org.millscript.commons.util.defaults
Class ConstantListDefault<V>

java.lang.Object
  org.millscript.commons.util.defaults.ConstantListDefault<V>

All Implemented Interfaces:

IListDefault<V>, IMapDefault<java.lang.Integer,V>

public class ConstantListDefault<V>
extends java.lang.Object
implements IListDefault<V>

The class provides a default implementation which returns a constant value.

Constructor Summary

ConstantListDefault(V def)
Constructs a new constant default object which will use the specified default value.

Method Summary

V	first(IList<V> list) Returns the value to use when there is no first element in the list.
V	get(IMap<java.lang.Integer,V> map, java.lang.Integer key) Returns the value to use when the specified key is not valid in the for the mapping.
V	last(IList<V> list) Returns the value to use when there is no last element in the list.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstantListDefault

public ConstantListDefault(V def)

Constructs a new constant default object which will use the specified default value.

Parameters:

def - the default value

Method Detail

first

public V first(IList<V> list)

Description copied from interface: IListDefault

Returns the value to use when there is no first element in the list.

Specified by:

first in interface IListDefault<V>

Parameters:

list - the list which requested the default value for the first element

Returns:

the default value for when there is no first element

See Also:

IListDefault.first(IList)

get

public V get(IMap<java.lang.Integer,V> map,
             java.lang.Integer key)

Description copied from interface: IMapDefault

Returns the value to use when the specified key is not valid in the for the mapping.

Specified by:

get in interface IMapDefault<java.lang.Integer,V>

Parameters:

map - the map which requested the default value for the given key

key - the key that is not valid for the mapping

Returns:

the default value for when the key is not valid

See Also:

org.millscript.commons.util.IMapDefault#get(IMap, K)

last

public V last(IList<V> list)

Description copied from interface: IListDefault

Returns the value to use when there is no last element in the list.

Specified by:

last in interface IListDefault<V>

Parameters:

list - the list which requested the default value for the last element

Returns:

the default value for when there is no last element

See Also:

IListDefault.last(IList)