Examples with CompoundSelection io.micronaut.data.model.jpa.criteria.impl.selection.CompoundSelection used on opensource projects

Example 1 with CompoundSelection

use of io.micronaut.data.model.jpa.criteria.impl.selection.CompoundSelection in project micronaut-data by micronaut-projects.

the class SourcePersistentEntityCriteriaQueryImpl method getQueryResultTypeName.

@Override
public String getQueryResultTypeName() {
    if (selection instanceof ISelection) {
        String[] result = new String[1];
        ((SelectionVisitable) selection).accept(new SelectionVisitor() {

            @Override
            public void visit(Predicate predicate) {
            }

            @Override
            public void visit(PersistentPropertyPath<?> persistentPropertyPath) {
                result[0] = ((SourcePersistentPropertyPath) persistentPropertyPath).getProperty().getType().getName();
            }

            @Override
            public void visit(AliasedSelection<?> aliasedSelection) {
                ((SelectionVisitable) aliasedSelection.getSelection()).accept(this);
            }

            @Override
            public void visit(PersistentEntityRoot<?> entityRoot) {
                result[0] = ((SourcePersistentEntity) entityRoot.getPersistentEntity()).getType().getName();
            }

            @Override
            public void visit(AggregateExpression<?, ?> aggregateExpression) {
                switch(aggregateExpression.getType()) {
                    case COUNT:
                    case COUNT_DISTINCT:
                        result[0] = Long.class.getName();
                        break;
                    case MAX:
                    case MIN:
                        result[0] = requireProperty(aggregateExpression.getExpression()).getProperty().getTypeName();
                        break;
                    case SUM:
                    case AVG:
                        ClassElement type = ((SourcePersistentProperty) requireProperty(aggregateExpression.getExpression()).getProperty()).getType();
                        if (aggregateExpression.getExpressionType() != null) {
                            result[0] = aggregateExpression.getExpressionType().getName();
                        }
                        if (TypeUtils.isNumber(type)) {
                            result[0] = Number.class.getName();
                        } else {
                            result[0] = type.getName();
                        }
                        break;
                    default:
                        return;
                }
            }

            @Override
            public void visit(CompoundSelection<?> compoundSelection) {
                if (compoundSelection.getCompoundSelectionItems().size() == 1) {
                    // Multiple selection shouldn't result in one type
                    compoundSelection.getCompoundSelectionItems().forEach(s -> ((SelectionVisitable) s).accept(this));
                }
            }

            @Override
            public void visit(LiteralExpression<?> literalExpression) {
                result[0] = literalExpression.getValue().getClass().getName();
            }

            @Override
            public void visit(IdExpression<?, ?> idExpression) {
                SourcePersistentEntity persistentEntity = (SourcePersistentEntity) idExpression.getRoot().getPersistentEntity();
                if (persistentEntity.hasCompositeIdentity()) {
                    throw new IllegalStateException("IdClass is unknown!");
                }
                result[0] = persistentEntity.getIdentity().getType().getName();
            }
        });
        return result[0];
    }
    return null;
}