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/* Copyright 2012-2021 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.
*/
package org.prismlauncher.impl;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.prismlauncher.Launcher;
import org.prismlauncher.exception.ParseException;
import org.prismlauncher.utils.Parameters;
public abstract class AbstractLauncher implements Launcher {
private static final int DEFAULT_WINDOW_WIDTH = 854;
private static final int DEFAULT_WINDOW_HEIGHT = 480;
// parameters, separated from ParamBucket
protected final List<String> mcParams;
private final String mainClass;
// secondary parameters
protected final int width;
protected final int height;
protected final boolean maximize;
protected final String serverAddress, serverPort;
protected final ClassLoader classLoader;
public AbstractLauncher(Parameters params) {
classLoader = ClassLoader.getSystemClassLoader();
mcParams = params.allSafe("param", new ArrayList<String>());
mainClass = params.firstSafe("mainClass", "net.minecraft.client.Minecraft");
serverAddress = params.firstSafe("serverAddress", null);
serverPort = params.firstSafe("serverPort", null);
String windowParams = params.firstSafe("windowParams", null);
if ("max".equals(windowParams) || windowParams == null) {
maximize = windowParams != null;
width = DEFAULT_WINDOW_WIDTH;
height = DEFAULT_WINDOW_HEIGHT;
} else {
maximize = false;
int byIndex = windowParams.indexOf('x');
if (byIndex != -1) {
try {
width = Integer.parseInt(windowParams.substring(0, byIndex));
height = Integer.parseInt(windowParams.substring(byIndex + 1));
return;
} catch(NumberFormatException pass) {
}
}
throw new ParseException("Invalid window size parameter value: " + windowParams);
}
}
protected Class<?> loadMain() throws ClassNotFoundException {
return classLoader.loadClass(mainClass);
}
protected void loadAndInvokeMain() throws Throwable, ClassNotFoundException {
invokeMain(loadMain());
}
protected void invokeMain(Class<?> mainClass) throws Throwable {
MethodHandle method = MethodHandles.lookup().findStatic(mainClass, "main", MethodType.methodType(void.class, String[].class));
method.invokeExact(mcParams.toArray(new String[0]));
}
}
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