Method: PathImpl(Metamodel, AbstractPathExpression, FieldSpecification, CriteriaBuilder)

1: /*
2: * JOPA
3: * Copyright (C) 2024 Czech Technical University in Prague
4: *
5: * This library is free software; you can redistribute it and/or
6: * modify it under the terms of the GNU Lesser General Public
7: * License as published by the Free Software Foundation; either
8: * version 3.0 of the License, or (at your option) any later version.
9: *
10: * This library is distributed in the hope that it will be useful,
11: * but WITHOUT ANY WARRANTY; without even the implied warranty of
12: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13: * Lesser General Public License for more details.
14: *
15: * You should have received a copy of the GNU Lesser General Public
16: * License along with this library.
17: */
18: package cz.cvut.kbss.jopa.query.criteria;
19:
20: import cz.cvut.kbss.jopa.model.metamodel.Bindable;
21: import cz.cvut.kbss.jopa.model.metamodel.FieldSpecification;
22: import cz.cvut.kbss.jopa.model.metamodel.Metamodel;
23: import cz.cvut.kbss.jopa.model.metamodel.TypesSpecification;
24: import cz.cvut.kbss.jopa.model.query.criteria.Path;
25: import cz.cvut.kbss.jopa.query.criteria.expressions.AbstractPathExpression;
26: import cz.cvut.kbss.jopa.model.query.criteria.CriteriaBuilder;
27:
28: public class PathImpl<X> extends AbstractPathExpression<X> implements Path<X> {
29:
30: protected String attributeName;
31: protected FieldSpecification<?, ?> attribute;
32:
33: public PathImpl(Metamodel metamodel, AbstractPathExpression pathSource, FieldSpecification<?, ?> attribute,
34: CriteriaBuilder cb) {
35: super(resolveBindableJavaType(attribute), pathSource, metamodel, cb);
36: this.attribute = attribute;
37: this.attributeName = attribute.getName();
38: }
39:
40: private static <E> Class<E> resolveBindableJavaType(FieldSpecification<?, ?> attribute) {
41: if (attribute instanceof TypesSpecification) {
42: return ((TypesSpecification) attribute).getElementType();
43: }
44: assert attribute instanceof Bindable;
45: return ((Bindable<E>) attribute).getBindableJavaType();
46: }
47:
48: @Override
49: public void setExpressionToQuery(StringBuilder query, CriteriaParameterFiller parameterFiller) {
50: if (this.pathSource != null) {
51: this.pathSource.setExpressionToQuery(query, parameterFiller);
52: query.append('.').append(attributeName);
53: } else {
54: query.append(attributeName);
55: }
56: }
57:
58: }