/// <summary>
/// Verify that the transition from the current state into new state is valid .
/// </summary>
/// <param name="newState">The new writer state to transition into.</param>
private void ValidateTransition(WriterState newState)
{
if (!IsErrorState(this.State) && IsErrorState(newState))
{
// we can always transition into an error state if we are not already in an error state
return;
}
switch (this.State)
{
case WriterState.Start:
if (newState != WriterState.DeltaFeed)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromStart(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.DeltaEntry:
case WriterState.DeltaDeletedEntry:
case WriterState.DeltaLink:
case WriterState.DeltaDeletedLink:
if (this.CurrentScope.Item == null)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromNullEntry(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.DeltaFeed:
if (newState != WriterState.DeltaEntry && newState != WriterState.DeltaDeletedEntry &&
newState != WriterState.DeltaLink && newState != WriterState.DeltaDeletedLink)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromFeed(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.Completed:
// we should never see a state transition when in state 'Completed'
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromCompleted(this.State.ToString(), newState.ToString()));
case WriterState.Error:
if (newState != WriterState.Error)
{
// No more state transitions once we are in error state except for the fatal error
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromError(this.State.ToString(), newState.ToString()));
}
break;
default:
throw new ODataException(Strings.General_InternalError(InternalErrorCodes.ODataWriterCore_ValidateTransition_UnreachableCodePath));
}
}
private void ValidateTransition(WriterState newState)
{
if (!IsErrorState(this.State) && IsErrorState(newState))
{
// we can always transition into an error state if we are not already in an error state
return;
}
switch (this.State)
{
case WriterState.Start:
if (newState != WriterState.Feed && newState != WriterState.Entry)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromStart(this.State.ToString(), newState.ToString()));
}
if (newState == WriterState.Feed && !this.writingFeed)
{
throw new ODataException(Strings.ODataWriterCore_CannotWriteTopLevelFeedWithEntryWriter);
}
if (newState == WriterState.Entry && this.writingFeed)
{
throw new ODataException(Strings.ODataWriterCore_CannotWriteTopLevelEntryWithFeedWriter);
}
break;
case WriterState.Entry:
{
if (this.CurrentScope.Item == null)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromNullEntry(this.State.ToString(), newState.ToString()));
}
if (newState != WriterState.NavigationLink)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromEntry(this.State.ToString(), newState.ToString()));
}
}
break;
case WriterState.Feed:
if (newState != WriterState.Entry)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromFeed(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.NavigationLink:
if (newState != WriterState.NavigationLinkWithContent)
{
throw new ODataException(Strings.ODataWriterCore_InvalidStateTransition(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.NavigationLinkWithContent:
if (newState != WriterState.Feed && newState != WriterState.Entry)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromExpandedLink(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.Completed:
// we should never see a state transition when in state 'Completed'
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromCompleted(this.State.ToString(), newState.ToString()));
case WriterState.Error:
if (newState != WriterState.Error)
{
// No more state transitions once we are in error state except for the fatal error
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromError(this.State.ToString(), newState.ToString()));
}
break;
default:
throw new ODataException(Strings.General_InternalError(InternalErrorCodes.ODataWriterCore_ValidateTransition_UnreachableCodePath));
}
}
private void ValidateTransition(WriterState newState)
{
if (!IsErrorState(this.State) && IsErrorState(newState) &&
!(this.State == WriterState.Completed && newState == WriterState.Error))
{
// we can always transition into an error state if we are not already in an error state
// unless we're in a completed state trying to write an error (we can't write error after the payload
// was finished as it might introduce another top-level element in XML)
return;
}
switch (this.State)
{
case WriterState.Start:
if (newState != WriterState.Feed && newState != WriterState.Entry)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromStart(this.State.ToString(), newState.ToString()));
}
if (newState == WriterState.Feed && !this.writingFeed)
{
throw new ODataException(Strings.ODataWriterCore_CannotWriteTopLevelFeedWithEntryWriter);
}
if (newState == WriterState.Entry && this.writingFeed)
{
throw new ODataException(Strings.ODataWriterCore_CannotWriteTopLevelEntryWithFeedWriter);
}
break;
case WriterState.Entry:
if (newState != WriterState.Link)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromEntry(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.Feed:
if (newState != WriterState.Entry)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromFeed(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.Link:
if (newState != WriterState.ExpandedLink)
{
throw new ODataException(Strings.ODataWriterCore_InvalidStateTransition(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.ExpandedLink:
if (newState != WriterState.Feed && newState != WriterState.Entry)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromExpandedLink(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.Completed:
// we should never see a state transition when in state 'Completed'
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromCompleted(this.State.ToString(), newState.ToString()));
case WriterState.ODataExceptionThrown:
if (!IsErrorState(newState))
{
// once an exception has been thrown we only allow clients to write an error (or we detect a fatal exception)
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromODataExceptionThrown(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.Error:
// No more state transitions once we are in error state except for the fatal error
if (newState != WriterState.FatalExceptionThrown)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromError(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.FatalExceptionThrown:
if (newState != WriterState.FatalExceptionThrown)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromFatalExceptionThrown(this.State.ToString(), newState.ToString()));
}
break;
default:
throw new ODataException(Strings.General_InternalError(InternalErrorCodes.ODataWriterCore_ValidateTransition_UnreachableCodePath));
}
}
private void ValidateTransition(WriterState newState)
{
if (!IsErrorState(this.State) && IsErrorState(newState) &&
!(this.State == WriterState.Completed && newState == WriterState.Error))
{
// we can always transition into an error state if we are not already in an error state
// unless we're in a completed state trying to write an error (we can't write error after the payload
// was finished as it might introduce another top-level element in XML)
return;
}
switch (this.State)
{
case WriterState.Start:
if (newState != WriterState.Feed && newState != WriterState.Entry)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromStart(this.State.ToString(), newState.ToString()));
}
if (newState == WriterState.Feed && !this.writingFeed)
{
throw new ODataException(Strings.ODataWriterCore_CannotWriteTopLevelFeedWithEntryWriter);
}
if (newState == WriterState.Entry && this.writingFeed)
{
throw new ODataException(Strings.ODataWriterCore_CannotWriteTopLevelEntryWithFeedWriter);
}
break;
case WriterState.Entry:
if (newState != WriterState.Link)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromEntry(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.Feed:
if (newState != WriterState.Entry)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromFeed(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.Link:
if (newState != WriterState.ExpandedLink)
{
throw new ODataException(Strings.ODataWriterCore_InvalidStateTransition(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.ExpandedLink:
if (newState != WriterState.Feed && newState != WriterState.Entry)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromExpandedLink(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.Completed:
// we should never see a state transition when in state 'Completed'
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromCompleted(this.State.ToString(), newState.ToString()));
case WriterState.ODataExceptionThrown:
if (!IsErrorState(newState))
{
// once an exception has been thrown we only allow clients to write an error (or we detect a fatal exception)
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromODataExceptionThrown(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.Error:
// No more state transitions once we are in error state except for the fatal error
if (newState != WriterState.FatalExceptionThrown)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromError(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.FatalExceptionThrown:
if (newState != WriterState.FatalExceptionThrown)
{
throw new ODataException(Strings.ODataWriterCore_InvalidTransitionFromFatalExceptionThrown(this.State.ToString(), newState.ToString()));
}
break;
default:
throw new ODataException(Strings.General_InternalError(InternalErrorCodes.ODataWriterCore_ValidateTransition_UnreachableCodePath));
}
}
private void ValidateTransition(WriterState newState)
{
if (IsErrorState(this.State) || !IsErrorState(newState))
{
switch (this.State)
{
case WriterState.Start:
if ((newState != WriterState.Feed) && (newState != WriterState.Entry))
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidTransitionFromStart(this.State.ToString(), newState.ToString()));
}
if ((newState == WriterState.Feed) && !this.writingFeed)
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_CannotWriteTopLevelFeedWithEntryWriter);
}
if ((newState != WriterState.Entry) || !this.writingFeed)
{
break;
}
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_CannotWriteTopLevelEntryWithFeedWriter);
case WriterState.Entry:
if (this.CurrentScope.Item == null)
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidTransitionFromNullEntry(this.State.ToString(), newState.ToString()));
}
if (newState != WriterState.NavigationLink)
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidTransitionFromEntry(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.Feed:
if (newState != WriterState.Entry)
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidTransitionFromFeed(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.NavigationLink:
if (newState != WriterState.NavigationLinkWithContent)
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidStateTransition(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.NavigationLinkWithContent:
if ((newState != WriterState.Feed) && (newState != WriterState.Entry))
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidTransitionFromExpandedLink(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.Completed:
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidTransitionFromCompleted(this.State.ToString(), newState.ToString()));
case WriterState.Error:
if (newState != WriterState.Error)
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidTransitionFromError(this.State.ToString(), newState.ToString()));
}
break;
default:
throw new ODataException(Microsoft.Data.OData.Strings.General_InternalError(InternalErrorCodes.ODataWriterCore_ValidateTransition_UnreachableCodePath));
}
}
}
private void ValidateTransition(WriterState newState)
{
if (IsErrorState(this.State) || !IsErrorState(newState))
{
switch (this.State)
{
case WriterState.Start:
if ((newState != WriterState.Feed) && (newState != WriterState.Entry))
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidTransitionFromStart(this.State.ToString(), newState.ToString()));
}
if ((newState == WriterState.Feed) && !this.writingFeed)
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_CannotWriteTopLevelFeedWithEntryWriter);
}
if ((newState != WriterState.Entry) || !this.writingFeed)
{
break;
}
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_CannotWriteTopLevelEntryWithFeedWriter);
case WriterState.Entry:
if (this.CurrentScope.Item == null)
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidTransitionFromNullEntry(this.State.ToString(), newState.ToString()));
}
if (newState != WriterState.NavigationLink)
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidTransitionFromEntry(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.Feed:
if (newState != WriterState.Entry)
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidTransitionFromFeed(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.NavigationLink:
if (newState != WriterState.NavigationLinkWithContent)
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidStateTransition(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.NavigationLinkWithContent:
if ((newState != WriterState.Feed) && (newState != WriterState.Entry))
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidTransitionFromExpandedLink(this.State.ToString(), newState.ToString()));
}
break;
case WriterState.Completed:
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidTransitionFromCompleted(this.State.ToString(), newState.ToString()));
case WriterState.Error:
if (newState != WriterState.Error)
{
throw new ODataException(Microsoft.Data.OData.Strings.ODataWriterCore_InvalidTransitionFromError(this.State.ToString(), newState.ToString()));
}
break;
default:
throw new ODataException(Microsoft.Data.OData.Strings.General_InternalError(InternalErrorCodes.ODataWriterCore_ValidateTransition_UnreachableCodePath));
}
}
}