Top Description Fields Constructors Methods
com.fasterxml.jackson.jr.ob.impl

public Class DeferredMap

extends AbstractMap<String, Object>
Class Inheritance
Imports
java.util.*
A specialized java.util.Map implementation that will collect entries during building, but only materialize full lookup structure when needed; that is, actual building of hash lookup is deferred.

Inspired by lazily initialized Map used by Boon library.

Field Summary

Modifier and TypeField and Description
private int
_end

private Object[]
_entries

private Map<String, Object>
_map

private final boolean
_ordered

Constructor Summary

AccessConstructor and Description
public
DeferredMap(boolean ordered)

public
DeferredMap(boolean ordered, int initialSize)

Method Summary

Modifier and TypeMethod and Description
protected Map<String, Object>
_buildMap(int expSize)

private final int
_newSize(int size)

protected void
buildIfNeeded()

public void
clear()

Overrides java.util.AbstractMap.clear.

Implements java.util.Map.clear.

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

protected Object
clone()

Overrides java.util.AbstractMap.clone.

Returns a shallow copy of this AbstractMap instance: the keys and values themselves are not cloned.

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

Overrides java.util.AbstractMap.containsKey.

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)

Overrides java.util.AbstractMap.containsValue.

Implements java.util.Map.containsValue.

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

public Set<Map.Entry<String, Object>>
entrySet()

Implements abstract java.util.AbstractMap.entrySet.

Implements java.util.Map.entrySet.

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

public boolean
equals(Object
object to be compared for equality with this map
other)

Overrides java.util.AbstractMap.equals.

Implements java.util.Map.equals.

Compares the specified object with this map for equality.

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

Overrides java.util.AbstractMap.get.

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 int
hashCode()

Overrides java.util.AbstractMap.hashCode.

Implements java.util.Map.hashCode.

Returns the hash code value for this map.

public boolean
isEmpty()

Overrides java.util.AbstractMap.isEmpty.

Implements java.util.Map.isEmpty.

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

public Set<String>
keySet()

Overrides java.util.AbstractMap.keySet.

Implements java.util.Map.keySet.

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

public Object
put(String
key with which the specified value is to be associated
key, Object
value to be associated with the specified key
value)

Overrides java.util.AbstractMap.put.

Implements java.util.Map.put.

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

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

Overrides java.util.AbstractMap.remove.

Implements java.util.Map.remove.

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

public int
size()

Overrides java.util.AbstractMap.size.

Implements java.util.Map.size.

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

public String
toString()

Overrides java.util.AbstractMap.toString.

Returns a string representation of this map.

public Collection<Object>
values()

Overrides java.util.AbstractMap.values.

Implements java.util.Map.values.

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

Inherited from java.util.AbstractMap:
putAll

Field Detail

_endback to summary
private int _end
_entriesback to summary
private Object[] _entries
_mapback to summary
private Map<String, Object> _map
_orderedback to summary
private final boolean _ordered

Constructor Detail

DeferredMapback to summary
public DeferredMap(boolean ordered)
DeferredMapback to summary
public DeferredMap(boolean ordered, int initialSize)

Method Detail

_buildMapback to summary
protected Map<String, Object> _buildMap(int expSize)
_newSizeback to summary
private final int _newSize(int size)
buildIfNeededback to summary
protected void buildIfNeeded()
clearback to summary
public void clear()

Overrides java.util.AbstractMap.clear.

Implements java.util.Map.clear.

Doc from java.util.AbstractMap.clear.

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

Annotations
@Override
cloneback to summary
protected Object clone() throws CloneNotSupportedException

Overrides java.util.AbstractMap.clone.

Doc from java.util.AbstractMap.clone.

Returns a shallow copy of this AbstractMap instance: the keys and values themselves are not cloned.

Returns:Object

a shallow copy of this map

Annotations
@Override
Exceptions
CloneNotSupportedException:

Doc from java.lang.Object.clone.

if the object's class does not support the Cloneable interface. Subclasses that override the clone method can also throw this exception to indicate that an instance cannot be cloned.

containsKeyback to summary
public boolean containsKey(Object key)

Overrides java.util.AbstractMap.containsKey.

Implements java.util.Map.containsKey.

Doc from java.util.AbstractMap.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

Doc from java.util.Map.containsKey.

key whose presence in this map is to be tested

Returns:boolean

Doc from java.util.Map.containsKey.

true if this map contains a mapping for the specified key

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

Overrides java.util.AbstractMap.containsValue.

Implements java.util.Map.containsValue.

Doc from java.util.AbstractMap.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

Doc from java.util.Map.containsValue.

value whose presence in this map is to be tested

Returns:boolean

Doc from java.util.Map.containsValue.

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

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

Implements abstract java.util.AbstractMap.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:Set<Map.Entry<String, Object>>

a set view of the mappings contained in this map

Annotations
@Override
equalsback to summary
public boolean equals(Object other)

Overrides java.util.AbstractMap.equals.

Implements java.util.Map.equals.

Doc from java.util.AbstractMap.equals.

Compares the specified object with this map for equality. Returns true if the given object is also a map and the two maps represent the same mappings. More formally, two maps m1 and m2 represent the same mappings if m1.entrySet().equals(m2.entrySet()). This ensures that the equals method works properly across different implementations of the Map interface.

Parameters
other:Object

object to be compared for equality with this map

Returns:boolean

true if the specified object is equal to this map

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

Overrides java.util.AbstractMap.get.

Implements java.util.Map.get.

Doc from java.util.AbstractMap.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

Doc from java.util.Map.get.

the key whose associated value is to be returned

Returns:Object

Doc from java.util.Map.get.

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

Annotations
@Override
hashCodeback to summary
public int hashCode()

Overrides java.util.AbstractMap.hashCode.

Implements java.util.Map.hashCode.

Doc from java.util.AbstractMap.hashCode.

Returns the hash code value for this map. The hash code of a map is defined to be the sum of the hash codes of each entry in the map's entrySet() view. This ensures that m1.equals(m2) implies that m1.hashCode()==m2.hashCode() for any two maps m1 and m2, as required by the general contract of Object#hashCode.

Returns:int

the hash code value for this map

Annotations
@Override
isEmptyback to summary
public boolean isEmpty()

Overrides java.util.AbstractMap.isEmpty.

Implements java.util.Map.isEmpty.

Doc from java.util.AbstractMap.isEmpty.

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

Returns:boolean

Doc from java.util.Map.isEmpty.

true if this map contains no key-value mappings

Annotations
@Override
keySetback to summary
public Set<String> keySet()

Overrides java.util.AbstractMap.keySet.

Implements java.util.Map.keySet.

Doc from java.util.AbstractMap.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:Set<String>

Doc from java.util.Map.keySet.

a set view of the keys contained in this map

Annotations
@Override
putback to summary
public Object put(String key, Object value)

Overrides java.util.AbstractMap.put.

Implements java.util.Map.put.

Doc from java.util.AbstractMap.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:String

Doc from java.util.Map.put.

key with which the specified value is to be associated

value:Object

Doc from java.util.Map.put.

value to be associated with the specified key

Returns:Object

Doc from java.util.Map.put.

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
removeback to summary
public Object remove(Object key)

Overrides java.util.AbstractMap.remove.

Implements java.util.Map.remove.

Doc from java.util.AbstractMap.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

Doc from java.util.Map.remove.

key whose mapping is to be removed from the map

Returns:Object

Doc from java.util.Map.remove.

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

Annotations
@Override
sizeback to summary
public int size()

Overrides java.util.AbstractMap.size.

Implements java.util.Map.size.

Doc from java.util.AbstractMap.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

Doc from java.util.Map.size.

the number of key-value mappings in this map

Annotations
@Override
toStringback to summary
public String toString()

Overrides java.util.AbstractMap.toString.

Doc from java.util.AbstractMap.toString.

Returns a string representation of this map. The string representation consists of a list of key-value mappings in the order returned by the map's entrySet view's iterator, enclosed in braces ("{}"). Adjacent mappings are separated by the characters ", " (comma and space). Each key-value mapping is rendered as the key followed by an equals sign ("=") followed by the associated value. Keys and values are converted to strings as by String#valueOf(Object).

Returns:String

a string representation of this map

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

Overrides java.util.AbstractMap.values.

Implements java.util.Map.values.

Doc from java.util.AbstractMap.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:Collection<Object>

Doc from java.util.Map.values.

a collection view of the values contained in this map

Annotations
@Override