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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 "JavaUtils.h"
#include "pathutils.h"
#include <QStringList>
#include <QString>
#include <QDir>
#include <logger/QsLog.h>
JavaUtils::JavaUtils()
{
}
std::vector<java_install> JavaUtils::GetDefaultJava()
{
std::vector<java_install> javas;
javas.push_back(std::make_tuple("java", "unknown", "java", false));
return javas;
}
#if WINDOWS
std::vector<java_install> JavaUtils::FindJavaFromRegistryKey(DWORD keyType, QString keyName)
{
std::vector<java_install> 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);
javas.push_back(std::make_tuple(subKeyName, archType, QDir(PathCombine(value, "bin")).absoluteFilePath("java.exe"), (recommended == subKeyName)));
}
RegCloseKey(newKey);
}
}
}
}
RegCloseKey(jreKey);
}
return javas;
}
std::vector<java_install> JavaUtils::FindJavaPaths()
{
std::vector<java_install> JRE64s = this->FindJavaFromRegistryKey(KEY_WOW64_64KEY, "SOFTWARE\\JavaSoft\\Java Runtime Environment");
std::vector<java_install> JDK64s = this->FindJavaFromRegistryKey(KEY_WOW64_64KEY, "SOFTWARE\\JavaSoft\\Java Development Kit");
std::vector<java_install> JRE32s = this->FindJavaFromRegistryKey(KEY_WOW64_32KEY, "SOFTWARE\\JavaSoft\\Java Runtime Environment");
std::vector<java_install> JDK32s = this->FindJavaFromRegistryKey(KEY_WOW64_32KEY, "SOFTWARE\\JavaSoft\\Java Development Kit");
std::vector<java_install> javas;
javas.insert(javas.end(), JRE64s.begin(), JRE64s.end());
javas.insert(javas.end(), JDK64s.begin(), JDK64s.end());
javas.insert(javas.end(), JRE32s.begin(), JRE32s.end());
javas.insert(javas.end(), JDK32s.begin(), JDK32s.end());
if(javas.size() <= 0)
{
QLOG_WARN() << "Failed to find Java in the Windows registry - defaulting to \"java\"";
return this->GetDefaultJava();
}
QLOG_INFO() << "Found the following Java installations (64 -> 32, JRE -> JDK): ";
for(auto &java : javas)
{
QString sRec;
if(std::get<JI_REC>(java)) sRec = "(Recommended)";
QLOG_INFO() << std::get<JI_ID>(java) << std::get<JI_ARCH>(java) << " at " << std::get<JI_PATH>(java) << sRec;
}
return javas;
}
#elif OSX
std::vector<java_install> JavaUtils::FindJavaPath()
{
QLOG_INFO() << "OS X Java detection incomplete - defaulting to \"java\"";
return this->GetDefaultPath();
}
#elif LINUX
std::vector<java_install> JavaUtils::FindJavaPath()
{
QLOG_INFO() << "Linux Java detection incomplete - defaulting to \"java\"";
return this->GetDefaultPath();
}
#else
std::vector<java_install> JavaUtils::FindJavaPath()
{
QLOG_INFO() << "Unknown operating system build - defaulting to \"java\"";
return this->GetDefaultPath();
}
#endif
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