com.fasterxml.jackson.core.json

Class JsonReadContext

java.lang.Object

com.fasterxml.jackson.core.JsonStreamContext

com.fasterxml.jackson.core.json.JsonReadContext

public final class JsonReadContext
extends JsonStreamContext

Extension of JsonStreamContext, which implements core methods needed, and also exposes more complete API to parser implementation classes.

Field Summary

Fields

Modifier and Type	Field and Description
protected JsonReadContext	_child
protected int	_columnNr
protected String	_currentName
protected Object	_currentValue
protected DupDetector	_dups
protected int	_lineNr
protected JsonReadContext	_parent Parent context for this context; null for root context.

Fields inherited from class com.fasterxml.jackson.core.JsonStreamContext

_index, _type, TYPE_ARRAY, TYPE_OBJECT, TYPE_ROOT

Constructor Summary

Constructors

Constructor and Description
JsonReadContext(JsonReadContext parent, DupDetector dups, int type, int lineNr, int colNr)

Method Summary

Methods

Modifier and Type	Method and Description
JsonReadContext	clearAndGetParent() Method that can be used to both clear the accumulated references (specifically value set with setCurrentValue(Object)) that should not be retained, and returns parent (as would getParent() do).
JsonReadContext	createChildArrayContext(int lineNr, int colNr)
JsonReadContext	createChildObjectContext(int lineNr, int colNr)
static JsonReadContext	createRootContext(DupDetector dups)
static JsonReadContext	createRootContext(int lineNr, int colNr, DupDetector dups)
boolean	expectComma()
String	getCurrentName() Method for accessing name associated with the current location.
Object	getCurrentValue() Method for accessing currently active value being used by data-binding (as the source of streaming data to write, or destination of data being read), at this level in hierarchy.
DupDetector	getDupDetector()
JsonReadContext	getParent() Accessor for finding parent context of this context; will return null for root context.
JsonLocation	getStartLocation(Object srcRef) Optional method that may be used to access starting location of this context: for example, in case of JSON `Object` context, offset at which `[` token was read or written.
boolean	hasCurrentName()
protected void	reset(int type, int lineNr, int colNr)
void	setCurrentName(String name)
void	setCurrentValue(Object v) Method to call to pass value to be returned via JsonStreamContext.getCurrentValue(); typically called indirectly through JsonParser.setCurrentValue(java.lang.Object) or JsonGenerator.setCurrentValue(java.lang.Object)).
JsonReadContext	withDupDetector(DupDetector dups)

Methods inherited from class com.fasterxml.jackson.core.JsonStreamContext

getCurrentIndex, getEntryCount, getTypeDesc, hasCurrentIndex, hasPathSegment, inArray, inObject, inRoot, pathAsPointer, pathAsPointer, toString, typeDesc

Methods inherited from class java.lang.Object

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

Field Detail

_parent

protected final JsonReadContext _parent

Parent context for this context; null for root context.

_dups

protected DupDetector _dups

_child

protected JsonReadContext _child

_currentName

protected String _currentName

_currentValue

protected Object _currentValue

Since:

2.5

_lineNr

protected int _lineNr

_columnNr

protected int _columnNr

Constructor Detail

JsonReadContext

public JsonReadContext(JsonReadContext parent,
               DupDetector dups,
               int type,
               int lineNr,
               int colNr)

Method Detail

reset

protected void reset(int type,
         int lineNr,
         int colNr)

withDupDetector

public JsonReadContext withDupDetector(DupDetector dups)

getCurrentValue

public Object getCurrentValue()

Description copied from class: JsonStreamContext

Method for accessing currently active value being used by data-binding (as the source of streaming data to write, or destination of data being read), at this level in hierarchy.

Note that "current value" is NOT populated (or used) by Streaming parser or generator; it is only used by higher-level data-binding functionality. The reason it is included here is that it can be stored and accessed hierarchically, and gets passed through data-binding.

Overrides:

getCurrentValue in class JsonStreamContext

Returns:

Currently active value, if one has been assigned.

setCurrentValue

public void setCurrentValue(Object v)

Description copied from class: JsonStreamContext

Method to call to pass value to be returned via JsonStreamContext.getCurrentValue(); typically called indirectly through JsonParser.setCurrentValue(java.lang.Object) or JsonGenerator.setCurrentValue(java.lang.Object)).

Overrides:

setCurrentValue in class JsonStreamContext

createRootContext

public static JsonReadContext createRootContext(int lineNr,
                                int colNr,
                                DupDetector dups)

createRootContext

public static JsonReadContext createRootContext(DupDetector dups)

createChildArrayContext

public JsonReadContext createChildArrayContext(int lineNr,
                                      int colNr)

createChildObjectContext

public JsonReadContext createChildObjectContext(int lineNr,
                                       int colNr)

getCurrentName

public String getCurrentName()

Description copied from class: JsonStreamContext

Method for accessing name associated with the current location. Non-null for FIELD_NAME and value events that directly follow field names; null for root level and array values.

Specified by:

getCurrentName in class JsonStreamContext

hasCurrentName

public boolean hasCurrentName()

Overrides:

hasCurrentName in class JsonStreamContext

getParent

public JsonReadContext getParent()

Description copied from class: JsonStreamContext

Accessor for finding parent context of this context; will return null for root context.

Specified by:

getParent in class JsonStreamContext

getStartLocation

public JsonLocation getStartLocation(Object srcRef)

Description copied from class: JsonStreamContext

Optional method that may be used to access starting location of this context: for example, in case of JSON `Object` context, offset at which `[` token was read or written. Often used for error reporting purposes. Implementations that do not keep track of such location are expected to return JsonLocation.NA; this is what the default implementation does.

Overrides:

getStartLocation in class JsonStreamContext

Returns:

Location pointing to the point where the context start marker was found (or written); never `null`.

NOTE: demoted from JsonReadContext in 2.9, to allow use for "non-standard" read contexts.

clearAndGetParent

public JsonReadContext clearAndGetParent()

Method that can be used to both clear the accumulated references (specifically value set with setCurrentValue(Object)) that should not be retained, and returns parent (as would getParent() do). Typically called when closing the active context when encountering JsonToken.END_ARRAY or JsonToken.END_OBJECT.

Since:

2.7

getDupDetector

public DupDetector getDupDetector()

expectComma

public boolean expectComma()

setCurrentName

public void setCurrentName(String name)
                    throws JsonProcessingException

Throws:

JsonProcessingException