Top Description Fields Constructors Methods
org.apache.catalina.util

public final Class ParameterMap<K, V>

extends Object
implements Map<K, V>, Serializable
Class Inheritance
All Implemented Interfaces
java.io.Serializable, java.util.Map
Type Parameters
<K>
The type of Key
<V>
The type of Value
Imports
java.io.Serializable, java.util.Collection, .Collections, .LinkedHashMap, .Map, .Set, org.apache.tomcat.util.res.StringManager

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

Field Summary

Modifier and TypeField and Description
private final Map<K, V>
private boolean
locked

The current lock state of this parameter map.

private static final long
private static final StringManager
sm

The string manager for this package.

private final Map<K, V>

Constructor Summary

AccessConstructor and Description
public
ParameterMap()

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

public
ParameterMap(int
The initial capacity of this map
initialCapacity
)

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

public
ParameterMap(int
The initial capacity of this map
initialCapacity
,
float
The load factor of this map
loadFactor
)

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

public
ParameterMap(Map<K, V>
Map whose contents are duplicated in the new map
map
)

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

Method Summary

Modifier and TypeMethod and Description
private void
public void
clear()

Implements java.util.Map.clear.

Removes all of the mappings from this map (optional operation).

public boolean
containsKey(Object
key whose presence in this map is to be tested
key
)

Implements java.util.Map.containsKey.

Returns true if this map contains a mapping for the specified key.

public boolean
containsValue(Object
value whose presence in this map is to be tested
value
)

Implements java.util.Map.containsValue.

Returns true if this map maps one or more keys to the specified value.

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

Implements java.util.Map.entrySet.

Returns a Set view of the mappings contained in this map.

public V
get(Object
the key whose associated value is to be returned
key
)

Implements java.util.Map.get.

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

public boolean
isEmpty()

Implements java.util.Map.isEmpty.

Returns true if this map contains no key-value mappings.

public boolean

Returns:

the locked state of this parameter map.
isLocked
()

public Set<K>
keySet()

Implements java.util.Map.keySet.

Returns a Set view of the keys contained in this map.

public V
put(K
key with which the specified value is to be associated
key
,
V
value to be associated with the specified key
value
)

Implements java.util.Map.put.

Associates the specified value with the specified key in this map (optional operation).

public void
putAll(Map<? extends K, ? extends V>
mappings to be stored in this map
map
)

Implements java.util.Map.putAll.

Copies all of the mappings from the specified map to this map (optional operation).

public V
remove(Object
key whose mapping is to be removed from the map
key
)

Implements java.util.Map.remove.

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

public void
setLocked(boolean
The new locked state
locked
)

Set the locked state of this parameter map.

public int
size()

Implements java.util.Map.size.

Returns the number of key-value mappings in this map.

public Collection<V>
values()

Implements java.util.Map.values.

Returns a Collection view of the values contained in this map.

Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Field Detail

delegatedMapback to summary
private final Map<K, V> delegatedMap
lockedback to summary
private boolean locked

The current lock state of this parameter map.

serialVersionUIDback to summary
private static final long serialVersionUID
smback to summary
private static final StringManager sm

The string manager for this package.

unmodifiableDelegatedMapback to summary
private final Map<K, V> unmodifiableDelegatedMap

Constructor Detail

ParameterMapback to summary
public ParameterMap()

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

ParameterMapback to summary
public ParameterMap(int initialCapacity)

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

Parameters
initialCapacity:int

The initial capacity of this map

ParameterMapback to summary
public ParameterMap(int initialCapacity, float loadFactor)

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

Parameters
initialCapacity:int

The initial capacity of this map

loadFactor:float

The load factor of this map

ParameterMapback to summary
public ParameterMap(Map<K, V> map)

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

Parameters
map:Map<K, V>

Map whose contents are duplicated in the new map

Method Detail

checkLockedback to summary
private void checkLocked()
clearback to summary
public void clear()

Implements java.util.Map.clear.

Doc from java.util.Map.clear.

Removes all of the mappings from this map (optional operation). The map will be empty after this call returns.

Annotations
@Override
Exceptions
IllegalStateException:
if this map is currently locked
containsKeyback to summary
public boolean containsKey(Object key)

Implements java.util.Map.containsKey.

Doc from java.util.Map.containsKey.

Returns true if this map contains a mapping for the specified key. More formally, returns true if and only if this map contains a mapping for a key k such that Objects.equals(key, k). (There can be at most one such mapping.)

Parameters
key:Object

key whose presence in this map is to be tested

Returns:boolean

true if this map contains a mapping for the specified key

Annotations
@Override
containsValueback to summary
public boolean containsValue(Object value)

Implements java.util.Map.containsValue.

Doc from java.util.Map.containsValue.

Returns true if this map maps one or more keys to the specified value. More formally, returns true if and only if this map contains at least one mapping to a value v such that Objects.equals(value, v). This operation will probably require time linear in the map size for most implementations of the Map interface.

Parameters
value:Object

value whose presence in this map is to be tested

Returns:boolean

true if this map maps one or more keys to the specified value

Annotations
@Override
entrySetback to summary
public Set<Map.Entry<K, V>> entrySet()

Implements java.util.Map.entrySet.

Doc from java.util.Map.entrySet.

Returns a Set view of the mappings contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. If the map is modified while an iteration over the set is in progress (except through the iterator's own remove operation, or through the setValue operation on a map entry returned by the iterator) the results of the iteration are undefined. The set supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Set.remove, removeAll, retainAll and clear operations. It does not support the add or addAll operations.

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

Returns:Set<Map.Entry<K, V>>

a set view of the mappings contained in this map

Annotations
@Override
getback to summary
public V get(Object key)

Implements java.util.Map.get.

Doc from java.util.Map.get.

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 Objects.equals(key, k), then this method returns v; otherwise it returns null. (There can be at most one such mapping.)

If this map permits null values, then 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.

Parameters
key:Object

the key whose associated value is to be returned

Returns:V

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

Annotations
@Override
isEmptyback to summary
public boolean isEmpty()

Implements java.util.Map.isEmpty.

Doc from java.util.Map.isEmpty.

Returns true if this map contains no key-value mappings.

Returns:boolean

true if this map contains no key-value mappings

Annotations
@Override
isLockedback to summary
public boolean isLocked()
Returns:boolean

the locked state of this parameter map.

keySetback to summary
public Set<K> keySet()

Implements java.util.Map.keySet.

Doc from java.util.Map.keySet.

Returns a Set view of the keys contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. If the map is modified while an iteration over the set is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. The set supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations.

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

Returns:Set<K>

a set view of the keys contained in this map

Annotations
@Override
putback to summary
public V put(K key, V value)

Implements java.util.Map.put.

Doc from java.util.Map.put.

Associates the specified value with the specified key in this map (optional operation). If the map previously contained a mapping for the key, the old value is replaced by the specified value. (A map m is said to contain a mapping for a key k if and only if m.containsKey(k) would return true.)

Parameters
key:K

key with which the specified value is to be associated

value:V

value to be associated with the specified key

Returns:V

the previous value associated with key, or null if there was no mapping for key. (A null return can also indicate that the map previously associated null with key, if the implementation supports null values.)

Annotations
@Override
Exceptions
IllegalStateException:
if this map is currently locked
putAllback to summary
public void putAll(Map<? extends K, ? extends V> map)

Implements java.util.Map.putAll.

Doc from java.util.Map.putAll.

Copies all of the mappings from the specified map to this map (optional operation). The effect of this call is equivalent to that of calling put(k, v) on this map once for each mapping from key k to value v in the specified map. The behavior of this operation is undefined if the specified map is modified while the operation is in progress. If the specified map has a defined encounter order, processing of its mappings generally occurs in that order.

Parameters
map:Map<? extends K, ? extends V>

mappings to be stored in this map

Annotations
@Override
Exceptions
IllegalStateException:
if this map is currently locked
removeback to summary
public V remove(Object key)

Implements java.util.Map.remove.

Doc from java.util.Map.remove.

Removes the mapping for a key from this map if it is present (optional operation). More formally, if this map contains a mapping from key k to value v such that Objects.equals(key, k), that mapping is removed. (The map can contain at most one such mapping.)

Returns the value to which this map previously associated the key, or null if the map contained no mapping for the key.

If this map permits null values, then a return value of null does not necessarily indicate that the map contained no mapping for the key; it's also possible that the map explicitly mapped the key to null.

The map will not contain a mapping for the specified key once the call returns.

Parameters
key:Object

key whose mapping is to be removed from the map

Returns:V

the previous value associated with key, or null if there was no mapping for key.

Annotations
@Override
Exceptions
IllegalStateException:
if this map is currently locked
setLockedback to summary
public void setLocked(boolean locked)

Set the locked state of this parameter map.

Parameters
locked:boolean

The new locked state

sizeback to summary
public int size()

Implements java.util.Map.size.

Doc from java.util.Map.size.

Returns the number of key-value mappings in this map. If the map contains more than Integer.MAX_VALUE elements, returns Integer.MAX_VALUE.

Returns:int

the number of key-value mappings in this map

Annotations
@Override
valuesback to summary
public Collection<V> values()

Implements java.util.Map.values.

Doc from java.util.Map.values.

Returns a Collection view of the values contained in this map. The collection is backed by the map, so changes to the map are reflected in the collection, and vice-versa. If the map is modified while an iteration over the collection is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. The collection supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Collection.remove, removeAll, retainAll and clear operations. It does not support the add or addAll operations.

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

Returns:Collection<V>

a collection view of the values contained in this map

Annotations
@Override