/
IterableMatcher.java
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/
IterableMatcher.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.IterableOperators;
import java.util.function.UnaryOperator;
/**
* Matcher on {@link Iterable} types. Has methods like {@code isEmpty()} / {@code notEmpty()}
* and others.
*/
public interface IterableMatcher<R, S, V> extends Matcher {
default R contains(V value) {
return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(IterableOperators.CONTAINS, e, Expressions.constant(value)));
}
/**
* Match iterable attribute to be empty (equivalent to {@code iterable.size() == 0})
*/
default R isEmpty() {
return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(IterableOperators.IS_EMPTY, e));
}
/**
* Match iterable attribute to be NOT empty (equivalent to {@code iterable.size() > 0})
*/
default R notEmpty() {
return Matchers.extract(this).applyAndCreateRoot(e -> Expressions.call(IterableOperators.NOT_EMPTY, e));
}
default R hasSize(int size) {
UnaryOperator<Expression> expr = e -> Expressions.call(IterableOperators.HAS_SIZE, e, Expressions.constant(size));
return Matchers.extract(this).applyAndCreateRoot(expr);
}
interface Self<R, V, P> extends Template<Self<R, V, P>, Self<R, V, P>, V, P>, Disjunction<Self<R, V, P>> {}
interface Template<R, S, V, P> extends IterableMatcher<R, S, V>, Projection<P>, NotMatcher<R, Self<R, V, P>> {}
@SuppressWarnings("unchecked")
static <R> CriteriaCreator<R> creator() {
class Local extends AbstractContextHolder implements Self {
private Local(CriteriaContext context) {
super(context);
}
}
return ctx -> (R) new Local(ctx);
}
}