NodesWrapper.java

   1 package org.argeo.eclipse.ui.jcr;
   2
   3 import java.util.ArrayList;
   4 import java.util.List;
   5
   6 import javax.jcr.Node;
   7 import javax.jcr.NodeIterator;
   8 import javax.jcr.RepositoryException;
   9
  10 import org.argeo.ArgeoException;
  11
  12 /**
  13  * Element of tree which is based on a node, but whose children are not
  14  * necessarily this node children.
  15  */
  16 public class NodesWrapper {
  17         private final Node node;
  18
  19         public NodesWrapper(Node node) {
  20                 super();
  21                 this.node = node;
  22         }
  23
  24         protected List<WrappedNode> getWrappedNodes() throws RepositoryException {
  25                 List<WrappedNode> nodes = new ArrayList<WrappedNode>();
  26                 for (NodeIterator nit = node.getNodes(); nit.hasNext();)
  27                         nodes.add(new WrappedNode(this, nit.nextNode()));
  28                 return nodes;
  29         }
  30
  31         public Object[] getChildren() {
  32                 try {
  33                         return getWrappedNodes().toArray();
  34                 } catch (RepositoryException e) {
  35                         throw new ArgeoException("Cannot get wrapped children", e);
  36                 }
  37         }
  38
  39         /**
  40          * @return true by default because we don't want to compute the wrapped
  41          *         nodes twice
  42          */
  43         public Boolean hasChildren() {
  44                 return true;
  45         }
  46
  47         public Node getNode() {
  48                 return node;
  49         }
  50
  51         @Override
  52         public int hashCode() {
  53                 return node.hashCode();
  54         }
  55
  56         @Override
  57         public boolean equals(Object obj) {
  58                 if (obj instanceof NodesWrapper)
  59                         return node.equals(((NodesWrapper) obj).getNode());
  60                 else
  61                         return false;
  62         }
  63
  64         public String toString() {
  65                 return "nodes wrapper based on " + node;
  66         }
  67 }