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package org.netbeans.lib.profiler.heap;

import java.util.Iterator;

/**
 *
 * @author Tomas Hurka
 */
class JavaFrameHprofGCRoot extends HprofGCRoot implements JavaFrameGCRoot {

    JavaFrameHprofGCRoot(HprofHeap h, long offset) {
        super(h,offset);
    }

    //~ Methods ------------------------------------------------------------------------------------------------------------------



    private int getThreadSerialNumber() {
        return heap.dumpBuffer.getInt(fileOffset + 1 + heap.dumpBuffer.getIDSize());
    }

    public int getFrameNumber() {
        return heap.dumpBuffer.getInt(fileOffset + 1 + heap.dumpBuffer.getIDSize() + 4);
    }

    public ThreadObjectGCRoot getThreadGCRoot() {
        int serial = getThreadSerialNumber();
        Iterator<GCRoot> gcRootsIt = heap.getGCRoots().iterator();

        while(gcRootsIt.hasNext()) {
            Object gcRoot = gcRootsIt.next();

            if (gcRoot instanceof ThreadObjectHprofGCRoot) {
                ThreadObjectHprofGCRoot threadObjGC = (ThreadObjectHprofGCRoot) gcRoot;
                if (serial == threadObjGC.getThreadSerialNumber()) {
                    return threadObjGC;
                }
            }
        }
        return null;
    }

}