1 package org.ibex.nestedvm.util;
7 import java.text.DateFormatSymbols;
10 GCCLASS_HINT: org.ibex.nestedvm.util.Platform.<clinit> org.ibex.nestedvm.util.Platform$Jdk11.<init>
11 GCCLASS_HINT: org.ibex.nestedvm.util.Platform.<clinit> org.ibex.nestedvm.util.Platform$Jdk12.<init>
12 GCCLASS_HINT: org.ibex.nestedvm.util.Platform.<clinit> org.ibex.nestedvm.util.Platform$Jdk13.<init>
13 GCCLASS_HINT: org.ibex.nestedvm.util.Platform.<clinit> org.ibex.nestedvm.util.Platform$Jdk14.<init>
16 public abstract class Platform {
18 private static final Platform p;
23 if(getProperty("java.vm.name").equals("SableVM"))
26 version = Float.valueOf(getProperty("java.specification.version")).floatValue();
27 } catch(Exception e) {
28 System.err.println("WARNING: " + e + " while trying to find jvm version - assuming 1.1");
32 if(version >= 1.4f) platformClass = "Jdk14";
33 else if(version >= 1.3f) platformClass = "Jdk13";
34 else if(version >= 1.2f) platformClass = "Jdk12";
35 else if(version >= 1.1f) platformClass = "Jdk11";
36 else throw new Error("JVM Specification version: " + version + " is too old. (see org.ibex.util.Platform to add support)");
39 p = (Platform) Class.forName(Platform.class.getName() + "$" + platformClass).newInstance();
40 } catch(Exception e) {
42 throw new Error("Error instansiating platform class");
46 public static String getProperty(String key) {
48 return System.getProperty(key);
49 } catch(SecurityException e) {
55 abstract boolean _atomicCreateFile(File f) throws IOException;
56 public static boolean atomicCreateFile(File f) throws IOException { return p._atomicCreateFile(f); }
58 abstract void _socketHalfClose(Socket s, boolean output) throws IOException;
59 public static void socketHalfClose(Socket s, boolean output) throws IOException { p._socketHalfClose(s,output); }
61 abstract void _socketSetKeepAlive(Socket s, boolean on) throws SocketException;
62 public static void socketSetKeepAlive(Socket s, boolean on) throws SocketException { p._socketSetKeepAlive(s,on); }
64 abstract InetAddress _inetAddressFromBytes(byte[] a) throws UnknownHostException;
65 public static InetAddress inetAddressFromBytes(byte[] a) throws UnknownHostException { return p._inetAddressFromBytes(a); }
67 abstract String _timeZoneGetDisplayName(TimeZone tz, boolean dst, boolean showlong, Locale l);
68 public static String timeZoneGetDisplayName(TimeZone tz, boolean dst, boolean showlong, Locale l) { return p._timeZoneGetDisplayName(tz,dst,showlong,l); }
69 public static String timeZoneGetDisplayName(TimeZone tz, boolean dst, boolean showlong) { return timeZoneGetDisplayName(tz,dst,showlong,Locale.getDefault()); }
71 abstract RandomAccessFile _truncatedRandomAccessFile(File f, String mode) throws IOException;
72 public static RandomAccessFile truncatedRandomAccessFile(File f, String mode) throws IOException { return p._truncatedRandomAccessFile(f,mode); }
74 static class Jdk11 extends Platform {
75 boolean _atomicCreateFile(File f) throws IOException {
76 // This is not atomic, but its the best we can do on jdk 1.1
77 if(f.exists()) return false;
78 new FileOutputStream(f).close();
81 void _socketHalfClose(Socket s, boolean output) throws IOException {
82 throw new IOException("half closing sockets not supported");
84 InetAddress _inetAddressFromBytes(byte[] a) throws UnknownHostException {
85 if(a.length != 4) throw new UnknownHostException("only ipv4 addrs supported");
86 return InetAddress.getByName(""+(a[0]&0xff)+"."+(a[1]&0xff)+"."+(a[2]&0xff)+"."+(a[3]&0xff));
88 void _socketSetKeepAlive(Socket s, boolean on) throws SocketException {
89 if(on) throw new SocketException("keepalive not supported");
91 String _timeZoneGetDisplayName(TimeZone tz, boolean dst, boolean showlong, Locale l) {
92 String[][] zs = new DateFormatSymbols(l).getZoneStrings();
93 String id = tz.getID();
94 for(int i=0;i<zs.length;i++)
95 if(zs[i][0].equals(id))
96 return zs[i][dst ? (showlong ? 3 : 4) : (showlong ? 1 : 2)];
97 StringBuffer sb = new StringBuffer("GMT");
98 int off = tz.getRawOffset() / 1000;
99 if(off < 0) { sb.append("-"); off = -off; }
101 sb.append(off/3600); off = off%3600;
102 if(off > 0) sb.append(":").append(off/60); off=off%60;
103 if(off > 0) sb.append(":").append(off);
104 return sb.toString();
107 RandomAccessFile _truncatedRandomAccessFile(File f, String mode) throws IOException {
108 new FileOutputStream(f).close();
109 return new RandomAccessFile(f,mode);
113 static class Jdk12 extends Jdk11 {
114 boolean _atomicCreateFile(File f) throws IOException {
115 return f.createNewFile();
118 String _timeZoneGetDisplayName(TimeZone tz, boolean dst, boolean showlong, Locale l) {
119 return tz.getDisplayName(dst,showlong ? TimeZone.LONG : TimeZone.SHORT, l);
122 RandomAccessFile _truncatedRandomAccessFile(File f, String mode) throws IOException {
123 RandomAccessFile raf = new RandomAccessFile(f,mode);
129 static class Jdk13 extends Jdk12 {
130 void _socketHalfClose(Socket s, boolean output) throws IOException {
131 if(output) s.shutdownOutput();
132 else s.shutdownInput();
135 void _socketSetKeepAlive(Socket s, boolean on) throws SocketException {
140 static class Jdk14 extends Jdk13 {
141 InetAddress _inetAddressFromBytes(byte[] a) throws UnknownHostException { return InetAddress.getByAddress(a); }