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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 | + } | |