Package org.apache.catalina.util

Class ParameterMap<K,V>

java.lang.Object

org.apache.catalina.util.ParameterMap<K,V>

Type Parameters:

K - The type of Key

V - The type of Value

All Implemented Interfaces:

Serializable, Map<K,V>

public final class ParameterMap<K,V>
extends Object
implements Map<K,V>, Serializable

Implementation of java.util.Map that includes a locked property. This class can be used to safely expose Catalina internal parameter map objects to user classes without having to clone them in order to avoid modifications. When first created, a ParameterMap instance is not locked.

Author:

Craig R. McClanahan

See Also:

• Serialized Form

Nested Class Summary

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

Map.Entry<K,V>

Constructor Summary

Constructors

Constructor	Description
ParameterMap()	Construct a new, empty map with the default initial capacity and load factor.
ParameterMap(int initialCapacity)	Construct a new, empty map with the specified initial capacity and default load factor.
ParameterMap(int initialCapacity, float loadFactor)	Construct a new, empty map with the specified initial capacity and load factor.
ParameterMap(Map<K,V> map)	Construct a new map with the same mappings as the given map.

Method Summary

Modifier and Type	Method	Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
boolean	isEmpty()
boolean	isLocked()
Set<K>	keySet()
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> map)
V	remove(Object key)
void	setLocked(boolean locked)	Set the locked state of this parameter map.
int	size()
Collection<V>	values()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll

Constructor Details

ParameterMap

public ParameterMap()

Construct a new, empty map with the default initial capacity and load factor.

ParameterMap

public ParameterMap(int initialCapacity)

Construct a new, empty map with the specified initial capacity and default load factor.

Parameters:

initialCapacity - The initial capacity of this map

ParameterMap

public ParameterMap(int initialCapacity,
 float loadFactor)

Construct a new, empty map with the specified initial capacity and load factor.

Parameters:

initialCapacity - The initial capacity of this map

loadFactor - The load factor of this map

ParameterMap

public ParameterMap(Map<K,V> map)

Construct a new map with the same mappings as the given map.

Parameters:

map - Map whose contents are duplicated in the new map

Method Details

isLocked

public boolean isLocked()

Returns:

the locked state of this parameter map.

setLocked

public void setLocked(boolean locked)

Set the locked state of this parameter map.

Parameters:

locked - The new locked state

clear

public void clear()

Specified by:

clear in interface Map<K,V>

Throws:

IllegalStateException - if this map is currently locked

put

public V put(K key,
 V value)

Specified by:

put in interface Map<K,V>

Throws:

IllegalStateException - if this map is currently locked

putAll

public void putAll(Map<? extends K,? extends V> map)

Specified by:

putAll in interface Map<K,V>

Throws:

IllegalStateException - if this map is currently locked

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

Throws:

IllegalStateException - if this map is currently locked

size

public int size()

Specified by:

size in interface Map<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K,V>

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

keySet

public Set<K> keySet()

Returns an unmodifiable Set view of the keys contained in this map if it is locked.

Specified by:

keySet in interface Map<K,V>

values

public Collection<V> values()

Returns an unmodifiable Collection view of the values contained in this map if it is locked.

Specified by:

values in interface Map<K,V>

entrySet

public Set<Map.Entry<K,V>> entrySet()

Returns an unmodifiable Set view of the mappings contained in this map if it is locked.

Specified by:

entrySet in interface Map<K,V>