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MyBatis framework for generating dynamic SQL
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/*
* Copyright 2016-2024 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;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.function.Supplier;
public abstract class AbstractSingleValueCondition implements VisitableCondition {
protected final T value;
protected AbstractSingleValueCondition(T value) {
this.value = value;
}
public T value() {
return value;
}
@Override
public R accept(ConditionVisitor visitor) {
return visitor.visit(this);
}
protected > S filterSupport(Predicate predicate,
Supplier emptySupplier, S self) {
if (isEmpty()) {
return self;
} else {
return predicate.test(value) ? self : emptySupplier.get();
}
}
protected > S mapSupport(Function mapper,
Function constructor, Supplier emptySupplier) {
if (isEmpty()) {
return emptySupplier.get();
} else {
return constructor.apply(mapper.apply(value));
}
}
/**
* If renderable and the value matches the predicate, returns this condition. Else returns a condition
* that will not render.
*
* @param predicate predicate applied to the value, if renderable
* @return this condition if renderable and the value matches the predicate, otherwise a condition
* that will not render.
*/
public abstract AbstractSingleValueCondition filter(Predicate predicate);
public abstract String operator();
}