1 package org
.argeo
.eclipse
.ui
.jcr
;
3 import java
.util
.ArrayList
;
7 import javax
.jcr
.NodeIterator
;
8 import javax
.jcr
.RepositoryException
;
9 import javax
.jcr
.Session
;
11 import org
.apache
.commons
.logging
.Log
;
12 import org
.apache
.commons
.logging
.LogFactory
;
13 import org
.argeo
.eclipse
.ui
.AbstractTreeContentProvider
;
14 import org
.argeo
.eclipse
.ui
.EclipseUiException
;
16 /** Canonical implementation of tree content provider manipulating JCR nodes. */
17 public abstract class AbstractNodeContentProvider
extends
18 AbstractTreeContentProvider
{
19 private static final long serialVersionUID
= -4905836490027272569L;
21 private final static Log log
= LogFactory
22 .getLog(AbstractNodeContentProvider
.class);
24 private Session session
;
26 public AbstractNodeContentProvider(Session session
) {
27 this.session
= session
;
31 * Whether this path is a base path (and thus has no parent). By default it
32 * returns true if path is '/' (root node)
34 protected Boolean
isBasePath(String path
) {
36 return path
.equals("/");
40 public Object
[] getChildren(Object element
) {
42 if (element
instanceof Node
) {
44 Node node
= (Node
) element
;
45 children
= getChildren(node
);
46 } catch (RepositoryException e
) {
47 throw new EclipseUiException("Cannot get children of " + element
, e
);
49 } else if (element
instanceof WrappedNode
) {
50 WrappedNode wrappedNode
= (WrappedNode
) element
;
52 children
= getChildren(wrappedNode
.getNode());
53 } catch (RepositoryException e
) {
54 throw new EclipseUiException("Cannot get children of "
57 } else if (element
instanceof NodesWrapper
) {
58 NodesWrapper node
= (NodesWrapper
) element
;
59 children
= node
.getChildren();
61 children
= super.getChildren(element
);
64 children
= sort(element
, children
);
68 /** Do not sort by default. To be overidden to provide custom sort. */
69 protected Object
[] sort(Object parent
, Object
[] children
) {
74 * To be overridden in order to filter out some nodes. Does nothing by
75 * default. The provided list is a temporary one and can thus be modified
76 * directly . (e.g. via an iterator)
78 protected List
<Node
> filterChildren(List
<Node
> children
)
79 throws RepositoryException
{
83 protected Object
[] getChildren(Node node
) throws RepositoryException
{
84 List
<Node
> nodes
= new ArrayList
<Node
>();
85 for (NodeIterator nit
= node
.getNodes(); nit
.hasNext();)
86 nodes
.add(nit
.nextNode());
87 nodes
= filterChildren(nodes
);
88 return nodes
.toArray();
92 public Object
getParent(Object element
) {
93 if (element
instanceof Node
) {
94 Node node
= (Node
) element
;
96 String path
= node
.getPath();
100 return node
.getParent();
101 } catch (RepositoryException e
) {
102 log
.warn("Cannot get parent of " + element
+ ": " + e
);
105 } else if (element
instanceof WrappedNode
) {
106 WrappedNode wrappedNode
= (WrappedNode
) element
;
107 return wrappedNode
.getParent();
108 } else if (element
instanceof NodesWrapper
) {
109 NodesWrapper nodesWrapper
= (NodesWrapper
) element
;
110 return this.getParent(nodesWrapper
.getNode());
112 return super.getParent(element
);
116 public boolean hasChildren(Object element
) {
118 if (element
instanceof Node
) {
119 Node node
= (Node
) element
;
120 return node
.hasNodes();
121 } else if (element
instanceof WrappedNode
) {
122 WrappedNode wrappedNode
= (WrappedNode
) element
;
123 return wrappedNode
.getNode().hasNodes();
124 } else if (element
instanceof NodesWrapper
) {
125 NodesWrapper nodesWrapper
= (NodesWrapper
) element
;
126 return nodesWrapper
.hasChildren();
129 } catch (RepositoryException e
) {
130 throw new EclipseUiException("Cannot check whether " + element
131 + " has children", e
);
133 return super.hasChildren(element
);
136 public Session
getSession() {