content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.apache.activemq.junit;
  
  import org.junit.runners.model.Statement;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public final class RepeatStatement extends Statement {
  
      private static final Logger LOG = LoggerFactory.getLogger(RepeatStatement.class);
  
      private final int repetitions;
      private final boolean untilFailure;
      private final Statement statement;
  
      public static Builder builder() {
          return new Builder();
      }
  
      public RepeatStatement(int times, boolean untilFailure, Statement statement) {
          this.repetitions = times;
          this.untilFailure = untilFailure;
          this.statement = statement;
      }
  
      protected RepeatStatement(Builder builder, Statement next) {
          this.repetitions = builder.getRepetitions();
          this.untilFailure = builder.isUntilFailure();
          this.statement = next;
      }
  
      @Override
      public void evaluate() throws Throwable {
          for (int i = 0; i < repetitions && !untilFailure; i++) {
              if (untilFailure) {
                  LOG.info("Running test iteration: {}.", i + 1);
              } else {
                  LOG.info("Running test iteration: {} of configured repetitions: {}", i + 1, repetitions);
              }
              statement.evaluate();
          }
      }
  
      /**
       * Builder for {@link Repeat}.
       */
      public static class Builder {
          private int repetitions = 1;
          private boolean untilFailure = false;
  
          protected Builder() {}
  
          /**
           * Specifies the number of times to run the test.
           *
           * @param repetitions
           *      The number of times to run the test.
           *
           * @return {@code this} for method chaining.
           */
          public Builder withRepetitions(int repetitions) {
              if (repetitions <= 0) {
                  throw new IllegalArgumentException("repetitions must be greater than zero");
              }
  
              this.repetitions = repetitions;
              return this;
          }
  
          /**
           * Specifies the number of times to run the test.
           *
           * @param untilFailure
           *      true if the test should run until a failure occurs.
           *
           * @return {@code this} for method chaining.
           */
          public Builder withRunUntilFailure(boolean untilFailure) {
              this.untilFailure = untilFailure;
              return this;
          }
  
          protected int getRepetitions() {
              return repetitions;
          }
  
          protected boolean isUntilFailure()  {
              return untilFailure;
          }
  
          /**
           * Builds a {@link RepeatStatement} instance using the values in this builder.
           *
           * @param next
           *      The statement instance to wrap with the newly create repeat statement.
           *
           * @return a new {@link RepeatStatement} that wraps the given {@link Statement}.
           */
          public RepeatStatement build(Statement next) {
              if (next == null) {
                  throw new NullPointerException("statement cannot be null");
              }
  
              return new RepeatStatement(this, next);
          }
  
          /**
           * Builds a {@link RepeatStatement} instance using the values in this builder.
           *
           * @param annotation
           *      The {@link Repeat} annotation that triggered this statement being created.
           * @param next
           *      The statement instance to wrap with the newly create repeat statement.
           *
           * @return a new {@link RepeatStatement} that wraps the given {@link Statement}.
           */
          public RepeatStatement build(Repeat annotation, Statement next) {
              if (next == null) {
                  throw new NullPointerException("statement cannot be null");
              }
  
              if (annotation == null) {
                  throw new NullPointerException("annotation cannot be null");
              }
  
              withRepetitions(annotation.repetitions());
              withRunUntilFailure(annotation.untilFailure());
  
              return new RepeatStatement(this, next);
          }
      }
  }