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.ArgeoNamespace;
   7 import org.argeo.api.acr.Content;
   8 import org.argeo.api.acr.CrName;
   9 import org.argeo.api.acr.spi.ProvidedSession;
  10 import org.w3c.dom.Element;
  11 import org.w3c.dom.Node;
  12 import org.w3c.dom.NodeList;
  13
  14 class ElementIterator implements Iterator<Content> {
  15         private DomContent parent;
  16         private final ProvidedSession session;
  17         private final DomContentProvider provider;
  18         private final NodeList nodeList;
  19
  20         private int currentIndex;
  21         private final int length;
  22         private Element nextElement = null;
  23
  24         public ElementIterator(DomContent parent, ProvidedSession session, DomContentProvider provider, NodeList nodeList) {
  25                 this.parent = parent;
  26                 this.session = session;
  27                 this.provider = provider;
  28                 this.nodeList = nodeList;
  29
  30                 this.length = nodeList.getLength();
  31                 this.currentIndex = 0;
  32                 this.nextElement = findNext();
  33         }
  34
  35         private Element findNext() {
  36                 while (currentIndex < length) {
  37                         Node node = nodeList.item(currentIndex);
  38                         if (node instanceof Element) {
  39                                 return (Element) node;
  40                         }
  41                         currentIndex++;
  42                 }
  43                 return null;
  44         }
  45
  46         @Override
  47         public boolean hasNext() {
  48                 return nextElement != null;
  49         }
  50
  51         @Override
  52         public Content next() {
  53                 if (nextElement == null)
  54                         throw new NoSuchElementException();
  55                 Content result;
  56                 String isMount = nextElement.getAttributeNS(ArgeoNamespace.CR_NAMESPACE_URI, CrName.mount.qName().getLocalPart());
  57                 if (isMount.equals("true")) {
  58                         result = session.get(parent.getPath() + '/' + nextElement.getTagName());
  59                 }
  60
  61                 else {
  62                         result = new DomContent(session, provider, nextElement);
  63                 }
  64                 currentIndex++;
  65                 nextElement = findNext();
  66                 return result;
  67         }
  68
  69 }