1 /* 2 * Copyright (C) 2010 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 android.util; 18 19 /** 20 * PrefixPrinter is a Printer which prefixes all lines with a given 21 * prefix. 22 * 23 * @hide 24 */ 25 public class PrefixPrinter implements Printer { 26 private final Printer mPrinter; 27 private final String mPrefix; 28 29 /** 30 * Creates a new PrefixPrinter. 31 * 32 * <p>If prefix is null or empty, the provided printer is returned, rather 33 * than making a prefixing printer. 34 */ 35 public static Printer create(Printer printer, String prefix) { 36 if (prefix == null || prefix.equals("")) { 37 return printer; 38 } 39 return new PrefixPrinter(printer, prefix); 40 } 41 42 private PrefixPrinter(Printer printer, String prefix) { 43 mPrinter = printer; 44 mPrefix = prefix; 45 } 46 47 public void println(String str) { 48 mPrinter.println(mPrefix + str); 49 } 50 } 51
