| using System; |
| |
| namespace Lucene.Net.Analysis.TokenAttributes |
| { |
| /* |
| * 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 Attribute = Lucene.Net.Util.Attribute; |
| using IAttribute = Lucene.Net.Util.IAttribute; |
| |
| /// <summary> |
| /// Default implementation of <see cref="IOffsetAttribute"/>. </summary> |
| public class OffsetAttribute : Attribute, IOffsetAttribute |
| #if FEATURE_CLONEABLE |
| , System.ICloneable |
| #endif |
| { |
| private int startOffset; |
| private int endOffset; |
| |
| /// <summary> |
| /// Initialize this attribute with startOffset and endOffset of 0. </summary> |
| public OffsetAttribute() |
| { |
| } |
| |
| public virtual int StartOffset => startOffset; |
| |
| public virtual void SetOffset(int startOffset, int endOffset) |
| { |
| // TODO: we could assert that this is set-once, ie, |
| // current values are -1? Very few token filters should |
| // change offsets once set by the tokenizer... and |
| // tokenizer should call clearAtts before re-using |
| // OffsetAtt |
| |
| if (startOffset < 0 || endOffset < startOffset) |
| { |
| throw new ArgumentException("startOffset must be non-negative, and endOffset must be >= startOffset, " + "startOffset=" + startOffset + ",endOffset=" + endOffset); |
| } |
| |
| this.startOffset = startOffset; |
| this.endOffset = endOffset; |
| } |
| |
| public virtual int EndOffset => endOffset; |
| |
| public override void Clear() |
| { |
| // TODO: we could use -1 as default here? Then we can |
| // assert in setOffset... |
| startOffset = 0; |
| endOffset = 0; |
| } |
| |
| public override bool Equals(object other) |
| { |
| if (other == this) |
| { |
| return true; |
| } |
| |
| if (other is OffsetAttribute o) |
| { |
| 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(IAttribute target) |
| { |
| OffsetAttribute t = (OffsetAttribute)target; |
| t.SetOffset(startOffset, endOffset); |
| } |
| } |
| } |