1 files changed, 69 insertions, 0 deletions
diff --git a/src/core/Search/Payloads/MaxPayloadFunction.cs b/src/core/Search/Payloads/MaxPayloadFunction.cs
new file mode 100644
index 0000000..3c02a80
--- /dev/null
+++ b/src/core/Search/Payloads/MaxPayloadFunction.cs
@@ -0,0 +1,69 @@
+/* 
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+using System;
+
+namespace Lucene.Net.Search.Payloads
+{
+	
+	
+	/// <summary> Returns the maximum payload score seen, else 1 if there are no payloads on the doc.
+	/// <p/>
+	/// Is thread safe and completely reusable.
+	/// 
+	/// 
+	/// </summary>
+	[Serializable]
+	public class MaxPayloadFunction:PayloadFunction
+	{
+		public override float CurrentScore(int docId, System.String field, int start, int end, int numPayloadsSeen, float currentScore, float currentPayloadScore)
+		{
+            if (numPayloadsSeen == 0)
+            {
+                return currentPayloadScore;
+            }
+            else
+            {
+                return System.Math.Max(currentPayloadScore, currentScore);
+            }
+		}
+		
+		public override float DocScore(int docId, System.String field, int numPayloadsSeen, float payloadScore)
+		{
+			return numPayloadsSeen > 0?payloadScore:1;
+		}
+		
+		public override int GetHashCode()
+		{
+			int prime = 31;
+			int result = 1;
+			result = prime * result + this.GetType().GetHashCode();
+			return result;
+		}
+		
+		public  override bool Equals(System.Object obj)
+		{
+			if (this == obj)
+				return true;
+			if (obj == null)
+				return false;
+			if (GetType() != obj.GetType())
+				return false;
+			return true;
+		}
+	}
+}
+\ No newline at end of file