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/* Copyright 2013 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <QStringList>
#include <QString>
#include <QDir>
#include <QMessageBox>
#include <setting.h>
#include <pathutils.h>
#include "MultiMC.h"
#include "JavaUtils.h"
#include "logger/QsLog.h"
#include "gui/dialogs/VersionSelectDialog.h"
JavaUtils::JavaUtils()
{
}
JavaVersionPtr JavaUtils::GetDefaultJava()
{
JavaVersionPtr javaVersion(new JavaVersion());
javaVersion->id = "java";
javaVersion->arch = "unknown";
javaVersion->path = "java";
javaVersion->recommended = false;
return javaVersion;
}
#if WINDOWS
QList<JavaVersionPtr> JavaUtils::FindJavaFromRegistryKey(DWORD keyType, QString keyName)
{
QList<JavaVersionPtr> javas;
QString archType = "unknown";
if (keyType == KEY_WOW64_64KEY)
archType = "64";
else if (keyType == KEY_WOW64_32KEY)
archType = "32";
HKEY jreKey;
if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, keyName.toStdString().c_str(), 0,
KEY_READ | keyType | KEY_ENUMERATE_SUB_KEYS, &jreKey) == ERROR_SUCCESS)
{
// Read the current type version from the registry.
// This will be used to find any key that contains the JavaHome value.
char *value = new char[0];
DWORD valueSz = 0;
if (RegQueryValueExA(jreKey, "CurrentVersion", NULL, NULL, (BYTE *)value, &valueSz) ==
ERROR_MORE_DATA)
{
value = new char[valueSz];
RegQueryValueExA(jreKey, "CurrentVersion", NULL, NULL, (BYTE *)value, &valueSz);
}
QString recommended = value;
TCHAR subKeyName[255];
DWORD subKeyNameSize, numSubKeys, retCode;
// Get the number of subkeys
RegQueryInfoKey(jreKey, NULL, NULL, NULL, &numSubKeys, NULL, NULL, NULL, NULL, NULL,
NULL, NULL);
// Iterate until RegEnumKeyEx fails
if (numSubKeys > 0)
{
for (int i = 0; i < numSubKeys; i++)
{
subKeyNameSize = 255;
retCode = RegEnumKeyEx(jreKey, i, subKeyName, &subKeyNameSize, NULL, NULL, NULL,
NULL);
if (retCode == ERROR_SUCCESS)
{
// Now open the registry key for the version that we just got.
QString newKeyName = keyName + "\\" + subKeyName;
HKEY newKey;
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, newKeyName.toStdString().c_str(), 0,
KEY_READ | KEY_WOW64_64KEY, &newKey) == ERROR_SUCCESS)
{
// Read the JavaHome value to find where Java is installed.
value = new char[0];
valueSz = 0;
if (RegQueryValueEx(newKey, "JavaHome", NULL, NULL, (BYTE *)value,
&valueSz) == ERROR_MORE_DATA)
{
value = new char[valueSz];
RegQueryValueEx(newKey, "JavaHome", NULL, NULL, (BYTE *)value,
&valueSz);
// Now, we construct the version object and add it to the list.
JavaVersionPtr javaVersion(new JavaVersion());
javaVersion->id = subKeyName;
javaVersion->arch = archType;
javaVersion->path =
QDir(PathCombine(value, "bin")).absoluteFilePath("java.exe");
javaVersion->recommended = (recommended == subKeyName);
javas.append(javaVersion);
}
RegCloseKey(newKey);
}
}
}
}
RegCloseKey(jreKey);
}
return javas;
}
QList<JavaVersionPtr> JavaUtils::FindJavaPaths()
{
QList<JavaVersionPtr> javas;
QList<JavaVersionPtr> JRE64s = this->FindJavaFromRegistryKey(
KEY_WOW64_64KEY, "SOFTWARE\\JavaSoft\\Java Runtime Environment");
QList<JavaVersionPtr> JDK64s = this->FindJavaFromRegistryKey(
KEY_WOW64_64KEY, "SOFTWARE\\JavaSoft\\Java Development Kit");
QList<JavaVersionPtr> JRE32s = this->FindJavaFromRegistryKey(
KEY_WOW64_32KEY, "SOFTWARE\\JavaSoft\\Java Runtime Environment");
QList<JavaVersionPtr> JDK32s = this->FindJavaFromRegistryKey(
KEY_WOW64_32KEY, "SOFTWARE\\JavaSoft\\Java Development Kit");
javas.append(JRE64s);
javas.append(JDK64s);
javas.append(JRE32s);
javas.append(JDK32s);
if (javas.size() <= 0)
{
QLOG_WARN() << "Failed to find Java in the Windows registry - defaulting to \"java\"";
javas.append(this->GetDefaultJava());
return javas;
}
QLOG_INFO() << "Found the following Java installations (64 -> 32, JRE -> JDK): ";
for (auto &java : javas)
{
QString sRec;
if (java->recommended)
sRec = "(Recommended)";
QLOG_INFO() << java->id << java->arch << " at " << java->path << sRec;
}
return javas;
}
#elif OSX
QList<JavaVersionPtr> JavaUtils::FindJavaPaths()
{
QLOG_INFO() << "OS X Java detection incomplete - defaulting to \"java\"";
QList<JavaVersionPtr> javas;
javas.append(this->GetDefaultJava());
return javas;
}
#elif LINUX
QList<JavaVersionPtr> JavaUtils::FindJavaPaths()
{
QLOG_INFO() << "Linux Java detection incomplete - defaulting to \"java\"";
QList<JavaVersionPtr> javas;
javas.append(this->GetDefaultJava());
return javas;
}
#else
QList<JavaVersionPtr> JavaUtils::FindJavaPaths()
{
QLOG_INFO() << "Unknown operating system build - defaulting to \"java\"";
QList<JavaVersionPtr> javas;
javas.append(this->GetDefaultJava());
return javas;
}
#endif
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