Package com.logicaldoc.core.searchengine

Class StandardSearchEngine

java.lang.Object

com.logicaldoc.core.searchengine.StandardSearchEngine

All Implemented Interfaces:

SearchEngine

public class StandardSearchEngine
extends Object
implements SearchEngine

Standard implementation that implements a local search engine

Since:

6.5

Author:

Marco Meschieri - LogicalDOC

Field Summary

Fields

Modifier and Type	Field	Description
static org.apache.lucene.util.Version	VERSION

Method Summary

Modifier and Type	Method	Description
void	addHit(Document document, InputStream content)	Adds a new hit to the index
void	addHit(Document document, String content)	Adds a new Hit into the index
String	check()	Launch the check on the Index
void	close()	Closes all indexing operations, shuts down the engine.
void	deleteHit(long id)	Deletes an hit in the index of the search engine.
void	deleteHits(Collection<Long> ids)	Removed all passed hits from the index
void	dropIndex()	Drops the full-text index
long	getCount()	Returns the number of indexed documents in all indexes.
Hit	getHit(long id)
Object	getServer()	Service method to get access from the internal core
void	init()	To be called on the context startup, this method creates all indexes and unlock the existing ones
boolean	isLocked()	Check if at least one index is locked
void	optimize()	Launch the index optimization that physically deletes the removed entries.
long	purge()	Removes from the index those entries without a coutnerpart in the database
Hits	query(String expression, int page, int size)	Executes a low-level query in the fulltext index Attention: The hits will be populated with just the fields stored in the index
Hits	search(String expression, String[] filters, String expressionLanguage, Integer rows)	Search for hits. Attention: The hits will be populated with just the fields stored in the index
void	setConfig(ContextProperties config)
void	setDocumentDao(DocumentDAO documentDao)
void	setNoteDao(DocumentNoteDAO noteDao)
void	unlock()	This method can unlock a locked index.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

VERSION

public static org.apache.lucene.util.Version VERSION

Method Detail

setConfig

public void setConfig(ContextProperties config)

setDocumentDao

public void setDocumentDao(DocumentDAO documentDao)

addHit

public void addHit(Document document,
                   String content)
            throws Exception

Description copied from interface: SearchEngine

Adds a new Hit into the index

Specified by:

addHit in interface SearchEngine

Parameters:

document - The document to add into the index

content - The extracted body text

Throws:

Exception - is an error happens and the document cannot be added to the index

addHit

public void addHit(Document document,
                   InputStream content)
            throws Exception

Description copied from interface: SearchEngine

Adds a new hit to the index

Specified by:

addHit in interface SearchEngine

Parameters:

document - The document that we want to add

content - Stream of the document's file

Throws:

Exception - is an error happens and the document cannot be added to the index

optimize

public void optimize()

Description copied from interface: SearchEngine

Launch the index optimization that physically deletes the removed entries. This is a long running operation.

Specified by:

optimize in interface SearchEngine

check

public String check()

Description copied from interface: SearchEngine

Launch the check on the Index

Specified by:

check in interface SearchEngine

Returns:

the output of the check

deleteHit

public void deleteHit(long id)

Description copied from interface: SearchEngine

Deletes an hit in the index of the search engine.

Specified by:

deleteHit in interface SearchEngine

Parameters:

id - - id of the hit

deleteHits

public void deleteHits(Collection<Long> ids)

Description copied from interface: SearchEngine

Removed all passed hits from the index

Specified by:

deleteHits in interface SearchEngine

Parameters:

ids - Collection of hit identifiers

getHit

public Hit getHit(long id)

Specified by:

getHit in interface SearchEngine

query

public Hits query(String expression,
                  int page,
                  int size)

Description copied from interface: SearchEngine

Executes a low-level query in the fulltext index
Attention: The hits will be populated with just the fields stored in the index

Specified by:

query in interface SearchEngine

page - the page to retrieve

size - the maximum number of entries to retrieve

Returns:

the search result, ordered by ascending id

search

public Hits search(String expression,
                   String[] filters,
                   String expressionLanguage,
                   Integer rows)

Description copied from interface: SearchEngine

Search for hits.
Attention: The hits will be populated with just the fields stored in the index

Specified by:

search in interface SearchEngine

Parameters:

expression - the search expression

filters - a set of filter expressions, optional

expressionLanguage - the language in which the expression is writted

rows - maximum number elements to be returned

Returns:

the hits ordered by descending score

close

public void close()

Description copied from interface: SearchEngine

Closes all indexing operations, shuts down the engine.

Specified by:

close in interface SearchEngine

unlock

public void unlock()

Description copied from interface: SearchEngine

This method can unlock a locked index.

Specified by:

unlock in interface SearchEngine

isLocked

public boolean isLocked()

Description copied from interface: SearchEngine

Check if at least one index is locked

Specified by:

isLocked in interface SearchEngine

Returns:

true if one or more indexes are locked

getCount

public long getCount()

Description copied from interface: SearchEngine

Returns the number of indexed documents in all indexes. Used for statistical output.

Specified by:

getCount in interface SearchEngine

Returns:

the total number of entries in the index

See Also:

SearchEngine.getCount()

purge

public long purge()

Description copied from interface: SearchEngine

Removes from the index those entries without a coutnerpart in the database

Specified by:

purge in interface SearchEngine

Returns:

number of deleted entries

dropIndex

public void dropIndex()

Description copied from interface: SearchEngine

Drops the full-text index

Specified by:

dropIndex in interface SearchEngine

See Also:

SearchEngine.dropIndex()

init

public void init()

Description copied from interface: SearchEngine

To be called on the context startup, this method creates all indexes and unlock the existing ones

Specified by:

init in interface SearchEngine

See Also:

SearchEngine.init()

getServer

public Object getServer()

Description copied from interface: SearchEngine

Service method to get access from the internal core

Specified by:

getServer in interface SearchEngine

Returns:

the search server representation

setNoteDao

public void setNoteDao(DocumentNoteDAO noteDao)