org.immutables.criteria.matcher.OrMatcher Maven / Gradle / Ivy

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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.Criterion;
import org.immutables.criteria.expression.Expression;
import org.immutables.criteria.expression.Expressions;

import java.util.function.UnaryOperator;

/**
 * Combines matchers using logical {@code OR}
 * @param  root criteria type
 */
public interface OrMatcher> extends Matcher {

  /**
   * Combine {@code this} and {@code other} expression (criteria / matcher) using logical {@code OR}
   * operator. Equivalent to {@code this OR other}.
   *
   * @param other other matcher
   * @return new root criteria with updated expression
   */
  default R or(R other) {
    final UnaryOperator expr = e -> Expressions.or(Matchers.concat(e, other));
    return Matchers.extract(this).apply(expr).or().root().create();
  }

}