diff --git a/jre/src/main/java/com/azure/data/cosmos/core/UtfAnyString.java b/jre/src/main/java/com/azure/data/cosmos/core/UtfAnyString.java
new file mode 100644
index 0000000..db2627d
--- /dev/null
+++ b/jre/src/main/java/com/azure/data/cosmos/core/UtfAnyString.java
@@ -0,0 +1,543 @@
+package Microsoft.Azure.Cosmos.Core.Utf8;
+
+// ------------------------------------------------------------
+//  Copyright (c) Microsoft Corporation.  All rights reserved.
+// ------------------------------------------------------------
+
+//C# TO JAVA CONVERTER TODO TASK: There is no preprocessor in Java:
+///#pragma warning disable CA2225 // Operator overloads have named alternates
+
+// ReSharper disable once UseNameofExpression
+
+/** A string whose memory representation may be either UTF8 or UTF16.
+ 
+ This type supports polymorphic use of <see cref="string" /> and <see cref="Utf8String" />
+ when equality, hashing, and comparison are needed against either encoding.  An API leveraging
+ <see cref="UtfAnyString" /> can avoid separate method overloads while still accepting either
+ encoding without imposing additional allocations.
+ 
+*/
+//C# TO JAVA CONVERTER TODO TASK: Java annotations will not correspond to .NET attributes:
+//ORIGINAL LINE: [DebuggerDisplay("{ToString()}")] public readonly struct UtfAnyString : IEquatable<UtfAnyString>, IComparable<UtfAnyString>, IEquatable<Utf8String>, IComparable<Utf8String>, IEquatable<string>, IComparable<string>
+//C# TO JAVA CONVERTER WARNING: Java does not allow user-defined value types. The behavior of this class may differ from the original:
+//ORIGINAL LINE: [DebuggerDisplay("{ToString()}")] public readonly struct UtfAnyString : IEquatable<UtfAnyString>, IComparable<UtfAnyString>, IEquatable<Utf8String>, IComparable<Utf8String>, IEquatable<string>, IComparable<string>
+//C# TO JAVA CONVERTER WARNING: Java has no equivalent to the C# readonly struct:
+public final class UtfAnyString implements IEquatable<UtfAnyString>, java.lang.Comparable<UtfAnyString>, IEquatable<Utf8String>, java.lang.Comparable<Utf8String>, IEquatable<String>, java.lang.Comparable<String>
+{
+	public static UtfAnyString getEmpty()
+	{
+		return "";
+	}
+
+	private Object buffer;
+
+//C# TO JAVA CONVERTER TODO TASK: Java annotations will not correspond to .NET attributes:
+//ORIGINAL LINE: [MethodImpl(MethodImplOptions.AggressiveInlining)] public UtfAnyString(string utf16String)
+	public UtfAnyString()
+	{
+	}
+
+	public UtfAnyString(String utf16String)
+	{
+		this.buffer = utf16String;
+	}
+
+//C# TO JAVA CONVERTER TODO TASK: Java annotations will not correspond to .NET attributes:
+//ORIGINAL LINE: [MethodImpl(MethodImplOptions.AggressiveInlining)] public UtfAnyString(Utf8String utf8String)
+	public UtfAnyString(Utf8String utf8String)
+	{
+		this.buffer = utf8String;
+	}
+
+	public boolean getIsUtf8()
+	{
+		return this.buffer instanceof Utf8String;
+	}
+
+	public boolean getIsUtf16()
+	{
+		return this.buffer instanceof String;
+	}
+
+	/** True if the length is empty.
+	*/
+	public boolean getIsNull()
+	{
+		return null == this.buffer;
+	}
+
+	/** True if the length is empty.
+	*/
+	public boolean getIsEmpty()
+	{
+		if (null == this.buffer)
+		{
+			return false;
+		}
+
+		switch (this.buffer)
+		{
+//C# TO JAVA CONVERTER TODO TASK: Java has no equivalent to C# pattern variables in 'case' statements:
+//ORIGINAL LINE: case string s:
+			case String s:
+				return s.Length == 0;
+			default:
+				return ((Utf8String)this.buffer).getIsEmpty();
+		}
+	}
+
+//C# TO JAVA CONVERTER TODO TASK: The following operator overload is not converted by C# to Java Converter:
+	public static implicit operator UtfAnyString(String utf16String)
+	{
+		return new UtfAnyString(utf16String);
+	}
+
+//C# TO JAVA CONVERTER TODO TASK: The following operator overload is not converted by C# to Java Converter:
+	public static implicit operator string(UtfAnyString str)
+	{
+		return str.buffer == null ? null : str.buffer.toString();
+	}
+
+	@Override
+	public String toString()
+	{
+		// ReSharper disable once AssignNullToNotNullAttribute
+		return this.buffer == null ? null : this.buffer.toString();
+	}
+
+	public Utf8String ToUtf8String()
+	{
+		if (null == this.buffer)
+		{
+			return null;
+		}
+
+		switch (this.buffer)
+		{
+//C# TO JAVA CONVERTER TODO TASK: Java has no equivalent to C# pattern variables in 'case' statements:
+//ORIGINAL LINE: case string s:
+			case String s:
+				return Utf8String.TranscodeUtf16(s);
+			default:
+				return (Utf8String)this.buffer;
+		}
+	}
+
+	public boolean ReferenceEquals(UtfAnyString other)
+	{
+		return this.buffer == other.buffer;
+	}
+
+	public boolean equals(UtfAnyString other)
+	{
+		if (null == this.buffer)
+		{
+			return null == other.buffer;
+		}
+
+		switch (this.buffer)
+		{
+//C# TO JAVA CONVERTER TODO TASK: Java has no equivalent to C# pattern variables in 'case' statements:
+//ORIGINAL LINE: case string s:
+			case String s:
+				return other.equals(s);
+			default:
+				return other.equals((Utf8String)this.buffer);
+		}
+	}
+
+	public boolean equals(Utf8Span other)
+	{
+		return other.equals(this.buffer);
+	}
+
+	@Override
+	public boolean equals(Object obj)
+	{
+		switch (obj)
+		{
+//C# TO JAVA CONVERTER TODO TASK: Java has no equivalent to C# pattern variables in 'case' statements:
+//ORIGINAL LINE: case string s:
+			case String s:
+				return this.equals(s);
+//C# TO JAVA CONVERTER TODO TASK: Java has no equivalent to C# pattern variables in 'case' statements:
+//ORIGINAL LINE: case Utf8String s:
+			case Utf8String s:
+				return this.equals(s);
+//C# TO JAVA CONVERTER TODO TASK: Java has no equivalent to C# pattern variables in 'case' statements:
+//ORIGINAL LINE: case UtfAnyString s:
+			case UtfAnyString s:
+				return this.equals(s);
+		}
+
+		return false;
+	}
+
+	public boolean equals(Utf8String other)
+	{
+		if (null == other)
+		{
+			return null == this.buffer;
+		}
+
+		return other.equals(this.buffer);
+	}
+
+	public boolean equals(String other)
+	{
+		if (null == this.buffer)
+		{
+			return null == other;
+		}
+
+		switch (this.buffer)
+		{
+//C# TO JAVA CONVERTER TODO TASK: Java has no equivalent to C# pattern variables in 'case' statements:
+//ORIGINAL LINE: case string s:
+			case String s:
+				return String.equals(s, other);
+			default:
+				return ((Utf8String)this.buffer).equals(other);
+		}
+	}
+
+	public static boolean opEquals(UtfAnyString left, UtfAnyString right)
+	{
+		return left.equals(right.clone());
+	}
+
+	public static boolean opNotEquals(UtfAnyString left, UtfAnyString right)
+	{
+		return !left.equals(right.clone());
+	}
+
+	public static boolean opEquals(UtfAnyString left, String right)
+	{
+		return left.equals(right);
+	}
+
+	public static boolean opNotEquals(UtfAnyString left, String right)
+	{
+		return !left.equals(right);
+	}
+
+	public static boolean opEquals(String left, UtfAnyString right)
+	{
+		return right.equals(left);
+	}
+
+	public static boolean opNotEquals(String left, UtfAnyString right)
+	{
+		return !right.equals(left);
+	}
+
+	public static boolean opEquals(UtfAnyString left, Utf8String right)
+	{
+		return left.equals(right);
+	}
+
+	public static boolean opNotEquals(UtfAnyString left, Utf8String right)
+	{
+		return !left.equals(right);
+	}
+
+	public static boolean opEquals(Utf8String left, UtfAnyString right)
+	{
+		return right.equals(left);
+	}
+
+	public static boolean opNotEquals(Utf8String left, UtfAnyString right)
+	{
+		return !right.equals(left);
+	}
+
+	public static boolean opEquals(UtfAnyString left, Utf8Span right)
+	{
+		return left.equals(right);
+	}
+
+	public static boolean opNotEquals(UtfAnyString left, Utf8Span right)
+	{
+		return !left.equals(right);
+	}
+
+	public static boolean opEquals(Utf8Span left, UtfAnyString right)
+	{
+		return right.equals(left);
+	}
+
+	public static boolean opNotEquals(Utf8Span left, UtfAnyString right)
+	{
+		return !right.equals(left);
+	}
+
+	@Override
+	public int hashCode()
+	{
+//C# TO JAVA CONVERTER WARNING: Unsigned integer types have no direct equivalent in Java:
+//ORIGINAL LINE: uint hash1 = 5381;
+		int hash1 = 5381;
+//C# TO JAVA CONVERTER WARNING: Unsigned integer types have no direct equivalent in Java:
+//ORIGINAL LINE: uint hash2 = hash1;
+		int hash2 = hash1;
+
+		if (null == this.buffer)
+		{
+//C# TO JAVA CONVERTER TODO TASK: There is no Java equivalent to 'unchecked' in this context:
+//ORIGINAL LINE: return unchecked((int)(hash1 + (hash2 * 1566083941)));
+			return (int)(hash1 + (hash2 * 1566083941));
+		}
+
+		switch (this.buffer)
+		{
+//C# TO JAVA CONVERTER TODO TASK: Java has no equivalent to C# pattern variables in 'case' statements:
+//ORIGINAL LINE: case string s:
+			case String s:
+//C# TO JAVA CONVERTER TODO TASK: There is no equivalent to an 'unchecked' block in Java:
+				unchecked
+				{
+					Utf16LittleEndianCodePointEnumerator thisEnumerator = new Utf16LittleEndianCodePointEnumerator(s);
+					for (int i = 0; thisEnumerator.MoveNext(); i++)
+					{
+//C# TO JAVA CONVERTER WARNING: Unsigned integer types have no direct equivalent in Java:
+//ORIGINAL LINE: uint c = thisEnumerator.Current;
+						int c = thisEnumerator.Current;
+						if (i % 2 == 0)
+						{
+							hash1 = ((hash1 << 5) + hash1) ^ c;
+						}
+						else
+						{
+							hash2 = ((hash2 << 5) + hash2) ^ c;
+						}
+					}
+
+					return (int)(hash1 + (hash2 * 1566083941));
+				}
+
+			default:
+				return this.buffer.hashCode();
+		}
+	}
+
+	public static boolean opLessThan(UtfAnyString left, UtfAnyString right)
+	{
+		return left.CompareTo(right.clone()) < 0;
+	}
+
+	public static boolean opLessThanOrEquals(UtfAnyString left, UtfAnyString right)
+	{
+		return left.CompareTo(right.clone()) <= 0;
+	}
+
+	public static boolean opGreaterThan(UtfAnyString left, UtfAnyString right)
+	{
+		return left.CompareTo(right.clone()) > 0;
+	}
+
+	public static boolean opGreaterThanOrEquals(UtfAnyString left, UtfAnyString right)
+	{
+		return left.CompareTo(right.clone()) >= 0;
+	}
+
+	public static boolean opLessThan(UtfAnyString left, String right)
+	{
+		return left.CompareTo(right) < 0;
+	}
+
+	public static boolean opLessThanOrEquals(UtfAnyString left, String right)
+	{
+		return left.CompareTo(right) <= 0;
+	}
+
+	public static boolean opGreaterThan(UtfAnyString left, String right)
+	{
+		return left.CompareTo(right) > 0;
+	}
+
+	public static boolean opGreaterThanOrEquals(UtfAnyString left, String right)
+	{
+		return left.CompareTo(right) >= 0;
+	}
+
+	public static boolean opLessThan(String left, UtfAnyString right)
+	{
+		return right.CompareTo(left) >= 0;
+	}
+
+	public static boolean opLessThanOrEquals(String left, UtfAnyString right)
+	{
+		return right.CompareTo(left) > 0;
+	}
+
+	public static boolean opGreaterThan(String left, UtfAnyString right)
+	{
+		return right.CompareTo(left) <= 0;
+	}
+
+	public static boolean opGreaterThanOrEquals(String left, UtfAnyString right)
+	{
+		return right.CompareTo(left) < 0;
+	}
+
+	public static boolean opLessThan(UtfAnyString left, Utf8String right)
+	{
+		return left.CompareTo(right) < 0;
+	}
+
+	public static boolean opLessThanOrEquals(UtfAnyString left, Utf8String right)
+	{
+		return left.CompareTo(right) <= 0;
+	}
+
+	public static boolean opGreaterThan(UtfAnyString left, Utf8String right)
+	{
+		return left.CompareTo(right) > 0;
+	}
+
+	public static boolean opGreaterThanOrEquals(UtfAnyString left, Utf8String right)
+	{
+		return left.CompareTo(right) >= 0;
+	}
+
+	public static boolean opLessThan(Utf8String left, UtfAnyString right)
+	{
+		return right.CompareTo(left) >= 0;
+	}
+
+	public static boolean opLessThanOrEquals(Utf8String left, UtfAnyString right)
+	{
+		return right.CompareTo(left) > 0;
+	}
+
+	public static boolean opGreaterThan(Utf8String left, UtfAnyString right)
+	{
+		return right.CompareTo(left) <= 0;
+	}
+
+	public static boolean opGreaterThanOrEquals(Utf8String left, UtfAnyString right)
+	{
+		return right.CompareTo(left) < 0;
+	}
+
+	public static boolean opLessThan(UtfAnyString left, Utf8Span right)
+	{
+		return left.CompareTo(right) < 0;
+	}
+
+	public static boolean opLessThanOrEquals(UtfAnyString left, Utf8Span right)
+	{
+		return left.CompareTo(right) <= 0;
+	}
+
+	public static boolean opGreaterThan(UtfAnyString left, Utf8Span right)
+	{
+		return left.CompareTo(right) > 0;
+	}
+
+	public static boolean opGreaterThanOrEquals(UtfAnyString left, Utf8Span right)
+	{
+		return left.CompareTo(right) >= 0;
+	}
+
+	public static boolean opLessThan(Utf8Span left, UtfAnyString right)
+	{
+		return right.CompareTo(left) >= 0;
+	}
+
+	public static boolean opLessThanOrEquals(Utf8Span left, UtfAnyString right)
+	{
+		return right.CompareTo(left) > 0;
+	}
+
+	public static boolean opGreaterThan(Utf8Span left, UtfAnyString right)
+	{
+		return right.CompareTo(left) <= 0;
+	}
+
+	public static boolean opGreaterThanOrEquals(Utf8Span left, UtfAnyString right)
+	{
+		return right.CompareTo(left) < 0;
+	}
+
+	public int CompareTo(UtfAnyString other)
+	{
+		if (null == other.buffer)
+		{
+			return null == this.buffer ? 0 : 1;
+		}
+
+		switch (other.buffer)
+		{
+//C# TO JAVA CONVERTER TODO TASK: Java has no equivalent to C# pattern variables in 'case' statements:
+//ORIGINAL LINE: case string s:
+			case String s:
+				return this.CompareTo(s);
+			default:
+				return this.CompareTo((Utf8String)other.buffer);
+		}
+	}
+
+	public int CompareTo(Utf8String other)
+	{
+		if (null == this.buffer)
+		{
+			return null == other ? 0 : -1;
+		}
+
+		switch (this.buffer)
+		{
+//C# TO JAVA CONVERTER TODO TASK: Java has no equivalent to C# pattern variables in 'case' statements:
+//ORIGINAL LINE: case string s:
+			case String s:
+				return -other.getSpan().CompareTo(s);
+			default:
+				return -other.getSpan().CompareTo((Utf8String)this.buffer);
+		}
+	}
+
+	public int CompareTo(Utf8Span other)
+	{
+		if (null == this.buffer)
+		{
+			return -1;
+		}
+
+		switch (this.buffer)
+		{
+//C# TO JAVA CONVERTER TODO TASK: Java has no equivalent to C# pattern variables in 'case' statements:
+//ORIGINAL LINE: case string s:
+			case String s:
+				return -other.CompareTo(s);
+			default:
+				return -other.CompareTo((Utf8String)this.buffer);
+		}
+	}
+
+	public int CompareTo(String other)
+	{
+		if (null == this.buffer)
+		{
+			return null == other ? 0 : -1;
+		}
+
+		switch (this.buffer)
+		{
+//C# TO JAVA CONVERTER TODO TASK: Java has no equivalent to C# pattern variables in 'case' statements:
+//ORIGINAL LINE: case string s:
+			case String s:
+				return String.Compare(s, other, StringComparison.Ordinal);
+			default:
+				return ((Utf8String)this.buffer).compareTo(other);
+		}
+	}
+
+	public UtfAnyString clone()
+	{
+		UtfAnyString varCopy = new UtfAnyString();
+
+		varCopy.buffer = this.buffer;
+
+		return varCopy;
+	}
+}
\ No newline at end of file