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package org.netbeans.modules.visualweb.insync.faces.refactoring;
import com.sun.source.tree.Tree;
import com.sun.source.util.TreePath;
import java.util.HashSet;
import java.util.Set;
import java.util.WeakHashMap;
import javax.lang.model.element.Element;
import org.netbeans.api.java.source.CompilationInfo;
import org.openide.filesystems.FileObject;
/**
*
* @author Jan Becicka
*/
public class ElementGripFactory {
private static ElementGripFactory instance;
private WeakHashMap <FileObject, Interval> map = new WeakHashMap();
/**
* Creates a new instance of ElementGripFactory
*/
private ElementGripFactory() {
}
public static ElementGripFactory getDefault() {
if (instance == null) {
instance = new ElementGripFactory();
}
return instance;
}
public void cleanUp() {
map.clear();
}
public ElementGrip get(FileObject fileObject, int position) {
Interval start = map.get(fileObject);
if (start==null)
return null;
try {
return (ElementGrip) start.get(position).item;
} catch (RuntimeException e) {
return start.item;
}
}
public ElementGrip getParent(ElementGrip el) {
Interval start = map.get(el.getFileObject());
return (ElementGrip) start.getParent(el);
}
public void put(FileObject parentFile, TreePath tp, CompilationInfo info) {
Interval root = map.get(parentFile);
Interval i = Interval.createInterval(tp,info, root,null, parentFile);
if (i!=null) {
map.put(parentFile,i);
}
}
private static class Interval {
long from=-1,to=-1;
Set<Interval> subintervals= new HashSet();
ElementGrip item = null;
Interval get(long position) {
if (from<=position && to >=position) {
for (Interval o:subintervals) {
Interval ob = o.get(position);
if (ob!=null)
return ob;
}
return this;
}
return null;
}
ElementGrip getParent(ElementGrip eh) {
for (Interval i:subintervals) {
if (i.item.equals(eh)) {
return this.item;
} else {
ElementGrip e = i.getParent(eh);
if (e!=null) {
return e;
}
}
}
return null;
}
public static Interval createInterval(TreePath tp, CompilationInfo info, Interval root, Interval p, FileObject parentFile) {
Tree t = tp.getLeaf();
long start = info.getTrees().getSourcePositions().getStartPosition(info.getCompilationUnit(), t);
long end = info.getTrees().getSourcePositions().getEndPosition(info.getCompilationUnit(), t);
Element current = info.getTrees().getElement(tp);
Tree.Kind kind = tp.getLeaf().getKind();
if (kind != Tree.Kind.CLASS && kind != Tree.Kind.METHOD) {
if (tp.getParentPath()==null || tp.getParentPath().getLeaf().getKind() == Tree.Kind.COMPILATION_UNIT) {
//xxx: rather workaround. should be fixed better.
return null;
} else {
return createInterval(tp.getParentPath(), info, root, p, parentFile);
}
}
Interval i = null;
if (root != null) {
Interval o = root.get(start);
if (o!= null && o.item.resolveElement(info).equals(current)) {
if (p!=null)
o.subintervals.add(p);
return null;
}
}
if (i==null)
i = new Interval();
if (i.from != start) {
i.from = start;
i.to = end;
ElementGrip currentHandle2 = new ElementGrip(tp, info);
i.item = currentHandle2;
}
if (p!=null) {
i.subintervals.add(p);
}
if (tp.getParentPath().getLeaf().getKind() == Tree.Kind.COMPILATION_UNIT) {
return i;
}
return createInterval(tp.getParentPath(), info, root, i, parentFile);
}
}
}
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