1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.dexgen.util; 18 19 import java.io.PrintWriter; 20 import java.io.Writer; 21 22 /** 23 * Utilities for dealing with {@code Writer}s. 24 */ 25 public final class Writers { 26 /** 27 * This class is uninstantiable. 28 */ Writers()29 private Writers() { 30 // This space intentionally left blank. 31 } 32 33 /** 34 * Makes a {@code PrintWriter} for the given {@code Writer}, 35 * returning the given writer if it already happens to be the right 36 * class. 37 * 38 * @param writer {@code non-null;} writer to (possibly) wrap 39 * @return {@code non-null;} an appropriate instance 40 */ printWriterFor(Writer writer)41 public static PrintWriter printWriterFor(Writer writer) { 42 if (writer instanceof PrintWriter) { 43 return (PrintWriter) writer; 44 } 45 46 return new PrintWriter(writer); 47 } 48 } 49