io.werval.api

Class MetaData

java.lang.Object

java.util.AbstractMap<K,V>

java.util.concurrent.ConcurrentHashMap<String,Object>

io.werval.api.MetaData

All Implemented Interfaces:

Serializable, Cloneable, ConcurrentMap< String, Object>, Map< String, Object>

public final class MetaData
extends ConcurrentHashMap<String,Object>
implements Cloneable

Meta-Data.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.concurrent.ConcurrentHashMap

ConcurrentHashMap.KeySetView<K,V>

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
MetaData()

Method Summary

Modifier and Type	Method and Description
Object	clone() Returns a shallow copy of this MetaData instance: the keys and values themselves are not cloned.
<T> T	get(Class<T> type, String key) Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.
<T> Optional<T>	getOptional(Class<T> type, String key) Optionaly returns the value to which the specified key is mapped.

Methods inherited from class java.util.concurrent.ConcurrentHashMap

clear, compute, computeIfAbsent, computeIfPresent, contains, containsKey, containsValue, elements, entrySet, equals, forEach, forEach, forEach, forEachEntry, forEachEntry, forEachKey, forEachKey, forEachValue, forEachValue, get, getOrDefault, hashCode, isEmpty, keys, keySet, keySet, mappingCount, merge, newKeySet, newKeySet, put, putAll, putIfAbsent, reduce, reduceEntries, reduceEntries, reduceEntriesToDouble, reduceEntriesToInt, reduceEntriesToLong, reduceKeys, reduceKeys, reduceKeysToDouble, reduceKeysToInt, reduceKeysToLong, reduceToDouble, reduceToInt, reduceToLong, reduceValues, reduceValues, reduceValuesToDouble, reduceValuesToInt, reduceValuesToLong, remove, remove, replace, replace, replaceAll, search, searchEntries, searchKeys, searchValues, size, toString, values

Methods inherited from class java.lang.Object

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

Constructor Detail

MetaData

public MetaData()

Method Detail

get

public <T> T get(Class<T> type,
                 String key)

Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.

More formally, if this map contains a mapping from a key k to a value v such that (key==null ? k==null : key.equals(k)), then this method returns v; otherwise it returns null. (There can be at most one such mapping.)

A return value of null does not necessarily indicate that the map contains no mapping for the key; it's also possible that the map explicitly maps the key to null. The containsKey operation may be used to distinguish these two cases.

Type Parameters:

T - Parameterized meta-data type

Parameters:

type - Requested meta-data type

key - Key

Returns:

The value to which the specified key is mapped, or null if this map contains no mapping for the key.

Throws:

ClassCastException - if the MetaData at the given key is not assignable to the given type.

getOptional

public <T> Optional<T> getOptional(Class<T> type,
                                   String key)

Optionaly returns the value to which the specified key is mapped.

See get(java.lang.Class, java.lang.String).

Type Parameters:

T - Parameterized meta-data type

Parameters:

type - Requested meta-data type

key - Key

Returns:

An Optional of the value to which the specified key is mapped.

Throws:

ClassCastException - if the MetaData at the given key is not assignable to the given type.

clone

public Object clone()

Returns a shallow copy of this MetaData instance: the keys and values themselves are not cloned.

Overrides:

clone in class AbstractMap<String,Object>

Returns:

a shallow copy of this MetaData