content: /*
   * Copyright (C) 2007 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 com.taobao.android.dx.util;
  
  import java.io.PrintWriter;
  import java.io.Writer;
  
  /**
   * Utilities for dealing with {@code Writer}s.
   */
  public final class Writers {
      /**
       * This class is uninstantiable.
       */
      private Writers() {
          // This space intentionally left blank.
      }
  
      /**
       * Makes a {@code PrintWriter} for the given {@code Writer},
       * returning the given writer if it already happens to be the right
       * class.
       *
       * @param writer {@code non-null;} writer to (possibly) wrap
       * @return {@code non-null;} an appropriate instance
       */
      public static PrintWriter printWriterFor(Writer writer) {
          if (writer instanceof PrintWriter) {
              return (PrintWriter) writer;
          }
  
          return new PrintWriter(writer);
      }
  }
  