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| 1 | /* | ||
| 2 | * Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package javax.management; | ||
| 27 | |||
| 28 | |||
| 29 | import com.sun.jmx.mbeanserver.GetPropertyAction; | ||
| 30 | |||
| 31 | import java.io.IOException; | ||
| 32 | import java.io.ObjectInputStream; | ||
| 33 | import java.io.ObjectOutputStream; | ||
| 34 | import java.io.ObjectStreamField; | ||
| 35 | |||
| 36 | import java.security.AccessController; | ||
| 37 | |||
| 38 | /** | ||
| 39 | * This class represents numbers that are arguments to relational constraints. | ||
| 40 | * A NumericValueExp may be used anywhere a ValueExp is required. | ||
| 41 | * | ||
| 42 | * <p>The <b>serialVersionUID</b> of this class is <code>-4679739485102359104L</code>. | ||
| 43 | * | ||
| 44 | * @serial include | ||
| 45 | * | ||
| 46 | * @since 1.5 | ||
| 47 | */ | ||
| 48 | @SuppressWarnings("serial") // serialVersionUID not constant | ||
| 49 | class NumericValueExp extends QueryEval implements ValueExp { | ||
| 50 | |||
| 51 | // Serialization compatibility stuff: | ||
| 52 | // Two serial forms are supported in this class. The selected form depends | ||
| 53 | // on system property "jmx.serial.form": | ||
| 54 | // - "1.0" for JMX 1.0 | ||
| 55 | // - any other value for JMX 1.1 and higher | ||
| 56 | // | ||
| 57 | // Serial version for old serial form | ||
| 58 | private static final long oldSerialVersionUID = -6227876276058904000L; | ||
| 59 | // | ||
| 60 | // Serial version for new serial form | ||
| 61 | private static final long newSerialVersionUID = -4679739485102359104L; | ||
| 62 | // | ||
| 63 | // Serializable fields in old serial form | ||
| 64 | private static final ObjectStreamField[] oldSerialPersistentFields = | ||
| 65 | { | ||
| 66 | new ObjectStreamField("longVal", Long.TYPE), | ||
| 67 | new ObjectStreamField("doubleVal", Double.TYPE), | ||
| 68 | new ObjectStreamField("valIsLong", Boolean.TYPE) | ||
| 69 | }; | ||
| 70 | // | ||
| 71 | // Serializable fields in new serial form | ||
| 72 | private static final ObjectStreamField[] newSerialPersistentFields = | ||
| 73 | { | ||
| 74 | new ObjectStreamField("val", Number.class) | ||
| 75 | }; | ||
| 76 | // | ||
| 77 | // Actual serial version and serial form | ||
| 78 | private static final long serialVersionUID; | ||
| 79 | |||
| 80 | /** | ||
| 81 | * @serialField val Number The numeric value | ||
| 82 | * | ||
| 83 | * <p>The <b>serialVersionUID</b> of this class is <code>-4679739485102359104L</code>. | ||
| 84 | */ | ||
| 85 | private static final ObjectStreamField[] serialPersistentFields; | ||
| 86 | private Number val = 0.0; | ||
| 87 | |||
| 88 | private static boolean compat = false; | ||
| 89 | static { | ||
| 90 | try { | ||
| 91 | GetPropertyAction act = new GetPropertyAction("jmx.serial.form"); | ||
| 92 | String form = AccessController.doPrivileged(act); | ||
| 93 | compat = (form != null && form.equals("1.0")); | ||
| 94 | } catch (Exception e) { | ||
| 95 | // OK: exception means no compat with 1.0, too bad | ||
| 96 | } | ||
| 97 | if (compat) { | ||
| 98 | serialPersistentFields = oldSerialPersistentFields; | ||
| 99 | serialVersionUID = oldSerialVersionUID; | ||
| 100 | } else { | ||
| 101 | serialPersistentFields = newSerialPersistentFields; | ||
| 102 | serialVersionUID = newSerialVersionUID; | ||
| 103 | } | ||
| 104 | } | ||
| 105 | // | ||
| 106 | // END Serialization compatibility stuff | ||
| 107 | |||
| 108 | |||
| 109 | /** | ||
| 110 | * Basic constructor. | ||
| 111 | */ | ||
| 112 | public NumericValueExp() { | ||
| 113 | } | ||
| 114 | |||
| 115 | /** Creates a new NumericValue representing the numeric literal <val>.*/ | ||
| 116 | NumericValueExp(Number val) | ||
| 117 | { | ||
| 118 | this.val = val; | ||
| 119 | } | ||
| 120 | |||
| 121 | /** | ||
| 122 | * Returns a double numeric value | ||
| 123 | */ | ||
| 124 | public double doubleValue() { | ||
| 125 | if (val instanceof Long || val instanceof Integer) | ||
| 126 | { | ||
| 127 | return (double)(val.longValue()); | ||
| 128 | } | ||
| 129 | return val.doubleValue(); | ||
| 130 | } | ||
| 131 | |||
| 132 | /** | ||
| 133 | * Returns a long numeric value | ||
| 134 | */ | ||
| 135 | public long longValue() { | ||
| 136 | if (val instanceof Long || val instanceof Integer) | ||
| 137 | { | ||
| 138 | return val.longValue(); | ||
| 139 | } | ||
| 140 | return (long)(val.doubleValue()); | ||
| 141 | } | ||
| 142 | |||
| 143 | /** | ||
| 144 | * Returns true is if the numeric value is a long, false otherwise. | ||
| 145 | */ | ||
| 146 | public boolean isLong() { | ||
| 147 | return (val instanceof Long || val instanceof Integer); | ||
| 148 | } | ||
| 149 | |||
| 150 | /** | ||
| 151 | * Returns the string representing the object | ||
| 152 | */ | ||
| 153 | public String toString() { | ||
| 154 | if (val == null) | ||
| 155 | return "null"; | ||
| 156 | if (val instanceof Long || val instanceof Integer) | ||
| 157 | { | ||
| 158 | return Long.toString(val.longValue()); | ||
| 159 | } | ||
| 160 | double d = val.doubleValue(); | ||
| 161 | if (Double.isInfinite(d)) | ||
| 162 | return (d > 0) ? "(1.0 / 0.0)" : "(-1.0 / 0.0)"; | ||
| 163 | if (Double.isNaN(d)) | ||
| 164 | return "(0.0 / 0.0)"; | ||
| 165 | return Double.toString(d); | ||
| 166 | } | ||
| 167 | |||
| 168 | /** | ||
| 169 | * Applies the ValueExp on a MBean. | ||
| 170 | * | ||
| 171 | * @param name The name of the MBean on which the ValueExp will be applied. | ||
| 172 | * | ||
| 173 | * @return The <CODE>ValueExp</CODE>. | ||
| 174 | * | ||
| 175 | * @exception BadStringOperationException | ||
| 176 | * @exception BadBinaryOpValueExpException | ||
| 177 | * @exception BadAttributeValueExpException | ||
| 178 | * @exception InvalidApplicationException | ||
| 179 | */ | ||
| 180 | public ValueExp apply(ObjectName name) | ||
| 181 | throws BadStringOperationException, BadBinaryOpValueExpException, | ||
| 182 | BadAttributeValueExpException, InvalidApplicationException { | ||
| 183 | return this; | ||
| 184 | } | ||
| 185 | |||
| 186 | /** | ||
| 187 | * Deserializes a {@link NumericValueExp} from an {@link ObjectInputStream}. | ||
| 188 | */ | ||
| 189 | private void readObject(ObjectInputStream in) | ||
| 190 | throws IOException, ClassNotFoundException { | ||
| 191 | if (compat) | ||
| 192 | { | ||
| 193 | // Read an object serialized in the old serial form | ||
| 194 | // | ||
| 195 | double doubleVal; | ||
| 196 | long longVal; | ||
| 197 | boolean isLong; | ||
| 198 | ObjectInputStream.GetField fields = in.readFields(); | ||
| 199 | doubleVal = fields.get("doubleVal", (double)0); | ||
| 200 | if (fields.defaulted("doubleVal")) | ||
| 201 | { | ||
| 202 | throw new NullPointerException("doubleVal"); | ||
| 203 | } | ||
| 204 | longVal = fields.get("longVal", (long)0); | ||
| 205 | if (fields.defaulted("longVal")) | ||
| 206 | { | ||
| 207 | throw new NullPointerException("longVal"); | ||
| 208 | } | ||
| 209 | isLong = fields.get("valIsLong", false); | ||
| 210 | if (fields.defaulted("valIsLong")) | ||
| 211 | { | ||
| 212 | throw new NullPointerException("valIsLong"); | ||
| 213 | } | ||
| 214 | if (isLong) | ||
| 215 | { | ||
| 216 | this.val = longVal; | ||
| 217 | } | ||
| 218 | else | ||
| 219 | { | ||
| 220 | this.val = doubleVal; | ||
| 221 | } | ||
| 222 | } | ||
| 223 | else | ||
| 224 | { | ||
| 225 | // Read an object serialized in the new serial form | ||
| 226 | // | ||
| 227 | in.defaultReadObject(); | ||
| 228 | } | ||
| 229 | } | ||
| 230 | |||
| 231 | |||
| 232 | /** | ||
| 233 | * Serializes a {@link NumericValueExp} to an {@link ObjectOutputStream}. | ||
| 234 | */ | ||
| 235 | private void writeObject(ObjectOutputStream out) | ||
| 236 | throws IOException { | ||
| 237 | if (compat) | ||
| 238 | { | ||
| 239 | // Serializes this instance in the old serial form | ||
| 240 | // | ||
| 241 | ObjectOutputStream.PutField fields = out.putFields(); | ||
| 242 | fields.put("doubleVal", doubleValue()); | ||
| 243 | fields.put("longVal", longValue()); | ||
| 244 | fields.put("valIsLong", isLong()); | ||
| 245 | out.writeFields(); | ||
| 246 | } | ||
| 247 | else | ||
| 248 | { | ||
| 249 | // Serializes this instance in the new serial form | ||
| 250 | // | ||
| 251 | out.defaultWriteObject(); | ||
| 252 | } | ||
| 253 | } | ||
| 254 | |||
| 255 | @Deprecated | ||
| 256 | public void setMBeanServer(MBeanServer s) { | ||
| 257 | super.setMBeanServer(s); | ||
| 258 | } | ||
| 259 | |||
| 260 | } | ||