Package com.ibm.fhir.model.visitor

Class ResourceFingerprintVisitor

java.lang.Object

com.ibm.fhir.model.visitor.DefaultVisitor

com.ibm.fhir.model.visitor.PathAwareVisitor

com.ibm.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 com.ibm.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, java.lang.String 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
void	visit(java.lang.String elementName, byte[] value)
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)
void	visit(java.lang.String elementName, java.lang.Boolean value)
void	visit(java.lang.String elementName, java.lang.Integer value)
void	visit(java.lang.String elementName, java.math.BigDecimal value)
void	visit(java.lang.String elementName, java.time.LocalDate value)
void	visit(java.lang.String elementName, java.time.LocalTime value)
void	visit(java.lang.String elementName, java.time.Year value)
void	visit(java.lang.String elementName, java.time.YearMonth value)
void	visit(java.lang.String elementName, java.time.ZonedDateTime value)

Methods inherited from class com.ibm.fhir.model.visitor.PathAwareVisitor

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

Methods inherited from class com.ibm.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, 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

visit

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

Specified by:

visit in interface Visitor

Overrides:

visit in class DefaultVisitor

visit

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

Specified by:

visit in interface Visitor

Overrides:

visit in class DefaultVisitor

visit

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

Specified by:

visit in interface Visitor

Overrides:

visit in class DefaultVisitor

visit

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

Specified by:

visit in interface Visitor

Overrides:

visit in class DefaultVisitor

visit

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

Specified by:

visit in interface Visitor

Overrides:

visit in class DefaultVisitor

visit

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

Specified by:

visit in interface Visitor

Overrides:

visit in class DefaultVisitor

doVisit

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

Overrides:

doVisit in class PathAwareVisitor

visit

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

Specified by:

visit in interface Visitor

Overrides:

visit in class DefaultVisitor

visit

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

Specified by:

visit in interface Visitor

Overrides:

visit in class DefaultVisitor

visit

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

Specified by:

visit in interface Visitor

Overrides:

visit in class DefaultVisitor

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: