GH-907 improve Java testing and PermGen deprecation handling

logic/settings/PassthroughSetting.cpp

@@ -0,0 +1,66 @@
+/* Copyright 2013-2015 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 "PassthroughSetting.h"
+
+PassthroughSetting::PassthroughSetting(std::shared_ptr<Setting> other, std::shared_ptr<Setting> gate)
+	: Setting(other->configKeys(), QVariant())
+{
+	Q_ASSERT(other);
+	Q_ASSERT(gate);
+	m_other = other;
+	m_gate = gate;
+}
+
+bool PassthroughSetting::isOverriding() const
+{
+	return m_gate->get().toBool();
+}
+
+QVariant PassthroughSetting::defValue() const
+{
+	if(isOverriding())
+	{
+		return m_other->get();
+	}
+	return m_other->defValue();
+}
+
+QVariant PassthroughSetting::get() const
+{
+	if(isOverriding())
+	{
+		return Setting::get();
+	}
+	return m_other->get();
+}
+
+void PassthroughSetting::reset()
+{
+	if(isOverriding())
+	{
+		Setting::reset();
+	}
+	m_other->reset();
+}
+
+void PassthroughSetting::set(QVariant value)
+{
+	if(isOverriding())
+	{
+		Setting::set(value);
+	}
+	m_other->set(value);
+}

logic/settings/PassthroughSetting.h

@@ -0,0 +1,45 @@
+/* Copyright 2013-2015 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.
+ */
+
+#pragma once
+
+#include <QObject>
+#include <memory>
+
+#include "Setting.h"
+
+/*!
+ * \brief A setting that 'overrides another.' based on the value of a 'gate' setting
+ * If 'gate' evaluates to true, the override stores and returns data
+ * If 'gate' evaluates to false, the original does,
+ */
+class PassthroughSetting : public Setting
+{
+	Q_OBJECT
+public:
+	explicit PassthroughSetting(std::shared_ptr<Setting> overriden, std::shared_ptr<Setting> gate);
+
+	virtual QVariant defValue() const;
+	virtual QVariant get() const;
+	virtual void set (QVariant value);
+	virtual void reset();
+
+private:
+	bool isOverriding() const;
+
+protected:
+	std::shared_ptr<Setting> m_other;
+	std::shared_ptr<Setting> m_gate;
+};

logic/settings/SettingsObject.cpp

@@ -16,6 +16,7 @@
 #include "settings/SettingsObject.h"
 #include "settings/Setting.h"
 #include "settings/OverrideSetting.h"
+#include "PassthroughSetting.h"
 #include <QDebug>
 
 #include <QVariant>
@@ -44,6 +45,22 @@ std::shared_ptr<Setting> SettingsObject::registerOverride(std::shared_ptr<Settin
 	return override;
 }
 
+std::shared_ptr<Setting> SettingsObject::registerPassthrough(std::shared_ptr<Setting> original,
+															 std::shared_ptr<Setting> gate)
+{
+	if (contains(original->id()))
+	{
+		qCritical() << QString("Failed to register setting %1. ID already exists.")
+				   .arg(original->id());
+		return nullptr; // Fail
+	}
+	auto passthrough = std::make_shared<PassthroughSetting>(original, gate);
+	passthrough->m_storage = this;
+	connectSignals(*passthrough);
+	m_settings.insert(passthrough->id(), passthrough);
+	return passthrough;
+}
+
 std::shared_ptr<Setting> SettingsObject::registerSetting(QStringList synonyms, QVariant defVal)
 {
 	if (synonyms.empty())

logic/settings/SettingsObject.h

@@ -50,6 +50,16 @@ public:
 	 */
 	std::shared_ptr<Setting> registerOverride(std::shared_ptr<Setting> original);
 
+	/*!
+	 * Registers a passthorugh setting for the given original setting in this settings object
+	 * gate decides if the passthrough (true) or the original (false) is used for value
+	 *
+	 * This will fail if there is already a setting with the same ID as
+	 * the one that is being registered.
+	 * \return A valid Setting shared pointer if successful.
+	 */
+	std::shared_ptr<Setting> registerPassthrough(std::shared_ptr<Setting> original, std::shared_ptr<Setting> gate);
+
 	/*!
 	 * Registers the given setting with this SettingsObject and connects the necessary  signals.
 	 *