Showing the changes to java/pkg/sun/management/Flag.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 2003, 2010, 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 sun.management; | |
| 27 | + | |
| 28 | +import java.util.*; | |
| 29 | +import com.sun.management.VMOption; | |
| 30 | +import com.sun.management.VMOption.Origin; | |
| 31 | + | |
| 32 | +/** | |
| 33 | + * Flag class is a helper class for constructing a VMOption. | |
| 34 | + * It has the static methods for getting the Flag objects, each | |
| 35 | + * corresponds to one VMOption. | |
| 36 | + * | |
| 37 | + */ | |
| 38 | +class Flag { | |
| 39 | + private String name; | |
| 40 | + private Object value; | |
| 41 | + private Origin origin; | |
| 42 | + private boolean writeable; | |
| 43 | + private boolean external; | |
| 44 | + | |
| 45 | + Flag(String name, Object value, boolean writeable, | |
| 46 | + boolean external, Origin origin) { | |
| 47 | + this.name = name; | |
| 48 | + this.value = value == null ? "" : value ; | |
| 49 | + this.origin = origin; | |
| 50 | + this.writeable = writeable; | |
| 51 | + this.external = external; | |
| 52 | + } | |
| 53 | + | |
| 54 | + Object getValue() { | |
| 55 | + return value; | |
| 56 | + } | |
| 57 | + | |
| 58 | + boolean isWriteable() { | |
| 59 | + return writeable; | |
| 60 | + } | |
| 61 | + | |
| 62 | + boolean isExternal() { | |
| 63 | + return external; | |
| 64 | + } | |
| 65 | + | |
| 66 | + VMOption getVMOption() { | |
| 67 | + return new VMOption(name, value.toString(), writeable, origin); | |
| 68 | + } | |
| 69 | + | |
| 70 | + static Flag getFlag(String name) { | |
| 71 | + String[] names = new String[1]; | |
| 72 | + names[0] = name; | |
| 73 | + | |
| 74 | + List<Flag> flags = getFlags(names, 1); | |
| 75 | + if (flags.isEmpty()) { | |
| 76 | + return null; | |
| 77 | + } else { | |
| 78 | + // flags should have only one element | |
| 79 | + return flags.get(0); | |
| 80 | + } | |
| 81 | + } | |
| 82 | + | |
| 83 | + static List<Flag> getAllFlags() { | |
| 84 | + int numFlags = getInternalFlagCount(); | |
| 85 | + | |
| 86 | + // Get all internal flags with names = null | |
| 87 | + return getFlags(null, numFlags); | |
| 88 | + } | |
| 89 | + | |
| 90 | + private static List<Flag> getFlags(String[] names, int numFlags) { | |
| 91 | + Flag[] flags = new Flag[numFlags]; | |
| 92 | + int count = getFlags(names, flags, numFlags); | |
| 93 | + | |
| 94 | + List<Flag> result = new ArrayList<Flag>(); | |
| 95 | + for (Flag f : flags) { | |
| 96 | + if (f != null) { | |
| 97 | + result.add(f); | |
| 98 | + } | |
| 99 | + } | |
| 100 | + return result; | |
| 101 | + } | |
| 102 | + | |
| 103 | + private static native String[] getAllFlagNames(); | |
| 104 | + // getFlags sets each element in the given flags array | |
| 105 | + // with a Flag object only if the name is valid and the | |
| 106 | + // type is supported. The flags array may contain null elements. | |
| 107 | + private static native int getFlags(String[] names, Flag[] flags, int count); | |
| 108 | + private static native int getInternalFlagCount(); | |
| 109 | + | |
| 110 | + // These set* methods are synchronized on the class object | |
| 111 | + // to avoid multiple threads updating the same flag at the same time. | |
| 112 | + static synchronized native void setLongValue(String name, long value); | |
| 113 | + static synchronized native void setBooleanValue(String name, boolean value); | |
| 114 | + static synchronized native void setStringValue(String name, String value); | |
| 115 | + | |
| 116 | + static { | |
| 117 | + initialize(); | |
| 118 | + } | |
| 119 | + private static native void initialize(); | |
| 120 | +} | |