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1 /* |
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2 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package jdk.jfr.internal.cmd; |
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27 |
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28 import java.io.PrintWriter; |
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29 |
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30 abstract class StructuredWriter { |
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31 private final static String LINE_SEPARATOR = String.format("%n"); |
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32 |
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33 private final PrintWriter out; |
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34 private final StringBuilder builder = new StringBuilder(4000); |
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35 |
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36 private char[] indentionArray = new char[0]; |
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37 private int indent = 0; |
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38 private int column; |
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39 |
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40 StructuredWriter(PrintWriter p) { |
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41 out = p; |
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42 } |
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43 |
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44 final protected int getColumn() { |
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45 return column; |
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46 } |
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47 |
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48 // Flush to print writer |
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49 public final void flush() { |
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50 out.print(builder.toString()); |
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51 builder.setLength(0); |
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52 } |
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53 |
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54 final public void printIndent() { |
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55 builder.append(indentionArray, 0, indent); |
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56 column += indent; |
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57 } |
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58 |
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59 final public void println() { |
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60 builder.append(LINE_SEPARATOR); |
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61 column = 0; |
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62 } |
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63 |
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64 final public void print(String... texts) { |
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65 for (String text : texts) { |
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66 print(text); |
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67 } |
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68 } |
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69 |
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70 final public void printAsString(Object o) { |
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71 print(String.valueOf(o)); |
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72 } |
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73 |
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74 final public void print(String text) { |
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75 builder.append(text); |
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76 column += text.length(); |
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77 } |
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78 |
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79 final public void print(char c) { |
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80 builder.append(c); |
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81 column++; |
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82 } |
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83 |
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84 final public void print(int value) { |
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85 print(String.valueOf(value)); |
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86 } |
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87 |
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88 final public void indent() { |
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89 indent += 2; |
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90 updateIndent(); |
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91 } |
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92 |
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93 final public void retract() { |
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94 indent -= 2; |
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95 updateIndent(); |
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96 } |
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97 |
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98 final public void println(String text) { |
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99 print(text); |
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100 println(); |
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101 } |
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102 |
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103 private void updateIndent() { |
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104 if (indent > indentionArray.length) { |
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105 indentionArray = new char[indent]; |
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106 for (int i = 0; i < indentionArray.length; i++) { |
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107 indentionArray[i] = ' '; |
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108 } |
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109 } |
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110 } |
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111 } |