Package org.linuxforhealth.fhir.model.visitor

Class ResourceFingerprintVisitor

java.lang.Object

org.linuxforhealth.fhir.model.visitor.DefaultVisitor

org.linuxforhealth.fhir.model.visitor.PathAwareVisitor

org.linuxforhealth.fhir.model.visitor.ResourceFingerprintVisitor

All Implemented Interfaces:

Visitor

public class ResourceFingerprintVisitor
extends PathAwareVisitor

Compute a cryptographic hash of the visited nodes, skipping those which may be altered by the persistence layer.

Field Summary

Fields inherited from class org.linuxforhealth.fhir.model.visitor.DefaultVisitor

visitChildren

Constructor Summary

Constructors

Constructor	Description
ResourceFingerprintVisitor()	Public constructor.
ResourceFingerprintVisitor(byte[] salt)	Public constructor.
ResourceFingerprintVisitor(SaltHash baseline)	Public constructor.

Method Summary

Modifier and Type	Method	Description
void	doVisit(java.lang.String elementName, byte[] value)
void	doVisit(java.lang.String elementName, java.lang.Boolean value)
void	doVisit(java.lang.String elementName, java.lang.Integer value)
void	doVisit(java.lang.String elementName, java.lang.String value)
void	doVisit(java.lang.String elementName, java.math.BigDecimal value)
void	doVisit(java.lang.String elementName, java.time.LocalDate value)
void	doVisit(java.lang.String elementName, java.time.LocalTime value)
void	doVisit(java.lang.String elementName, java.time.Year value)
void	doVisit(java.lang.String elementName, java.time.YearMonth value)
void	doVisit(java.lang.String elementName, java.time.ZonedDateTime value)
protected void	doVisitStart(java.lang.String elementName, int elementIndex, Resource resource)
SaltHash	getSaltAndHash()	Compute the digest and return the result along with the salt that was used
protected boolean	includePath()	Test whether or not the current path value should be included in the fingerprint
protected void	updateDigest(java.lang.String name, java.lang.String value)	Update the digest with the name/value pair
boolean	visit(java.lang.String elementName, int index, Instant value)	Delegates to #visit(elementName, elementIndex, Element)
boolean	visit(java.lang.String elementName, int index, String value)	Delegates to #visit(elementName, elementIndex, Element)

Methods inherited from class org.linuxforhealth.fhir.model.visitor.PathAwareVisitor

doVisitEnd, doVisitEnd, doVisitStart, getPath, reset, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visitEnd, visitEnd, visitStart, visitStart

Methods inherited from class org.linuxforhealth.fhir.model.visitor.DefaultVisitor

postVisit, postVisit, preVisit, preVisit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visitEnd, visitStart

Methods inherited from class java.lang.Object

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

Constructor Detail

ResourceFingerprintVisitor

public ResourceFingerprintVisitor(byte[] salt)

Public constructor. Uses the given salt

Parameters:

salt -

ResourceFingerprintVisitor

public ResourceFingerprintVisitor(SaltHash baseline)

Public constructor. Uses the salt from the given SaltHash Preferred, to avoid confusion between salt and hash

Parameters:

baseline -

ResourceFingerprintVisitor

public ResourceFingerprintVisitor()

Public constructor. Generates a new salt

Method Detail

getSaltAndHash

public SaltHash getSaltAndHash()

Compute the digest and return the result along with the salt that was used

Returns:

doVisitStart

protected void doVisitStart(java.lang.String elementName,
                            int elementIndex,
                            Resource resource)

Overrides:

doVisitStart in class PathAwareVisitor

visit

public boolean visit(java.lang.String elementName,
                     int index,
                     String value)

Description copied from class: DefaultVisitor

Delegates to #visit(elementName, elementIndex, Element)

Specified by:

visit in interface Visitor

Overrides:

visit in class DefaultVisitor

Returns:

true if the children of this string should be visited; otherwise false

visit

public boolean visit(java.lang.String elementName,
                     int index,
                     Instant value)

Description copied from class: DefaultVisitor

Delegates to #visit(elementName, elementIndex, Element)

Specified by:

visit in interface Visitor

Overrides:

visit in class DefaultVisitor

Returns:

true if the children of this instant should be visited; otherwise false

doVisit

public void doVisit(java.lang.String elementName,
                    byte[] value)

Overrides:

doVisit in class PathAwareVisitor

doVisit

public void doVisit(java.lang.String elementName,
                    java.math.BigDecimal value)

Overrides:

doVisit in class PathAwareVisitor

doVisit

public void doVisit(java.lang.String elementName,
                    java.lang.Boolean value)

Overrides:

doVisit in class PathAwareVisitor

doVisit

public void doVisit(java.lang.String elementName,
                    java.lang.Integer value)

Overrides:

doVisit in class PathAwareVisitor

doVisit

public void doVisit(java.lang.String elementName,
                    java.time.LocalDate value)

Overrides:

doVisit in class PathAwareVisitor

doVisit

public void doVisit(java.lang.String elementName,
                    java.time.LocalTime value)

Overrides:

doVisit in class PathAwareVisitor

doVisit

public void doVisit(java.lang.String elementName,
                    java.lang.String value)

Overrides:

doVisit in class PathAwareVisitor

doVisit

public void doVisit(java.lang.String elementName,
                    java.time.Year value)

Overrides:

doVisit in class PathAwareVisitor

doVisit

public void doVisit(java.lang.String elementName,
                    java.time.YearMonth value)

Overrides:

doVisit in class PathAwareVisitor

doVisit

public void doVisit(java.lang.String elementName,
                    java.time.ZonedDateTime value)

Overrides:

doVisit in class PathAwareVisitor

updateDigest

protected void updateDigest(java.lang.String name,
                            java.lang.String value)

Update the digest with the name/value pair

Parameters:

name -

value -

includePath

protected boolean includePath()

Test whether or not the current path value should be included in the fingerprint

Returns: