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// File : Main.java
// Project : Scala
// Author(s) : Stephane Micheloud (mics)
// Environment: JNI Registry 3.1.3, Sun JDK 1.4.2_09
// Version : 01
// Created : 25.09.2005/mics
// Modified : -
import com.ice.jni.registry.NoSuchKeyException;
import com.ice.jni.registry.NoSuchValueException;
import com.ice.jni.registry.Registry;
import com.ice.jni.registry.RegistryException;
import com.ice.jni.registry.RegistryKey;
import com.ice.jni.registry.RegistryValue;
import com.ice.jni.registry.RegMultiStringValue;
import com.ice.jni.registry.RegStringValue;
public class Main {
private static final String PATH = "PATH";
private static final String SCALA_HOME = "SCALA_HOME";
private static final String SCALA_BIN = "%" + SCALA_HOME + "%\\bin";
private static void updateRegistry(String homePath, String fullName) throws RegistryException {
// HKEY_CURRENT_USER\Environment
RegistryKey envKey = Registry.openSubkey(
Registry.HKEY_CURRENT_USER,
"Environment",
RegistryKey.ACCESS_ALL);
if (homePath != null) {
// set home directory
RegStringValue data = new RegStringValue(envKey, SCALA_HOME, homePath);
envKey.setValue(data);
// update user path
String path = envKey.getStringValue(PATH);
if (path.indexOf(SCALA_BIN) < 0) {
int inx = path.lastIndexOf(";");
StringBuffer buf = new StringBuffer(path);
if (0 < inx && inx < path.length()-1)
buf.append(";");
buf.append(SCALA_BIN);
data = new RegStringValue(envKey, PATH, buf.toString());
envKey.setValue(data);
}
}
else { // uninstall
// remove home directory
try {
envKey.deleteValue(SCALA_HOME);
}
catch (NoSuchValueException e) {
// do nothing
}
String path = envKey.getStringValue(PATH);
int inx1 = path.indexOf(SCALA_BIN);
if (inx1 >= 0) {
int inx2 = path.indexOf(";", inx1);
StringBuffer buf = new StringBuffer(path.substring(0, inx1));
if (inx2 >= 0)
buf.append(path.substring(inx2));
RegStringValue data = new RegStringValue(envKey, PATH, buf.toString());
envKey.setValue(data);
}
}
// HKEY_CURRENT_USER\Software
RegistryKey softwareKey = Registry.openSubkey(
Registry.HKEY_CURRENT_USER,
"Software",
RegistryKey.ACCESS_WRITE);
if (homePath != null) {
RegistryKey productKey = softwareKey.createSubKey(
fullName,
"java.lang.String",
RegistryKey.ACCESS_WRITE);
RegStringValue data = new RegStringValue(productKey, "Location", homePath);
productKey.setValue(data);
}
else { // uninstall
try {
softwareKey.deleteSubKey(fullName);
String name = fullName;
int inx = name.lastIndexOf("\\");
while (inx != -1) {
String parentName = name.substring(0, inx);
RegistryKey key = softwareKey.openSubKey(parentName, RegistryKey.ACCESS_READ);
int n = key.getNumberSubkeys();
if (n == 0) softwareKey.deleteSubKey(parentName);
name = parentName;
inx = name.lastIndexOf("\\");
}
}
catch (NoSuchKeyException e) {
// do nothing
}
}
}
public static void main(String[] args) {
int argc = args.length;
if (argc != 1 && argc != 2) {
System.out.println("Usage: java Main <version> [ <installpath> ]\n");
System.out.println("\tversion number (e.g. 1.4.0.1)");
System.out.println("\tinstall path (e.g. c:\\\\Program Files\\\\Scala)");
System.out.println();
System.exit((argc > 0) ? 1 : 0);
}
String homePath = (argc == 2) ? args[1] : null; // e.g. "C:\\Program Files\\Scala"
String fullName = "EPFL\\Scala\\" + args[0]; // e.g. "EPFL\\Scala\\1.4.0.1"
try {
updateRegistry(homePath, fullName);
}
catch (RegistryException e) {
System.out.println(e.getMessage());
System.exit(1);
}
}
}
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