/*
 * Copyright 2015-2020 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
 *
 *      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.springframework.data.querydsl.binding;

import java.util.Optional;

import com.querydsl.core.types.Path;
import com.querydsl.core.types.Predicate;

OptionalValueBinding creates a Predicate out of given Path and value. Used for specific parameter treatment in QuerydslBindings. 
Author:
Christoph Strobl, Oliver Gierke
Since:
1.11/**
 * {@link OptionalValueBinding} creates a {@link Predicate} out of given {@link Path} and value. Used for specific
 * parameter treatment in {@link QuerydslBindings}.
 *
 * @author Christoph Strobl
 * @author Oliver Gierke
 * @since 1.11
 */
@FunctionalInterface
public interface OptionalValueBinding<T extends Path<? extends S>, S> {

	
Returns the predicate to be applied to the given Path for the given value. The given value will be the first the first one provided for the given path and converted into the expected type. 
Params:
path – Path to the property. Will not be null.
value – the value that should be bound. Will not be null.
Returns:
can be null, in which case the binding will not be incorporated in the overall Predicate ./**
	 * Returns the predicate to be applied to the given {@link Path} for the given value. The given value will be the
	 * first the first one provided for the given path and converted into the expected type.
	 *
	 * @param path {@link Path} to the property. Will not be {@literal null}.
	 * @param value the value that should be bound. Will not be {@literal null}.
	 * @return can be {@literal null}, in which case the binding will not be incorporated in the overall {@link Predicate}
	 *         .
	 */
	Optional<Predicate> bind(T path, Optional<? extends S> value);
}