Module tools.jackson.core

Package tools.jackson.core.json

Class DupDetector

java.lang.Object

tools.jackson.core.json.DupDetector

public class DupDetector
extends Object

Helper class used if StreamReadFeature.STRICT_DUPLICATE_DETECTION is enabled. Optimized to try to limit memory usage and processing overhead for smallest entries, but without adding trashing (immutable objects would achieve optimal memory usage but lead to significant number of discarded temp objects for scopes with large number of entries). Another consideration is trying to limit actual number of compiled classes as it contributes significantly to overall jar size (due to linkage etc).

Field Summary

Fields

Modifier and Type	Field	Description
protected String	_firstName
protected String	_secondName
protected HashSet<String>	_seen	Lazily constructed set of names already seen within this context.
protected final Object	_source	We need to store a back-reference here to parser/generator.

Method Summary

Modifier and Type	Method	Description
DupDetector	child()
TokenStreamLocation	findLocation()
Object	getSource()
boolean	isDup(String name)	Method called to check whether a newly encountered property name would be a duplicate within this context, and if not, update the state to remember having seen the property name for checking more property names
void	reset()
static DupDetector	rootDetector(JsonGenerator g)
static DupDetector	rootDetector(JsonParser p)

Methods inherited from class java.lang.Object

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

Field Details

_source

protected final Object _source

We need to store a back-reference here to parser/generator.

_firstName

protected String _firstName

_secondName

protected String _secondName

_seen

protected HashSet<String> _seen

Lazily constructed set of names already seen within this context.

Method Details

rootDetector

public static DupDetector rootDetector(JsonParser p)

rootDetector

public static DupDetector rootDetector(JsonGenerator g)

child

public DupDetector child()

reset

public void reset()

findLocation

public TokenStreamLocation findLocation()

getSource

public Object getSource()

Returns:

Source object (parser / generator) used to construct this detector

isDup

public boolean isDup(String name)

Method called to check whether a newly encountered property name would be a duplicate within this context, and if not, update the state to remember having seen the property name for checking more property names

Parameters:

name - Property seen

Returns:

True if the property had already been seen before in this context