org.codehaus.jackson.map

类 MappingIterator<T>

java.lang.Object

org.codehaus.jackson.map.MappingIterator<T>

所有已实现的接口:

Iterator<T>

public class MappingIterator<T>
extends Object
implements Iterator<T>

Iterator exposed by ObjectMapper when binding sequence of objects. Extension is done to allow more convenient exposing of IOException (which basic Iterator does not expose)

从以下版本开始:

1.8

字段概要

字段

限定符和类型	字段和说明
protected boolean	_closeParser Flag that indicates whether input JsonParser should be closed when we are done or not; generally only called when caller did not pass JsonParser.
protected DeserializationContext	_context
protected JsonDeserializer<T>	_deserializer
protected boolean	_hasNextChecked Flag that is set when we have determined what hasNextValue() should value; reset when nextValue() is called
protected JsonParser	_parser
protected JavaType	_type
protected T	_updatedValue If not null, "value to update" instead of creating a new instance for each call.
protected static MappingIterator<?>	EMPTY_ITERATOR

构造器概要

构造器

限定符	构造器和说明
protected	MappingIterator(JavaType type, JsonParser jp, DeserializationContext ctxt, JsonDeserializer<?> deser)
protected	MappingIterator(JavaType type, JsonParser jp, DeserializationContext ctxt, JsonDeserializer<?> deser, boolean closeParser, Object valueToUpdate)

方法概要

方法

限定符和类型	方法和说明
protected static <T> MappingIterator<T>	emptyIterator()
boolean	hasNext()
boolean	hasNextValue() Equivalent of next() but one that may throw checked exceptions from Jackson due to invalid input.
T	next()
T	nextValue()
void	remove()

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

EMPTY_ITERATOR

protected static final MappingIterator<?> EMPTY_ITERATOR

_type

protected final JavaType _type

_context

protected final DeserializationContext _context

_deserializer

protected final JsonDeserializer<T> _deserializer

_parser

protected JsonParser _parser

_closeParser

protected final boolean _closeParser

Flag that indicates whether input JsonParser should be closed when we are done or not; generally only called when caller did not pass JsonParser.

_hasNextChecked

protected boolean _hasNextChecked

Flag that is set when we have determined what hasNextValue() should value; reset when nextValue() is called

_updatedValue

protected final T _updatedValue

If not null, "value to update" instead of creating a new instance for each call.

构造器详细资料

MappingIterator

protected MappingIterator(JavaType type,
               JsonParser jp,
               DeserializationContext ctxt,
               JsonDeserializer<?> deser)

MappingIterator

protected MappingIterator(JavaType type,
               JsonParser jp,
               DeserializationContext ctxt,
               JsonDeserializer<?> deser,
               boolean closeParser,
               Object valueToUpdate)

从以下版本开始:

1.9.3

方法详细资料

emptyIterator

protected static <T> MappingIterator<T> emptyIterator()

hasNext

public boolean hasNext()

指定者:

hasNext 在接口中 Iterator<T>

next

public T next()

指定者:

next 在接口中 Iterator<T>

remove

public void remove()

指定者:

remove 在接口中 Iterator<T>

hasNextValue

public boolean hasNextValue()
                     throws IOException

Equivalent of next() but one that may throw checked exceptions from Jackson due to invalid input.

抛出:

IOException

nextValue

public T nextValue()
            throws IOException

抛出:

IOException