Example usage for javax.persistence.criteria CriteriaBuilder notEqual

Introduction

In this page you can find the example usage for javax.persistence.criteria CriteriaBuilder notEqual.

Prototype

Predicate notEqual(Expression<?> x, Object y);

Source Link

Document

Create a predicate for testing the arguments for inequality.

Usage

From source file:org.seedstack.i18n.rest.internal.TranslationJpaFinder.java

/**
 * Extracts predicates from criteria.//from  ww  w.  j  a  v a 2s.  c  o  m
 *
 * @param criteria criteria
 * @param cb       criteria builder
 * @param k        root key
 * @return list of predicate
 */
private Predicate[] getPredicates(Map<String, Object> criteria, CriteriaQuery q, CriteriaBuilder cb,
        Root<Key> k) {
    List<Predicate> predicates = new ArrayList<Predicate>();
    if (criteria != null) {
        // extract criteria from the map
        Boolean isApprox = (Boolean) criteria.get(IS_APPROX);
        Boolean isMissing = (Boolean) criteria.get(IS_MISSING);
        Boolean isOutdated = (Boolean) criteria.get(IS_OUTDATED);
        String searchName = (String) criteria.get(SEARCH_NAME);
        String locale = (String) criteria.get(LOCALE);

        // is the key LIKE searchName
        if (StringUtils.isNotBlank(searchName)) {
            predicates.add(cb.like(k.<String>get(ENTITY_ID), "%" + searchName + "%"));
        }

        // if a default translation is available
        if (isApprox != null || isOutdated != null) {
            // join translation table
            Join<Key, Translation> tln = k.join(TRANSLATIONS, JoinType.LEFT);
            // WHERE locale = default locale
            predicates.add(cb.equal(tln.get(ENTITY_ID).get(LOCALE), locale));

            // is the key outdated
            if (isOutdated != null) {
                predicates.add(cb.equal(tln.<Boolean>get(OUTDATED), isOutdated));
            }

            // is the translation approximate
            if (isApprox != null) {
                predicates.add(cb.equal(tln.<Boolean>get(APPROXIMATE), isApprox));
            }
        }
        // is the translation missing
        if (isMissing != null) {
            // SubQuery to find all the key which get a translation for the default locale
            //noinspection unchecked
            Subquery<String> subquery = q.subquery(String.class);
            Root<Key> fromKey = subquery.from(Key.class);
            subquery.select(fromKey.<String>get(ENTITY_ID));
            Join join = fromKey.join(TRANSLATIONS, JoinType.LEFT);
            subquery.where(cb.and(cb.equal(join.get(ENTITY_ID).get(LOCALE), locale),
                    cb.notEqual(join.get(VALUE), "")));
            // Find all keys not in the above subquery, ie. all the keys missing
            predicates.add(cb.not(cb.in(k.get(ENTITY_ID)).value(subquery)));
        }
    }
    return predicates.toArray(new Predicate[predicates.size()]);
}

From source file:org.xiaoqiaotq.util.persistence.DynamicSpecifications.java

public static <T> Specification<T> bySearchFilter(final Collection<SearchFilter> filters,
        final Class<T> entityClazz) {
    return new Specification<T>() {
        @Override//from  w ww. j av  a2s .  co m
        public Predicate toPredicate(Root<T> root, CriteriaQuery<?> query, CriteriaBuilder builder) {
            if ((filters != null) && !(filters.isEmpty())) {

                List<Predicate> predicates = Lists.newArrayList();
                for (SearchFilter filter : filters) {
                    // nested path translate, Task??"user.name"filedName, ?Task.user.name
                    String[] names = StringUtils.split(filter.fieldName, ".");
                    Path expression = root.get(names[0]);
                    for (int i = 1; i < names.length; i++) {
                        expression = expression.get(names[i]);
                    }
                    // logic operator
                    switch (filter.operator) {
                    case EQ:
                        predicates.add(builder.equal(expression, filter.value));
                        break;
                    case NEQ:
                        predicates.add(builder.notEqual(expression, filter.value));
                        break;
                    case LIKE:
                        predicates.add(builder.like(expression, "%" + filter.value + "%"));
                        break;
                    case GT:
                        predicates.add(builder.greaterThan(expression, (Comparable) filter.value));
                        break;
                    case LT:
                        predicates.add(builder.lessThan(expression, (Comparable) filter.value));
                        break;
                    case GTE:
                        predicates.add(builder.greaterThanOrEqualTo(expression, (Comparable) filter.value));
                        break;
                    case LTE:
                        predicates.add(builder.lessThanOrEqualTo(expression, (Comparable) filter.value));
                        break;
                    }
                }

                // ? and ???
                if (!predicates.isEmpty()) {
                    return builder.and(predicates.toArray(new Predicate[predicates.size()]));
                }
            }

            return builder.conjunction();
        }
    };
}