org.apache.ignite.cache.query

Class TextQuery<K,V>

java.lang.Object

org.apache.ignite.cache.query.Query<javax.cache.Cache.Entry<K,V>>

org.apache.ignite.cache.query.TextQuery<K,V>

All Implemented Interfaces:

Serializable

public final class TextQuery<K,V>
extends Query<javax.cache.Cache.Entry<K,V>>

Full text queries based on Apache Lucene engine.

Description

Ignite supports full text queries based on Apache Lucene engine. Note that all fields that are expected to show up in text query results must be annotated with QueryTextField

Query usage

Ignite TextQuery supports classic Lucene query syntax. See Lucene classic MultiFieldQueryParser and StandardAnalyzer javadoc for details. As an example, suppose we have data model consisting of 'Employee' class defined as follows:

 public class Person {
     private long id;

     private String name;

     // Index for text search.
     @QueryTextField
     private String resume;
     ...
 }
 

Here is a possible query that will use Lucene text search to scan all resumes to check if employees have Master degree:

 Query<Cache.Entry<Long, Person>> qry =
     new TextQuery(Person.class, "Master");

 // Query all cache nodes.
 cache.query(qry).getAll();
 

See Also:

IgniteCache.query(Query), Serialized Form

Field Summary

Fields inherited from class org.apache.ignite.cache.query.Query

DFLT_PAGE_SIZE

Constructor Summary

Constructors

Constructor and Description
TextQuery(Class<?> type, String txt) Constructs query for the given search string.
TextQuery(String type, String txt) Constructs query for the given search string.

Method Summary

Modifier and Type	Method and Description
String	getText() Gets text search string.
String	getType() Gets type for query.
TextQuery<K,V>	setLocal(boolean loc) Sets whether this query should be executed on local node only.
TextQuery<K,V>	setPageSize(int pageSize) Sets optional page size, if 0, then default is used.
TextQuery<K,V>	setText(String txt) Sets text search string.
TextQuery<K,V>	setType(Class<?> type) Sets type for query.
TextQuery<K,V>	setType(String type) Sets type for query.
String	toString()

Methods inherited from class org.apache.ignite.cache.query.Query

getPageSize, isLocal, prepare

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

TextQuery

public TextQuery(String type,
                 String txt)

Constructs query for the given search string.

Parameters:

type - Type.

txt - Search string.

TextQuery

public TextQuery(Class<?> type,
                 String txt)

Constructs query for the given search string.

Parameters:

type - Type.

txt - Search string.

Method Detail

getType

public String getType()

Gets type for query.

Returns:

Type.

setType

public TextQuery<K,V> setType(Class<?> type)

Sets type for query.

Parameters:

type - Type.

Returns:

this For chaining.

setType

public TextQuery<K,V> setType(String type)

Sets type for query.

Parameters:

type - Type.

Returns:

this For chaining.

getText

public String getText()

Gets text search string.

Returns:

Text search string.

setText

public TextQuery<K,V> setText(String txt)

Sets text search string.

Parameters:

txt - Text search string.

Returns:

this For chaining.

setPageSize

public TextQuery<K,V> setPageSize(int pageSize)

Sets optional page size, if 0, then default is used.

Overrides:

setPageSize in class Query<javax.cache.Cache.Entry<K,V>>

Parameters:

pageSize - Optional page size.

Returns:

this for chaining.

setLocal

public TextQuery<K,V> setLocal(boolean loc)

Sets whether this query should be executed on local node only.

Overrides:

setLocal in class Query<javax.cache.Cache.Entry<K,V>>

Parameters:

loc - Local flag.

Returns:

this for chaining.

toString

public String toString()

Overrides:

toString in class Query<javax.cache.Cache.Entry<K,V>>