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

Class JsonQueryContext

java.lang.Object

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

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

public class JsonQueryContext
extends JsonQueryElement

Translates a JSON query subtree representing a Context entity.

Like QueryTemplate, a Context is a flat, standalone entity with no graph relations to traverse in the sense the JSON Query engine cares about — it is always the entry point of the query, hence extending JsonQueryElement directly rather than JsonQueryERElement. (Parent/child Context links exist, but are a distinct hierarchy-navigation concern handled by ContextRepository, not by graph traversal in this query engine.)

Lives in the standalone package rather than entities: Context is its own top-level AccessType category, not an ENTITY (Resource/Facet), so grouping it alongside JsonQueryResource/JsonQueryFacet would misrepresent its taxonomy — the same category error originally made with the ER-element inheritance.

Context.PARENT_PROPERTY and Context.CHILDREN_PROPERTY are excluded from generic property constraint evaluation: they are complex/nested structures, not simple scalar filters. Context.HISTORY can neither be filtered on nor projected: the history of a Context is served by its dedicated endpoint only. Filterable fields include name, path, state, effectiveState, and standard base fields (e.g. metadata.createdBy).

Author:

Luca Frosini (ISTI - CNR)

Field Summary

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

accessType, alias, BACKEND_LINK_FIELD_PREFIXES, BACKEND_LINK_FIELDS, BACKEND_TYPE_NAME_FIELD, breadcrumb, CREATED_BY_PATH, declaredPropertyResolver, ELEMENT_INDEX_PATTERN, entryPoint, FALSE_CONDITION, FIELD_NAME_PATTERN, fieldNamesToRemove, fieldsToEmit, IS_NULL, jsonNode, LAST_UPDATE_BY_PATH, logger, maskMetadata, objectMapper, operandValidator, OPERATOR_PREFIX, polymorphic, position, projection, queryParameterIndex, queryParameters, RECORD_ATTRIBUTE_PREFIX, size, type, TYPE_NAME_FIELD, unqueryableFields

Constructor Summary

Constructors

Constructor	Description
JsonQueryContext(org.gcube.com.fasterxml.jackson.databind.JsonNode jsonQuery)	Creates a new JsonQueryContext 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

addComparisonConstraint, addConstraints, addFieldToEmit, addLogicalConstraints, createMatchQuery, createQuery, evaluateNode, generateAlias, getAlias, getAlias, getBreadcrumb, getChildrenBreadcrumb, getFieldOperand, getFieldReference, getKey, getPosition, getPropertyDomain, getQueryParameters, getRequiredType, getScalarValue, getScalarValue, getType, getValue, isEntryPoint, isProjection, isSensitiveField, resolveFieldName, setBreadcrumb, setEntryPoint, setMaskMetadata, setPolymorphic, setPosition, setProjection, validateEmittedField, validateLogicalCondition, validateType, wrapMatchQuery

Methods inherited from class java.lang.Object

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

Constructor Details

JsonQueryContext

public JsonQueryContext(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 JsonQueryContext instance for the specified JSON query subtree.

Parameters:

jsonQuery - the JSON query node representing the context

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