1 files changed, 106 insertions, 0 deletions

diff --git a/src/core/Analysis/Tokenattributes/OffsetAttribute.cs b/src/core/Analysis/Tokenattributes/OffsetAttribute.cs
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+++ b/src/core/Analysis/Tokenattributes/OffsetAttribute.cs
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+/* 
+ * 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;
+using Attribute = Lucene.Net.Util.Attribute;
+
+namespace Lucene.Net.Analysis.Tokenattributes
+{
+	
+	/// <summary> The start and end character offset of a Token. </summary>
+	[Serializable]
+	public class OffsetAttribute:Attribute, IOffsetAttribute, System.ICloneable
+	{
+		private int startOffset;
+		private int endOffset;
+
+	    /// <summary>Returns this Token's starting offset, the position of the first character
+	    /// corresponding to this token in the source text.
+	    /// Note that the difference between endOffset() and startOffset() may not be
+	    /// equal to termText.length(), as the term text may have been altered by a
+	    /// stemmer or some other filter. 
+	    /// </summary>
+	    public virtual int StartOffset
+	    {
+	        get { return startOffset; }
+	    }
+
+
+	    /// <summary>Set the starting and ending offset.
+        /// See StartOffset() and EndOffset()
+        /// </summary>
+		public virtual void  SetOffset(int startOffset, int endOffset)
+		{
+			this.startOffset = startOffset;
+			this.endOffset = endOffset;
+		}
+
+
+	    /// <summary>Returns this Token's ending offset, one greater than the position of the
+	    /// last character corresponding to this token in the source text. The length
+	    /// of the token in the source text is (endOffset - startOffset). 
+	    /// </summary>
+	    public virtual int EndOffset
+	    {
+	        get { return endOffset; }
+	    }
+
+
+	    public override void  Clear()
+		{
+			startOffset = 0;
+			endOffset = 0;
+		}
+		
+		public  override bool Equals(System.Object other)
+		{
+			if (other == this)
+			{
+				return true;
+			}
+			
+			if (other is OffsetAttribute)
+			{
+				OffsetAttribute o = (OffsetAttribute) other;
+				return o.startOffset == startOffset && o.endOffset == endOffset;
+			}
+			
+			return false;
+		}
+		
+		public override int GetHashCode()
+		{
+			int code = startOffset;
+			code = code * 31 + endOffset;
+			return code;
+		}
+		
+		public override void  CopyTo(Attribute target)
+		{
+			IOffsetAttribute t = (IOffsetAttribute) target;
+			t.SetOffset(startOffset, endOffset);
+		}
+		
+		override public System.Object Clone()
+		{
+            OffsetAttribute impl = new OffsetAttribute();
+            impl.endOffset = endOffset;
+            impl.startOffset = startOffset;
+            return impl;
+		}
+	}
+}
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