public QueryTermVector(System.String queryString, Analyzer analyzer)
{
if (analyzer != null)
{
TokenStream stream = analyzer.TokenStream("", new System.IO.StringReader(queryString));
if (stream != null)
{
System.Collections.ArrayList terms = new System.Collections.ArrayList();
try
{
bool hasMoreTokens = false;
stream.Reset();
TermAttribute termAtt = (TermAttribute) stream.AddAttribute(typeof(TermAttribute));
hasMoreTokens = stream.IncrementToken();
while (hasMoreTokens)
{
terms.Add(termAtt.Term());
hasMoreTokens = stream.IncrementToken();
}
ProcessTerms((System.String[]) terms.ToArray(typeof(System.String)));
}
catch (System.IO.IOException e)
{
}
}
}
}
public QueryTermVector(System.String queryString, Analyzer analyzer)
{
if (analyzer != null)
{
TokenStream stream = analyzer.TokenStream("", new System.IO.StringReader(queryString));
if (stream != null)
{
System.Collections.ArrayList terms = new System.Collections.ArrayList();
try
{
bool hasMoreTokens = false;
stream.Reset();
TermAttribute termAtt = (TermAttribute)stream.AddAttribute(typeof(TermAttribute));
hasMoreTokens = stream.IncrementToken();
while (hasMoreTokens)
{
terms.Add(termAtt.Term());
hasMoreTokens = stream.IncrementToken();
}
ProcessTerms((System.String[])terms.ToArray(typeof(System.String)));
}
catch (System.IO.IOException e)
{
}
}
}
}
/// <summary> Open an index with write access.
///
/// </summary>
/// <param name="dirName">the index directory
/// </param>
/// <param name="analyzer">the analyzer to use for adding new documents
/// </param>
/// <param name="create"><code>true</code> to create the index or overwrite the existing one;
/// <code>false</code> to append to the existing index
/// </param>
/// <throws> CorruptIndexException if the index is corrupt </throws>
/// <throws> LockObtainFailedException if another writer </throws>
/// <summary> has this index open (<code>write.lock</code> could not
/// be obtained)
/// </summary>
/// <throws> IOException if there is a low-level IO error </throws>
public IndexModifier(System.String dirName, Analyzer analyzer, bool create)
{
InitBlock();
Directory dir = FSDirectory.GetDirectory(dirName);
this.closeDir = true;
Init(dir, analyzer, create);
}
/// <summary> Open an index with write access.
///
/// </summary>
/// <param name="file">the index directory
/// </param>
/// <param name="analyzer">the analyzer to use for adding new documents
/// </param>
/// <param name="create"><code>true</code> to create the index or overwrite the existing one;
/// <code>false</code> to append to the existing index
/// </param>
/// <throws> CorruptIndexException if the index is corrupt </throws>
/// <throws> LockObtainFailedException if another writer </throws>
/// <summary> has this index open (<code>write.lock</code> could not
/// be obtained)
/// </summary>
/// <throws> IOException if there is a low-level IO error </throws>
public IndexModifier(System.IO.FileInfo file, Analyzer analyzer, bool create)
{
InitBlock();
Directory dir = FSDirectory.GetDirectory(file);
this.closeDir = true;
Init(dir, analyzer, create);
}
/// <summary> Initialize an IndexWriter.</summary>
/// <throws> CorruptIndexException if the index is corrupt </throws>
/// <throws> LockObtainFailedException if another writer </throws>
/// <summary> has this index open (<code>write.lock</code> could not
/// be obtained)
/// </summary>
/// <throws> IOException if there is a low-level IO error </throws>
protected internal virtual void Init(Directory directory, Analyzer analyzer, bool create)
{
this.directory = directory;
lock (this.directory)
{
this.analyzer = analyzer;
indexWriter = new IndexWriter(directory, analyzer, create, IndexWriter.MaxFieldLength.LIMITED);
open = true;
}
}
/// <summary> Adds a document to this index, using the provided analyzer instead of the
/// one specific in the constructor. If the document contains more than
/// {@link #SetMaxFieldLength(int)} terms for a given field, the remainder are
/// discarded.
/// </summary>
/// <seealso cref="IndexWriter.AddDocument(Document, Analyzer)">
/// </seealso>
/// <throws> IllegalStateException if the index is closed </throws>
/// <throws> CorruptIndexException if the index is corrupt </throws>
/// <throws> LockObtainFailedException if another writer </throws>
/// <summary> has this index open (<code>write.lock</code> could not
/// be obtained)
/// </summary>
/// <throws> IOException if there is a low-level IO error </throws>
public virtual void AddDocument(Document doc, Analyzer docAnalyzer)
{
lock (directory)
{
AssureOpen();
CreateIndexWriter();
if (docAnalyzer != null)
{
indexWriter.AddDocument(doc, docAnalyzer);
}
else
{
indexWriter.AddDocument(doc);
}
}
}
/// <summary> Creates a MultiFieldQueryParser.
///
/// <p/>
/// It will, when parse(String query) is called, construct a query like this
/// (assuming the query consists of two terms and you specify the two fields
/// <code>title</code> and <code>body</code>):
/// <p/>
///
/// <code>
/// (title:term1 body:term1) (title:term2 body:term2)
/// </code>
///
/// <p/>
/// When setDefaultOperator(AND_OPERATOR) is set, the result will be:
/// <p/>
///
/// <code>
/// +(title:term1 body:term1) +(title:term2 body:term2)
/// </code>
///
/// <p/>
/// In other words, all the query's terms must appear, but it doesn't matter
/// in what fields they appear.
/// <p/>
/// </summary>
public MultiFieldQueryParser(Version matchVersion, System.String[] fields, Analyzer analyzer) : base(matchVersion, null, analyzer)
{
this.fields = fields;
}
public static Query Parse(System.String[] queries, System.String[] fields, BooleanClause.Occur[] flags, Analyzer analyzer)
{
return(Parse(Version.LUCENE_24, queries, fields, flags, analyzer));
}
public QueryParser(System.String f, Analyzer a):this(Version.LUCENE_24, f, a)
{
}
/// <summary> Creates a MultiFieldQueryParser. Allows passing of a map with term to
/// Boost, and the boost to apply to each term.
///
/// <p/>
/// It will, when parse(String query) is called, construct a query like this
/// (assuming the query consists of two terms and you specify the two fields
/// <code>title</code> and <code>body</code>):
/// <p/>
///
/// <code>
/// (title:term1 body:term1) (title:term2 body:term2)
/// </code>
///
/// <p/>
/// When setDefaultOperator(AND_OPERATOR) is set, the result will be:
/// <p/>
///
/// <code>
/// +(title:term1 body:term1) +(title:term2 body:term2)
/// </code>
///
/// <p/>
/// When you pass a boost (title=>5 body=>10) you can get
/// <p/>
///
/// <code>
/// +(title:term1^5.0 body:term1^10.0) +(title:term2^5.0 body:term2^10.0)
/// </code>
///
/// <p/>
/// In other words, all the query's terms must appear, but it doesn't matter
/// in what fields they appear.
/// <p/>
/// </summary>
public MultiFieldQueryParser(Version matchVersion, System.String[] fields, Analyzer analyzer, System.Collections.IDictionary boosts) : this(matchVersion, fields, analyzer)
{
this.boosts = boosts;
}
/// <summary> Parses a query, searching on the fields specified. Use this if you need
/// to specify certain fields as required, and others as prohibited.
/// <p/>
///
/// <pre>
/// Usage:
/// <code>
/// String[] query = {"query1", "query2", "query3"};
/// String[] fields = {"filename", "contents", "description"};
/// BooleanClause.Occur[] flags = {BooleanClause.Occur.SHOULD,
/// BooleanClause.Occur.MUST,
/// BooleanClause.Occur.MUST_NOT};
/// MultiFieldQueryParser.parse(query, fields, flags, analyzer);
/// </code>
/// </pre>
/// <p/>
/// The code above would construct a query:
///
/// <pre>
/// <code>
/// (filename:query1) +(contents:query2) -(description:query3)
/// </code>
/// </pre>
///
/// </summary>
/// <param name="matchVersion">Lucene version to match; this is passed through to
/// QueryParser.
/// </param>
/// <param name="queries">Queries string to parse
/// </param>
/// <param name="fields">Fields to search on
/// </param>
/// <param name="flags">Flags describing the fields
/// </param>
/// <param name="analyzer">Analyzer to use
/// </param>
/// <throws> ParseException </throws>
/// <summary> if query parsing fails
/// </summary>
/// <throws> IllegalArgumentException </throws>
/// <summary> if the length of the queries, fields, and flags array differ
/// </summary>
public static Query Parse(Version matchVersion, System.String[] queries, System.String[] fields, BooleanClause.Occur[] flags, Analyzer analyzer)
{
if (!(queries.Length == fields.Length && queries.Length == flags.Length))
throw new System.ArgumentException("queries, fields, and flags array have have different length");
BooleanQuery bQuery = new BooleanQuery();
for (int i = 0; i < fields.Length; i++)
{
QueryParser qp = new QueryParser(matchVersion, fields[i], analyzer);
Query q = qp.Parse(queries[i]);
if (q != null && (!(q is BooleanQuery) || ((BooleanQuery) q).GetClauses().Length > 0))
{
bQuery.Add(q, flags[i]);
}
}
return bQuery;
}
public IndexWriter(System.IO.FileInfo path, Analyzer a, MaxFieldLength mfl)
{
InitBlock();
Init(FSDirectory.GetDirectory(path), a, true, null, false, mfl.GetLimit(), null, null);
}
private void Init(Directory d, Analyzer a, bool closeDir, IndexDeletionPolicy deletionPolicy, bool autoCommit, int maxFieldLength, IndexingChain indexingChain, IndexCommit commit)
{
if (IndexReader.IndexExists(d))
{
Init(d, a, false, closeDir, deletionPolicy, autoCommit, maxFieldLength, indexingChain, commit);
}
else
{
Init(d, a, true, closeDir, deletionPolicy, autoCommit, maxFieldLength, indexingChain, commit);
}
}
public IndexWriter(Directory d, Analyzer a)
{
InitBlock();
Init(d, a, false, null, true, DEFAULT_MAX_FIELD_LENGTH, null, null);
}
public IndexWriter(Directory d, bool autoCommit, Analyzer a, bool create, IndexDeletionPolicy deletionPolicy)
{
InitBlock();
Init(d, a, create, false, deletionPolicy, autoCommit, DEFAULT_MAX_FIELD_LENGTH, null, null);
}
/// <summary> Expert: constructs an IndexWriter on specific commit
/// point, with a custom {@link IndexDeletionPolicy}, for
/// the index in <code>d</code>. Text will be analyzed
/// with <code>a</code>.
///
/// <p/> This is only meaningful if you've used a {@link
/// IndexDeletionPolicy} in that past that keeps more than
/// just the last commit.
///
/// <p/>This operation is similar to {@link #Rollback()},
/// except that method can only rollback what's been done
/// with the current instance of IndexWriter since its last
/// commit, whereas this method can rollback to an
/// arbitrary commit point from the past, assuming the
/// {@link IndexDeletionPolicy} has preserved past
/// commits.
///
/// <p/><b>NOTE</b>: autoCommit (see <a
/// href="#autoCommit">above</a>) is set to false with this
/// constructor.
///
/// </summary>
/// <param name="d">the index directory
/// </param>
/// <param name="a">the analyzer to use
/// </param>
/// <param name="deletionPolicy">see <a href="#deletionPolicy">above</a>
/// </param>
/// <param name="mfl">whether or not to limit field lengths, value is in number of terms/tokens. See {@link Mono.Lucene.Net.Index.IndexWriter.MaxFieldLength}.
/// </param>
/// <param name="commit">which commit to open
/// </param>
/// <throws> CorruptIndexException if the index is corrupt </throws>
/// <throws> LockObtainFailedException if another writer </throws>
/// <summary> has this index open (<code>write.lock</code> could not
/// be obtained)
/// </summary>
/// <throws> IOException if the directory cannot be read/written to, or </throws>
/// <summary> if it does not exist and <code>create</code> is
/// <code>false</code> or if there is any other low-level
/// IO error
/// </summary>
public IndexWriter(Directory d, Analyzer a, IndexDeletionPolicy deletionPolicy, MaxFieldLength mfl, IndexCommit commit)
{
InitBlock();
Init(d, a, false, false, deletionPolicy, false, mfl.GetLimit(), null, commit);
}
/// <summary> Expert: constructs an IndexWriter with a custom {@link
/// IndexDeletionPolicy} and {@link IndexingChain},
/// for the index in <code>d</code>.
/// Text will be analyzed with <code>a</code>. If
/// <code>create</code> is true, then a new, empty index
/// will be created in <code>d</code>, replacing the index
/// already there, if any.
///
/// <p/><b>NOTE</b>: autoCommit (see <a
/// href="#autoCommit">above</a>) is set to false with this
/// constructor.
///
/// </summary>
/// <param name="d">the index directory
/// </param>
/// <param name="a">the analyzer to use
/// </param>
/// <param name="create"><code>true</code> to create the index or overwrite
/// the existing one; <code>false</code> to append to the existing
/// index
/// </param>
/// <param name="deletionPolicy">see <a href="#deletionPolicy">above</a>
/// </param>
/// <param name="mfl">whether or not to limit field lengths, value is in number of terms/tokens. See {@link Mono.Lucene.Net.Index.IndexWriter.MaxFieldLength}.
/// </param>
/// <param name="indexingChain">the {@link DocConsumer} chain to be used to
/// process documents
/// </param>
/// <param name="commit">which commit to open
/// </param>
/// <throws> CorruptIndexException if the index is corrupt </throws>
/// <throws> LockObtainFailedException if another writer </throws>
/// <summary> has this index open (<code>write.lock</code> could not
/// be obtained)
/// </summary>
/// <throws> IOException if the directory cannot be read/written to, or </throws>
/// <summary> if it does not exist and <code>create</code> is
/// <code>false</code> or if there is any other low-level
/// IO error
/// </summary>
internal IndexWriter(Directory d, Analyzer a, bool create, IndexDeletionPolicy deletionPolicy, MaxFieldLength mfl, IndexingChain indexingChain, IndexCommit commit)
{
InitBlock();
Init(d, a, create, false, deletionPolicy, false, mfl.GetLimit(), indexingChain, commit);
}
/// <summary> Expert: constructs an IndexWriter with a custom {@link
/// IndexDeletionPolicy}, for the index in <code>d</code>.
/// Text will be analyzed with <code>a</code>. If
/// <code>create</code> is true, then a new, empty index
/// will be created in <code>d</code>, replacing the index
/// already there, if any.
///
/// <p/><b>NOTE</b>: autoCommit (see <a
/// href="#autoCommit">above</a>) is set to false with this
/// constructor.
///
/// </summary>
/// <param name="d">the index directory
/// </param>
/// <param name="a">the analyzer to use
/// </param>
/// <param name="create"><code>true</code> to create the index or overwrite
/// the existing one; <code>false</code> to append to the existing
/// index
/// </param>
/// <param name="deletionPolicy">see <a href="#deletionPolicy">above</a>
/// </param>
/// <param name="mfl">{@link Mono.Lucene.Net.Index.IndexWriter.MaxFieldLength}, whether or not to limit field lengths. Value is in number of terms/tokens
/// </param>
/// <throws> CorruptIndexException if the index is corrupt </throws>
/// <throws> LockObtainFailedException if another writer </throws>
/// <summary> has this index open (<code>write.lock</code> could not
/// be obtained)
/// </summary>
/// <throws> IOException if the directory cannot be read/written to, or </throws>
/// <summary> if it does not exist and <code>create</code> is
/// <code>false</code> or if there is any other low-level
/// IO error
/// </summary>
public IndexWriter(Directory d, Analyzer a, bool create, IndexDeletionPolicy deletionPolicy, MaxFieldLength mfl)
{
InitBlock();
Init(d, a, create, false, deletionPolicy, false, mfl.GetLimit(), null, null);
}
public IndexWriter(Directory d, bool autoCommit, Analyzer a)
{
InitBlock();
Init(d, a, false, null, autoCommit, DEFAULT_MAX_FIELD_LENGTH, null, null);
}
public MultiFieldQueryParser(System.String[] fields, Analyzer analyzer, System.Collections.IDictionary boosts) : this(Version.LUCENE_24, fields, analyzer)
{
this.boosts = boosts;
}
private void Init(Directory d, Analyzer a, bool create, bool closeDir, IndexDeletionPolicy deletionPolicy, bool autoCommit, int maxFieldLength, IndexingChain indexingChain, IndexCommit commit)
{
this.closeDir = closeDir;
directory = d;
analyzer = a;
SetMessageID(defaultInfoStream);
this.maxFieldLength = maxFieldLength;
if (indexingChain == null)
indexingChain = DocumentsWriter.DefaultIndexingChain;
if (create)
{
// Clear the write lock in case it's leftover:
directory.ClearLock(WRITE_LOCK_NAME);
}
Lock writeLock = directory.MakeLock(WRITE_LOCK_NAME);
if (!writeLock.Obtain(writeLockTimeout))
// obtain write lock
{
throw new LockObtainFailedException("Index locked for write: " + writeLock);
}
this.writeLock = writeLock; // save it
bool success = false;
try
{
if (create)
{
// Try to read first. This is to allow create
// against an index that's currently open for
// searching. In this case we write the next
// segments_N file with no segments:
bool doCommit;
try
{
segmentInfos.Read(directory);
segmentInfos.Clear();
doCommit = false;
}
catch (System.IO.IOException e)
{
// Likely this means it's a fresh directory
doCommit = true;
}
if (autoCommit || doCommit)
{
// Always commit if autoCommit=true, else only
// commit if there is no segments file in this dir
// already.
segmentInfos.Commit(directory);
SupportClass.CollectionsHelper.AddAllIfNotContains(synced, segmentInfos.Files(directory, true));
}
else
{
// Record that we have a change (zero out all
// segments) pending:
changeCount++;
}
}
else
{
segmentInfos.Read(directory);
if (commit != null)
{
// Swap out all segments, but, keep metadata in
// SegmentInfos, like version & generation, to
// preserve write-once. This is important if
// readers are open against the future commit
// points.
if (commit.GetDirectory() != directory)
throw new System.ArgumentException("IndexCommit's directory doesn't match my directory");
SegmentInfos oldInfos = new SegmentInfos();
oldInfos.Read(directory, commit.GetSegmentsFileName());
segmentInfos.Replace(oldInfos);
changeCount++;
if (infoStream != null)
Message("init: loaded commit \"" + commit.GetSegmentsFileName() + "\"");
}
// We assume that this segments_N was previously
// properly sync'd:
SupportClass.CollectionsHelper.AddAllIfNotContains(synced, segmentInfos.Files(directory, true));
}
this.autoCommit = autoCommit;
SetRollbackSegmentInfos(segmentInfos);
docWriter = new DocumentsWriter(directory, this, indexingChain);
docWriter.SetInfoStream(infoStream);
docWriter.SetMaxFieldLength(maxFieldLength);
// Default deleter (for backwards compatibility) is
// KeepOnlyLastCommitDeleter:
deleter = new IndexFileDeleter(directory, deletionPolicy == null?new KeepOnlyLastCommitDeletionPolicy():deletionPolicy, segmentInfos, infoStream, docWriter,synced);
if (deleter.startingCommitDeleted)
// Deletion policy deleted the "head" commit point.
// We have to mark ourself as changed so that if we
// are closed w/o any further changes we write a new
// segments_N file.
changeCount++;
PushMaxBufferedDocs();
if (infoStream != null)
{
Message("init: create=" + create);
MessageState();
}
success = true;
}
finally
{
if (!success)
{
if (infoStream != null)
{
Message("init: hit exception on init; releasing write lock");
}
try
{
writeLock.Release();
}
catch (Exception t)
{
// don't mask the original exception
}
writeLock = null;
}
}
}
public IndexWriter(System.String path, Analyzer a, bool create, MaxFieldLength mfl)
{
InitBlock();
Init(FSDirectory.GetDirectory(path), a, create, true, null, false, mfl.GetLimit(), null, null);
}
/// <summary> Updates a document by first deleting the document(s)
/// containing <code>term</code> and then adding the new
/// document. The delete and then add are atomic as seen
/// by a reader on the same index (flush may happen only after
/// the add).
///
/// <p/><b>NOTE</b>: if this method hits an OutOfMemoryError
/// you should immediately close the writer. See <a
/// href="#OOME">above</a> for details.<p/>
///
/// </summary>
/// <param name="term">the term to identify the document(s) to be
/// deleted
/// </param>
/// <param name="doc">the document to be added
/// </param>
/// <param name="analyzer">the analyzer to use when analyzing the document
/// </param>
/// <throws> CorruptIndexException if the index is corrupt </throws>
/// <throws> IOException if there is a low-level IO error </throws>
public virtual void UpdateDocument(Term term, Document doc, Analyzer analyzer)
{
EnsureOpen();
try
{
bool doFlush = false;
bool success = false;
try
{
doFlush = docWriter.UpdateDocument(term, doc, analyzer);
success = true;
}
finally
{
if (!success)
{
if (infoStream != null)
Message("hit exception updating document");
lock (this)
{
// If docWriter has some aborted files that were
// never incref'd, then we clean them up here
System.Collections.Generic.ICollection<string> files = docWriter.AbortedFiles();
if (files != null)
deleter.DeleteNewFiles(files);
}
}
}
if (doFlush)
Flush(true, false, false);
}
catch (System.OutOfMemoryException oom)
{
HandleOOM(oom, "updateDocument");
}
}
public static Query Parse(System.String[] queries, System.String[] fields, BooleanClause.Occur[] flags, Analyzer analyzer)
{
return Parse(Version.LUCENE_24, queries, fields, flags, analyzer);
}
/// <summary>Returns true if the caller (IndexWriter) should now
/// flush.
/// </summary>
internal bool AddDocument(Document doc, Analyzer analyzer)
{
return UpdateDocument(doc, analyzer, null);
}
public MultiFieldQueryParser(System.String[] fields, Analyzer analyzer, System.Collections.IDictionary boosts):this(Version.LUCENE_24, fields, analyzer)
{
this.boosts = boosts;
}
internal bool UpdateDocument(Term t, Document doc, Analyzer analyzer)
{
return UpdateDocument(doc, analyzer, t);
}
public IndexWriter(System.String path, Analyzer a, bool create)
{
InitBlock();
Init(FSDirectory.GetDirectory(path), a, create, true, null, true, DEFAULT_MAX_FIELD_LENGTH, null, null);
}
internal bool UpdateDocument(Document doc, Analyzer analyzer, Term delTerm)
{
// This call is synchronized but fast
DocumentsWriterThreadState state = GetThreadState(doc, delTerm);
DocState docState = state.docState;
docState.doc = doc;
docState.analyzer = analyzer;
bool doReturnFalse = false; // {{Aroush-2.9}} to handle return from finally clause
bool success = false;
try
{
// This call is not synchronized and does all the
// work
DocWriter perDoc;
try
{
perDoc = state.consumer.ProcessDocument();
}
finally
{
docState.Clear();
}
// This call is synchronized but fast
FinishDocument(state, perDoc);
success = true;
}
finally
{
if (!success)
{
lock (this)
{
if (aborting)
{
state.isIdle = true;
System.Threading.Monitor.PulseAll(this);
Abort();
}
else
{
skipDocWriter.docID = docState.docID;
bool success2 = false;
try
{
waitQueue.Add(skipDocWriter);
success2 = true;
}
finally
{
if (!success2)
{
state.isIdle = true;
System.Threading.Monitor.PulseAll(this);
Abort();
// return false; // {{Aroush-2.9}} this 'return false' is move to outside finally
doReturnFalse = true;
}
}
if (!doReturnFalse) // {{Aroush-2.9}} added because of the above 'return false' removal
{
state.isIdle = true;
System.Threading.Monitor.PulseAll(this);
// If this thread state had decided to flush, we
// must clear it so another thread can flush
if (state.doFlushAfter)
{
state.doFlushAfter = false;
flushPending = false;
System.Threading.Monitor.PulseAll(this);
}
// Immediately mark this document as deleted
// since likely it was partially added. This
// keeps indexing as "all or none" (atomic) when
// adding a document:
AddDeleteDocID(state.docState.docID);
}
}
}
}
}
if (doReturnFalse) // {{Aroush-2.9}} see comment abouve
{
return false;
}
return state.doFlushAfter || TimeToFlushDeletes();
}
/// <summary> Constructs a query parser.
///
/// </summary>
/// <param name="matchVersion">Lucene version to match. See <a href="#version">above</a>)
/// </param>
/// <param name="f">the default field for query terms.
/// </param>
/// <param name="a">used to find terms in the query text.
/// </param>
public QueryParser(Version matchVersion, System.String f, Analyzer a):this(new FastCharStream(new System.IO.StringReader("")))
{
analyzer = a;
field = f;
if (matchVersion.OnOrAfter(Version.LUCENE_29))
{
enablePositionIncrements = true;
}
else
{
enablePositionIncrements = false;
}
}
public void Clear()
{
// don't hold onto doc nor analyzer, in case it is
// largish:
doc = null;
analyzer = null;
}
public MultiFieldQueryParser(System.String[] fields, Analyzer analyzer) : this(Version.LUCENE_24, fields, analyzer)
{
}
public IndexWriter(System.IO.FileInfo path, Analyzer a)
{
InitBlock();
Init(FSDirectory.GetDirectory(path), a, true, null, true, DEFAULT_MAX_FIELD_LENGTH, null, null);
}
public static Query Parse(System.String[] queries, System.String[] fields, Analyzer analyzer)
{
return(Parse(Version.LUCENE_24, queries, fields, analyzer));
}
/// <summary> Adds a document to this index, using the provided analyzer instead of the
/// one specific in the constructor. If the document contains more than
/// {@link #SetMaxFieldLength(int)} terms for a given field, the remainder are
/// discarded.
/// </summary>
/// <seealso cref="IndexWriter.AddDocument(Document, Analyzer)">
/// </seealso>
/// <throws> IllegalStateException if the index is closed </throws>
/// <throws> CorruptIndexException if the index is corrupt </throws>
/// <throws> LockObtainFailedException if another writer </throws>
/// <summary> has this index open (<code>write.lock</code> could not
/// be obtained)
/// </summary>
/// <throws> IOException if there is a low-level IO error </throws>
public virtual void AddDocument(Document doc, Analyzer docAnalyzer)
{
lock (directory)
{
AssureOpen();
CreateIndexWriter();
if (docAnalyzer != null)
indexWriter.AddDocument(doc, docAnalyzer);
else
indexWriter.AddDocument(doc);
}
}
/// <summary> Parses a query, searching on the fields specified. Use this if you need
/// to specify certain fields as required, and others as prohibited.
/// <p/>
///
/// <pre>
/// Usage:
/// <code>
/// String[] query = {"query1", "query2", "query3"};
/// String[] fields = {"filename", "contents", "description"};
/// BooleanClause.Occur[] flags = {BooleanClause.Occur.SHOULD,
/// BooleanClause.Occur.MUST,
/// BooleanClause.Occur.MUST_NOT};
/// MultiFieldQueryParser.parse(query, fields, flags, analyzer);
/// </code>
/// </pre>
/// <p/>
/// The code above would construct a query:
///
/// <pre>
/// <code>
/// (filename:query1) +(contents:query2) -(description:query3)
/// </code>
/// </pre>
///
/// </summary>
/// <param name="matchVersion">Lucene version to match; this is passed through to
/// QueryParser.
/// </param>
/// <param name="queries">Queries string to parse
/// </param>
/// <param name="fields">Fields to search on
/// </param>
/// <param name="flags">Flags describing the fields
/// </param>
/// <param name="analyzer">Analyzer to use
/// </param>
/// <throws> ParseException </throws>
/// <summary> if query parsing fails
/// </summary>
/// <throws> IllegalArgumentException </throws>
/// <summary> if the length of the queries, fields, and flags array differ
/// </summary>
public static Query Parse(Version matchVersion, System.String[] queries, System.String[] fields, BooleanClause.Occur[] flags, Analyzer analyzer)
{
if (!(queries.Length == fields.Length && queries.Length == flags.Length))
{
throw new System.ArgumentException("queries, fields, and flags array have have different length");
}
BooleanQuery bQuery = new BooleanQuery();
for (int i = 0; i < fields.Length; i++)
{
QueryParser qp = new QueryParser(matchVersion, fields[i], analyzer);
Query q = qp.Parse(queries[i]);
if (q != null && (!(q is BooleanQuery) || ((BooleanQuery)q).GetClauses().Length > 0))
{
bQuery.Add(q, flags[i]);
}
}
return(bQuery);
}
/// <summary> Creates a MultiFieldQueryParser.
///
/// <p/>
/// It will, when parse(String query) is called, construct a query like this
/// (assuming the query consists of two terms and you specify the two fields
/// <code>title</code> and <code>body</code>):
/// <p/>
///
/// <code>
/// (title:term1 body:term1) (title:term2 body:term2)
/// </code>
///
/// <p/>
/// When setDefaultOperator(AND_OPERATOR) is set, the result will be:
/// <p/>
///
/// <code>
/// +(title:term1 body:term1) +(title:term2 body:term2)
/// </code>
///
/// <p/>
/// In other words, all the query's terms must appear, but it doesn't matter
/// in what fields they appear.
/// <p/>
/// </summary>
public MultiFieldQueryParser(Version matchVersion, System.String[] fields, Analyzer analyzer):base(matchVersion, null, analyzer)
{
this.fields = fields;
}
/// <summary> Open an index with write access.
///
/// </summary>
/// <param name="directory">the index directory
/// </param>
/// <param name="analyzer">the analyzer to use for adding new documents
/// </param>
/// <param name="create"><code>true</code> to create the index or overwrite the existing one;
/// <code>false</code> to append to the existing index
/// </param>
/// <throws> CorruptIndexException if the index is corrupt </throws>
/// <throws> LockObtainFailedException if another writer </throws>
/// <summary> has this index open (<code>write.lock</code> could not
/// be obtained)
/// </summary>
/// <throws> IOException if there is a low-level IO error </throws>
public IndexModifier(Directory directory, Analyzer analyzer, bool create)
{
InitBlock();
Init(directory, analyzer, create);
}
public static Query Parse(System.String[] queries, System.String[] fields, Analyzer analyzer)
{
return Parse(Version.LUCENE_24, queries, fields, analyzer);
}
/// <summary> Creates a MultiFieldQueryParser. Allows passing of a map with term to
/// Boost, and the boost to apply to each term.
///
/// <p/>
/// It will, when parse(String query) is called, construct a query like this
/// (assuming the query consists of two terms and you specify the two fields
/// <code>title</code> and <code>body</code>):
/// <p/>
///
/// <code>
/// (title:term1 body:term1) (title:term2 body:term2)
/// </code>
///
/// <p/>
/// When setDefaultOperator(AND_OPERATOR) is set, the result will be:
/// <p/>
///
/// <code>
/// +(title:term1 body:term1) +(title:term2 body:term2)
/// </code>
///
/// <p/>
/// When you pass a boost (title=>5 body=>10) you can get
/// <p/>
///
/// <code>
/// +(title:term1^5.0 body:term1^10.0) +(title:term2^5.0 body:term2^10.0)
/// </code>
///
/// <p/>
/// In other words, all the query's terms must appear, but it doesn't matter
/// in what fields they appear.
/// <p/>
/// </summary>
public MultiFieldQueryParser(Version matchVersion, System.String[] fields, Analyzer analyzer, System.Collections.IDictionary boosts):this(matchVersion, fields, analyzer)
{
this.boosts = boosts;
}
/// <summary> Constructs an IndexWriter for the index in
/// <code>d</code>, first creating it if it does not
/// already exist. Text will be analyzed with
/// <code>a</code>.
///
/// <p/><b>NOTE</b>: autoCommit (see <a
/// href="#autoCommit">above</a>) is set to false with this
/// constructor.
///
/// </summary>
/// <param name="d">the index directory
/// </param>
/// <param name="a">the analyzer to use
/// </param>
/// <param name="mfl">Maximum field length in number of terms/tokens: LIMITED, UNLIMITED, or user-specified
/// via the MaxFieldLength constructor.
/// </param>
/// <throws> CorruptIndexException if the index is corrupt </throws>
/// <throws> LockObtainFailedException if another writer </throws>
/// <summary> has this index open (<code>write.lock</code> could not
/// be obtained)
/// </summary>
/// <throws> IOException if the directory cannot be </throws>
/// <summary> read/written to or if there is any other low-level
/// IO error
/// </summary>
public IndexWriter(Directory d, Analyzer a, MaxFieldLength mfl)
{
InitBlock();
Init(d, a, false, null, false, mfl.GetLimit(), null, null);
}
public MultiFieldQueryParser(System.String[] fields, Analyzer analyzer):this(Version.LUCENE_24, fields, analyzer)
{
}
/// <summary> Initialize an IndexWriter.</summary>
/// <throws> CorruptIndexException if the index is corrupt </throws>
/// <throws> LockObtainFailedException if another writer </throws>
/// <summary> has this index open (<code>write.lock</code> could not
/// be obtained)
/// </summary>
/// <throws> IOException if there is a low-level IO error </throws>
protected internal virtual void Init(Directory directory, Analyzer analyzer, bool create)
{
this.directory = directory;
lock (this.directory)
{
this.analyzer = analyzer;
indexWriter = new IndexWriter(directory, analyzer, create, IndexWriter.MaxFieldLength.LIMITED);
open = true;
}
}
