/// <summary>Compares two HierarchyIds by their values.</summary>
/// <param name="hid1"> a HierarchyId to compare </param>
/// <param name="hid2"> a HierarchyId to compare </param>
/// <returns>
/// A 32-bit signed integer that indicates the lexical relationship between the two comparands.
/// Value Condition Less than zero: hid1 is less than hid2.
/// Zero: hid1 equals hid2.
/// Greater than zero: hid1 is greater than hid2.
/// </returns>
public static int Compare(HierarchyId hid1, HierarchyId hid2)
{
int[][] numArray1 = (object)hid1 == null ? (int[][])null : hid1._nodes;
int[][] numArray2 = (object)hid2 == null ? (int[][])null : hid2._nodes;
if (numArray1 == null && numArray2 == null)
{
return(0);
}
if (numArray1 == null)
{
return(-1);
}
if (numArray2 == null)
{
return(1);
}
int num1 = Math.Min(numArray1.Length, numArray2.Length);
for (int index = 0; index < num1; ++index)
{
int num2 = HierarchyId.CompareIntArrays(numArray1[index], numArray2[index]);
if (num2 != 0)
{
return(num2);
}
}
if (hid1._nodes.Length > num1)
{
return(1);
}
return(hid2._nodes.Length > num1 ? -1 : 0);
}
/// <summary>Returns a child node of the parent.</summary>
/// <param name="child1"> null or the hierarchyid of a child of the current node. </param>
/// <param name="child2"> null or the hierarchyid of a child of the current node. </param>
/// <returns>
/// Returns one child node that is a descendant of the parent.
/// If parent is null, returns null.
/// If parent is not null, and both child1 and child2 are null, returns a child of parent.
/// If parent and child1 are not null, and child2 is null, returns a child of parent greater than child1.
/// If parent and child2 are not null and child1 is null, returns a child of parent less than child2.
/// If parent, child1, and child2 are not null, returns a child of parent greater than child1 and less than child2.
/// If child1 is not null and not a child of parent, an exception is raised.
/// If child2 is not null and not a child of parent, an exception is raised.
/// If child1 >= child2, an exception is raised.
/// </returns>
public HierarchyId GetDescendant(HierarchyId child1, HierarchyId child2)
{
if (this._nodes == null)
{
return(new HierarchyId((string)null));
}
if (child1 != (HierarchyId)null && ((int)child1.GetLevel() != (int)this.GetLevel() + 1 || !child1.IsDescendantOf(this)))
{
throw new ArgumentException(string.Format((IFormatProvider)CultureInfo.InvariantCulture, "HierarchyId.GetDescendant failed because '{0}' must be a child of 'this'. '{0}' was '{1}' and 'this' was '{2}'.", (object)nameof(child1), (object)child1, (object)this.ToString()), nameof(child1));
}
if (child2 != (HierarchyId)null && ((int)child2.GetLevel() != (int)this.GetLevel() + 1 || !child2.IsDescendantOf(this)))
{
throw new ArgumentException(string.Format((IFormatProvider)CultureInfo.InvariantCulture, "HierarchyId.GetDescendant failed because '{0}' must be a child of 'this'. '{0}' was '{1}' and 'this' was '{2}'.", (object)nameof(child2), (object)child1, (object)this.ToString()), nameof(child2));
}
if (child1 == (HierarchyId)null && child2 == (HierarchyId)null)
{
return(new HierarchyId(this.ToString() + (object)1 + "/"));
}
if (child1 == (HierarchyId)null)
{
HierarchyId hierarchyId = new HierarchyId(child2.ToString());
int[] numArray = ((IEnumerable <int[]>)hierarchyId._nodes).Last <int[]>();
--numArray[numArray.Length - 1];
return(new HierarchyId("/" + string.Join("/", ((IEnumerable <int[]>)hierarchyId._nodes).Select <int[], string>(new Func <int[], string>(HierarchyId.IntArrayToStirng))) + "/"));
}
if (child2 == (HierarchyId)null)
{
HierarchyId hierarchyId = new HierarchyId(child1.ToString());
int[] numArray = ((IEnumerable <int[]>)hierarchyId._nodes).Last <int[]>();
++numArray[numArray.Length - 1];
return(new HierarchyId("/" + string.Join("/", ((IEnumerable <int[]>)hierarchyId._nodes).Select <int[], string>(new Func <int[], string>(HierarchyId.IntArrayToStirng))) + "/"));
}
int[] array1 = ((IEnumerable <int[]>)child1._nodes).Last <int[]>();
int[] array2 = ((IEnumerable <int[]>)child2._nodes).Last <int[]>();
if (HierarchyId.CompareIntArrays(array1, array2) >= 0)
{
throw new ArgumentException(string.Format((IFormatProvider)CultureInfo.InvariantCulture, "HierarchyId.GetDescendant failed because 'child1' must be less than 'child2'. 'child1' was '{0}' and 'child2' was '{1}'.", (object)child1, (object)child2), nameof(child1));
}
int index = 0;
while (index < array1.Length && array1[index] >= array2[index])
{
++index;
}
int[] array = ((IEnumerable <int>)array1).Take <int>(index + 1).ToArray <int>();
if (array[index] + 1 < array2[index])
{
++array[index];
}
else
{
array = ((IEnumerable <int>)array).Concat <int>((IEnumerable <int>) new int[1]
{
1
}).ToArray <int>();
}
return(new HierarchyId("/" + string.Join("/", ((IEnumerable <int[]>) this._nodes).Select <int[], string>(new Func <int[], string>(HierarchyId.IntArrayToStirng))) + "/" + HierarchyId.IntArrayToStirng((IEnumerable <int>)array) + "/"));
}
/// <summary>Returns true if this is a descendant of parent.</summary>
/// <returns>True if this is a descendant of parent.</returns>
/// <param name="parent">parent</param>
public bool IsDescendantOf(HierarchyId parent)
{
if (parent == (HierarchyId)null)
{
return(true);
}
if (this._nodes == null || (int)parent.GetLevel() > (int)this.GetLevel())
{
return(false);
}
for (int index = 0; index < (int)parent.GetLevel(); ++index)
{
if (HierarchyId.CompareIntArrays(this._nodes[index], parent._nodes[index]) != 0)
{
return(false);
}
}
return(true);
}