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
ConstructorsConstructorDescriptionDefault constructor uses aHashMap.Constructor uses an existingMapto store the values. -
Method Summary
Modifier and TypeMethodDescriptionvoidclear()Removes all of the mappings from this map (optional operation).booleancontainsKey(Object key) Returnstrueif this map contains a mapping for the specified key.booleancontainsValue(Object value) Returnstrueif this map maps one or more keys to the specified value.entrySet()Returns aSetview of the mappings contained in this map.Returns the value to which this map maps the specified key.booleanisEmpty()Returnstrueif this map contains no key-value mappings.keySet()Returns aSetview of the keys contained in this map.Sets the specified key/value in the underlyingmapfield.voidputAllis implemented usingMap.putAll.Removes the mapping for this key from this map if it is present (optional operation).intsize()Returns the number of key-value mappings in this map.values()Returns aCollectionview of the values contained in this map.Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitMethods 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
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SimpleBindings
Constructor uses an existingMapto store the values.- Parameters:
m- TheMapbacking thisSimpleBindings.- Throws:
NullPointerException- if m is null
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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 underlyingmapfield.- Specified by:
putin interfaceBindings- Specified by:
putin 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
putAllis implemented usingMap.putAll.- Specified by:
putAllin interfaceBindings- Specified by:
putAllin interfaceMap<String,Object> - Parameters:
toMerge- TheMapof 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
Returnstrueif this map contains a mapping for the specified key. More formally, returnstrueif and only if this map contains a mapping for a keyksuch that(key==null ? k==null : key.equals(k)). (There can be at most one such mapping.)- Specified by:
containsKeyin interfaceBindings- Specified by:
containsKeyin interfaceMap<String,Object> - Parameters:
key- key whose presence in this map is to be tested.- Returns:
trueif 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
Returnstrueif this map maps one or more keys to the specified value. More formally, returnstrueif and only if this map contains at least one mapping to a valuevsuch thatObjects.equals(value, v). This operation will probably require time linear in the map size for most implementations of theMapinterface.- Specified by:
containsValuein interfaceMap<String,Object> - Parameters:
value- value whose presence in this map is to be tested- Returns:
trueif this map maps one or more keys to the specified value
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entrySet
Returns aSetview 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 ownremoveoperation, or through thesetValueoperation 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,retainAllandclearoperations. It does not support theaddoraddAlloperations. -
get
Returns the value to which this map maps the specified key. Returnsnullif the map contains no mapping for this key. A return value ofnulldoes not necessarily indicate that the map contains no mapping for the key; it's also possible that the map explicitly maps the key tonull. ThecontainsKeyoperation may be used to distinguish these two cases.More formally, if this map contains a mapping from a key
kto a valuevsuch 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:
getin interfaceBindings- Specified by:
getin 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
nullif 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()Returnstrueif this map contains no key-value mappings. -
keySet
Returns aSetview 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 ownremoveoperation), 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, andclearoperations. It does not support theaddoraddAlloperations. -
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 keykto valuevsuch 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
nullif the map contained no mapping for this key. (Anullreturn can also indicate that the map previously associatednullwith the specified key if the implementation supportsnullvalues.) The map will not contain a mapping for the specified key once the call returns.- Specified by:
removein interfaceBindings- Specified by:
removein interfaceMap<String,Object> - Parameters:
key- key whose mapping is to be removed from the map.- Returns:
- previous value associated with specified key, or
nullif 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_VALUEelements, returnsInteger.MAX_VALUE. -
values
Returns aCollectionview 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 ownremoveoperation), 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,retainAllandclearoperations. It does not support theaddoraddAlloperations.
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