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

Class JsonQueryQueryTemplate

java.lang.Object

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

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

public class JsonQueryQueryTemplate
extends JsonQueryElement

Translates a JSON query subtree representing a QueryTemplate entity.

A QueryTemplate is a flat, standalone entity with no graph relations to traverse: it is always the entry point of the query, never nested inside (nor traversing into) another query element — hence extending JsonQueryElement directly rather than JsonQueryERElement, which is reserved for Resources/Facets/Relations that actually participate in graph traversal.

Lives in the standalone package rather than entities: QueryTemplate 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so grouping it alongside JsonQueryResource/JsonQueryFacet would misrepresent its taxonomy — the same category error originally made with the ER-element inheritance.

QueryTemplate.TEMPLATE_PROPERTY and QueryTemplate.TEMPLATE_VARIABLES_PROPERTY are stored as opaque JSON strings rather than structured documents, so they are excluded from generic property constraint evaluation (matching only name/description and standard base fields).

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
JsonQueryQueryTemplate(org.gcube.com.fasterxml.jackson.databind.JsonNode jsonQuery)	Creates a new JsonQueryQueryTemplate 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

JsonQueryQueryTemplate

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

Parameters:

jsonQuery - the JSON query node representing the query template

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