com.fasterxml.jackson.core.json

Class DupDetector

java.lang.Object

com.fasterxml.jackson.core.json.DupDetector

public class DupDetector
extends java.lang.Object

Helper class used if JsonParser.Feature.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).

Since:

2.3

Method Summary

Modifier and Type	Method and Description
DupDetector	child()
JsonLocation	findLocation()
java.lang.Object	getSource()
boolean	isDup(java.lang.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

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

Method Detail

rootDetector

public static DupDetector rootDetector(JsonParser p)

rootDetector

public static DupDetector rootDetector(JsonGenerator g)

child

public DupDetector child()

reset

public void reset()

findLocation

public JsonLocation findLocation()

getSource

public java.lang.Object getSource()

Returns:

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

Since:

2.7

isDup

public boolean isDup(java.lang.String name)
              throws JsonParseException

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

Throws:

JsonParseException - to report possible operation problem (default implementation never throws it)