flink-spector-master/flinkspector-core/src/main/java/io/flinkspector/core/trigger/FinishAtMatch.java
/*
 * Copyright 2015 Otto (GmbH & Co KG)
 *
 * 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 io.flinkspector.core.trigger;

import org.hamcrest.Matcher;

/**
 * This trigger uses a {@link Matcher} to determine whether to finish a validation,
 * on receiving a record.
 * <p>
 * If the provided {@link Matcher} returns true the test will be finished early.
 *
 * @param <OUT>
 */
public class FinishAtMatch<OUT> implements VerifyFinishedTrigger<OUT> {

    /**
     * {@link Matcher} used internally.
     */
    private final Matcher<OUT> matcher;

    /**
     * Default constructor
     *
     * @param matcher used for triggering.
     */
    public FinishAtMatch(Matcher<OUT> matcher) {
        this.matcher = matcher;
    }

    public static <T> FinishAtMatch<T> of(Matcher<T> matcher) {
        return new FinishAtMatch<T>(matcher);
    }

    @Override
    public boolean onRecord(OUT record) {
        return matcher.matches(record);
    }

    @Override
    public boolean onRecordCount(long count) {
        return false;
    }
}
