org.argeo.cms/src/org/argeo/cms/acr/xml/ElementIterator.java

   1 package org.argeo.cms.acr.xml;
   2
   3 import java.util.Iterator;
   4 import java.util.NoSuchElementException;
   5
   6 import org.argeo.api.acr.Content;
   7 import org.argeo.api.acr.CrName;
   8 import org.argeo.api.acr.spi.ProvidedSession;
   9 import org.w3c.dom.Element;
  10 import org.w3c.dom.Node;
  11 import org.w3c.dom.NodeList;
  12
  13 class ElementIterator implements Iterator<Content> {
  14         private DomContent parent;
  15         private final ProvidedSession session;
  16         private final DomContentProvider provider;
  17         private final NodeList nodeList;
  18
  19         private int currentIndex;
  20         private final int length;
  21         private Element nextElement = null;
  22
  23         public ElementIterator(DomContent parent, ProvidedSession session, DomContentProvider provider, NodeList nodeList) {
  24                 this.parent = parent;
  25                 this.session = session;
  26                 this.provider = provider;
  27                 this.nodeList = nodeList;
  28
  29                 this.length = nodeList.getLength();
  30                 this.currentIndex = 0;
  31                 this.nextElement = findNext();
  32         }
  33
  34         private Element findNext() {
  35                 while (currentIndex < length) {
  36                         Node node = nodeList.item(currentIndex);
  37                         if (node instanceof Element) {
  38                                 return (Element) node;
  39                         }
  40                         currentIndex++;
  41                 }
  42                 return null;
  43         }
  44
  45         @Override
  46         public boolean hasNext() {
  47                 return nextElement != null;
  48         }
  49
  50         @Override
  51         public Content next() {
  52                 if (nextElement == null)
  53                         throw new NoSuchElementException();
  54                 Content result;
  55                 String isMount = nextElement.getAttributeNS(CrName.CR_NAMESPACE_URI, CrName.MOUNT.get().getLocalPart());
  56                 if (isMount.equals("true")) {
  57                         result = session.get(parent.getPath() + '/' + nextElement.getTagName());
  58                 }
  59
  60                 else {
  61                         result = new DomContent(session, provider, nextElement);
  62                 }
  63                 currentIndex++;
  64                 nextElement = findNext();
  65                 return result;
  66         }
  67
  68 }