com.hazelcast.query.impl

Class PredicateBuilderImpl

java.lang.Object

com.hazelcast.query.impl.PredicateBuilderImpl

All Implemented Interfaces:

DataSerializable, IndexAwarePredicate, Predicate, PredicateBuilder, PredicateBuilder.EntryObject, Serializable

public class PredicateBuilderImpl
extends Object
implements PredicateBuilder, PredicateBuilder.EntryObject, IndexAwarePredicate, DataSerializable

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.hazelcast.query.PredicateBuilder

PredicateBuilder.EntryObject

Constructor Summary

Constructors

Constructor and Description
PredicateBuilderImpl()

Method Summary

Modifier and Type	Method and Description
PredicateBuilder	and(Predicate predicate)
boolean	apply(Map.Entry mapEntry) Applies this predicate to the given map entry.
PredicateBuilder	between(Comparable from, Comparable to)
PredicateBuilder	equal(Comparable value)
Set<QueryableEntry>	filter(QueryContext queryContext) Produces a filtered entry set by utilizing the indexes available while executing the query in the given query context.
PredicateBuilder.EntryObject	get(String attribute)
String	getAttribute()
PredicateBuilder.EntryObject	getEntryObject()
PredicateBuilder	greaterEqual(Comparable value)
PredicateBuilder	greaterThan(Comparable value)
PredicateBuilder	in(Comparable... values)
PredicateBuilder	is(String attribute)
boolean	isIndexed(QueryContext queryContext) Signals to the query engine that this predicate is able to utilize the indexes available while executing the query in the given query context.
PredicateBuilder	isNot(String attribute)
PredicateBuilder	isNotNull()
PredicateBuilder	isNull()
PredicateBuilder.EntryObject	key()
PredicateBuilder	lessEqual(Comparable value)
PredicateBuilder	lessThan(Comparable value)
PredicateBuilder	notEqual(Comparable value)
PredicateBuilder	or(Predicate predicate)
void	readData(ObjectDataInput in) Reads fields from the input stream
void	setAttribute(String attribute)
String	toString()
void	writeData(ObjectDataOutput out) Writes object fields to output stream

Methods inherited from class java.lang.Object

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

Constructor Detail

PredicateBuilderImpl

public PredicateBuilderImpl()

Method Detail

getAttribute

public String getAttribute()

Specified by:

getAttribute in interface PredicateBuilder

setAttribute

public void setAttribute(String attribute)

Specified by:

setAttribute in interface PredicateBuilder

apply

public boolean apply(Map.Entry mapEntry)

Description copied from interface: Predicate

Applies this predicate to the given map entry.

Implementations must be thread-safe, since this method may be called by multiple threads concurrently.

Specified by:

apply in interface Predicate

Parameters:

mapEntry - the map entry to apply this predicate to.

Returns:

true if the given map entry matches this predicate, false otherwise.

getEntryObject

public PredicateBuilder.EntryObject getEntryObject()

Specified by:

getEntryObject in interface PredicateBuilder

and

public PredicateBuilder and(Predicate predicate)

Specified by:

and in interface PredicateBuilder

or

public PredicateBuilder or(Predicate predicate)

Specified by:

or in interface PredicateBuilder

filter

public Set<QueryableEntry> filter(QueryContext queryContext)

Description copied from interface: IndexAwarePredicate

Produces a filtered entry set by utilizing the indexes available while executing the query in the given query context.

The query engine assumes this method produces the result set faster than a simple evaluation of the predicate on every entry.

Specified by:

filter in interface IndexAwarePredicate

Parameters:

queryContext - the query context to access the indexes. The passed query context is valid only for a duration of a single call to the method.

Returns:

the produced filtered entry set.

isIndexed

public boolean isIndexed(QueryContext queryContext)

Description copied from interface: IndexAwarePredicate

Signals to the query engine that this predicate is able to utilize the indexes available while executing the query in the given query context.

Specified by:

isIndexed in interface IndexAwarePredicate

Parameters:

queryContext - the query context to consult for the available indexes.

Returns:

true if this predicate is able to use the indexes to speed up the processing, false otherwise.

writeData

public void writeData(ObjectDataOutput out)
               throws IOException

Description copied from interface: DataSerializable

Writes object fields to output stream

Specified by:

writeData in interface DataSerializable

Parameters:

out - output

Throws:

IOException - if an I/O error occurs. In particular, an IOException may be thrown if the output stream has been closed.

readData

public void readData(ObjectDataInput in)
              throws IOException

Description copied from interface: DataSerializable

Reads fields from the input stream

Specified by:

readData in interface DataSerializable

Parameters:

in - input

Throws:

IOException - if an I/O error occurs. In particular, an IOException may be thrown if the input stream has been closed.

toString

public String toString()

Overrides:

toString in class Object

get

public PredicateBuilder.EntryObject get(String attribute)

Specified by:

get in interface PredicateBuilder.EntryObject

key

public PredicateBuilder.EntryObject key()

Specified by:

key in interface PredicateBuilder.EntryObject

is

public PredicateBuilder is(String attribute)

Specified by:

is in interface PredicateBuilder.EntryObject

isNot

public PredicateBuilder isNot(String attribute)

Specified by:

isNot in interface PredicateBuilder.EntryObject

equal

public PredicateBuilder equal(Comparable value)

Specified by:

equal in interface PredicateBuilder.EntryObject

notEqual

public PredicateBuilder notEqual(Comparable value)

Specified by:

notEqual in interface PredicateBuilder.EntryObject

isNull

public PredicateBuilder isNull()

Specified by:

isNull in interface PredicateBuilder.EntryObject

isNotNull

public PredicateBuilder isNotNull()

Specified by:

isNotNull in interface PredicateBuilder.EntryObject

greaterThan

public PredicateBuilder greaterThan(Comparable value)

Specified by:

greaterThan in interface PredicateBuilder.EntryObject

greaterEqual

public PredicateBuilder greaterEqual(Comparable value)

Specified by:

greaterEqual in interface PredicateBuilder.EntryObject

lessThan

public PredicateBuilder lessThan(Comparable value)

Specified by:

lessThan in interface PredicateBuilder.EntryObject

lessEqual

public PredicateBuilder lessEqual(Comparable value)

Specified by:

lessEqual in interface PredicateBuilder.EntryObject

between

public PredicateBuilder between(Comparable from,
                                Comparable to)

Specified by:

between in interface PredicateBuilder.EntryObject

in

public PredicateBuilder in(Comparable... values)

Specified by:

in in interface PredicateBuilder.EntryObject