fieldcacheimpl.cs

Lucene.Net 版本源码 测试通过

/*
 * 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 IndexReader = Lucene.Net.Index.IndexReader;
using Term = Lucene.Net.Index.Term;
using TermDocs = Lucene.Net.Index.TermDocs;
using TermEnum = Lucene.Net.Index.TermEnum;

namespace Lucene.Net.Search
{
	
	/// <summary> Expert: The default cache implementation, storing all values in memory.
	/// A WeakHashMap is used for storage.
	/// 
	/// <p>Created: May 19, 2004 4:40:36 PM
	/// 
	/// </summary>
	/// <author>   Tim Jones (Nacimiento Software)
	/// </author>
	/// <since>   lucene 1.4
	/// </since>
	/// <version>  $Id: FieldCacheImpl.java 488908 2006-12-20 03:47:09Z yonik $
	/// </version>
	class FieldCacheImpl : FieldCache
	{
        public virtual void Close(IndexReader reader)
        {
        }

		public FieldCacheImpl()
		{
			InitBlock();
		}

		public class AnonymousClassIntParser : IntParser
		{
			public virtual int ParseInt(System.String value_Renamed)
			{
				return System.Int32.Parse(value_Renamed);
			}
		}

		public class AnonymousClassFloatParser : FloatParser
		{
			public virtual float ParseFloat(System.String value_Renamed)
			{
				return System.Single.Parse(value_Renamed);
			}
		}
		
		internal class AnonymousClassCache : Cache
		{
			public AnonymousClassCache(Lucene.Net.Search.FieldCacheImpl enclosingInstance)
			{
				InitBlock(enclosingInstance);
			}
			private void  InitBlock(Lucene.Net.Search.FieldCacheImpl enclosingInstance)
			{
				this.enclosingInstance = enclosingInstance;
			}
			private Lucene.Net.Search.FieldCacheImpl enclosingInstance;
			public Lucene.Net.Search.FieldCacheImpl Enclosing_Instance
			{
				get
				{
					return enclosingInstance;
				}
				
			}
			
			protected internal override System.Object CreateValue(IndexReader reader, System.Object entryKey)
			{
				Entry entry = (Entry) entryKey;
				System.String field = entry.field;
				IntParser parser = (IntParser) entry.custom;
				int[] retArray = new int[reader.MaxDoc()];
				TermDocs termDocs = reader.TermDocs();
				TermEnum termEnum = reader.Terms(new Term(field, ""));
				try
				{
					do 
					{
						Term term = termEnum.Term();
						if (term == null || (System.Object) term.Field() != (System.Object) field)
							break;
						int termval = parser.ParseInt(term.Text());
						termDocs.Seek(termEnum);
						while (termDocs.Next())
						{
							retArray[termDocs.Doc()] = termval;
						}
					}
					while (termEnum.Next());
				}
				finally
				{
					termDocs.Close();
					termEnum.Close();
				}
				return retArray;
			}
		}
		
		internal class AnonymousClassCache1:Cache
		{
			public AnonymousClassCache1(Lucene.Net.Search.FieldCacheImpl enclosingInstance)
			{
				InitBlock(enclosingInstance);
			}
			private void  InitBlock(Lucene.Net.Search.FieldCacheImpl enclosingInstance)
			{
				this.enclosingInstance = enclosingInstance;
			}
			private Lucene.Net.Search.FieldCacheImpl enclosingInstance;
			public Lucene.Net.Search.FieldCacheImpl Enclosing_Instance
			{
				get
				{
					return enclosingInstance;
				}
				
			}
			
			protected internal override System.Object CreateValue(IndexReader reader, System.Object entryKey)
			{
				Entry entry = (Entry) entryKey;
				System.String field = entry.field;
				FloatParser parser = (FloatParser) entry.custom;
				float[] retArray = new float[reader.MaxDoc()];
				TermDocs termDocs = reader.TermDocs();
				TermEnum termEnum = reader.Terms(new Term(field, ""));
				try
				{
					do 
					{
						Term term = termEnum.Term();
						if (term == null || (System.Object) term.Field() != (System.Object) field)
							break;
						float termval = parser.ParseFloat(term.Text());
						termDocs.Seek(termEnum);
						while (termDocs.Next())
						{
							retArray[termDocs.Doc()] = termval;
						}
					}
					while (termEnum.Next());
				}
				finally
				{
					termDocs.Close();
					termEnum.Close();
				}
				return retArray;
			}
		}
		
		internal class AnonymousClassCache2 : Cache
		{
			public AnonymousClassCache2(Lucene.Net.Search.FieldCacheImpl enclosingInstance)
			{
				InitBlock(enclosingInstance);
			}
			private void  InitBlock(Lucene.Net.Search.FieldCacheImpl enclosingInstance)
			{
				this.enclosingInstance = enclosingInstance;
			}
			private Lucene.Net.Search.FieldCacheImpl enclosingInstance;
			public Lucene.Net.Search.FieldCacheImpl Enclosing_Instance
			{
				get
				{
					return enclosingInstance;
				}
				
			}
			
			protected internal override System.Object CreateValue(IndexReader reader, System.Object fieldKey)
			{
				System.String field = String.Intern(((System.String) fieldKey));
				System.String[] retArray = new System.String[reader.MaxDoc()];
				TermDocs termDocs = reader.TermDocs();
				TermEnum termEnum = reader.Terms(new Term(field, ""));
				try
				{
					do 
					{
						Term term = termEnum.Term();
						if (term == null || (System.Object) term.Field() != (System.Object) field)
							break;
						System.String termval = term.Text();
						termDocs.Seek(termEnum);
						while (termDocs.Next())
						{
							retArray[termDocs.Doc()] = termval;
						}
					}
					while (termEnum.Next());
				}
				finally
				{
					termDocs.Close();
					termEnum.Close();
				}
				return retArray;
			}
		}
		
		internal class AnonymousClassCache3 : Cache
		{
			public AnonymousClassCache3(Lucene.Net.Search.FieldCacheImpl enclosingInstance)
			{
				InitBlock(enclosingInstance);
			}
			private void  InitBlock(Lucene.Net.Search.FieldCacheImpl enclosingInstance)
			{
				this.enclosingInstance = enclosingInstance;
			}
			private Lucene.Net.Search.FieldCacheImpl enclosingInstance;
			public Lucene.Net.Search.FieldCacheImpl Enclosing_Instance
			{
				get
				{
					return enclosingInstance;
				}
				
			}
			
			protected internal override System.Object CreateValue(IndexReader reader, System.Object fieldKey)
			{
				System.String field = String.Intern(((System.String) fieldKey));
				int[] retArray = new int[reader.MaxDoc()];
				System.String[] mterms = new System.String[reader.MaxDoc() + 1];
				TermDocs termDocs = reader.TermDocs();
				TermEnum termEnum = reader.Terms(new Term(field, ""));
				int t = 0; // current term number
				
				// an entry for documents that have no terms in this field
				// should a document with no terms be at top or bottom?
				// this puts them at the top - if it is changed, FieldDocSortedHitQueue
				// needs to change as well.
				mterms[t++] = null;
				
				try
				{
					do 
					{
						Term term = termEnum.Term();
						if (term == null || (System.Object) term.Field() != (System.Object) field)
							break;
						
						// store term text
						// we expect that there is at most one term per document
						if (t >= mterms.Length)
							throw new System.SystemException("there are more terms than " + "documents in field \"" + field + "\", but it's impossible to sort on " + "tokenized fields");
						mterms[t] = term.Text();
						
						termDocs.Seek(termEnum);
						while (termDocs.Next())
						{
							retArray[termDocs.Doc()] = t;
						}
						
						t++;
					}
					while (termEnum.Next());
				}
				finally
				{
					termDocs.Close();
					termEnum.Close();
				}
				
				if (t == 0)
				{
					// if there are no terms, make the term array
					// have a single null entry
					mterms = new System.String[1];
				}
				else if (t < mterms.Length)
				{
					// if there are less terms than documents,
					// trim off the dead array space
					System.String[] terms = new System.String[t];
					Array.Copy(mterms, 0, terms, 0, t);
					mterms = terms;
				}
				
				StringIndex value_Renamed = new StringIndex(retArray, mterms);
				return value_Renamed;
			}
		}
		
		internal class AnonymousClassCache4 : Cache
		{
			public AnonymousClassCache4(Lucene.Net.Search.FieldCacheImpl enclosingInstance)
			{
				InitBlock(enclosingInstance);
			}
			private void  InitBlock(Lucene.Net.Search.FieldCacheImpl enclosingInstance)
			{
				this.enclosingInstance = enclosingInstance;
			}
			private Lucene.Net.Search.FieldCacheImpl enclosingInstance;
			public Lucene.Net.Search.FieldCacheImpl Enclosing_Instance
			{
				get