OperationArgument.java

net.minecraft.commands.arguments.OperationArgument

信息

• 全限定名：net.minecraft.commands.arguments.OperationArgument
• 类型：public class
• 包：net.minecraft.commands.arguments
• 源码路径：src/main/java/net/minecraft/commands/arguments/OperationArgument.java
• 起始行号：L19
• 实现：ArgumentType<OperationArgument.Operation>
• 职责：

  TODO

字段/常量

• EXAMPLES

  • 类型: Collection<String>
  • 修饰符: private static final
  • 源码定位: L20
  • 说明:

    TODO

• ERROR_INVALID_OPERATION

  • 类型: SimpleCommandExceptionType
  • 修饰符: private static final
  • 源码定位: L21
  • 说明:

    TODO

• ERROR_DIVIDE_BY_ZERO

  • 类型: SimpleCommandExceptionType
  • 修饰符: private static final
  • 源码定位: L24
  • 说明:

    TODO

内部类/嵌套类型

• net.minecraft.commands.arguments.OperationArgument.Operation

  • 类型: interface
  • 修饰符: public
  • 源码定位: L93
  • 说明:

    TODO

• net.minecraft.commands.arguments.OperationArgument.SimpleOperation

  • 类型: interface
  • 修饰符: private
  • 源码定位: L98
  • 说明:

    TODO

构造器

• 无

方法

下面的方法块按源码顺序生成。

public static OperationArgument operation() @ L26

• 方法名：operation
• 源码定位：L26
• 返回类型：OperationArgument
• 修饰符：public static

参数:

• 无

说明:

TODO

public static OperationArgument.Operation getOperation(CommandContext<CommandSourceStack> context, String name) @ L30

• 方法名：getOperation
• 源码定位：L30
• 返回类型：OperationArgument.Operation
• 修饰符：public static

参数:

• context: CommandContext
• name: String

说明:

TODO

public OperationArgument.Operation parse(StringReader reader) @ L34

• 方法名：parse
• 源码定位：L34
• 返回类型：OperationArgument.Operation
• 修饰符：public

参数:

• reader: StringReader

说明:

TODO

public <S> CompletableFuture<Suggestions> listSuggestions(CommandContext<S> context, SuggestionsBuilder builder) @ L48

• 方法名：listSuggestions
• 源码定位：L48
• 返回类型： CompletableFuture
• 修饰符：public

参数:

• context: CommandContext
• builder: SuggestionsBuilder

说明:

TODO

public Collection<String> getExamples() @ L53

• 方法名：getExamples
• 源码定位：L53
• 返回类型：Collection
• 修饰符：public

参数:

• 无

说明:

TODO

private static OperationArgument.Operation getOperation(String op) @ L58

• 方法名：getOperation
• 源码定位：L58
• 返回类型：OperationArgument.Operation
• 修饰符：private static

参数:

• op: String

说明:

TODO

private static OperationArgument.SimpleOperation getSimpleOperation(String op) @ L66

• 方法名：getSimpleOperation
• 源码定位：L66
• 返回类型：OperationArgument.SimpleOperation
• 修饰符：private static

参数:

• op: String

说明:

TODO

代码

public class OperationArgument implements ArgumentType<OperationArgument.Operation> {
    private static final Collection<String> EXAMPLES = Arrays.asList("=", ">", "<");
    private static final SimpleCommandExceptionType ERROR_INVALID_OPERATION = new SimpleCommandExceptionType(
        Component.translatable("arguments.operation.invalid")
    );
    private static final SimpleCommandExceptionType ERROR_DIVIDE_BY_ZERO = new SimpleCommandExceptionType(Component.translatable("arguments.operation.div0"));
 
    public static OperationArgument operation() {
        return new OperationArgument();
    }
 
    public static OperationArgument.Operation getOperation(CommandContext<CommandSourceStack> context, String name) {
        return context.getArgument(name, OperationArgument.Operation.class);
    }
 
    public OperationArgument.Operation parse(StringReader reader) throws CommandSyntaxException {
        if (!reader.canRead()) {
            throw ERROR_INVALID_OPERATION.createWithContext(reader);
        } else {
            int start = reader.getCursor();
 
            while (reader.canRead() && reader.peek() != ' ') {
                reader.skip();
            }
 
            return getOperation(reader.getString().substring(start, reader.getCursor()));
        }
    }
 
    @Override
    public <S> CompletableFuture<Suggestions> listSuggestions(CommandContext<S> context, SuggestionsBuilder builder) {
        return SharedSuggestionProvider.suggest(new String[]{"=", "+=", "-=", "*=", "/=", "%=", "<", ">", "><"}, builder);
    }
 
    @Override
    public Collection<String> getExamples() {
        return EXAMPLES;
    }
 
    private static OperationArgument.Operation getOperation(String op) throws CommandSyntaxException {
        return (OperationArgument.Operation)(op.equals("><") ? (OperationArgument.Operation)(a, b) -> {
            int swap = a.get();
            a.set(b.get());
            b.set(swap);
        } : getSimpleOperation(op));
    }
 
    private static OperationArgument.SimpleOperation getSimpleOperation(String op) throws CommandSyntaxException {
        return switch (op) {
            case "=" -> (a, b) -> b;
            case "+=" -> Integer::sum;
            case "-=" -> (a, b) -> a - b;
            case "*=" -> (a, b) -> a * b;
            case "/=" -> (a, b) -> {
                if (b == 0) {
                    throw ERROR_DIVIDE_BY_ZERO.create();
                } else {
                    return Mth.floorDiv(a, b);
                }
            };
            case "%=" -> (a, b) -> {
                if (b == 0) {
                    throw ERROR_DIVIDE_BY_ZERO.create();
                } else {
                    return Mth.positiveModulo(a, b);
                }
            };
            case "<" -> Math::min;
            case ">" -> Math::max;
            default -> throw ERROR_INVALID_OPERATION.create();
        };
    }
 
    @FunctionalInterface
    public interface Operation {
        void apply(ScoreAccess a, ScoreAccess b) throws CommandSyntaxException;
    }
 
    @FunctionalInterface
    private interface SimpleOperation extends OperationArgument.Operation {
        int apply(int a, int b) throws CommandSyntaxException;
 
        @Override
        default void apply(ScoreAccess a, ScoreAccess b) throws CommandSyntaxException {
            a.set(this.apply(a.get(), b.get()));
        }
    }
}

引用的其他类

• CommandSourceStack

  • 引用位置: 参数

• SharedSuggestionProvider

  • 引用位置: 方法调用
  • 关联成员: SharedSuggestionProvider.suggest()

• Component

  • 引用位置: 方法调用
  • 关联成员: Component.translatable()

• Mth

  • 引用位置: 方法调用
  • 关联成员: Mth.floorDiv(), Mth.positiveModulo()