class RenameLabels.ProcessLabels extends java.lang.Object implements NodeTraversal.ScopedCallback
Modifier and Type | Field and Description |
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(package private) java.util.ArrayList<java.lang.String> |
names |
(package private) java.util.Deque<RenameLabels.LabelNamespace> |
namespaceStack |
Constructor and Description |
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ProcessLabels() |
Modifier and Type | Method and Description |
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void |
enterScope(NodeTraversal nodeTraversal)
Called immediately after entering a new scope.
|
void |
exitScope(NodeTraversal nodeTraversal)
Called immediately before exiting a scope.
|
(package private) RenameLabels.LabelInfo |
getLabelInfo(java.lang.String name) |
(package private) java.lang.String |
getNameForId(int id) |
boolean |
shouldTraverse(NodeTraversal nodeTraversal,
Node node,
Node parent)
shouldTraverse is call when descending into the Node tree, so it is used
here to build the context for label renames.
|
void |
visit(NodeTraversal nodeTraversal,
Node node,
Node parent)
Delegate the actual processing of the node to visitLabel and
visitBreakOrContinue.
|
private void |
visitBreakOrContinue(Node node)
Rename label references in breaks and continues.
|
private void |
visitLabel(Node node,
Node parent)
Rename or remove labels.
|
final java.util.Deque<RenameLabels.LabelNamespace> namespaceStack
final java.util.ArrayList<java.lang.String> names
public void enterScope(NodeTraversal nodeTraversal)
NodeTraversal.ScopedCallback
enterScope
in interface NodeTraversal.ScopedCallback
public void exitScope(NodeTraversal nodeTraversal)
NodeTraversal.ScopedCallback
exitScope
in interface NodeTraversal.ScopedCallback
public boolean shouldTraverse(NodeTraversal nodeTraversal, Node node, Node parent)
Visits a node in pre order (before visiting its children) and decides
whether this node's children should be traversed. If children are
traversed, they will be visited by
NodeTraversal.Callback.visit(NodeTraversal, Node, Node)
in postorder.
Implementations can have side effects (e.g. modifying the parse tree).
shouldTraverse
in interface NodeTraversal.Callback
public void visit(NodeTraversal nodeTraversal, Node node, Node parent)
Visits a node in postorder (after its children have been visited).
A node is visited only if all its parents should be traversed
(NodeTraversal.Callback.shouldTraverse(NodeTraversal, Node, Node)
).
Implementations can have side effects (e.g. modifying the parse tree).
visit
in interface NodeTraversal.Callback
private void visitBreakOrContinue(Node node)
node
- The break or continue node.private void visitLabel(Node node, Node parent)
node
- The label node.parent
- The parent of the label node.java.lang.String getNameForId(int id)
id
- The id, which is the depth of the label in the current context,
for which to get a short name.RenameLabels.LabelInfo getLabelInfo(java.lang.String name)
name
- The name to retrieve information about.