com.bigdata.bop

Class DefaultQueryAttributes

java.lang.Object

com.bigdata.bop.DefaultQueryAttributes

All Implemented Interfaces:

IQueryAttributes

public class DefaultQueryAttributes
extends Object
implements IQueryAttributes

Default implementation.

Version:

$Id$

Author:

Bryan Thompson

Constructor Summary

Constructors

Constructor and Description
DefaultQueryAttributes()

Method Summary

Methods

Modifier and Type	Method and Description
Object	get(Object key) Return the attribute value under the key.
Object	put(Object key, Object val) Bind an attribute under the key.
Object	putIfAbsent(Object key, Object val) Atomically bind an attribute value under the key iff the key is not already bound.
Object	remove(Object key) Remove the attribute under the key.
boolean	remove(Object key, Object value) Atomically remove the attribute under the key iff it has the given value.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultQueryAttributes

public DefaultQueryAttributes()

Method Detail

get

public Object get(Object key)

Description copied from interface: IQueryAttributes

Return the attribute value under the key.

Specified by:

get in interface IQueryAttributes

Parameters:

key - The key.

Returns:

The attribute value under that key -or- null if there is no bound attribute for that key.

put

public Object put(Object key,
         Object val)

Description copied from interface: IQueryAttributes

Bind an attribute under the key.

Specified by:

put in interface IQueryAttributes

Parameters:

key - The key.

val - The new value (may not be null).

Returns:

The old value.

See Also:

IQueryAttributes.get(Object)

putIfAbsent

public Object putIfAbsent(Object key,
                 Object val)

Description copied from interface: IQueryAttributes

Atomically bind an attribute value under the key iff the key is not already bound.

Specified by:

putIfAbsent in interface IQueryAttributes

Parameters:

key - The key.

val - The new value (may not be null).

Returns:

The old value.

remove

public Object remove(Object key)

Description copied from interface: IQueryAttributes

Remove the attribute under the key.

Specified by:

remove in interface IQueryAttributes

Parameters:

key - The key.

Returns:

The old value.

remove

public boolean remove(Object key,
             Object value)

Description copied from interface: IQueryAttributes

Atomically remove the attribute under the key iff it has the given value.

Specified by:

remove in interface IQueryAttributes

Parameters:

key - The key.

value - The expected value for that key.

Returns:

true iff the entry for that key was removed.

toString

public String toString()

Overrides:

toString in class Object