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.kafka.message;
  
  import java.io.IOException;
  import java.io.Writer;
  import java.util.ArrayList;
  
  public class CodeBuffer {
      private final ArrayList<String> lines;
      private int indent;
  
      public CodeBuffer() {
          this.lines = new ArrayList<>();
          this.indent = 0;
      }
  
      public void incrementIndent() {
          indent++;
      }
  
      public void decrementIndent() {
          indent--;
          if (indent < 0) {
              throw new RuntimeException("Indent < 0");
          }
      }
  
      public void printf(String format, Object... args) {
          lines.add(String.format(indentSpaces() + format, args));
      }
  
      public void write(Writer writer) throws IOException {
          for (String line : lines) {
              writer.write(line);
          }
      }
  
      public void write(CodeBuffer other) {
          for (String line : lines) {
              other.lines.add(other.indentSpaces() + line);
          }
      }
  
      private String indentSpaces() {
          return "    ".repeat(Math.max(0, indent));
      }
  
      @Override
      public boolean equals(Object other) {
          if (!(other instanceof CodeBuffer)) {
              return false;
          }
          CodeBuffer o = (CodeBuffer) other;
          return lines.equals(o.lines);
      }
  
      @Override
      public int hashCode() {
          return lines.hashCode();
      }
  }
  