java.lang.Object
javax.script.SimpleBindings
A simple implementation of Bindings backed by
a
HashMap
or some other specified Map
.- Since:
- 1.6
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Nested Class Summary
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Constructor Summary
ConstructorDescriptionDefault constructor uses aHashMap
.Constructor uses an existingMap
to store the values. -
Method Summary
Modifier and TypeMethodDescriptionvoid
clear()
Removes all of the mappings from this map (optional operation).boolean
containsKey
(Object key) Returnstrue
if this map contains a mapping for the specified key.boolean
containsValue
(Object value) Returnstrue
if this map maps one or more keys to the specified value.entrySet()
Returns aSet
view of the mappings contained in this map.Returns the value to which this map maps the specified key.boolean
isEmpty()
Returnstrue
if this map contains no key-value mappings.keySet()
Returns aSet
view of the keys contained in this map.Sets the specified key/value in the underlyingmap
field.void
putAll
is implemented usingMap.putAll
.Removes the mapping for this key from this map if it is present (optional operation).int
size()
Returns the number of key-value mappings in this map.values()
Returns aCollection
view of the values contained in this map.Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods declared in interface java.util.Map
compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll
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Constructor Details
-
SimpleBindings
Constructor uses an existingMap
to store the values.- Parameters:
m
- TheMap
backing thisSimpleBindings
.- Throws:
NullPointerException
- if m is null
-
SimpleBindings
public SimpleBindings()Default constructor uses aHashMap
.
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Method Details
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put
Sets the specified key/value in the underlyingmap
field.- Specified by:
put
in interfaceBindings
- Specified by:
put
in interfaceMap<String,
Object> - Parameters:
name
- Name of valuevalue
- Value to set.- Returns:
- Previous value for the specified key. Returns null if key was previously unset.
- Throws:
NullPointerException
- if the name is null.IllegalArgumentException
- if the name is empty.
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putAll
putAll
is implemented usingMap.putAll
.- Specified by:
putAll
in interfaceBindings
- Specified by:
putAll
in interfaceMap<String,
Object> - Parameters:
toMerge
- TheMap
of values to add.- Throws:
NullPointerException
- if toMerge map is null or if some key in the map is null.IllegalArgumentException
- if some key in the map is an empty String.
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clear
public void clear()Removes all of the mappings from this map (optional operation). The map will be empty after this call returns. -
containsKey
Returnstrue
if this map contains a mapping for the specified key. More formally, returnstrue
if and only if this map contains a mapping for a keyk
such that(key==null ? k==null : key.equals(k))
. (There can be at most one such mapping.)- Specified by:
containsKey
in interfaceBindings
- Specified by:
containsKey
in interfaceMap<String,
Object> - Parameters:
key
- key whose presence in this map is to be tested.- Returns:
true
if this map contains a mapping for the specified key.- Throws:
NullPointerException
- if key is nullClassCastException
- if key is not StringIllegalArgumentException
- if key is empty String
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containsValue
Returnstrue
if this map maps one or more keys to the specified value. More formally, returnstrue
if and only if this map contains at least one mapping to a valuev
such thatObjects.equals(value, v)
. This operation will probably require time linear in the map size for most implementations of theMap
interface.- Specified by:
containsValue
in interfaceMap<String,
Object> - Parameters:
value
- value whose presence in this map is to be tested- Returns:
true
if this map maps one or more keys to the specified value
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entrySet
Returns aSet
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 ownremove
operation, or through thesetValue
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 theIterator.remove
,Set.remove
,removeAll
,retainAll
andclear
operations. It does not support theadd
oraddAll
operations. -
get
Returns the value to which this map maps the specified key. Returnsnull
if the map contains no mapping for this key. A return value ofnull
does not necessarily indicate that the map contains no mapping for the key; it's also possible that the map explicitly maps the key tonull
. ThecontainsKey
operation may be used to distinguish these two cases.More formally, if this map contains a mapping from a key
k
to a valuev
such that(key==null ? k==null : key.equals(k))
, then this method returnsv
; otherwise it returnsnull
. (There can be at most one such mapping.)- Specified by:
get
in interfaceBindings
- Specified by:
get
in interfaceMap<String,
Object> - Parameters:
key
- key whose associated value is to be returned.- Returns:
- the value to which this map maps the specified key, or
null
if the map contains no mapping for this key. - Throws:
NullPointerException
- if key is nullClassCastException
- if key is not StringIllegalArgumentException
- if key is empty String
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isEmpty
public boolean isEmpty()Returnstrue
if this map contains no key-value mappings. -
keySet
Returns aSet
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 ownremove
operation), the results of the iteration are undefined. The set supports element removal, which removes the corresponding mapping from the map, via theIterator.remove
,Set.remove
,removeAll
,retainAll
, andclear
operations. It does not support theadd
oraddAll
operations. -
remove
Removes the mapping for this key from this map if it is present (optional operation). More formally, if this map contains a mapping from keyk
to valuev
such that(key==null ? k==null : key.equals(k))
, that mapping is removed. (The map can contain at most one such mapping.)Returns the value to which the map previously associated the key, or
null
if the map contained no mapping for this key. (Anull
return can also indicate that the map previously associatednull
with the specified key if the implementation supportsnull
values.) The map will not contain a mapping for the specified key once the call returns.- Specified by:
remove
in interfaceBindings
- Specified by:
remove
in interfaceMap<String,
Object> - Parameters:
key
- key whose mapping is to be removed from the map.- Returns:
- previous value associated with specified key, or
null
if there was no mapping for key. - Throws:
NullPointerException
- if key is nullClassCastException
- if key is not StringIllegalArgumentException
- if key is empty String
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size
public int size()Returns the number of key-value mappings in this map. If the map contains more thanInteger.MAX_VALUE
elements, returnsInteger.MAX_VALUE
. -
values
Returns aCollection
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 ownremove
operation), the results of the iteration are undefined. The collection supports element removal, which removes the corresponding mapping from the map, via theIterator.remove
,Collection.remove
,removeAll
,retainAll
andclear
operations. It does not support theadd
oraddAll
operations.
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