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An alternative API for filtering data with Spring MVC and Spring Data JPA. This library provides a custom HandlerMethodArgumentResolver that transforms HTTP parameters into a Specification object ready to use with Spring Data repositories.

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/**
 * Copyright 2014-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.kaczmarzyk.spring.data.jpa.domain;

import net.kaczmarzyk.spring.data.jpa.utils.Converter;
import net.kaczmarzyk.spring.data.jpa.utils.QueryContext;

import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;

/**
 * Filters with not equal where-clause (e.g. {@code where firstName <> "Homer"}).
 *
 * Supports multiple field types: strings, numbers, booleans, enums, dates.
 *
 * If the field type is string, the where-clause is case insensitive
 *
 * @author Mateusz Fedkowicz
 **/
public class NotEqualIgnoreCase extends NotEqual {

	private static final long serialVersionUID = 1L;

	public NotEqualIgnoreCase(QueryContext queryContext, String path, String[] httpParamValues, Converter converter) {
		super(queryContext, path, httpParamValues, converter);
	}

	@Override
	public Predicate toPredicate(Root root, CriteriaQuery query, CriteriaBuilder cb) {
		return path(root).getJavaType().equals(String.class)
				? cb.notEqual(cb.upper(this.path(root)), expectedValue.toUpperCase())
				: super.toPredicate(root, query, cb);
	}

}