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MarkBasedNodeVisitor.java

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package org.netbeans.lib.profiler.results.cpu.marking;

import org.netbeans.lib.profiler.global.TransactionalSupport;
import org.netbeans.lib.profiler.results.cpu.cct.CPUCCTVisitorAdapter;
import org.netbeans.lib.profiler.results.cpu.cct.nodes.CategoryCPUCCTNode;
import java.util.Stack;


/**
 *
 * @author Jaroslav Bachorik
 */
00053 public class MarkBasedNodeVisitor extends CPUCCTVisitorAdapter implements MarkingEngine.StateObserver {
    //~ Instance fields ----------------------------------------------------------------------------------------------------------

    volatile boolean resetFlag = false;
    private Mark parentMark = null;
    private Stack markStack;
    private final TransactionalSupport transaction = new TransactionalSupport();

    //~ Constructors -------------------------------------------------------------------------------------------------------------

    /**
     * Creates a new instance of MarkTimer
     */
00066     public MarkBasedNodeVisitor() {
        this.markStack = new Stack();
    }

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

    public void afterWalk() {
        markStack.clear();
        parentMark = null;
        transaction.endTrans();
    }

    public void beforeWalk() {
        transaction.beginTrans(true);
        parentMark = null;
        resetFlag = false;
    }

    public void beginTrans(final boolean mutable) {
        transaction.beginTrans(mutable);
    }

    public void endTrans() {
        if (resetFlag) {
            this.markStack = new Stack();
            resetFlag = false;
        }

        transaction.endTrans();
    }

    public synchronized void onReset() {
        resetFlag = true;
        transaction.endTrans();
    }

    public void stateChanged(MarkingEngine instance) {
        reset();
    }

    public void visit(final CategoryCPUCCTNode node) {
        parentMark = (Mark) (markStack.isEmpty() ? null : markStack.peek());
        markStack.push(node.getMark());
    }

    public void visitPost(final CategoryCPUCCTNode node) {
        markStack.pop();
        parentMark = (Mark) (markStack.isEmpty() ? null : markStack.peek());
    }

    protected final Mark getCurrentMark() {
        return (Mark) (markStack.isEmpty() ? Mark.DEFAULT : markStack.peek());
    }

    protected final Mark getParentMark() {
        return (parentMark != null) ? parentMark : Mark.DEFAULT;
    }

    protected synchronized boolean isReset() {
        return resetFlag;
    }

    private void reset() {
        resetFlag = true;
    }
}

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