
  //
  // %REVIEW% DOM Level 3 is expected to add a "whole text"
  // retrieval method which performs this function for us.
  Node node = getNode(nodeHandle);
  Node n=logicalNextDOMTextNode(node);
  if(n==null)
    return node.getNodeValue();

  FastStringBuffer buf = StringBufferPool.get();
      buf.append(node.getNodeValue());
  while(n!=null)
  {
    buf.append(n.getNodeValue());
    n=logicalNextDOMTextNode(n);
  }
  String s = (buf.length() > 0) ? buf.toString() : "";
  StringBufferPool.free(buf);
  return s;
}