Class SimpleBindings
- java.lang.Object
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- javax.script.SimpleBindings
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Constructor Summary
Constructors Constructor and Description SimpleBindings()
Default constructor uses aHashMap
.SimpleBindings(Map<String,Object> m)
Constructor uses an existingMap
to store the values.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method and Description void
clear()
Removes all of the mappings from this map (optional operation).boolean
containsKey(Object key)
Returns true if this map contains a mapping for the specified key.boolean
containsValue(Object value)
Returns true if this map maps one or more keys to the specified value.Set<Map.Entry<String,Object>>
entrySet()
Returns aSet
view of the mappings contained in this map.Object
get(Object key)
Returns the value to which this map maps the specified key.boolean
isEmpty()
Returns true if this map contains no key-value mappings.Set<String>
keySet()
Returns aSet
view of the keys contained in this map.Object
put(String name, Object value)
Sets the specified key/value in the underlyingmap
field.void
putAll(Map<? extends String,? extends Object> toMerge)
putAll
is implemented usingMap.putAll
.Object
remove(Object key)
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.Collection<Object>
values()
Returns aCollection
view of the values contained in this map.-
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface java.util.Map
compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll
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Constructor Detail
SimpleBindings
public SimpleBindings(Map<String,Object> m)
Constructor uses an existingMap
to store the values.- Parameters:
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m
- TheMap
backing thisSimpleBindings
. - Throws:
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NullPointerException
- if m is null
SimpleBindings
public SimpleBindings()
Default constructor uses aHashMap
.
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Method Detail
put
public Object put(String name, Object value)
Sets the specified key/value in the underlyingmap
field.- Specified by:
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put
in interfaceMap<String,Object>
- Specified by:
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put
in interfaceBindings
- Parameters:
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name
- Name of value -
value
- Value to set. - Returns:
- Previous value for the specified key. Returns null if key was previously unset.
- Throws:
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NullPointerException
- if the name is null. -
IllegalArgumentException
- if the name is empty.
putAll
public void putAll(Map<? extends String,? extends Object> toMerge)
putAll
is implemented usingMap.putAll
.- Specified by:
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putAll
in interfaceMap<String,Object>
- Specified by:
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putAll
in interfaceBindings
- Parameters:
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toMerge
- TheMap
of values to add. - Throws:
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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.
clear
public void clear()
Removes all of the mappings from this map (optional operation). The map will be empty after this call returns.
containsKey
public boolean containsKey(Object key)
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 (key==null ? k==null : key.equals(k)). (There can be at most one such mapping.)- Specified by:
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containsKey
in interfaceMap<String,Object>
- Specified by:
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containsKey
in interfaceBindings
- Parameters:
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key
- key whose presence in this map is to be tested. - Returns:
- true if this map contains a mapping for the specified key.
- Throws:
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NullPointerException
- if key is null -
ClassCastException
- if key is not String -
IllegalArgumentException
- if key is empty String
containsValue
public boolean containsValue(Object value)
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 (value==null ? v==null : value.equals(v)). This operation will probably require time linear in the map size for most implementations of the Map interface.- Specified by:
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containsValue
in interfaceMap<String,Object>
- Parameters:
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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
entrySet
public Set<Map.Entry<String,Object>> 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 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.
get
public Object get(Object key)
Returns the value to which this map maps the specified key. Returns null if the map contains no mapping for this key. 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.More formally, if this map contains a mapping from a key k to a value v such that (key==null ? k==null : key.equals(k)), then this method returns v; otherwise it returns null. (There can be at most one such mapping.)
- Specified by:
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get
in interfaceMap<String,Object>
- Specified by:
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get
in interfaceBindings
- Parameters:
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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:
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NullPointerException
- if key is null -
ClassCastException
- if key is not String -
IllegalArgumentException
- if key is empty String
isEmpty
public boolean isEmpty()
Returns true if this map contains no key-value mappings.
keySet
public Set<String> 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 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.
remove
public Object remove(Object key)
Removes the mapping for this 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(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. (A null return can also indicate that the map previously associated null with the specified key if the implementation supports null values.) The map will not contain a mapping for the specified key once the call returns.
- Specified by:
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remove
in interfaceMap<String,Object>
- Specified by:
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remove
in interfaceBindings
- Parameters:
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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:
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NullPointerException
- if key is null -
ClassCastException
- if key is not String -
IllegalArgumentException
- if key is empty String
size
public int 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.
values
public Collection<Object> 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 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.
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