Modifier and Type | Field and Description |
---|---|
private java.lang.Class |
nodeClass |
private java.util.List |
nodeList |
private java.lang.Class |
skipOverClass |
Constructor and Description |
---|
CollectNodesVisitor(java.lang.Class nodeClass)
Construct a visitor
|
CollectNodesVisitor(java.lang.Class nodeClass,
java.lang.Class skipOverClass)
Construct a visitor
|
Modifier and Type | Method and Description |
---|---|
java.util.List |
getList()
Return the list of matching nodes.
|
boolean |
skipChildren(Visitable node)
Don't visit children under the skipOverClass
node, if it isn't null.
|
boolean |
stopTraversal()
Method that is called to see
if query tree traversal should be
stopped before visiting all nodes.
|
Visitable |
visit(Visitable node)
If we have found the target node, we are done.
|
boolean |
visitChildrenFirst(Visitable node)
Method that is called to see if
visit() should be called on
the children of node before it is called on node itself. |
private final java.util.List nodeList
private final java.lang.Class nodeClass
private final java.lang.Class skipOverClass
public CollectNodesVisitor(java.lang.Class nodeClass)
nodeClass
- the class of the node that
we are looking for.public CollectNodesVisitor(java.lang.Class nodeClass, java.lang.Class skipOverClass)
nodeClass
- the class of the node that
we are looking for.skipOverClass
- do not go below this
node when searching for nodeClass.public boolean visitChildrenFirst(Visitable node)
Visitor
visit()
should be called on
the children of node
before it is called on node
itself.
If this method always returns true
, the visitor will walk the
tree bottom-up. If it always returns false
, the tree is visited
top-down.visitChildrenFirst
in interface Visitor
node
- the top node of a sub-tree about to be visitedtrue
if node
's children should be visited
before node
, false
otherwisepublic boolean stopTraversal()
Visitor
stopTraversal
in interface Visitor
public boolean skipChildren(Visitable node)
skipChildren
in interface Visitor
node
- the node to processpublic java.util.List getList()
null
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