com.fasterxml.classmate.util.ClassStack Maven / Gradle / Ivy
package com.fasterxml.classmate.util;
import java.util.ArrayList;
import com.fasterxml.classmate.ResolvedType;
import com.fasterxml.classmate.types.ResolvedRecursiveType;
/**
* Simple helper class used to keep track of 'call stack' for classes being referenced
* (as well as unbound variables)
*/
public final class ClassStack
{
protected final ClassStack _parent;
protected final Class _current;
private ArrayList _selfRefs;
public ClassStack(Class rootType) {
this(null, rootType);
}
private ClassStack(ClassStack parent, Class curr) {
_parent = parent;
_current = curr;
}
/**
* @return New stack frame, if addition is ok; null if not
*/
public ClassStack child(Class cls)
{
return new ClassStack(this, cls);
}
/**
* Method called to indicate that there is a self-reference from
* deeper down in stack pointing into type this stack frame represents.
*/
public void addSelfReference(ResolvedRecursiveType ref)
{
if (_selfRefs == null) {
_selfRefs = new ArrayList();
}
_selfRefs.add(ref);
}
/**
* Method called when type that this stack frame represents is
* fully resolved, allowing self-references to be completed
* (if there are any)
*/
public void resolveSelfReferences(ResolvedType resolved)
{
if (_selfRefs != null) {
for (ResolvedRecursiveType ref : _selfRefs) {
ref.setReference(resolved);
}
}
}
public ClassStack find(Class cls)
{
if (_current == cls) return this;
for (ClassStack curr = _parent; curr != null; curr = curr._parent) {
if (curr._current == cls) {
return curr;
}
}
return null;
}
}