DatatableSpecification.java 文件源码

private Predicate getPredicateColonnes(final Root<T> root, final CriteriaQuery<?> query, final CriteriaBuilder cb,
    Predicate predicate) {
    // check for each searchable column whether a filter value exists
    for (final DatatableColumn column : input.getColumns()) {
        final boolean isColumnSearchable =
            column.getSearchable() && column.getSearch() != null
                && hasText(column.getSearch().getValue());
        if (!isColumnSearchable) {
            continue;
        }

        LOGGER.fine("colonne a filtrer: {"+ column+"}");

        // the filter contains only one value, add a 'WHERE .. LIKE'
        // clause
        if (isBoolean(column.getSearch().getValue())) {
            final Expression<Boolean> booleanExpression = DatatableHelper.getExpression(root, column.getData(), Boolean.class);
            predicate =
                cb.and(predicate, cb.equal(booleanExpression, Boolean.valueOf(column.getSearch().getValue())));
        } else {
            final Expression<String> stringExpression = DatatableHelper.getExpression(root, column.getData(), String.class);
            predicate = cb.and(predicate, cb.like(cb.lower(stringExpression),
                getLikeFilterValue(column.getSearch().getValue()), ESCAPE_CHAR));
        }

    }
    return predicate;
}