Package io.helidon.common.http

Class ReadOnlyParameters

java.lang.Object

io.helidon.common.http.ReadOnlyParameters

All Implemented Interfaces:

Parameters

public class ReadOnlyParameters
extends Object
implements Parameters

An immutable implementation of Parameters.

See Also:

Parameters

Constructor Summary

Constructors

Constructor and Description
ReadOnlyParameters(Map<String,List<String>> data) Creates an instance from provided multi-map.
ReadOnlyParameters(Parameters parameters) Creates an instance from provided multi-map.

Method Summary

Modifier and Type	Method and Description
void	add(String key, Iterable<String> values) Adds specified values tu association with the specified key (optional operation).
void	add(String key, String... values) Adds specified values tu association with the specified key (optional operation).
void	addAll(Parameters parameters) Copies all of the mappings from the specified parameters to this instance adding values to existing associations (optional operation).
List<String>	all(String name) Returns an unmodifiable List of all of the values of the given named parameter.
List<String>	computeIfAbsent(String key, Function<String,Iterable<String>> values) If the specified key is not already associated with a value computes new association using the given function and returns empty List, else returns the current value (optional operation).
List<String>	computeSingleIfAbsent(String key, Function<String,String> value) If the specified key is not already associated with a value computes new association using the given function and returns empty List, else returns the current value (optional operation).
static ReadOnlyParameters	empty() Returns empty and immutable singleton.
Optional<String>	first(String name) Returns an Optional containing the first value of the given parameter (and possibly multi-valued) parameter.
List<String>	put(String key, Iterable<String> values) Associates specified values with the specified key (optional operation).
List<String>	put(String key, String... values) Associates specified values with the specified key (optional operation).
void	putAll(Parameters parameters) Copies all of the mappings from the specified parameters to this instance replacing values of existing associations (optional operation).
List<String>	putIfAbsent(String key, Iterable<String> values) If the specified key is not already associated with a value associates it with the given value and returns empty List, else returns the current value (optional operation).
List<String>	putIfAbsent(String key, String... values) If the specified key is not already associated with a value associates it with the given value and returns empty List, else returns the current value (optional operation).
List<String>	remove(String key) Removes the mapping for a key if it is present (optional operation).
Map<String,List<String>>	toMap() Returns a copy of parameters as a Map.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.helidon.common.http.Parameters

toUnmodifiableParameters

Constructor Detail

ReadOnlyParameters

public ReadOnlyParameters(Map<String,List<String>> data)

Creates an instance from provided multi-map.

Parameters:

data - multi-map data to copy.

ReadOnlyParameters

public ReadOnlyParameters(Parameters parameters)

Creates an instance from provided multi-map.

Parameters:

parameters - parameters to copy.

Method Detail

empty

public static ReadOnlyParameters empty()

Returns empty and immutable singleton.

Returns:

the parameters singleton instance which is empty and immutable.

first

public Optional<String> first(String name)

Description copied from interface: Parameters

Returns an Optional containing the first value of the given parameter (and possibly multi-valued) parameter. If the parameter is not present, then the returned Optional is empty.

Specified by:

first in interface Parameters

Parameters:

name - the parameter name

Returns:

an Optional<V> for the first named value

all

public List<String> all(String name)

Description copied from interface: Parameters

Returns an unmodifiable List of all of the values of the given named parameter. Always returns a List, which may be empty if the parameter is not present.

Specified by:

all in interface Parameters

Parameters:

name - the parameter name

Returns:

a List of values with zero or greater size

put

public List<String> put(String key,
                        String... values)

Description copied from interface: Parameters

Associates specified values with the specified key (optional operation). If parameters previously contained a mapping for the key, the old values fully replaced.

Specified by:

put in interface Parameters

Parameters:

key - key with which the specified value is to be associated

values - value to be associated with the specified key

Returns:

the previous values associated with key, or empty List if there was no mapping for key.

put

public List<String> put(String key,
                        Iterable<String> values)

Description copied from interface: Parameters

Associates specified values with the specified key (optional operation). If parameters previously contained a mapping for the key, the old values fully replaced.

Specified by:

put in interface Parameters

Parameters:

key - key with which the specified value is to be associated

values - value to be associated with the specified key. If null then association will be removed.

Returns:

the previous values associated with key, or empty List if there was no mapping for key.

putIfAbsent

public List<String> putIfAbsent(String key,
                                String... values)

Description copied from interface: Parameters

If the specified key is not already associated with a value associates it with the given value and returns empty List, else returns the current value (optional operation).

Specified by:

putIfAbsent in interface Parameters

Parameters:

key - key with which the specified value is to be associated

values - value to be associated with the specified key

Returns:

the previous values associated with key, or empty List if there was no mapping for key.

putIfAbsent

public List<String> putIfAbsent(String key,
                                Iterable<String> values)

Description copied from interface: Parameters

If the specified key is not already associated with a value associates it with the given value and returns empty List, else returns the current value (optional operation).

Specified by:

putIfAbsent in interface Parameters

Parameters:

key - key with which the specified value is to be associated

values - value to be associated with the specified key

Returns:

the previous values associated with key, or empty List if there was no mapping for key.

computeIfAbsent

public List<String> computeIfAbsent(String key,
                                    Function<String,Iterable<String>> values)

Description copied from interface: Parameters

If the specified key is not already associated with a value computes new association using the given function and returns empty List, else returns the current value (optional operation).

Specified by:

computeIfAbsent in interface Parameters

Parameters:

key - key with which the specified value is to be associated

values - value to be associated with the specified key

Returns:

the current (potentially computed) values associated with key, or empty List if function returns null

putAll

public void putAll(Parameters parameters)

Description copied from interface: Parameters

Copies all of the mappings from the specified parameters to this instance replacing values of existing associations (optional operation).

Specified by:

putAll in interface Parameters

Parameters:

parameters - to copy.

add

public void add(String key,
                String... values)

Description copied from interface: Parameters

Adds specified values tu association with the specified key (optional operation). If parameters doesn't contains mapping, new mapping is created.

Specified by:

add in interface Parameters

Parameters:

key - key with which the specified value is to be associated

values - value to be add to association with the specified key

add

public void add(String key,
                Iterable<String> values)

Description copied from interface: Parameters

Adds specified values tu association with the specified key (optional operation). If parameters doesn't contains mapping, new mapping is created.

Specified by:

add in interface Parameters

Parameters:

key - key with which the specified value is to be associated

values - value to be add to association with the specified key. If null then noting will be add.

computeSingleIfAbsent

public List<String> computeSingleIfAbsent(String key,
                                          Function<String,String> value)

Description copied from interface: Parameters

If the specified key is not already associated with a value computes new association using the given function and returns empty List, else returns the current value (optional operation).

Specified by:

computeSingleIfAbsent in interface Parameters

Parameters:

key - a key with which the specified value is to be associated

value - a single value to be associated with the specified key

Returns:

the current (potentially computed) values associated with key, or empty List if function returns null

addAll

public void addAll(Parameters parameters)

Description copied from interface: Parameters

Copies all of the mappings from the specified parameters to this instance adding values to existing associations (optional operation).

Specified by:

addAll in interface Parameters

Parameters:

parameters - to copy.

remove

public List<String> remove(String key)

Description copied from interface: Parameters

Removes the mapping for a key if it is present (optional operation).

Specified by:

remove in interface Parameters

Parameters:

key - key whose mapping is to be removed.

Returns:

the previous value associated with key, or empty List.

toMap

public Map<String,List<String>> toMap()

Description copied from interface: Parameters

Returns a copy of parameters as a Map. This interface should only be used when it is required to iterate over the entire set of parameters.

Specified by:

toMap in interface Parameters

Returns:

the Map