Package org.gcube.informationsystem.resourceregistry.queries.json.base.standalone

Class JsonQueryRelationSchema

java.lang.Object

org.gcube.informationsystem.resourceregistry.queries.json.base.JsonQueryElement

org.gcube.informationsystem.resourceregistry.queries.json.base.standalone.JsonQueryRelationSchema

public class JsonQueryRelationSchema
extends JsonQueryElement

Translates a JSON query subtree representing a relation Type definition (IsRelatedToSchema or ConsistsOfSchema).

Although these definitions are persisted as OrientDB edges connecting ResourceSchema vertices (source/target), queries against them are treated as flat/standalone: the query targets the relation Type definition itself (e.g. by name or property), with no traversal into its source/target entity Type definitions. Hence extending JsonQueryElement directly rather than JsonQueryERElement.

Author:

Luca Frosini (ISTI - CNR)

Field Summary

Fields inherited from class org.gcube.informationsystem.resourceregistry.queries.json.base.JsonQueryElement

accessType, alias, breadcrumb, entryPoint, fieldNamesToRemove, fieldsToEmit, jsonNode, logger, objectMapper, polymorphic, position, projection, queryParameterIndex, queryParameters, size, type

Constructor Summary

Constructors

Constructor	Description
JsonQueryRelationSchema(org.gcube.com.fasterxml.jackson.databind.JsonNode jsonQuery)	Creates a new JsonQueryRelationSchema instance for the specified JSON query subtree.

Method Summary

Modifier and Type	Method	Description
protected StringBuffer	getSpecificMatchQuery(List<JsonQueryElement> childrenBreadcrumb)	Generates the specific MATCH query snippet for this element's subclass (subclass hook).

Methods inherited from class org.gcube.informationsystem.resourceregistry.queries.json.base.JsonQueryElement

addConstraints, addFieldToEmit, createMatchQuery, createQuery, evaluateNode, generateAlias, getAlias, getAlias, getBreadcrumb, getChildrenBreadcrumb, getKey, getPosition, getQueryParameters, getScalarValue, getType, getValue, isEntryPoint, isProjection, setBreadcrumb, setEntryPoint, setPolymorphic, setPosition, setProjection, validateType, wrapMatchQuery

Methods inherited from class java.lang.Object

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

Constructor Details

JsonQueryRelationSchema

public JsonQueryRelationSchema(org.gcube.com.fasterxml.jackson.databind.JsonNode jsonQuery)
                        throws org.gcube.informationsystem.resourceregistry.api.exceptions.types.SchemaException,
org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException

Creates a new JsonQueryRelationSchema instance for the specified JSON query subtree.

Parameters:

jsonQuery - the JSON query node representing the relation Type definition

Throws:

org.gcube.informationsystem.resourceregistry.api.exceptions.types.SchemaException - if schema validation fails

org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException - on database or lookup error

Method Details

getSpecificMatchQuery

protected StringBuffer getSpecificMatchQuery(List<JsonQueryElement> childrenBreadcrumb)
                                      throws org.gcube.informationsystem.resourceregistry.api.exceptions.types.SchemaException,
org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException

Description copied from class: JsonQueryElement

Generates the specific MATCH query snippet for this element's subclass (subclass hook).

Specified by:

getSpecificMatchQuery in class JsonQueryElement

Parameters:

childrenBreadcrumb - the list of child query elements visited

Returns:

the MATCH query snippet string buffer

Throws:

org.gcube.informationsystem.resourceregistry.api.exceptions.types.SchemaException - if schema validation fails

org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException - on database error