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Sparql.java
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Sparql.java
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/**
* Copyright (C) 2022 Czech Technical University in Prague
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details. You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.jopa.model.annotations;
import java.lang.annotation.*;
/**
* This annotation can be used for creating SPARQL queries directly on repository fields.
* <p>
* The field and query parameters cannot be of a primitive type.
* <p>
* Example:
* <pre>
* <code>
* @Sparql("PREFIX jopa:<http://krizik.felk.cvut.cz/ontologies/jopa/>\n" +
* "SELECT ?stringAttribute WHERE {" +
* "?this jopa:attributes#B-stringAttribute ?stringAttribute}")
* private String stringQueryAttribute;
* </code>
* </pre>
*/
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.FIELD)
public @interface Sparql {
/**
* A native SPARQL query including any prefixes and parameters.
*/
String query();
/**
* Whether to allow referencing other entity attributes in the query.
* <p>
* If enabled, the provider will attempt to replace variables with names matching entity attributes with the
* attribute values.
* <p>
* Note that lazily loaded attribute values may not be used.
*
* @return {@code true} if variables referencing other entity attributes should be replaced in the query with the
* attribute values, {@code false} otherwise
*/
boolean enableReferencingAttributes() default true;
/**
* If {@code FetchType.LAZY} is specified the attribute will not be initialized during entity construction but
* rather only when it is required by a getter method.
*/
FetchType fetchType() default FetchType.EAGER;
}