com.sun.org.apache.xml.internal.dtm.ref: public class: DTMChildIterNodeList

com.sun.org.apache.xml.internal.dtm.ref
public class: DTMChildIterNodeList [javadoc | source]

java.lang.Object
   com.sun.org.apache.xml.internal.dtm.ref.DTMNodeListBase
      com.sun.org.apache.xml.internal.dtm.ref.DTMChildIterNodeList

All Implemented Interfaces:
NodeList

DTMNodeList gives us an implementation of the DOM's NodeList interface wrapped around a DTM Iterator. The author considers this something of an abominations, since NodeList was not intended to be a general purpose "list of nodes" API and is generally considered by the DOM WG to have be a mistake... but I'm told that some of the XPath/XSLT folks say they must have this solution. Please note that this is not necessarily equivlaent to a DOM NodeList operating over the same document. In particular:

If there are several Text nodes in logical succession (ie, across CDATASection and EntityReference boundaries), we will return only the first; the caller is responsible for stepping through them. (%REVIEW% Provide a convenience routine here to assist, pending proposed DOM Level 3 getAdjacentText() operation?)
Since the whole XPath/XSLT architecture assumes that the source document is not altered while we're working with it, we do not promise to implement the DOM NodeList's "live view" response to document mutation.

State: In progress!!

Constructor:

Constructor:
public DTMChildIterNodeList(DTM parentDTM, int parentHandle) { m_parentDTM=parentDTM; m_firstChild=parentDTM.getFirstChild(parentHandle); } Public constructor: Create a NodeList to support DTMNodeProxy.getChildren(). Unfortunately AxisIterators and DTMIterators don't share an API, so I can't use the existing Axis.CHILD iterator. Rather than create Yet Another Class, let's set up a special case of this one. Parameters: `parentDTM` - The DTM containing this node `parentHandle` - DTM node-handle integer

 public DTMChildIterNodeList(DTM parentDTM,
    int parentHandle) {
        m_parentDTM=parentDTM;
        m_firstChild=parentDTM.getFirstChild(parentHandle);
}

Public constructor: Create a NodeList to support DTMNodeProxy.getChildren(). Unfortunately AxisIterators and DTMIterators don't share an API, so I can't use the existing Axis.CHILD iterator. Rather than create Yet Another Class, let's set up a special case of this one.

Parameters:

parentDTM - The DTM containing this node

parentHandle - DTM node-handle integer

Method from com.sun.org.apache.xml.internal.dtm.ref.DTMChildIterNodeList Summary:
getLength, item

Methods from com.sun.org.apache.xml.internal.dtm.ref.DTMNodeListBase:
getLength, item

Methods from java.lang.Object:
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from com.sun.org.apache.xml.internal.dtm.ref.DTMChildIterNodeList Detail:
public int getLength() { int count=0; for (int handle=m_firstChild; handle!=DTM.NULL; handle=m_parentDTM.getNextSibling(handle)) { ++count; } return count; } The number of nodes in the list. The range of valid child node indices is 0 to `length-1` inclusive.
public Node item(int index) { int handle=m_firstChild; while(--index >=0 && handle!=DTM.NULL) { handle=m_parentDTM.getNextSibling(handle); } if (handle == DTM.NULL) { return null; } return m_parentDTM.getNode(handle); } Returns the `index`th item in the collection. If `index` is greater than or equal to the number of nodes in the list, this returns `null`.

Method from com.sun.org.apache.xml.internal.dtm.ref.DTMChildIterNodeList Detail:

 public int getLength() {
        int count=0;
        for (int handle=m_firstChild;
             handle!=DTM.NULL;
             handle=m_parentDTM.getNextSibling(handle)) {
            ++count;
        }
        return count;
}

length-1

 public Node item(int index) {
        int handle=m_firstChild;
        while(--index >=0 && handle!=DTM.NULL) {
            handle=m_parentDTM.getNextSibling(handle);
        }
        if (handle == DTM.NULL) {
            return null;
        }
        return m_parentDTM.getNode(handle);
}

index

null