org.camunda.bpm.engine.impl.tree
Class TreeWalker<T>

java.lang.Object
  org.camunda.bpm.engine.impl.tree.TreeWalker<T>

Direct Known Subclasses:

ActivityExecutionHierarchyWalker, ExecutionWalker, FlowScopeWalker

public abstract class TreeWalker<T>
extends Object

Abstract class that walks through a tree hierarchy. The subclass define the type of tree and provide the concrete walking behavior.

Author:

Thorben Lindhauer

Nested Class Summary

static class	TreeWalker.NullCondition<S>
static interface	TreeWalker.WalkCondition<S>

Field Summary

protected T	currentElement
protected List<TreeVisitor<T>>	postVisitor
protected List<TreeVisitor<T>>	preVisitor

Constructor Summary

TreeWalker(T initialElement)

Method Summary

TreeWalker<T>	addPostVisitor(TreeVisitor<T> collector)
TreeWalker<T>	addPreVisitor(TreeVisitor<T> collector)
T	getCurrentElement()
protected abstract T	nextElement()
void	walkUntil()
T	walkUntil(TreeWalker.WalkCondition<T> condition)
void	walkWhile()
T	walkWhile(TreeWalker.WalkCondition<T> condition)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

currentElement

protected T currentElement

preVisitor

protected List<TreeVisitor<T>> preVisitor

postVisitor

protected List<TreeVisitor<T>> postVisitor

Constructor Detail

TreeWalker

public TreeWalker(T initialElement)

Method Detail

nextElement

protected abstract T nextElement()

addPreVisitor

public TreeWalker<T> addPreVisitor(TreeVisitor<T> collector)

addPostVisitor

public TreeWalker<T> addPostVisitor(TreeVisitor<T> collector)

walkWhile

public void walkWhile()

walkUntil

public void walkUntil()

walkWhile

public T walkWhile(TreeWalker.WalkCondition<T> condition)

walkUntil

public T walkUntil(TreeWalker.WalkCondition<T> condition)

getCurrentElement

public T getCurrentElement()