com.fasterxml.jackson.core.json

Class JsonWriteContext

java.lang.Object

com.fasterxml.jackson.core.JsonStreamContext

com.fasterxml.jackson.core.json.JsonWriteContext

public class JsonWriteContext
extends JsonStreamContext

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

Field Summary

Fields

Modifier and Type	Field and Description
protected JsonWriteContext	_child
protected String	_currentName Name of the field of which value is to be parsed; only used for OBJECT contexts
protected Object	_currentValue
protected DupDetector	_dups
protected boolean	_gotName Marker used to indicate that we just received a name, and now expect a value
protected JsonWriteContext	_parent Parent context for this context; null for root context.
static int	STATUS_EXPECT_NAME
static int	STATUS_EXPECT_VALUE
static int	STATUS_OK_AFTER_COLON
static int	STATUS_OK_AFTER_COMMA
static int	STATUS_OK_AFTER_SPACE
static int	STATUS_OK_AS_IS

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

_index, _type, TYPE_ARRAY, TYPE_OBJECT, TYPE_ROOT

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	JsonWriteContext(int type, JsonWriteContext parent, DupDetector dups)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	appendDesc(StringBuilder sb)
JsonWriteContext	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).
JsonWriteContext	createChildArrayContext()
JsonWriteContext	createChildObjectContext()
static JsonWriteContext	createRootContext() Deprecated. Since 2.3; use method that takes argument
static JsonWriteContext	createRootContext(DupDetector dd)
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()
JsonWriteContext	getParent() Accessor for finding parent context of this context; will return null for root context.
protected JsonWriteContext	reset(int type)
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)).
String	toString() Overridden to provide developer writeable "JsonPath" representation of the context.
JsonWriteContext	withDupDetector(DupDetector dups)
int	writeFieldName(String name) Method that writer is to call before it writes a field name.
int	writeValue()

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

getCurrentIndex, getEntryCount, getTypeDesc, inArray, inObject, inRoot

Methods inherited from class java.lang.Object

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

Field Detail

STATUS_OK_AS_IS

public static final int STATUS_OK_AS_IS

See Also:

Constant Field Values

STATUS_OK_AFTER_COMMA

public static final int STATUS_OK_AFTER_COMMA

See Also:

Constant Field Values

STATUS_OK_AFTER_COLON

public static final int STATUS_OK_AFTER_COLON

See Also:

Constant Field Values

STATUS_OK_AFTER_SPACE

public static final int STATUS_OK_AFTER_SPACE

See Also:

Constant Field Values

STATUS_EXPECT_VALUE

public static final int STATUS_EXPECT_VALUE

See Also:

Constant Field Values

STATUS_EXPECT_NAME

public static final int STATUS_EXPECT_NAME

See Also:

Constant Field Values

_parent

protected final JsonWriteContext _parent

Parent context for this context; null for root context.

_dups

protected DupDetector _dups

_child

protected JsonWriteContext _child

_currentName

protected String _currentName

Name of the field of which value is to be parsed; only used for OBJECT contexts

_currentValue

protected Object _currentValue

Since:

2.5

_gotName

protected boolean _gotName

Marker used to indicate that we just received a name, and now expect a value

Constructor Detail

JsonWriteContext

protected JsonWriteContext(int type,
                JsonWriteContext parent,
                DupDetector dups)

Method Detail

reset

protected JsonWriteContext reset(int type)

withDupDetector

public JsonWriteContext 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

@Deprecated
public static JsonWriteContext createRootContext()

Deprecated. Since 2.3; use method that takes argument

createRootContext

public static JsonWriteContext createRootContext(DupDetector dd)

createChildArrayContext

public JsonWriteContext createChildArrayContext()

createChildObjectContext

public JsonWriteContext createChildObjectContext()

getParent

public final JsonWriteContext 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

getCurrentName

public final 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

clearAndGetParent

public JsonWriteContext 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()

writeFieldName

public int writeFieldName(String name)
                   throws JsonProcessingException

Method that writer is to call before it writes a field name.

Returns:

Index of the field entry (0-based)

Throws:

JsonProcessingException

writeValue

public int writeValue()

appendDesc

protected void appendDesc(StringBuilder sb)

toString

public String toString()

Overridden to provide developer writeable "JsonPath" representation of the context.

Overrides:

toString in class Object