content: /*
   * Copyright (C) 2010 The Android Open Source Project
   *
   * 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 android.util;
  
  /**
   * PrefixPrinter is a Printer which prefixes all lines with a given
   * prefix.
   *
   * @hide
   */
  public class PrefixPrinter implements Printer {
      private final Printer mPrinter;
      private final String mPrefix;
  
      /**
       * Creates a new PrefixPrinter.
       *
       * <p>If prefix is null or empty, the provided printer is returned, rather
       * than making a prefixing printer.
       */
      public static Printer create(Printer printer, String prefix) {
          if (prefix == null || prefix.equals("")) {
              return printer;
          }
          return new PrefixPrinter(printer, prefix);
      }
  
      private PrefixPrinter(Printer printer, String prefix) {
          mPrinter = printer;
          mPrefix = prefix;
      }
  
      public void println(String str) {
          mPrinter.println(mPrefix + str);
      }
  }
  