Lucene.Net 2.0 源码＋文档

NOTE: Those changes, outlined in this file, reflect changes made to Java Lucene. NOTE: All of those changes are carried over into Apache Lucene.Net as well. NOTE: See the file HISTORY.txt for changes specific to Apache Lucene.Net. Lucene Change Log $Id: CHANGES.txt 409697 2006-05-26 16:50:37Z cutting $ Release 2.0.0 2005-05-26 API Changes 1. All deprecated methods and fields have been removed, except DateField, which will still be supported for some time so Lucene can read its date fields from old indexes (Yonik Seeley & Grant Ingersoll) 2. DisjunctionSumScorer is no longer public. (Paul Elschot via Otis Gospodnetic) 3. Creating a Field with both an empty name and an empty value now throws an IllegalArgumentException (Daniel Naber) New features 1. LUCENE-496: Command line tool for modifying the field norms of an existing index; added to contrib/miscellaneous. (Chris Hostetter) 2. LUCENE-577: SweetSpotSimilarity added to contrib/miscellaneous. (Chris Hostetter) Bug fixes 1. LUCENE-330: Fix issue of FilteredQuery not working properly within BooleanQuery. (Paul Elschot via Erik Hatcher) 2. LUCENE-515: Make ConstantScoreRangeQuery and ConstantScoreQuery work with RemoteSearchable. (Philippe Laflamme via Yonik Seeley) 3. Added methods to get/set writeLockTimeout and commitLockTimeout in IndexWriter. These could be set in Lucene 1.4 using a system property. This feature had been removed without adding the corresponding getter/setter methods. (Daniel Naber) 4. LUCENE-413: Fixed ArrayIndexOutOfBoundsException exceptions when using SpanQueries. (Paul Elschot via Yonik Seeley) 5. Implemented FilterIndexReader.getVersion() and isCurrent() (Yonik Seeley) 6. LUCENE-540: Fixed a bug with IndexWriter.addIndexes(Directory[]) that sometimes caused the index order of documents to change. (Yonik Seeley) 7. LUCENE-526: Fixed a bug in FieldSortedHitQueue that caused subsequent String sorts with different locales to sort identically. (Paul Cowan via Yonik Seeley) 8. LUCENE-541: Add missing extractTerms() to DisjunctionMaxQuery (Stefan Will via Yonik Seeley) 9. LUCENE-514: Added getTermArrays() and extractTerms() to MultiPhraseQuery (Eric Jain & Yonik Seeley) 10. LUCENE-512: Fixed ClassCastException in ParallelReader.getTermFreqVectors (frederic via Yonik) 11. LUCENE-352: Fixed bug in SpanNotQuery that manifested as NullPointerException when "exclude" query was not a SpanTermQuery. (Chris Hostetter) 12. LUCENE-572: Fixed bug in SpanNotQuery hashCode, was ignoring exclude clause (Chris Hostetter) 13. LUCENE-561: Fixed some ParallelReader bugs. NullPointerException if the reader didn't know about the field yet, reader didn't keep track if it had deletions, and deleteDocument calls could circumvent synchronization on the subreaders. (Chuck Williams via Yonik Seeley) 14. LUCENE-556: Added empty extractTerms() implementation to MatchAllDocsQuery and ConstantScoreQuery in order to allow their use with a MultiSearcher. (Yonik Seeley) 15. LUCENE-546: Removed 2GB file size limitations for RAMDirectory. (Peter Royal, Michael Chan, Yonik Seeley) 16. LUCENE-485: Don't hold commit lock while removing obsolete index files. (Luc Vanlerberghe via cutting) 1.9.1 Bug fixes 1. LUCENE-511: Fix a bug in the BufferedIndexOutput optimization introduced in 1.9-final. (Shay Banon & Steven Tamm via cutting) 1.9 final Note that this realease is mostly but not 100% source compatible with the previous release of Lucene (1.4.3). In other words, you should make sure your application compiles with this version of Lucene before you replace the old Lucene JAR with the new one. Many methods have been deprecated in anticipation of release 2.0, so deprecation warnings are to be expected when upgrading from 1.4.3 to 1.9. Bug fixes 1. The fix that made IndexWriter.setMaxBufferedDocs(1) work had negative effects on indexing performance and has thus been reverted. The argument for setMaxBufferedDocs(int) must now at least be 2, otherwise an exception is thrown. (Daniel Naber) Optimizations 1. Optimized BufferedIndexOutput.writeBytes() to use System.arraycopy() in more cases, rather than copying byte-by-byte. (Lukas Zapletal via Cutting) 1.9 RC1 Requirements 1. To compile and use Lucene you now need Java 1.4 or later. Changes in runtime behavior 1. FuzzyQuery can no longer throw a TooManyClauses exception. If a FuzzyQuery expands to more than BooleanQuery.maxClauseCount terms only the BooleanQuery.maxClauseCount most similar terms go into the rewritten query and thus the exception is avoided. (Christoph) 2. Changed system property from "org.apache.lucene.lockdir" to "org.apache.lucene.lockDir", so that its casing follows the existing pattern used in other Lucene system properties. (Bernhard) 3. The terms of RangeQueries and FuzzyQueries are now converted to lowercase by default (as it has been the case for PrefixQueries and WildcardQueries before). Use setLowercaseExpandedTerms(false) to disable that behavior but note that this also affects PrefixQueries and WildcardQueries. (Daniel Naber) 4. Document frequency that is computed when MultiSearcher is used is now computed correctly and "globally" across subsearchers and indices, while before it used to be computed locally to each index, which caused ranking across multiple indices not to be equivalent. (Chuck Williams, Wolf Siberski via Otis, bug #31841) 5. When opening an IndexWriter with create=true, Lucene now only deletes its own files from the index directory (looking at the file name suffixes to decide if a file belongs to Lucene). The old behavior was to delete all files. (Daniel Naber and Bernhard Messer, bug #34695) 6. The version of an IndexReader, as returned by getCurrentVersion() and getVersion() doesn't start at 0 anymore for new indexes. Instead, it is now initialized by the system time in milliseconds. (Bernhard Messer via Daniel Naber) 7. Several default values cannot be set via system properties anymore, as this has been considered inappropriate for a library like Lucene. For most properties there are set/get methods available in IndexWriter which you should use instead. This affects the following properties: See IndexWriter for getter/setter methods: org.apache.lucene.writeLockTimeout, org.apache.lucene.commitLockTimeout, org.apache.lucene.minMergeDocs, org.apache.lucene.maxMergeDocs, org.apache.lucene.maxFieldLength, org.apache.lucene.termIndexInterval, org.apache.lucene.mergeFactor, See BooleanQuery for getter/setter methods: org.apache.lucene.maxClauseCount See FSDirectory for getter/setter methods: disableLuceneLocks (Daniel Naber) 8. Fixed FieldCacheImpl to use user-provided IntParser and FloatParser, instead of using Integer and Float classes for parsing. (Yonik Seeley via Otis Gospodnetic) 9. Expert level search routines returning TopDocs and TopFieldDocs no longer normalize scores. This also fixes bugs related to MultiSearchers and score sorting/normalization. (Luc Vanlerberghe via Yonik Seeley, LUCENE-469) New features 1. Added support for stored compressed fields (patch #31149) (Bernhard Messer via Christoph) 2. Added support for binary stored fields (patch #29370) (Drew Farris and Bernhard Messer via Christoph) 3. Added support for position and offset information in term vectors (patch #18927). (Grant Ingersoll & Christoph) 4. A new class DateTools has been added. It allows you to format dates in a r