First draft of multiple Java installation detection on Windows
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@ -185,9 +185,9 @@ void SettingsDialog::loadSettings(SettingsObject *s)
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void SettingsDialog::on_pushButton_clicked()
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{
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JavaUtils jut;
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QStringList paths = jut.FindJavaPath();
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auto javas = jut.FindJavaPaths();
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ui->javaPathTextBox->setText(paths.at(0));
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ui->javaPathTextBox->setText(std::get<JI_PATH>(javas.at(0)));
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}
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void SettingsDialog::on_btnBrowse_clicked()
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@ -374,6 +374,12 @@
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<layout class="QGridLayout" name="gridLayout_3">
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<item row="0" column="0">
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<widget class="QLabel" name="labelJavaPath">
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<property name="sizePolicy">
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<sizepolicy hsizetype="Fixed" vsizetype="Preferred">
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<horstretch>0</horstretch>
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<verstretch>0</verstretch>
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</sizepolicy>
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</property>
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<property name="text">
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<string>Java path:</string>
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</property>
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@ -381,6 +387,12 @@
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</item>
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<item row="2" column="0">
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<widget class="QLabel" name="labelJVMArgs">
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<property name="sizePolicy">
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<sizepolicy hsizetype="Fixed" vsizetype="Preferred">
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<horstretch>0</horstretch>
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<verstretch>0</verstretch>
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</sizepolicy>
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</property>
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<property name="text">
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<string>JVM arguments:</string>
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</property>
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@ -402,9 +414,6 @@
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<item row="0" column="1" colspan="3">
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<widget class="QLineEdit" name="javaPathTextBox"/>
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</item>
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<item row="2" column="1" colspan="3">
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<widget class="QLineEdit" name="jvmArgsTextBox"/>
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</item>
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<item row="1" column="2">
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<widget class="QPushButton" name="pushButton">
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<property name="sizePolicy">
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@ -418,6 +427,9 @@
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</property>
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</widget>
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</item>
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<item row="2" column="1" colspan="3">
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<widget class="QLineEdit" name="jvmArgsTextBox"/>
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</item>
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</layout>
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</widget>
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</item>
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@ -14,7 +14,6 @@
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*/
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#include "JavaUtils.h"
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#include "osutils.h"
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#include "pathutils.h"
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#include <QStringList>
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@ -22,27 +21,33 @@
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#include <QDir>
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#include <logger/QsLog.h>
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#if WINDOWS
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#include <windows.h>
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#endif
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JavaUtils::JavaUtils()
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{
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}
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#if WINDOWS
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QStringList JavaUtils::FindJavaPath()
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std::vector<java_install> JavaUtils::GetDefaultJava()
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{
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QStringList paths;
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std::vector<java_install> javas;
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javas.push_back(std::make_tuple("java", "unknown", "java", false));
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return javas;
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}
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#if WINDOWS
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std::vector<java_install> JavaUtils::FindJavaFromRegistryKey(DWORD keyType, QString keyName)
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{
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std::vector<java_install> javas;
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QString archType = "unknown";
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if(keyType == KEY_WOW64_64KEY) archType = "64";
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else if(keyType == KEY_WOW64_32KEY) archType = "32";
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HKEY jreKey;
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QString jreKeyName = "SOFTWARE\\JavaSoft\\Java Runtime Environment";
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if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, jreKeyName.toStdString().c_str(), 0, KEY_READ | KEY_WOW64_64KEY, &jreKey) == ERROR_SUCCESS)
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if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, keyName.toStdString().c_str(), 0, KEY_READ | keyType | KEY_ENUMERATE_SUB_KEYS, &jreKey) == ERROR_SUCCESS)
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{
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// Read the current JRE version from the registry.
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// This will be used to find the key that contains the JavaHome value.
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// Read the current type version from the registry.
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// This will be used to find any key that contains the JavaHome value.
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char *value = new char[0];
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DWORD valueSz = 0;
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if (RegQueryValueExA(jreKey, "CurrentVersion", NULL, NULL, (BYTE*)value, &valueSz) == ERROR_MORE_DATA)
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@ -51,64 +56,102 @@ QStringList JavaUtils::FindJavaPath()
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RegQueryValueExA(jreKey, "CurrentVersion", NULL, NULL, (BYTE*)value, &valueSz);
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}
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RegCloseKey(jreKey);
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QString recommended = value;
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// Now open the registry key for the JRE version that we just got.
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jreKeyName.append("\\").append(value);
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if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, jreKeyName.toStdString().c_str(), 0, KEY_READ | KEY_WOW64_64KEY, &jreKey) == ERROR_SUCCESS)
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TCHAR subKeyName[255];
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DWORD subKeyNameSize, numSubKeys, retCode;
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// Get the number of subkeys
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RegQueryInfoKey(jreKey, NULL, NULL, NULL, &numSubKeys, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
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// Iterate until RegEnumKeyEx fails
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if(numSubKeys > 0)
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{
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// Read the JavaHome value to find where Java is installed.
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value = new char[0];
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valueSz = 0;
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if (RegQueryValueExA(jreKey, "JavaHome", NULL, NULL, (BYTE*)value, &valueSz) == ERROR_MORE_DATA)
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for(int i = 0; i < numSubKeys; i++)
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{
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value = new char[valueSz];
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RegQueryValueExA(jreKey, "JavaHome", NULL, NULL, (BYTE*)value, &valueSz);
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subKeyNameSize = 255;
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retCode = RegEnumKeyEx(jreKey, i, subKeyName, &subKeyNameSize, NULL, NULL, NULL, NULL);
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if(retCode == ERROR_SUCCESS)
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{
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// Now open the registry key for the version that we just got.
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QString newKeyName = keyName + "\\" + subKeyName;
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paths << QDir(PathCombine(value, "bin")).absoluteFilePath("java.exe");
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HKEY newKey;
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if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, newKeyName.toStdString().c_str(), 0, KEY_READ | KEY_WOW64_64KEY, &newKey) == ERROR_SUCCESS)
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{
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// Read the JavaHome value to find where Java is installed.
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value = new char[0];
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valueSz = 0;
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if (RegQueryValueEx(newKey, "JavaHome", NULL, NULL, (BYTE*)value, &valueSz) == ERROR_MORE_DATA)
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{
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value = new char[valueSz];
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RegQueryValueEx(newKey, "JavaHome", NULL, NULL, (BYTE*)value, &valueSz);
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javas.push_back(std::make_tuple(subKeyName, archType, QDir(PathCombine(value, "bin")).absoluteFilePath("java.exe"), (recommended == subKeyName)));
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}
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RegCloseKey(newKey);
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}
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}
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}
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RegCloseKey(jreKey);
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}
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RegCloseKey(jreKey);
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}
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if(paths.length() <= 0)
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return javas;
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}
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std::vector<java_install> JavaUtils::FindJavaPaths()
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{
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std::vector<java_install> JRE64s = this->FindJavaFromRegistryKey(KEY_WOW64_64KEY, "SOFTWARE\\JavaSoft\\Java Runtime Environment");
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std::vector<java_install> JDK64s = this->FindJavaFromRegistryKey(KEY_WOW64_64KEY, "SOFTWARE\\JavaSoft\\Java Development Kit");
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std::vector<java_install> JRE32s = this->FindJavaFromRegistryKey(KEY_WOW64_32KEY, "SOFTWARE\\JavaSoft\\Java Runtime Environment");
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std::vector<java_install> JDK32s = this->FindJavaFromRegistryKey(KEY_WOW64_32KEY, "SOFTWARE\\JavaSoft\\Java Development Kit");
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std::vector<java_install> javas;
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javas.insert(javas.end(), JRE64s.begin(), JRE64s.end());
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javas.insert(javas.end(), JDK64s.begin(), JDK64s.end());
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javas.insert(javas.end(), JRE32s.begin(), JRE32s.end());
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javas.insert(javas.end(), JDK32s.begin(), JDK32s.end());
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if(javas.size() <= 0)
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{
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QLOG_WARN() << "Failed to find Java in the Windows registry - defaulting to \"java\"";
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paths << "java";
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return this->GetDefaultJava();
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}
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return paths;
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QLOG_INFO() << "Found the following Java installations (64 -> 32, JRE -> JDK): ";
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for(auto &java : javas)
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{
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QString sRec;
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if(std::get<JI_REC>(java)) sRec = "(Recommended)";
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QLOG_INFO() << std::get<JI_ID>(java) << std::get<JI_ARCH>(java) << " at " << std::get<JI_PATH>(java) << sRec;
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}
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return javas;
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}
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#elif OSX
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QStringList JavaUtils::FindJavaPath()
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std::vector<java_install> JavaUtils::FindJavaPath()
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{
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QLOG_INFO() << "OS X Java detection incomplete - defaulting to \"java\"";
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QStringList paths;
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paths << "java";
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return paths;
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return this->GetDefaultPath();
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}
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#elif LINUX
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QStringList JavaUtils::FindJavaPath()
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std::vector<java_install> JavaUtils::FindJavaPath()
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{
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QLOG_INFO() << "Linux Java detection incomplete - defaulting to \"java\"";
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QStringList paths;
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paths << "java";
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return paths;
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return this->GetDefaultPath();
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}
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#else
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QStringList JavaUtils::FindJavaPath()
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std::vector<java_install> JavaUtils::FindJavaPath()
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{
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QLOG_INFO() << "Unknown operating system build - defaulting to \"java\"";
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QStringList paths;
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paths << "java";
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return paths;
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return this->GetDefaultPath();
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}
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#endif
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@ -17,10 +17,28 @@
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#include <QStringList>
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#include "osutils.h"
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#if WINDOWS
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#include <windows.h>
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#endif
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#define JI_ID 0
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#define JI_ARCH 1
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#define JI_PATH 2
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#define JI_REC 3
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typedef std::tuple<QString, QString, QString, bool> java_install;
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class JavaUtils
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{
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public:
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JavaUtils();
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QStringList FindJavaPath();
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std::vector<java_install> FindJavaPaths();
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private:
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std::vector<java_install> GetDefaultJava();
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#if WINDOWS
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std::vector<java_install> FindJavaFromRegistryKey(DWORD keyType, QString keyName);
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#endif
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};
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