IsLikeCaseInsensitiveWhenPresent.java

/*
 *    Copyright 2016-2026 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
 *
 *       https://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 org.mybatis.dynamic.sql.where.condition;

import java.util.NoSuchElementException;
import java.util.function.Function;
import java.util.function.Predicate;

import org.jspecify.annotations.Nullable;
import org.mybatis.dynamic.sql.AbstractSingleValueCondition;
import org.mybatis.dynamic.sql.util.StringUtilities;

public class IsLikeCaseInsensitiveWhenPresent<T> extends AbstractSingleValueCondition<T>
        implements CaseInsensitiveRenderableCondition<T>, AbstractSingleValueCondition.Filterable<T>,
        AbstractSingleValueCondition.Mappable<T> {
    private static final IsLikeCaseInsensitiveWhenPresent<?> EMPTY =
            new IsLikeCaseInsensitiveWhenPresent<>("") { //$NON-NLS-1$
                @Override
                public String value() {
                    throw new NoSuchElementException("No value present"); //$NON-NLS-1$
                }

                @Override
                public boolean isEmpty() {
                    return true;
                }
            };

    public static <T> IsLikeCaseInsensitiveWhenPresent<T> empty() {
        @SuppressWarnings("unchecked")
        IsLikeCaseInsensitiveWhenPresent<T> t = (IsLikeCaseInsensitiveWhenPresent<T>) EMPTY;
        return t;
    }

    protected IsLikeCaseInsensitiveWhenPresent(T value) {
        super(StringUtilities.upperCaseIfPossible(value));
    }

    @Override
    public String operator() {
        return "like"; //$NON-NLS-1$
    }

    @Override
    public IsLikeCaseInsensitiveWhenPresent<T> filter(Predicate<? super T> predicate) {
        return filterSupport(predicate, IsLikeCaseInsensitiveWhenPresent::empty, this);
    }

    @Override
    public <R> IsLikeCaseInsensitiveWhenPresent<R> map(Function<? super T, ? extends @Nullable R> mapper) {
        return mapSupport(mapper, IsLikeCaseInsensitiveWhenPresent::of, IsLikeCaseInsensitiveWhenPresent::empty);
    }

    public static <T> IsLikeCaseInsensitiveWhenPresent<T> of(@Nullable T value) {
        if (value == null) {
            return empty();
        } else {
            return new IsLikeCaseInsensitiveWhenPresent<>(value);
        }
    }
}