Package cz.cvut.kbss.jsonld.serialization

Class JsonLdTreeBuilder

java.lang.Object

cz.cvut.kbss.jsonld.serialization.JsonLdTreeBuilder

All Implemented Interfaces:

InstanceVisitor

public class JsonLdTreeBuilder
extends Object
implements InstanceVisitor

Builds an abstract representation of a JSON-LD tree, which is a result of object graph traversal by ObjectGraphTraverser.

Constructor Summary

Constructors

Constructor	Description
JsonLdTreeBuilder(ValueSerializers serializers, JsonLdContextFactory jsonLdContextFactory)

Method Summary

Modifier and Type	Method	Description
void	closeCollection(SerializationContext<?> ctx)	Called after the last collection item is processed.
void	closeObject(SerializationContext<?> ctx)	Called when the graph traverser is done with traversing the current instance.
CompositeNode<?>	getTreeRoot()
void	openCollection(SerializationContext<? extends Collection<?>> ctx)	Called when a collection is encountered by the object traverser.
void	openObject(SerializationContext<?> ctx)	Called when a new instance is discovered by the object graph traverser.
void	visitAttribute(SerializationContext<?> ctx)	Called when an attribute is processed by the object graph traverser.
void	visitIdentifier(SerializationContext<String> idCtx)	Called when the identifier of an instance (JSON-LD @id attribute) is encountered.
void	visitIndividual(SerializationContext<?> ctx)	Visits an object that represents an individual, without any additional attributes.
boolean	visitObject(SerializationContext<?> ctx)	Visits the instance represented by the specified context.
void	visitTypes(SerializationContext<Set<String>> typesCtx)	Called when the types of an instance (JSON-LD @type attribute) are serialized.

Methods inherited from class java.lang.Object

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

Constructor Details

JsonLdTreeBuilder

public JsonLdTreeBuilder(ValueSerializers serializers,
 JsonLdContextFactory jsonLdContextFactory)

Method Details

visitIndividual

public void visitIndividual(SerializationContext<?> ctx)

Description copied from interface: InstanceVisitor

Visits an object that represents an individual, without any additional attributes. This can be an identifier-based attribute value (e.g., URI), or an enum constant mapped to an individual.

Specified by:

visitIndividual in interface InstanceVisitor

Parameters:

ctx - Current serialization context

visitObject

public boolean visitObject(SerializationContext<?> ctx)

Description copied from interface: InstanceVisitor

Visits the instance represented by the specified context.

Called before a new instance is open by the object graph traverser.

Specified by:

visitObject in interface InstanceVisitor

Parameters:

ctx - Current serialization context

Returns:

Whether the object should be processed or not

See Also:

• InstanceVisitor.openObject(SerializationContext)

openObject

public void openObject(SerializationContext<?> ctx)

Description copied from interface: InstanceVisitor

Called when a new instance is discovered by the object graph traverser.

The instance attributes will be processed immediately after this method returns.

Specified by:

openObject in interface InstanceVisitor

Parameters:

ctx - Current serialization context

closeObject

public void closeObject(SerializationContext<?> ctx)

Description copied from interface: InstanceVisitor

Called when the graph traverser is done with traversing the current instance.

Specified by:

closeObject in interface InstanceVisitor

Parameters:

ctx - Current serialization context

See Also:

• InstanceVisitor.openObject(SerializationContext)

visitIdentifier

public void visitIdentifier(SerializationContext<String> idCtx)

Description copied from interface: InstanceVisitor

Called when the identifier of an instance (JSON-LD @id attribute) is encountered.

This may be invoked out of order, at the beginning of processing an object.

Specified by:

visitIdentifier in interface InstanceVisitor

Parameters:

idCtx - Current serialization context

visitTypes

public void visitTypes(SerializationContext<Set<String>> typesCtx)

Description copied from interface: InstanceVisitor

Called when the types of an instance (JSON-LD @type attribute) are serialized.

Specified by:

visitTypes in interface InstanceVisitor

Parameters:

typesCtx - Current serialization context

visitAttribute

public void visitAttribute(SerializationContext<?> ctx)

Description copied from interface: InstanceVisitor

Called when an attribute is processed by the object graph traverser.

Note that identifiers (Id) and types (Types) are processed separately and are not visited as attributes. Also, when processing Properties, this method is invoked for each property in the map.

Specified by:

visitAttribute in interface InstanceVisitor

Parameters:

ctx - Current serialization context

openCollection

public void openCollection(SerializationContext<? extends Collection<?>> ctx)

Description copied from interface: InstanceVisitor

Called when a collection is encountered by the object traverser.

This can be either when a top-level collection is discovered, or when an object's attribute is a collection.

Specified by:

openCollection in interface InstanceVisitor

Parameters:

ctx - Current serialization context

closeCollection

public void closeCollection(SerializationContext<?> ctx)

Description copied from interface: InstanceVisitor

Called after the last collection item is processed.

Specified by:

closeCollection in interface InstanceVisitor

Parameters:

ctx - Current serialization context

See Also:

• InstanceVisitor.openCollection(SerializationContext)

getTreeRoot

public CompositeNode<?> getTreeRoot()