DeserializationContext (Jackson JSON Processor)

java.lang.Object
- org.codehaus.jackson.map.DeserializationContext

直接已知子类:

StdDeserializationContext
```
public abstract class DeserializationContext
extends Object
```
Context for deserialization process. Used to allow passing in configuration settings and reusable temporary objects (scrap arrays, containers).

字段概要

字段
限定符和类型字段和说明

protected DeserializationConfig _config

protected int _featureFlags

字段
限定符和类型	字段和说明
`protected DeserializationConfig`	`_config`
`protected int`	`_featureFlags`

构造器概要

构造器
限定符构造器和说明

protected DeserializationContext(DeserializationConfig config)

构造器
限定符	构造器和说明
`protected`	`DeserializationContext(DeserializationConfig config)`

方法概要

方法
限定符和类型	方法和说明
`abstract Calendar`	`constructCalendar(Date d)` Convenience method for constructing Calendar instance set to specified time, to be modified and used by caller.
`JavaType`	`constructType(Class<?> cls)`
`abstract Object`	`findInjectableValue(Object valueId, BeanProperty forProperty, Object beanInstance)`
`abstract ArrayBuilders`	`getArrayBuilders()` Method for accessing object useful for building arrays of primitive types (such as int[]).
`Base64Variant`	`getBase64Variant()` Convenience method for accessing the default Base64 encoding used for decoding base64 encoded binary content.
`DeserializationConfig`	`getConfig()` Method for accessing configuration setting object for currently active deserialization.
`DeserializerProvider`	`getDeserializerProvider()` Returns provider that can be used for dynamically locating other deserializers during runtime.
`JsonNodeFactory`	`getNodeFactory()`
`abstract JsonParser`	`getParser()` Accessor for getting access to the underlying JSON parser used for deserialization.
`TypeFactory`	`getTypeFactory()`
`abstract boolean`	`handleUnknownProperty(JsonParser jp, JsonDeserializer<?> deser, Object instanceOrClass, String propName)` Method deserializers can call to inform configured `DeserializationProblemHandler`s of an unrecognized property.
`abstract JsonMappingException`	`instantiationException(Class<?> instClass, String msg)`
`abstract JsonMappingException`	`instantiationException(Class<?> instClass, Throwable t)` Helper method for constructing instantiation exception for specified type, to indicate problem with physically constructing instance of specified class (missing constructor, exception from constructor)
`boolean`	`isEnabled(DeserializationConfig.Feature feat)` Convenience method for checking whether specified on/off feature is enabled
`abstract ObjectBuffer`	`leaseObjectBuffer()` Method that can be used to get access to a reusable ObjectBuffer, useful for efficiently constructing Object arrays and Lists.
`abstract JsonMappingException`	`mappingException(Class<?> targetClass)` Helper method for constructing generic mapping exception for specified type
`abstract JsonMappingException`	`mappingException(Class<?> targetClass, JsonToken t)`
`JsonMappingException`	`mappingException(String message)` Helper method for constructing generic mapping exception with specified message and current location information
`abstract Date`	`parseDate(String dateStr)` Convenience method for parsing a Date from given String, using currently configured date format (accessed using `MapperConfig.getDateFormat()`).
`abstract void`	`returnObjectBuffer(ObjectBuffer buf)` Method to call to return object buffer previously leased with `leaseObjectBuffer()`.
`abstract JsonMappingException`	`unknownFieldException(Object instanceOrClass, String fieldName)` Helper method for constructing exception to indicate that JSON Object field name did not map to a known property of type being deserialized.
`abstract JsonMappingException`	`unknownTypeException(JavaType baseType, String id)` Helper method for constructing exception to indicate that given type id (parsed from JSON) could not be converted to a Java type.
`abstract JsonMappingException`	`weirdKeyException(Class<?> keyClass, String keyValue, String msg)` Helper method for constructing exception to indicate that given JSON Object field name was not in format to be able to deserialize specified key type.
`abstract JsonMappingException`	`weirdNumberException(Class<?> instClass, String msg)` Helper method for constructing exception to indicate that input JSON Number was not suitable for deserializing into given type.
`abstract JsonMappingException`	`weirdStringException(Class<?> instClass, String msg)` Helper method for constructing exception to indicate that input JSON String was not in recognized format for deserializing into given type.
`abstract JsonMappingException`	`wrongTokenException(JsonParser jp, JsonToken expToken, String msg)` Helper method for indicating that the current token was expected to be another token.

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
  - _config
```
protected final DeserializationConfig _config
```
  - _featureFlags
```
protected final int _featureFlags
```
    从以下版本开始:
    
    1.7
- 构造器详细资料
  - DeserializationContext
```
protected DeserializationContext(DeserializationConfig config)
```
- 方法详细资料
  - getConfig
```
public DeserializationConfig getConfig()
```
    Method for accessing configuration setting object for currently active deserialization.
  - getDeserializerProvider
```
public DeserializerProvider getDeserializerProvider()
```
    Returns provider that can be used for dynamically locating other deserializers during runtime.
    
    从以下版本开始:
    
    1.5
  - isEnabled
```
public boolean isEnabled(DeserializationConfig.Feature feat)
```
    Convenience method for checking whether specified on/off feature is enabled
  - getBase64Variant
```
public Base64Variant getBase64Variant()
```
    Convenience method for accessing the default Base64 encoding used for decoding base64 encoded binary content. Same as calling:
```
  getConfig().getBase64Variant();
```
  - getParser
```
public abstract JsonParser getParser()
```
    Accessor for getting access to the underlying JSON parser used for deserialization.
  - getNodeFactory
```
public final JsonNodeFactory getNodeFactory()
```
  - constructType
```
public JavaType constructType(Class<?> cls)
```
    从以下版本开始:
    
    1.8
  - getTypeFactory
```
public TypeFactory getTypeFactory()
```
    从以下版本开始:
    
    1.9
  - findInjectableValue
```
public abstract Object findInjectableValue(Object valueId,
                         BeanProperty forProperty,
                         Object beanInstance)
```
    从以下版本开始:
    
    1.9
  - leaseObjectBuffer
```
public abstract ObjectBuffer leaseObjectBuffer()
```
    Method that can be used to get access to a reusable ObjectBuffer, useful for efficiently constructing Object arrays and Lists. Note that leased buffers should be returned once deserializer is done, to allow for reuse during same round of deserialization.
  - returnObjectBuffer
```
public abstract void returnObjectBuffer(ObjectBuffer buf)
```
    Method to call to return object buffer previously leased with leaseObjectBuffer().
    
    参数:
    buf - Returned object buffer
  - getArrayBuilders
```
public abstract ArrayBuilders getArrayBuilders()
```
    Method for accessing object useful for building arrays of primitive types (such as int[]).
  - parseDate
```
public abstract Date parseDate(String dateStr)
                        throws IllegalArgumentException
```
    Convenience method for parsing a Date from given String, using currently configured date format (accessed using MapperConfig.getDateFormat()).
    Implementation will handle thread-safety issues related to date formats such that first time this method is called, date format is cloned, and cloned instance will be retained for use during this deserialization round.
    
    抛出:
    
    IllegalArgumentException
  - constructCalendar
```
public abstract Calendar constructCalendar(Date d)
```
    Convenience method for constructing Calendar instance set to specified time, to be modified and used by caller.
  - handleUnknownProperty
```
public abstract boolean handleUnknownProperty(JsonParser jp,
                            JsonDeserializer<?> deser,
                            Object instanceOrClass,
                            String propName)
                                       throws IOException,
                                              JsonProcessingException
```
    Method deserializers can call to inform configured DeserializationProblemHandlers of an unrecognized property.
    
    返回:
    True if there was a configured problem handler that was able to handle the proble
    
    抛出:
    
    IOException
    
    JsonProcessingException
    从以下版本开始:
    
    1.5
  - mappingException
```
public abstract JsonMappingException mappingException(Class<?> targetClass)
```
    Helper method for constructing generic mapping exception for specified type
  - mappingException
```
public abstract JsonMappingException mappingException(Class<?> targetClass,
                                    JsonToken t)
```
    从以下版本开始:
    
    1.9
  - mappingException
```
public JsonMappingException mappingException(String message)
```
    Helper method for constructing generic mapping exception with specified message and current location information
    
    从以下版本开始:
    
    1.7
  - instantiationException
```
public abstract JsonMappingException instantiationException(Class<?> instClass,
                                          Throwable t)
```
    Helper method for constructing instantiation exception for specified type, to indicate problem with physically constructing instance of specified class (missing constructor, exception from constructor)
  - instantiationException
```
public abstract JsonMappingException instantiationException(Class<?> instClass,
                                          String msg)
```
  - weirdStringException
```
public abstract JsonMappingException weirdStringException(Class<?> instClass,
                                        String msg)
```
    Helper method for constructing exception to indicate that input JSON String was not in recognized format for deserializing into given type.
  - weirdNumberException
```
public abstract JsonMappingException weirdNumberException(Class<?> instClass,
                                        String msg)
```
    Helper method for constructing exception to indicate that input JSON Number was not suitable for deserializing into given type.
  - weirdKeyException
```
public abstract JsonMappingException weirdKeyException(Class<?> keyClass,
                                     String keyValue,
                                     String msg)
```
    Helper method for constructing exception to indicate that given JSON Object field name was not in format to be able to deserialize specified key type.
  - wrongTokenException
```
public abstract JsonMappingException wrongTokenException(JsonParser jp,
                                       JsonToken expToken,
                                       String msg)
```
    Helper method for indicating that the current token was expected to be another token.
  - unknownFieldException
```
public abstract JsonMappingException unknownFieldException(Object instanceOrClass,
                                         String fieldName)
```
    Helper method for constructing exception to indicate that JSON Object field name did not map to a known property of type being deserialized.
    
    参数:
    instanceOrClass - Either value being populated (if one has been instantiated), or Class that indicates type that would be (or have been) instantiated
  - unknownTypeException
```
public abstract JsonMappingException unknownTypeException(JavaType baseType,
                                        String id)
```
    Helper method for constructing exception to indicate that given type id (parsed from JSON) could not be converted to a Java type.
    
    从以下版本开始:
    
    1.5

类 DeserializationContext

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

_config

_featureFlags

构造器详细资料

DeserializationContext

方法详细资料

getConfig

getDeserializerProvider

isEnabled

getBase64Variant

getParser

getNodeFactory

constructType

getTypeFactory

findInjectableValue

leaseObjectBuffer

returnObjectBuffer

getArrayBuilders

parseDate

constructCalendar

handleUnknownProperty

mappingException

mappingException

mappingException

instantiationException

instantiationException

weirdStringException

weirdNumberException

weirdKeyException

wrongTokenException

unknownFieldException

unknownTypeException