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.beam.sdk.util.construction;
  
  import java.util.function.Predicate;
  
  /** A utility class to interact with synthetic pipeline components. */
  public class SyntheticComponents {
    private SyntheticComponents() {}
  
    /**
     * Generate an ID which does not collide with any existing ID, as determined by the input
     * predicate.
     *
     * <p>The returned ID will be in the form "${baseName}:${number}".
     */
    public static String uniqueId(String baseName, Predicate<String> existingIds) {
      int i = 0;
      String name;
      do {
        name = String.format("%s:%s", baseName, i);
        i++;
      } while (existingIds.test(name));
      return name;
    }
  }
  