LastSeenMessages.java

net.minecraft.network.chat.LastSeenMessages

信息

• 全限定名：net.minecraft.network.chat.LastSeenMessages
• 类型：public record
• 包：net.minecraft.network.chat
• 源码路径：src/main/java/net/minecraft/network/chat/LastSeenMessages.java
• 起始行号：L13
• 职责：

  TODO

字段/常量

• CODEC

  • 类型: Codec<LastSeenMessages>
  • 修饰符: public static final
  • 源码定位: L14
  • 说明:

    TODO

• EMPTY

  • 类型: LastSeenMessages
  • 修饰符: public static final
  • 源码定位: L15
  • 说明:

    TODO

• LAST_SEEN_MESSAGES_MAX_LENGTH

  • 类型: int
  • 修饰符: public static final
  • 源码定位: L16
  • 说明:

    TODO

内部类/嵌套类型

• net.minecraft.network.chat.LastSeenMessages.Packed

  • 类型: record
  • 修饰符: public
  • 源码定位: L41
  • 说明:

    TODO

• net.minecraft.network.chat.LastSeenMessages.Update

  • 类型: record
  • 修饰符: public
  • 源码定位: L68
  • 说明:

    TODO

构造器

• 无

方法

下面的方法块按源码顺序生成。

public void updateSignature(SignatureUpdater.Output output) @ L18

• 方法名：updateSignature
• 源码定位：L18
• 返回类型：void
• 修饰符：public

参数:

• output: SignatureUpdater.Output

说明:

TODO

public LastSeenMessages.Packed pack(MessageSignatureCache cache) @ L26

• 方法名：pack
• 源码定位：L26
• 返回类型：LastSeenMessages.Packed
• 修饰符：public

参数:

• cache: MessageSignatureCache

说明:

TODO

public byte computeChecksum() @ L30

• 方法名：computeChecksum
• 源码定位：L30
• 返回类型：byte
• 修饰符：public

参数:

• 无

说明:

TODO

代码

public record LastSeenMessages(List<MessageSignature> entries) {
    public static final Codec<LastSeenMessages> CODEC = MessageSignature.CODEC.listOf().xmap(LastSeenMessages::new, LastSeenMessages::entries);
    public static final LastSeenMessages EMPTY = new LastSeenMessages(List.of());
    public static final int LAST_SEEN_MESSAGES_MAX_LENGTH = 20;
 
    public void updateSignature(SignatureUpdater.Output output) throws SignatureException {
        output.update(Ints.toByteArray(this.entries.size()));
 
        for (MessageSignature entry : this.entries) {
            output.update(entry.bytes());
        }
    }
 
    public LastSeenMessages.Packed pack(MessageSignatureCache cache) {
        return new LastSeenMessages.Packed(this.entries.stream().map(entry -> entry.pack(cache)).toList());
    }
 
    public byte computeChecksum() {
        int checksum = 1;
 
        for (MessageSignature entry : this.entries) {
            checksum = 31 * checksum + entry.checksum();
        }
 
        byte checksumByte = (byte)checksum;
        return checksumByte == 0 ? 1 : checksumByte;
    }
 
    public record Packed(List<MessageSignature.Packed> entries) {
        public static final LastSeenMessages.Packed EMPTY = new LastSeenMessages.Packed(List.of());
 
        public Packed(FriendlyByteBuf input) {
            this(input.readCollection(FriendlyByteBuf.<List<MessageSignature.Packed>>limitValue(ArrayList::new, 20), MessageSignature.Packed::read));
        }
 
        public void write(FriendlyByteBuf output) {
            output.writeCollection(this.entries, MessageSignature.Packed::write);
        }
 
        public Optional<LastSeenMessages> unpack(MessageSignatureCache cache) {
            List<MessageSignature> unpacked = new ArrayList<>(this.entries.size());
 
            for (MessageSignature.Packed packed : this.entries) {
                Optional<MessageSignature> entry = packed.unpack(cache);
                if (entry.isEmpty()) {
                    return Optional.empty();
                }
 
                unpacked.add(entry.get());
            }
 
            return Optional.of(new LastSeenMessages(unpacked));
        }
    }
 
    public record Update(int offset, BitSet acknowledged, byte checksum) {
        public static final byte IGNORE_CHECKSUM = 0;
 
        public Update(FriendlyByteBuf input) {
            this(input.readVarInt(), input.readFixedBitSet(20), input.readByte());
        }
 
        public void write(FriendlyByteBuf output) {
            output.writeVarInt(this.offset);
            output.writeFixedBitSet(this.acknowledged, 20);
            output.writeByte(this.checksum);
        }
 
        public boolean verifyChecksum(LastSeenMessages lastSeen) {
            return this.checksum == 0 || this.checksum == lastSeen.computeChecksum();
        }
    }
}

引用的其他类

• MessageSignatureCache

  • 引用位置: 参数

• SignatureUpdater

  • 引用位置: 参数