90 lines
3.9 KiB
Java
90 lines
3.9 KiB
Java
//
|
|
// MIT License
|
|
//
|
|
// Copyright (c) 2020 Alexander Söderberg & Contributors
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in all
|
|
// copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
// SOFTWARE.
|
|
//
|
|
package cloud.commandframework.annotations;
|
|
|
|
import cloud.commandframework.arguments.CommandArgument;
|
|
import cloud.commandframework.context.CommandContext;
|
|
import cloud.commandframework.execution.CommandExecutionHandler;
|
|
import org.checkerframework.checker.nullness.qual.NonNull;
|
|
|
|
import java.lang.invoke.MethodHandle;
|
|
import java.lang.invoke.MethodHandles;
|
|
import java.lang.reflect.Method;
|
|
import java.lang.reflect.Parameter;
|
|
import java.util.ArrayList;
|
|
import java.util.List;
|
|
import java.util.Map;
|
|
|
|
class MethodCommandExecutionHandler<C> implements CommandExecutionHandler<C> {
|
|
|
|
private final Parameter[] parameters;
|
|
private final MethodHandle methodHandle;
|
|
private final Map<String, CommandArgument<C, ?>> commandArguments;
|
|
|
|
MethodCommandExecutionHandler(@NonNull final Object instance,
|
|
@NonNull final Map<@NonNull String,
|
|
@NonNull CommandArgument<@NonNull C, @NonNull ?>> commandArguments,
|
|
@NonNull final Method method) throws Exception {
|
|
this.commandArguments = commandArguments;
|
|
method.setAccessible(true);
|
|
this.methodHandle = MethodHandles.lookup().unreflect(method).bindTo(instance);
|
|
this.parameters = method.getParameters();
|
|
}
|
|
|
|
@Override
|
|
public void execute(@NonNull final CommandContext<C> commandContext) {
|
|
final List<Object> arguments = new ArrayList<>(this.parameters.length);
|
|
|
|
/* Bind parameters to context */
|
|
for (final Parameter parameter : this.parameters) {
|
|
if (parameter.isAnnotationPresent(Argument.class)) {
|
|
final Argument argument = parameter.getAnnotation(Argument.class);
|
|
final CommandArgument<C, ?> commandArgument = this.commandArguments.get(argument.value());
|
|
if (commandArgument.isRequired()) {
|
|
arguments.add(commandContext.getRequired(argument.value()));
|
|
} else {
|
|
final Object optional = commandContext.get(argument.value()).orElse(null);
|
|
arguments.add(optional);
|
|
}
|
|
} else {
|
|
if (parameter.getType().isAssignableFrom(commandContext.getSender().getClass())) {
|
|
arguments.add(commandContext.getSender());
|
|
} else {
|
|
throw new IllegalArgumentException(String.format(
|
|
"Unknown command parameter '%s' in method '%s'",
|
|
parameter.getName(), this.methodHandle.toString()
|
|
));
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Invoke the command method */
|
|
try {
|
|
this.methodHandle.invokeWithArguments(arguments);
|
|
} catch (final Throwable e) {
|
|
e.printStackTrace();
|
|
}
|
|
}
|
|
|
|
}
|