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PresentAbsentMatcher.java
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PresentAbsentMatcher.java
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/*
* Copyright 2019 Immutables Authors and Contributors
*
* 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 org.immutables.criteria.matcher;
import org.immutables.criteria.expression.Expression;
import org.immutables.criteria.expression.Expressions;
import org.immutables.criteria.expression.OptionalOperators;
import java.util.function.UnaryOperator;
/**
* Base interface for optional and optional-derived matchers having just two methods:
* {@code isPresent()} and {@code isAbsent()}
*/
public interface PresentAbsentMatcher<R> extends Matcher {
default R isPresent() {
final UnaryOperator<Expression> expr = e -> Expressions.unaryCall(OptionalOperators.IS_PRESENT, e);
return Matchers.extract(this).applyAndCreateRoot(expr);
}
default R isAbsent() {
final UnaryOperator<Expression> expr = e -> Expressions.unaryCall(OptionalOperators.IS_ABSENT, e);
return Matchers.extract(this).applyAndCreateRoot(expr);
}
}