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Arg.java
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Arg.java
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package net.citizensnpcs.api.command;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import org.bukkit.command.CommandSender;
import com.google.common.collect.Lists;
import net.citizensnpcs.api.command.exception.CommandException;
import net.citizensnpcs.api.npc.NPC;
@Retention(RetentionPolicy.RUNTIME)
@Target(value = { ElementType.PARAMETER })
public @interface Arg {
String[] completions() default {};
Class<? extends CompletionsProvider> completionsProvider() default CompletionsProvider.Identity.class;
String defValue() default "";
Class<? extends FlagValidator<?>> validator() default FlagValidator.Identity.class;
int value();
public static interface CompletionsProvider {
public Collection<String> getCompletions(CommandContext args, CommandSender sender, NPC npc);
public static class Identity implements CompletionsProvider {
@Override
public Collection<String> getCompletions(CommandContext args, CommandSender sender, NPC npc) {
return Collections.emptyList();
}
}
public static abstract class OptionalEnumCompletions implements CompletionsProvider {
private Class<? extends Enum<?>> clazz;
public OptionalEnumCompletions() {
try {
clazz = (Class<? extends Enum<?>>) Class.forName(getEnumClassName());
} catch (ClassNotFoundException e) {
clazz = null;
}
}
@Override
public Collection<String> getCompletions(CommandContext args, CommandSender sender, NPC npc) {
if (clazz == null)
return Collections.emptyList();
return Lists.transform(Arrays.asList(clazz.getEnumConstants()), Enum::name);
}
public abstract String getEnumClassName();
}
}
public static interface FlagValidator<T> {
public T validate(CommandContext args, CommandSender sender, NPC npc, String input) throws CommandException;
public static class Identity implements FlagValidator<String> {
@Override
public String validate(CommandContext args, CommandSender sender, NPC npc, String input)
throws CommandException {
return input;
}
}
}
}