org.xnio
Class OptionMap

java.lang.Object
  org.xnio.OptionMap

All Implemented Interfaces:

Serializable, Iterable<Option<?>>

public final class OptionMap
extends Object
implements Iterable<Option<?>>, Serializable

An immutable map of options to option values. No null keys or values are permitted.

See Also:

Serialized Form

Nested Class Summary

static class

OptionMap.Builder A builder for immutable option maps.

Field Summary

static OptionMap

EMPTY The empty option map.

Method Summary

static OptionMap.Builder	builder() Create a new builder.
boolean	contains(Option<?> option) Determine whether this option map contains the given option.
static <T> OptionMap	create(Option<T> option, T value) Create a single-valued option map.
static <T1,T2> OptionMap	create(Option<T1> option1, T1 value1, Option<T2> option2, T2 value2) Create a two-valued option map.
boolean	equals(Object other) Determine whether this option map is equal to another.
boolean	equals(OptionMap other) Determine whether this option map is equal to another.
boolean	get(Option<Boolean> option, boolean defaultValue) Get a boolean value from this option map, with a specified default if the value is missing.
int	get(Option<Integer> option, int defaultValue) Get a int value from this option map, with a specified default if the value is missing.
long	get(Option<Long> option, long defaultValue) Get a long value from this option map, with a specified default if the value is missing.
<T> T	get(Option<T> option) Get the value of an option from this option map.
<T> T	get(Option<T> option, T defaultValue) Get the value of an option from this option map, with a specified default if the value is missing.
int	hashCode() Get the hash code for this option map.
Iterator<Option<?>>	iterator() Iterate over the options in this map.
int	size() Get the number of options stored in this map.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

EMPTY

public static final OptionMap EMPTY

The empty option map.

Method Detail

contains

public boolean contains(Option<?> option)

Determine whether this option map contains the given option.

Parameters:

option - the option to check

Returns:

true if the option is present in the option map

get

public <T> T get(Option<T> option)

Get the value of an option from this option map.

Type Parameters:

T - the type of the option

Parameters:

option - the option to get

Returns:

the option value, or null if it is not present

get

public <T> T get(Option<T> option,
                 T defaultValue)

Get the value of an option from this option map, with a specified default if the value is missing.

Type Parameters:

T - the type of the option

Parameters:

option - the option to get

defaultValue - the value to return if the option is not set

Returns:

the option value, or null if it is not present

get

public boolean get(Option<Boolean> option,
                   boolean defaultValue)

Get a boolean value from this option map, with a specified default if the value is missing.

Parameters:

option - the option to get

defaultValue - the default value if the option is not present

Returns:

the result

get

public int get(Option<Integer> option,
               int defaultValue)

Get a int value from this option map, with a specified default if the value is missing.

Parameters:

option - the option to get

defaultValue - the default value if the option is not present

Returns:

the result

get

public long get(Option<Long> option,
                long defaultValue)

Get a long value from this option map, with a specified default if the value is missing.

Parameters:

option - the option to get

defaultValue - the default value if the option is not present

Returns:

the result

iterator

public Iterator<Option<?>> iterator()

Iterate over the options in this map.

Specified by:

iterator in interface Iterable<Option<?>>

Returns:

an iterator over the options

size

public int size()

Get the number of options stored in this map.

Returns:

the number of options

builder

public static OptionMap.Builder builder()

Create a new builder.

Returns:

a new builder

create

public static <T> OptionMap create(Option<T> option,
                                   T value)

Create a single-valued option map.

Type Parameters:

T - the option value type

Parameters:

option - the option to put in the map

value - the option value

Returns:

the option map

Since:

3.0

create

public static <T1,T2> OptionMap create(Option<T1> option1,
                                       T1 value1,
                                       Option<T2> option2,
                                       T2 value2)

Create a two-valued option map. If both options are the same key, then only the second one is added to the map.

Type Parameters:

T1 - the first option value type

T2 - the second option value type

Parameters:

option1 - the first option to put in the map

value1 - the first option value

option2 - the second option to put in the map

value2 - the second option value

Returns:

the option map

Since:

3.0

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object other)

Determine whether this option map is equal to another.

Overrides:

equals in class Object

Parameters:

other - the other option map

Returns:

true if they are equal, false otherwise

equals

public boolean equals(OptionMap other)

Determine whether this option map is equal to another.

Parameters:

other - the other option map

Returns:

true if they are equal, false otherwise

hashCode

public int hashCode()

Get the hash code for this option map.

Overrides:

hashCode in class Object

Returns:

the hash code