/// <summary>
/// Calls <seealso cref="PageCursor.checkAndClearBoundsFlag()"/> and if {@code true} throws <seealso cref="TreeInconsistencyException"/>.
/// Should be called whenever leaving a <seealso cref="PageCursor.shouldRetry() shouldRetry-loop"/> successfully.
/// Purpose of this method is to unify <seealso cref="PageCursor"/> read behavior and exception handling.
/// </summary>
/// <param name="cursor"> <seealso cref="PageCursor"/> to check for out-of-bounds. </param>
internal static void CheckOutOfBounds(PageCursor cursor)
{
if (cursor.CheckAndClearBoundsFlag())
{
throw new TreeInconsistencyException("Some internal problem causing out of bounds: pageId:" + cursor.CurrentPageId);
}
}
protected internal virtual void CheckBounds(PageCursor cursor)
{
if (cursor.CheckAndClearBoundsFlag())
{
throw new System.InvalidOperationException(string.Format("Cursor {0} access out of bounds, page id {1:D}, offset {2:D}", cursor.ToString(), cursor.CurrentPageId, cursor.Offset));
}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: static void readKeyValuePair(org.neo4j.io.pagecache.PageCursor cursor, int offset, WritableBuffer key, WritableBuffer value) throws java.io.IOException
internal static void ReadKeyValuePair(PageCursor cursor, int offset, WritableBuffer key, WritableBuffer value)
{
long retriesLeft = MAX_LOOKUP_RETRY_COUNT;
do
{
cursor.Offset = offset;
key.GetFrom(cursor);
value.GetFrom(cursor);
} while (cursor.ShouldRetry() && (--retriesLeft) > 0);
if (cursor.CheckAndClearBoundsFlag())
{
ThrowOutOfBounds(cursor, offset);
}
if (retriesLeft == 0)
{
ThrowFailedRead(cursor, offset);
}
}
/// <summary>
/// Checks the given <seealso cref="PageCursor"/> to see if its out-of-bounds flag has been raised, and returns {@code true} if
/// that is the case <em>and</em> and out-of-bounds condition should be reported up the stack. </summary>
/// <param name="cursor"> The <seealso cref="PageCursor"/> to check the bounds flag for. </param>
/// <returns> {@code true} if an out-of-bounds condition should be reported up the stack, {@code false} otherwise. </returns>
public bool CheckForOutOfBounds(Org.Neo4j.Io.pagecache.PageCursor cursor)
{
return(cursor.CheckAndClearBoundsFlag() & this == NORMAL);
}