1 /* |
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2 * Copyright (c) 2005, 2008, 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 sun.management; |
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27 |
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28 import com.sun.management.VMOption; |
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29 import com.sun.management.VMOption.Origin; |
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30 import javax.management.openmbean.CompositeType; |
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31 import javax.management.openmbean.CompositeData; |
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32 import javax.management.openmbean.CompositeDataSupport; |
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33 import javax.management.openmbean.OpenDataException; |
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34 |
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35 /** |
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36 * A CompositeData for VMOption for the local management support. |
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37 * This class avoids the performance penalty paid to the |
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38 * construction of a CompositeData use in the local case. |
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39 */ |
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40 public class VMOptionCompositeData extends LazyCompositeData { |
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41 private final VMOption option; |
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42 |
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43 private VMOptionCompositeData(VMOption option) { |
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44 this.option = option; |
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45 } |
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46 |
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47 public VMOption getVMOption() { |
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48 return option; |
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49 } |
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50 |
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51 public static CompositeData toCompositeData(VMOption option) { |
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52 VMOptionCompositeData vcd = new VMOptionCompositeData(option); |
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53 return vcd.getCompositeData(); |
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54 } |
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55 |
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56 protected CompositeData getCompositeData() { |
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57 // CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH |
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58 // vmOptionItemNames! |
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59 final Object[] vmOptionItemValues = { |
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60 option.getName(), |
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61 option.getValue(), |
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62 option.isWriteable(), |
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63 option.getOrigin().toString(), |
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64 }; |
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65 |
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66 try { |
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67 return new CompositeDataSupport(vmOptionCompositeType, |
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68 vmOptionItemNames, |
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69 vmOptionItemValues); |
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70 } catch (OpenDataException e) { |
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71 // Should never reach here |
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72 throw new AssertionError(e); |
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73 } |
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74 } |
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75 |
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76 private static final CompositeType vmOptionCompositeType; |
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77 static { |
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78 try { |
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79 vmOptionCompositeType = (CompositeType) |
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80 MappedMXBeanType.toOpenType(VMOption.class); |
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81 } catch (OpenDataException e) { |
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82 // Should never reach here |
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83 throw new AssertionError(e); |
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84 } |
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85 } |
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86 |
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87 static CompositeType getVMOptionCompositeType() { |
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88 return vmOptionCompositeType; |
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89 } |
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90 |
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91 private static final String NAME = "name"; |
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92 private static final String VALUE = "value"; |
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93 private static final String WRITEABLE = "writeable"; |
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94 private static final String ORIGIN = "origin"; |
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95 |
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96 private static final String[] vmOptionItemNames = { |
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97 NAME, |
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98 VALUE, |
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99 WRITEABLE, |
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100 ORIGIN, |
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101 }; |
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102 |
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103 public static String getName(CompositeData cd) { |
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104 return getString(cd, NAME); |
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105 } |
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106 public static String getValue(CompositeData cd) { |
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107 return getString(cd, VALUE); |
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108 } |
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109 public static Origin getOrigin(CompositeData cd) { |
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110 String o = getString(cd, ORIGIN); |
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111 return Enum.valueOf(Origin.class, o); |
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112 } |
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113 public static boolean isWriteable(CompositeData cd) { |
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114 return getBoolean(cd, WRITEABLE); |
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115 } |
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116 |
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117 /** Validate if the input CompositeData has the expected |
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118 * CompositeType (i.e. contain all attributes with expected |
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119 * names and types). |
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120 */ |
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121 public static void validateCompositeData(CompositeData cd) { |
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122 if (cd == null) { |
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123 throw new NullPointerException("Null CompositeData"); |
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124 } |
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125 |
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126 if (!isTypeMatched(vmOptionCompositeType, cd.getCompositeType())) { |
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127 throw new IllegalArgumentException( |
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128 "Unexpected composite type for VMOption"); |
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129 } |
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130 } |
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131 |
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132 private static final long serialVersionUID = -2395573975093578470L; |
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133 } |
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