import org.eclipse.core.runtime.IStatus;

import org.eclipse.core.runtime.jobs.ISchedulingRule;

import org.eclipse.wst.validation.internal.provisional.core.IValidatorJob;

  /*

   * (non-Javadoc)

   * 

   * @see org.eclipse.wst.validation.internal.provisional.core.IValidatorJob#validateInJob(org.eclipse.wst.validation.internal.provisional.core.IValidationContext,

   *      org.eclipse.wst.validation.internal.provisional.core.IReporter)

   */

  public IStatus validateInJob(IValidationContext helper, IReporter reporter) throws ValidationException

  {

    ValidatorMetaData vmd = ValidationRegistryReader.getReader().getValidatorMetaData(this);

    String validatorName = vmd.getValidatorDisplayName();

    // We need to ensure that the context is an IProjectValidationContext. The

    // limitation of using an IValidationContext is that it does not readily

    // provide the project the validator is being invoked upon.

    if (!(helper instanceof IProjectValidationContext))

    {

      throw new ValidationException(new LocalizedMessage(IMessage.HIGH_SEVERITY, ResourceHandler.getExternalizedMessage(ResourceConstants.VBF_WRONG_CONTEXT_FOR_DELEGATE, new String[] { validatorName })));

    }

    IProjectValidationContext projectContext = (IProjectValidationContext) helper;

    IProject project = projectContext.getProject();

    ValidatorDelegateDescriptor delegateDescriptor = null;

    try

    {

      ProjectConfiguration projectConfig = ConfigurationManager.getManager().getProjectConfiguration(project);

      delegateDescriptor = projectConfig.getDelegateDescriptor(vmd);

    }

    catch (InvocationTargetException e)

    {

      // Already dealt with by the framework.

    }

    finally

    {

      if (delegateDescriptor == null)

      {

        throw new ValidationException(new LocalizedMessage(IMessage.HIGH_SEVERITY, ResourceHandler.getExternalizedMessage(ResourceConstants.VBF_NO_DELEGATE, new String[] { vmd.getValidatorDisplayName() })));

      }

    }

    IValidatorJob delegate = (IValidatorJob)delegateDescriptor.getValidator();

    // We need to make it look like this validator is the one generating

    // messages so we wrap the reporter and use this validator as the source.

    // The validation framework does not recognize our validators because they

    // are not registered directly with the framework.

    // We could make them work like the aggregated validators but that would

    // create problems with markers not being cleaned up if someone switches

    // validators.

    // TODO : Maybe we could clear all the markers generated by a delegate when

    // the user chooses a different delegate implementation?

    DelegatingReporter delegatingReporter = new DelegatingReporter(this, reporter);

    IStatus status = delegate.validateInJob(helper, delegatingReporter);

    return status;

  }

  /*

   * (non-Javadoc)

   * 

   * @see org.eclipse.wst.validation.internal.provisional.core.IValidatorJob#getSchedulingRule(org.eclipse.wst.validation.internal.provisional.core.IValidationContext)

   */

  public ISchedulingRule getSchedulingRule(IValidationContext helper)

  {

    return null;

  }