org.apache.logging.log4j.core.impl

Class JdkMapAdapterStringMap

java.lang.Object

org.apache.logging.log4j.core.impl.JdkMapAdapterStringMap

All Implemented Interfaces:

java.io.Serializable, ReadOnlyStringMap, StringMap

class JdkMapAdapterStringMap
extends java.lang.Object
implements StringMap

Provides a read-only StringMap view of a Map<String, String>.

Field Summary

Fields

Modifier and Type	Field and Description
private static java.lang.String	FROZEN
private boolean	immutable
private java.util.Map<java.lang.String,java.lang.String>	map
private static java.util.Comparator<? super java.lang.String>	NULL_FIRST_COMPARATOR
private static TriConsumer<java.lang.String,java.lang.String,java.util.Map<java.lang.String,java.lang.String>>	PUT_ALL
private static long	serialVersionUID
private java.lang.String[]	sortedKeys

Constructor Summary

Constructors

Constructor and Description
JdkMapAdapterStringMap()
JdkMapAdapterStringMap(java.util.Map<java.lang.String,java.lang.String> map)

Method Summary

Modifier and Type	Method and Description
private void	assertNotFrozen()
void	clear() Removes all key-value pairs from this collection.
boolean	containsKey(java.lang.String key) Returns true if this data structure contains the specified key, false otherwise.
boolean	equals(java.lang.Object object) Indicates whether some other object is "equal to" this one.
<V> void	forEach(BiConsumer<java.lang.String,? super V> action) Performs the given action for each key-value pair in this data structure until all entries have been processed or the action throws an exception.
<V,S> void	forEach(TriConsumer<java.lang.String,? super V,S> action, S state) Performs the given action for each key-value pair in this data structure until all entries have been processed or the action throws an exception.
void	freeze() Makes this collection immutable.
private java.lang.String[]	getSortedKeys()
<V> V	getValue(java.lang.String key) Returns the value for the specified key, or null if the specified key does not exist in this collection.
int	hashCode() Returns a hash code value for the object.
boolean	isEmpty() Returns true if this collection is empty (size is zero), false otherwise.
boolean	isFrozen() Returns true if this object has been frozen, false otherwise.
void	putAll(ReadOnlyStringMap source) Copy all key-value pairs from the specified ReadOnlyStringMap into this StringMap.
void	putValue(java.lang.String key, java.lang.Object value) Puts the specified key-value pair into the collection.
void	remove(java.lang.String key) Removes the key-value pair for the specified key from this data structure.
int	size() Returns the number of key-value pairs in this collection.
java.util.Map<java.lang.String,java.lang.String>	toMap() Returns a non-null mutable Map<String, String> containing a snapshot of this data structure.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

FROZEN

private static final java.lang.String FROZEN

See Also:

Constant Field Values

NULL_FIRST_COMPARATOR

private static final java.util.Comparator<? super java.lang.String> NULL_FIRST_COMPARATOR

map

private final java.util.Map<java.lang.String,java.lang.String> map

immutable

private boolean immutable

sortedKeys

private transient java.lang.String[] sortedKeys

PUT_ALL

private static TriConsumer<java.lang.String,java.lang.String,java.util.Map<java.lang.String,java.lang.String>> PUT_ALL

Constructor Detail

JdkMapAdapterStringMap

public JdkMapAdapterStringMap()

JdkMapAdapterStringMap

public JdkMapAdapterStringMap(java.util.Map<java.lang.String,java.lang.String> map)

Method Detail

toMap

public java.util.Map<java.lang.String,java.lang.String> toMap()

Description copied from interface: ReadOnlyStringMap

Returns a non-null mutable Map<String, String> containing a snapshot of this data structure.

Specified by:

toMap in interface ReadOnlyStringMap

Returns:

a mutable copy of this data structure in Map<String, String> form

assertNotFrozen

private void assertNotFrozen()

containsKey

public boolean containsKey(java.lang.String key)

Description copied from interface: ReadOnlyStringMap

Returns true if this data structure contains the specified key, false otherwise.

Specified by:

containsKey in interface ReadOnlyStringMap

Parameters:

key - the key whose presence to check. May be null.

Returns:

true if this data structure contains the specified key, false otherwise

forEach

public <V> void forEach(BiConsumer<java.lang.String,? super V> action)

Description copied from interface: ReadOnlyStringMap

Performs the given action for each key-value pair in this data structure until all entries have been processed or the action throws an exception.

Some implementations may not support structural modifications (adding new elements or removing elements) while iterating over the contents. In such implementations, attempts to add or remove elements from the BiConsumer's BiConsumer.accept(Object, Object) accept} method may cause a ConcurrentModificationException to be thrown.

Specified by:

forEach in interface ReadOnlyStringMap

Type Parameters:

V - type of the value

Parameters:

action - The action to be performed for each key-value pair in this collection

forEach

public <V,S> void forEach(TriConsumer<java.lang.String,? super V,S> action,
                          S state)

Description copied from interface: ReadOnlyStringMap

Performs the given action for each key-value pair in this data structure until all entries have been processed or the action throws an exception.

The third parameter lets callers pass in a stateful object to be modified with the key-value pairs, so the TriConsumer implementation itself can be stateless and potentially reusable.

Some implementations may not support structural modifications (adding new elements or removing elements) while iterating over the contents. In such implementations, attempts to add or remove elements from the TriConsumer's accept method may cause a ConcurrentModificationException to be thrown.

Specified by:

forEach in interface ReadOnlyStringMap

Type Parameters:

V - type of the value

S - type of the third parameter

Parameters:

action - The action to be performed for each key-value pair in this collection

state - the object to be passed as the third parameter to each invocation on the specified triconsumer

getSortedKeys

private java.lang.String[] getSortedKeys()

getValue

public <V> V getValue(java.lang.String key)

Description copied from interface: ReadOnlyStringMap

Returns the value for the specified key, or null if the specified key does not exist in this collection.

Specified by:

getValue in interface ReadOnlyStringMap

Parameters:

key - the key whose value to return

Returns:

the value for the specified key or null

isEmpty

public boolean isEmpty()

Description copied from interface: ReadOnlyStringMap

Returns true if this collection is empty (size is zero), false otherwise.

Specified by:

isEmpty in interface ReadOnlyStringMap

Returns:

true if this collection is empty (size is zero)

size

public int size()

Description copied from interface: ReadOnlyStringMap

Returns the number of key-value pairs in this collection.

Specified by:

size in interface ReadOnlyStringMap

Returns:

the number of key-value pairs in this collection

clear

public void clear()

Description copied from interface: StringMap

Removes all key-value pairs from this collection.

Specified by:

clear in interface StringMap

freeze

public void freeze()

Description copied from interface: StringMap

Makes this collection immutable. Attempts to modify the collection after the freeze() method was called will result in an UnsupportedOperationException being thrown.

Specified by:

freeze in interface StringMap

isFrozen

public boolean isFrozen()

Description copied from interface: StringMap

Returns true if this object has been frozen, false otherwise.

Specified by:

isFrozen in interface StringMap

Returns:

true if this object has been frozen, false otherwise

putAll

public void putAll(ReadOnlyStringMap source)

Description copied from interface: StringMap

Copy all key-value pairs from the specified ReadOnlyStringMap into this StringMap.

Specified by:

putAll in interface StringMap

Parameters:

source - the ReadOnlyStringMap to copy key-value pairs from

putValue

public void putValue(java.lang.String key,
                     java.lang.Object value)

Description copied from interface: StringMap

Puts the specified key-value pair into the collection.

Specified by:

putValue in interface StringMap

Parameters:

key - the key to add or remove. Keys may be null.

value - the value to add. Values may be null.

remove

public void remove(java.lang.String key)

Description copied from interface: StringMap

Removes the key-value pair for the specified key from this data structure.

Specified by:

remove in interface StringMap

Parameters:

key - the key to remove. May be null.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(java.lang.Object object)

Description copied from interface: StringMap

Indicates whether some other object is "equal to" this one.

Specified by:

equals in interface StringMap

Overrides:

equals in class java.lang.Object

Parameters:

object - the reference object with which to compare.

Returns:

true if this object is the same as the obj argument; false otherwise.

See Also:

StringMap.hashCode()

hashCode

public int hashCode()

Description copied from interface: StringMap

Returns a hash code value for the object.

Specified by:

hashCode in interface StringMap

Overrides:

hashCode in class java.lang.Object

Returns:

a hash code value for this object.