[Note that as of 2.1, all but one of the
methods in this class are available via {@link
IndexWriter}. The one method that is not available is
{@link #DeleteDocument(int)}.]
A class to modify an index, i.e. to delete and add documents. This
class hides {@link IndexReader} and {@link IndexWriter} so that you
do not need to care about implementation details such as that adding
documents is done via IndexWriter and deletion is done via IndexReader.
Note that you cannot create more than one 
CopyC# object
on the same directory at the same time.
Example usage:
Not all methods of IndexReader and IndexWriter are offered by this
class. If you need access to additional methods, either use those classes
directly or implement your own class that extends CopyC#.
Although an instance of this class can be used from more than one
thread, you will not get the best performance. You might want to use
IndexReader and IndexWriter directly for that (but you will need to
care about synchronization yourself then).
While you can freely mix calls to add() and delete() using this class,
you should batch you calls for best performance. For example, if you
want to update 20 documents, you should first delete all those documents,
then add all the new documents.
Namespace: Lucene.Net.IndexCopyC#IndexModifier
CopyC#<font color="#ffffff"> </font><font color="#000000">Analyzer analyzer = </font><font color="#7f0055"><b>new </b></font><font color="#000000">StandardAnalyzer</font><font color="#000000">()</font><font color="#000000">;</font><br /><font color="#ffffff"> </font><font color="#3f7f5f">// create an index in /tmp/index, overwriting an existing one:</font><br /><font color="#ffffff"> </font><font color="#000000">IndexModifier indexModifier = </font><font color="#7f0055"><b>new </b></font><font color="#000000">IndexModifier</font><font color="#000000">(</font><font color="#2a00ff">"/tmp/index"</font><font color="#000000">, analyzer, </font><font color="#7f0055"><b>true</b></font><font color="#000000">)</font><font color="#000000">;</font><br /><font color="#ffffff"> </font><font color="#000000">Document doc = </font><font color="#7f0055"><b>new </b></font><font color="#000000">Document</font><font color="#000000">()</font><font color="#000000">;</font><br /><font color="#ffffff"> </font><font color="#000000">doc.add</font><font color="#000000">(</font><font color="#7f0055"><b>new </b></font><font color="#000000">Field</font><font color="#000000">(</font><font color="#2a00ff">"id"</font><font color="#000000">, </font><font color="#2a00ff">"1"</font><font color="#000000">, Field.Store.YES, Field.Index.NOT_ANALYZED</font><font color="#000000">))</font><font color="#000000">;</font><br /><font color="#ffffff"> </font><font color="#000000">doc.add</font><font color="#000000">(</font><font color="#7f0055"><b>new </b></font><font color="#000000">Field</font><font color="#000000">(</font><font color="#2a00ff">"body"</font><font color="#000000">, </font><font color="#2a00ff">"a simple test"</font><font color="#000000">, Field.Store.YES, Field.Index.ANALYZED</font><font color="#000000">))</font><font color="#000000">;</font><br /><font color="#ffffff"> </font><font color="#000000">indexModifier.addDocument</font><font color="#000000">(</font><font color="#000000">doc</font><font color="#000000">)</font><font color="#000000">;</font><br /><font color="#ffffff"> </font><font color="#7f0055"><b>int </b></font><font color="#000000">deleted = indexModifier.delete</font><font color="#000000">(</font><font color="#7f0055"><b>new </b></font><font color="#000000">Term</font><font color="#000000">(</font><font color="#2a00ff">"id"</font><font color="#000000">, </font><font color="#2a00ff">"1"</font><font color="#000000">))</font><font color="#000000">;</font><br /><font color="#ffffff"> </font><font color="#000000">System.out.println</font><font color="#000000">(</font><font color="#2a00ff">"Deleted " </font><font color="#000000">+ deleted + </font><font color="#2a00ff">" document"</font><font color="#000000">)</font><font color="#000000">;</font><br /><font color="#ffffff"> </font><font color="#000000">indexModifier.flush</font><font color="#000000">()</font><font color="#000000">;</font><br /><font color="#ffffff"> </font><font color="#000000">System.out.println</font><font color="#000000">(</font><font color="#000000">indexModifier.docCount</font><font color="#000000">() </font><font color="#000000">+ </font><font color="#2a00ff">" docs in index"</font><font color="#000000">)</font><font color="#000000">;</font><br /><font color="#ffffff"> </font><font color="#000000">indexModifier.close</font><font color="#000000">()</font><font color="#000000">;</font> |
CopyC#IndexModifier
Assembly: Lucene.Net (in Lucene.Net.dll) Version: 2.9.4.1
Syntax
| C# |
|---|
[ObsoleteAttribute("Please use IndexWriter instead.")] public class IndexModifier |
| Visual Basic |
|---|
<ObsoleteAttribute("Please use IndexWriter instead.")> _ Public Class IndexModifier |
| Visual C++ |
|---|
[ObsoleteAttribute(L"Please use IndexWriter instead.")] public ref class IndexModifier |
