import org.chromium.debug.core.model.DebugTargetImpl;

import org.chromium.debug.core.model.Value;

import org.eclipse.debug.core.model.IDebugTarget;

import org.eclipse.debug.core.model.ISourceLocator;

import org.eclipse.debug.core.model.IValue;

import org.eclipse.debug.core.model.IWatchExpression;

import org.eclipse.debug.core.sourcelookup.ISourceLookupDirector;

public abstract class OpenFunctionAction<ELEMENT> implements IObjectActionDelegate,

    IActionDelegate2 {

  public static class ForVariable extends OpenFunctionAction<Variable> {

    @Override

    protected Variable castElement(Object element) {

      if (element instanceof Variable == false) {

        return null;

      }

      return (Variable) element;

    }

    @Override

    protected JsValue getJsValue(Variable variable) {

      JsVariable jsVariable = variable.getJsVariable();

      return jsVariable.getValue();

    }

    @Override

    protected DebugTargetImpl getDebugTarget(Variable variable) {

      return variable.getDebugTarget();

    }

  }

  public static class ForExpression extends OpenFunctionAction<IWatchExpression> {

    @Override

    protected IWatchExpression castElement(Object element) {

      if (element instanceof IWatchExpression == false) {

        return null;

      }

      return (IWatchExpression) element;

    }

    @Override

    protected DebugTargetImpl getDebugTarget(IWatchExpression expression) {

      IDebugTarget debugTarget = expression.getDebugTarget();

      if (debugTarget instanceof DebugTargetImpl == false) {

        return null;

      }

      return (DebugTargetImpl) debugTarget;

    }

    @Override

    protected JsValue getJsValue(IWatchExpression expression) {

      IValue value = expression.getValue();

      if (value instanceof Value == false) {

        return null;

      }

      Value chromiumValue = (Value) value;

      return chromiumValue.getJsValue();

    }

  }

    final ELEMENT variable = getElementFromSelection(selection);

    final JsFunction jsFunction = getJsFunctionFromElement(variable);

  private Runnable createRunnable(final ELEMENT element, final JsFunction jsFunction) {

        DebugTargetImpl debugTarget = getDebugTarget(element);

        if (debugTarget == null) {

          return;

        }

        ISourceLocator sourceLocator = debugTarget.getLaunch().getSourceLocator();

        if (sourceLocator instanceof ISourceLookupDirector == false) {

          return;

        }

        ISourceLookupDirector director = (ISourceLookupDirector) sourceLocator;

        Object sourceObject = director.getSourceElement(script);

        if (sourceObject instanceof IFile == false) {

          return;

        }

        IFile resource = (IFile) sourceObject;

  private JsFunction getJsFunctionFromElement(ELEMENT element) {

    if (element == null) {

    JsValue jsValue = getJsValue(element);

    if (jsValue == null) {

      return null;

    }

  private ELEMENT getElementFromSelection(ISelection selection) {

    ELEMENT typedElement = castElement(element);

    return typedElement;

  protected abstract ELEMENT castElement(Object element);

  protected abstract JsValue getJsValue(ELEMENT element);

  protected abstract DebugTargetImpl getDebugTarget(ELEMENT element);