package net.ftb.util.winreg;
/**
* Java Finder by petrucio@stackoverflow(828681) is licensed under a Creative Commons Attribution 3.0 Unported License.
* Needs WinRegistry.java. Get it at: http://stackoverflow.com/questions/62289/read-write-to-windows-registry-using-java
*
* JavaFinder - Windows-specific classes to search for all installed versions of java on this system
* Author: petrucio@stackoverflow (828681)
*****************************************************************************/
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import com.google.common.collect.Lists;
import net.ftb.log.Logger;
import net.ftb.util.OSUtils;
import net.ftb.util.OSUtils.OS;
/**
* Windows-specific java versions finder
*****************************************************************************/
public class JavaFinder {
public static boolean java8Found = false;
/**
* @return: A list of javaExec paths found under this registry key (rooted at HKEY_LOCAL_MACHINE)
* @param wow64 0 for standard registry access (32-bits for 32-bit app, 64-bits for 64-bits app)
* or WinRegistry.KEY_WOW64_32KEY to force access to 32-bit registry view,
* or WinRegistry.KEY_WOW64_64KEY to force access to 64-bit registry view
* @param previous: Insert all entries from this list at the beggining of the results
*************************************************************************/
private static List<String> searchRegistry (String key, int wow64, final List<String> previous) {
List<String> result = previous;
try {
List<String> entries = WinRegistry.readStringSubKeys(WinRegistry.HKEY_LOCAL_MACHINE, key, wow64);
for (int i = 0; entries != null && i < entries.size(); i++) {
String val = WinRegistry.readString(WinRegistry.HKEY_LOCAL_MACHINE, key + "\\" + entries.get(i), "JavaHome", wow64);
if (!result.contains(val + "\\bin\\java.exe")) {
result.add(val + "\\bin\\java.exe");
}
}
} catch (Throwable t) {
Logger.logError("Error Searching windows registry for java versions", t);
}
return result;
}
/**
* @return: A list of JavaInfo with informations about all javas installed on this machine
* Searches and returns results in this order:
* HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment (32-bits view)
* HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment (64-bits view)
* HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Development Kit (32-bits view)
* HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Development Kit (64-bits view)
* WINDIR\system32
* WINDIR\SysWOW64
****************************************************************************/
public static List<JavaInfo> findJavas () {
if (OSUtils.getCurrentOS() == OS.MACOSX) {
return findMacJavas();
}
if (OSUtils.getCurrentOS() == OS.WINDOWS) {
return findWinJavas();
}
return Lists.newArrayList();
}
protected static List<JavaInfo> findWinJavas () {
List<String> javaExecs = Lists.newArrayList();
javaExecs = JavaFinder.searchRegistry("SOFTWARE\\JavaSoft\\Java Runtime Environment", WinRegistry.KEY_WOW64_32KEY, javaExecs);
javaExecs = JavaFinder.searchRegistry("SOFTWARE\\JavaSoft\\Java Runtime Environment", WinRegistry.KEY_WOW64_64KEY, javaExecs);
javaExecs = JavaFinder.searchRegistry("SOFTWARE\\JavaSoft\\Java Development Kit", WinRegistry.KEY_WOW64_32KEY, javaExecs);
javaExecs = JavaFinder.searchRegistry("SOFTWARE\\JavaSoft\\Java Development Kit", WinRegistry.KEY_WOW64_64KEY, javaExecs);
javaExecs.add(System.getenv("WINDIR") + "\\system32\\java.exe");
javaExecs.add(System.getenv("WINDIR") + "\\SysWOW64\\java.exe");
javaExecs.add(System.getProperty("java.home") + "\\bin\\java.exe");
List<JavaInfo> result = Lists.newArrayList();
for (String javaPath : javaExecs) {
if (!(new File(javaPath).exists())) {
continue;
}
try {
result.add(new JavaInfo(javaPath));
} catch (Exception e) {
Logger.logDebug("Error while creating JavaInfo");
}
}
return result;
}
protected static String getMacJavaPath (String javaVersion) {
String versionInfo;
versionInfo = RuntimeStreamer.execute(new String[] { "/usr/libexec/java_home", "-v " + javaVersion });
// Unable to find any JVMs matching version "1.7"
if (versionInfo.contains("version \"" + javaVersion + "\"")) {
return null;
}
return versionInfo.trim();
}
protected static List<JavaInfo> findMacJavas () {
List<String> javaExecs = Lists.newArrayList();
String javaVersion;
javaVersion = getMacJavaPath("1.6");
if (javaVersion != null) {
javaExecs.add(javaVersion + "/bin/java");
}
javaVersion = getMacJavaPath("1.7");
if (javaVersion != null) {
javaExecs.add(javaVersion + "/bin/java");
}
javaVersion = getMacJavaPath("1.8");
if (javaVersion != null) {
javaExecs.add(javaVersion + "/bin/java");
}
javaExecs.add("/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java");
javaExecs.add(System.getProperty("java.home") + "/bin/java");
List<JavaInfo> result = Lists.newArrayList();
for (String javaPath : javaExecs) {
File javaFile = new File(javaPath);
if (!javaFile.exists() || !javaFile.canExecute()) {
continue;
}
try {
result.add(new JavaInfo(javaPath));
} catch (Exception e) {
Logger.logDebug("Error while creating JavaInfo", e);
}
}
return result;
}
/**
* @return: The path to a java.exe that has the same bitness as the OS
* (or null if no matching java is found)
****************************************************************************/
public static String getOSBitnessJava () {
boolean isOS64 = OSUtils.is64BitWindows();
List<JavaInfo> javas = JavaFinder.findJavas();
for (JavaInfo java : javas) {
if (java.is64bits == isOS64) {
return java.path;
}
}
return null;
}
private static JavaInfo preferred;
/**
* Standalone testing - lists all Javas in the system
****************************************************************************/
public static JavaInfo parseJavaVersion () {
if (preferred == null) {
List<JavaInfo> javas = JavaFinder.findJavas();
List<JavaInfo> java32 = Lists.newArrayList();
List<JavaInfo> java64 = Lists.newArrayList();
Logger.logInfo("The FTB Launcher has found the following Java versions installed:");
for (JavaInfo java : javas) {
Logger.logInfo(java.toString());
if (java.isJava8()) {
java8Found = true;
}
if (java.supportedVersion) {
if (preferred == null && java != null) {
preferred = java;
}
if (java.is64bits) {
java64.add(java);
} else {
java32.add(java);
}
}
}
if (java64.size() > 0) {
for (JavaInfo aJava64 : java64) {
if (!preferred.is64bits || aJava64.compareTo(preferred) == 1) {
preferred = aJava64;
}
}
}
if (java32.size() > 0) {
for (JavaInfo aJava32 : java32) {
if (!preferred.is64bits && aJava32.compareTo(preferred) == 1) {
preferred = aJava32;
}
}
}
Logger.logInfo("Preferred: " + String.valueOf(preferred));
}
if (preferred != null) {
return preferred;
} else {
Logger.logError("No Java versions found!");
return null;
}
}
}