jdk/src/share/classes/sun/misc/Version-template.java
changeset 2 90ce3da70b43
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/misc/Version-template.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,327 @@
+/*
+ * Copyright 1999-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.misc;
+import java.io.PrintStream;
+
+public class Version {
+
+
+    private static final String launcher_name =
+        "@@launcher_name@@";
+
+    private static final String java_version =
+        "@@java_version@@";
+
+    private static final String java_runtime_name =
+        "@@java_runtime_name@@";
+
+    private static final String java_runtime_version =
+        "@@java_runtime_version@@";
+
+    static {
+        init();
+    }
+
+    public static void init() {
+        System.setProperty("java.version", java_version);
+        System.setProperty("java.runtime.version", java_runtime_version);
+        System.setProperty("java.runtime.name", java_runtime_name);
+    }
+
+    private static boolean versionsInitialized = false;
+    private static int jvm_major_version = 0;
+    private static int jvm_minor_version = 0;
+    private static int jvm_micro_version = 0;
+    private static int jvm_update_version = 0;
+    private static int jvm_build_number = 0;
+    private static String jvm_special_version = null;
+    private static int jdk_major_version = 0;
+    private static int jdk_minor_version = 0;
+    private static int jdk_micro_version = 0;
+    private static int jdk_update_version = 0;
+    private static int jdk_build_number = 0;
+    private static String jdk_special_version = null;
+
+    /**
+     * In case you were wondering this method is called by java -version.
+     * Sad that it prints to stderr; would be nicer if default printed on
+     * stdout.
+     */
+    public static void print() {
+        print(System.err);
+    }
+
+    /**
+     * This is the same as print except that it adds an extra line-feed
+     * at the end, typically used by the -showversion in the launcher
+     */
+    public static void println() {
+        print(System.err);
+        System.err.println();
+    }
+
+    /**
+     * Give a stream, it will print version info on it.
+     */
+    public static void print(PrintStream ps) {
+        /* First line: platform version. */
+        ps.println(launcher_name + " version \"" + java_version + "\"");
+
+        /* Second line: runtime version (ie, libraries). */
+        ps.println(java_runtime_name + " (build " +
+                           java_runtime_version + ")");
+
+        /* Third line: JVM information. */
+        String java_vm_name    = System.getProperty("java.vm.name");
+        String java_vm_version = System.getProperty("java.vm.version");
+        String java_vm_info    = System.getProperty("java.vm.info");
+        ps.println(java_vm_name + " (build " + java_vm_version + ", " +
+                   java_vm_info + ")");
+    }
+
+
+    /**
+     * Returns the major version of the running JVM if it's 1.6 or newer
+     * or any RE VM build. It will return 0 if it's an internal 1.5 or
+     * 1.4.x build.
+     *
+     * @since 1.6
+     */
+    public static synchronized int jvmMajorVersion() {
+        if (!versionsInitialized) {
+            initVersions();
+        }
+        return jvm_major_version;
+    }
+
+    /**
+     * Returns the minor version of the running JVM if it's 1.6 or newer
+     * or any RE VM build. It will return 0 if it's an internal 1.5 or
+     * 1.4.x build.
+     * @since 1.6
+     */
+    public static synchronized int jvmMinorVersion() {
+        if (!versionsInitialized) {
+            initVersions();
+        }
+        return jvm_minor_version;
+    }
+
+
+    /**
+     * Returns the micro version of the running JVM if it's 1.6 or newer
+     * or any RE VM build. It will return 0 if it's an internal 1.5 or
+     * 1.4.x build.
+     * @since 1.6
+     */
+    public static synchronized int jvmMicroVersion() {
+        if (!versionsInitialized) {
+            initVersions();
+        }
+        return jvm_micro_version;
+    }
+
+    /**
+     * Returns the update release version of the running JVM if it's
+     * a RE build. It will return 0 if it's an internal build.
+     * @since 1.6
+     */
+    public static synchronized int jvmUpdateVersion() {
+        if (!versionsInitialized) {
+            initVersions();
+        }
+        return jvm_update_version;
+    }
+
+    public static synchronized String jvmSpecialVersion() {
+        if (!versionsInitialized) {
+            initVersions();
+        }
+        if (jvm_special_version == null) {
+            jvm_special_version = getJvmSpecialVersion();
+        }
+        return jvm_special_version;
+    }
+    public static native String getJvmSpecialVersion();
+
+    /**
+     * Returns the build number of the running JVM if it's a RE build
+     * It will return 0 if it's an internal build.
+     * @since 1.6
+     */
+    public static synchronized int jvmBuildNumber() {
+        if (!versionsInitialized) {
+            initVersions();
+        }
+        return jvm_build_number;
+    }
+
+    /**
+     * Returns the major version of the running JDK.
+     *
+     * @since 1.6
+     */
+    public static synchronized int jdkMajorVersion() {
+        if (!versionsInitialized) {
+            initVersions();
+        }
+        return jdk_major_version;
+    }
+
+    /**
+     * Returns the minor version of the running JDK.
+     * @since 1.6
+     */
+    public static synchronized int jdkMinorVersion() {
+        if (!versionsInitialized) {
+            initVersions();
+        }
+        return jdk_minor_version;
+    }
+
+    /**
+     * Returns the micro version of the running JDK.
+     * @since 1.6
+     */
+    public static synchronized int jdkMicroVersion() {
+        if (!versionsInitialized) {
+            initVersions();
+        }
+        return jdk_micro_version;
+    }
+
+    /**
+     * Returns the update release version of the running JDK if it's
+     * a RE build. It will return 0 if it's an internal build.
+     * @since 1.6
+     */
+    public static synchronized int jdkUpdateVersion() {
+        if (!versionsInitialized) {
+            initVersions();
+        }
+        return jdk_update_version;
+    }
+
+    public static synchronized String jdkSpecialVersion() {
+        if (!versionsInitialized) {
+            initVersions();
+        }
+        if (jdk_special_version == null) {
+            jdk_special_version = getJdkSpecialVersion();
+        }
+        return jdk_special_version;
+    }
+    public static native String getJdkSpecialVersion();
+
+    /**
+     * Returns the build number of the running JDK if it's a RE build
+     * It will return 0 if it's an internal build.
+     * @since 1.6
+     */
+    public static synchronized int jdkBuildNumber() {
+        if (!versionsInitialized) {
+            initVersions();
+        }
+        return jdk_build_number;
+    }
+
+    // true if JVM exports the version info including the capabilities
+    private static boolean jvmVersionInfoAvailable;
+    private static synchronized void initVersions() {
+        if (versionsInitialized) {
+            return;
+        }
+        jvmVersionInfoAvailable = getJvmVersionInfo();
+        if (!jvmVersionInfoAvailable) {
+            // parse java.vm.version for older JVM before the
+            // new JVM_GetVersionInfo is added.
+            // valid format of the version string is:
+            // n.n.n[_uu[c]][-<identifer>]-bxx
+            CharSequence cs = System.getProperty("java.vm.version");
+            if (cs.length() >= 5 &&
+                Character.isDigit(cs.charAt(0)) && cs.charAt(1) == '.' &&
+                Character.isDigit(cs.charAt(2)) && cs.charAt(3) == '.' &&
+                Character.isDigit(cs.charAt(4))) {
+                jvm_major_version = Character.digit(cs.charAt(0), 10);
+                jvm_minor_version = Character.digit(cs.charAt(2), 10);
+                jvm_micro_version = Character.digit(cs.charAt(4), 10);
+                cs = cs.subSequence(5, cs.length());
+                if (cs.charAt(0) == '_' && cs.length() >= 3 &&
+                    Character.isDigit(cs.charAt(1)) &&
+                    Character.isDigit(cs.charAt(2))) {
+                    int nextChar = 3;
+                    try {
+                        String uu = cs.subSequence(1, 3).toString();
+                        jvm_update_version = Integer.valueOf(uu).intValue();
+                        if (cs.length() >= 4) {
+                            char c = cs.charAt(3);
+                            if (c >= 'a' && c <= 'z') {
+                                jvm_special_version = Character.toString(c);
+                                nextChar++;
+                            }
+                        }
+                    } catch (NumberFormatException e) {
+                        // not conforming to the naming convention
+                        return;
+                    }
+                    cs = cs.subSequence(nextChar, cs.length());
+                }
+                if (cs.charAt(0) == '-') {
+                    // skip the first character
+                    // valid format: <identifier>-bxx or bxx
+                    // non-product VM will have -debug|-release appended
+                    cs = cs.subSequence(1, cs.length());
+                    String[] res = cs.toString().split("-");
+                    for (String s : res) {
+                        if (s.charAt(0) == 'b' && s.length() == 3 &&
+                            Character.isDigit(s.charAt(1)) &&
+                            Character.isDigit(s.charAt(2))) {
+                            jvm_build_number =
+                                Integer.valueOf(s.substring(1, 3)).intValue();
+                            break;
+                        }
+                    }
+                }
+            }
+        }
+        getJdkVersionInfo();
+        versionsInitialized = true;
+    }
+
+    // Gets the JVM version info if available and sets the jvm_*_version fields
+    // and its capabilities.
+    //
+    // Return false if not available which implies an old VM (Tiger or before).
+    private static native boolean getJvmVersionInfo();
+    private static native void getJdkVersionInfo();
+
+}
+
+// Help Emacs a little because this file doesn't end in .java.
+//
+// Local Variables: ***
+// mode: java ***
+// End: ***