diff --git a/src/main/java/org/redkale/convert/Convert.java b/src/main/java/org/redkale/convert/Convert.java
index 74d8a3705..fd7da1600 100644
--- a/src/main/java/org/redkale/convert/Convert.java
+++ b/src/main/java/org/redkale/convert/Convert.java
@@ -46,7 +46,7 @@ public abstract class Convert<R extends Reader, W extends Writer> {
         return writer;
     }
 
-    protected <S extends W> S fieldFunc(S writer, BiFunction<Attribute, Object, Object> objFieldFunc, 
+    protected <S extends W> S fieldFunc(S writer, BiFunction<Attribute, Object, Object> objFieldFunc,
         BiFunction<Object, Object, Object> mapFieldFunc, Function<Object, ConvertField[]> objExtFunc) {
         writer.mapFieldFunc = mapFieldFunc;
         writer.objFieldFunc = objFieldFunc;
@@ -66,7 +66,7 @@ public abstract class Convert<R extends Reader, W extends Writer> {
         return newConvert(objFieldFunc, null, objExtFunc);
     }
 
-    public abstract Convert<R, W> newConvert(BiFunction<Attribute, Object, Object> objFieldFunc, 
+    public abstract Convert<R, W> newConvert(BiFunction<Attribute, Object, Object> objFieldFunc,
         BiFunction<Object, Object, Object> mapFieldFunc, Function<Object, ConvertField[]> objExtFunc);
 
     public abstract boolean isBinary();
@@ -89,8 +89,6 @@ public abstract class Convert<R extends Reader, W extends Writer> {
 
     public abstract <T> T convertFrom(final Type type, final ByteBuffer... buffers);
 
-    public abstract <T> T convertFrom(final Type type, final ConvertMask mask, final ByteBuffer... buffers);
-
     public final void convertTo(final W writer, final Object value) {
         convertTo(writer, (Type) null, value);
     }
diff --git a/src/main/java/org/redkale/convert/ConvertMask.java b/src/main/java/org/redkale/convert/ConvertMask.java
deleted file mode 100644
index 11829f57f..000000000
--- a/src/main/java/org/redkale/convert/ConvertMask.java
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * To change this license header, choose License Headers in Project Properties.
- * To change this template file, choose Tools | Templates
- * and open the template in the editor.
- */
-package org.redkale.convert;
-
-/**
- * Mask接口
- *
- * <p>
- * 详情见: https://redkale.org
- *
- * @author zhangjx
- */
-public interface ConvertMask {
-
-    default byte mask(byte value) {
-        return value;
-    }
-
-    default byte unmask(byte value) {
-        return value;
-    }
-}
diff --git a/src/main/java/org/redkale/convert/bson/BsonByteBufferReader.java b/src/main/java/org/redkale/convert/bson/BsonByteBufferReader.java
index db9ef7896..06e1eb480 100644
--- a/src/main/java/org/redkale/convert/bson/BsonByteBufferReader.java
+++ b/src/main/java/org/redkale/convert/bson/BsonByteBufferReader.java
@@ -26,10 +26,7 @@ public class BsonByteBufferReader extends BsonReader {
 
     private ByteBuffer currentBuffer;
 
-    protected ConvertMask mask;
-
-    protected BsonByteBufferReader(ConvertMask mask, ByteBuffer... buffers) {
-        this.mask = mask;
+    protected BsonByteBufferReader(ByteBuffer... buffers) {
         this.buffers = buffers;
         if (buffers != null && buffers.length > 0) {
             this.currentBuffer = buffers[currentIndex];
@@ -42,13 +39,12 @@ public class BsonByteBufferReader extends BsonReader {
         this.currentIndex = 0;
         this.currentBuffer = null;
         this.buffers = null;
-        this.mask = null;
         return false;
     }
 
     @Override
     protected byte currentByte() {
-        return mask == null ? currentBuffer.get(currentBuffer.position()) : mask.unmask(currentBuffer.get(currentBuffer.position()));
+        return currentBuffer.get(currentBuffer.position());
     }
 
     @Override
@@ -102,13 +98,13 @@ public class BsonByteBufferReader extends BsonReader {
     public byte readByte() {
         if (this.currentBuffer.hasRemaining()) {
             this.position++;
-            return mask == null ? this.currentBuffer.get() : mask.unmask(this.currentBuffer.get());
+            return this.currentBuffer.get();
         }
         for (;;) {
             this.currentBuffer = this.buffers[++this.currentIndex];
             if (this.currentBuffer.hasRemaining()) {
                 this.position++;
-                return mask == null ? this.currentBuffer.get() : mask.unmask(this.currentBuffer.get());
+                return this.currentBuffer.get();
             }
         }
     }
@@ -119,11 +115,7 @@ public class BsonByteBufferReader extends BsonReader {
             int remain = this.currentBuffer.remaining();
             if (remain >= 2) {
                 this.position += 2;
-                if (mask == null) {
-                    return this.currentBuffer.getChar();
-                } else {
-                    return (char) ((0xff00 & (mask.unmask(this.currentBuffer.get()) << 8)) | (0xff & mask.unmask(this.currentBuffer.get())));
-                }
+                return this.currentBuffer.getChar();
             }
         }
         return (char) ((0xff00 & (readByte() << 8)) | (0xff & readByte()));
@@ -135,11 +127,7 @@ public class BsonByteBufferReader extends BsonReader {
             int remain = this.currentBuffer.remaining();
             if (remain >= 2) {
                 this.position += 2;
-                if (mask == null) {
-                    return this.currentBuffer.getShort();
-                } else {
-                    return (short) ((0xff00 & (mask.unmask(this.currentBuffer.get()) << 8)) | (0xff & mask.unmask(this.currentBuffer.get())));
-                }
+                return this.currentBuffer.getShort();
             }
         }
         return (short) ((0xff00 & (readByte() << 8)) | (0xff & readByte()));
@@ -151,14 +139,7 @@ public class BsonByteBufferReader extends BsonReader {
             int remain = this.currentBuffer.remaining();
             if (remain >= 4) {
                 this.position += 4;
-                if (mask == null) {
-                    return this.currentBuffer.getInt();
-                } else {
-                    return ((mask.unmask(this.currentBuffer.get()) & 0xff) << 24)
-                        | ((mask.unmask(this.currentBuffer.get()) & 0xff) << 16)
-                        | ((mask.unmask(this.currentBuffer.get()) & 0xff) << 8)
-                        | (mask.unmask(this.currentBuffer.get()) & 0xff);
-                }
+                return this.currentBuffer.getInt();
             }
         }
         return ((readByte() & 0xff) << 24) | ((readByte() & 0xff) << 16) | ((readByte() & 0xff) << 8) | (readByte() & 0xff);
@@ -170,18 +151,7 @@ public class BsonByteBufferReader extends BsonReader {
             int remain = this.currentBuffer.remaining();
             if (remain >= 8) {
                 this.position += 8;
-                if (mask == null) {
-                    return this.currentBuffer.getLong();
-                } else {
-                    return ((((long) mask.unmask(this.currentBuffer.get()) & 0xff) << 56)
-                        | (((long) mask.unmask(this.currentBuffer.get()) & 0xff) << 48)
-                        | (((long) mask.unmask(this.currentBuffer.get()) & 0xff) << 40)
-                        | (((long) mask.unmask(this.currentBuffer.get()) & 0xff) << 32)
-                        | (((long) mask.unmask(this.currentBuffer.get()) & 0xff) << 24)
-                        | (((long) mask.unmask(this.currentBuffer.get()) & 0xff) << 16)
-                        | (((long) mask.unmask(this.currentBuffer.get()) & 0xff) << 8)
-                        | (((long) mask.unmask(this.currentBuffer.get()) & 0xff)));
-                }
+                return this.currentBuffer.getLong();
             }
         }
         return ((((long) readByte() & 0xff) << 56)
@@ -211,19 +181,9 @@ public class BsonByteBufferReader extends BsonReader {
         if (remain >= len) {
             this.position += len;
             this.currentBuffer.get(bs, pos, len);
-            if (mask != null) {
-                for (int i = pos, end = pos + len; i < end; i++) {
-                    bs[i] = mask.unmask(bs[i]);
-                }
-            }
             return;
         }
         this.currentBuffer.get(bs, pos, remain);
-        if (mask != null) {
-            for (int i = pos, end = pos + remain; i < end; i++) {
-                bs[i] = mask.unmask(bs[i]);
-            }
-        }
         this.position += remain;
         this.currentBuffer = this.buffers[++this.currentIndex];
         read(bs, pos + remain);
diff --git a/src/main/java/org/redkale/convert/bson/BsonConvert.java b/src/main/java/org/redkale/convert/bson/BsonConvert.java
index 21e5ba2fe..9edbfe8cb 100644
--- a/src/main/java/org/redkale/convert/bson/BsonConvert.java
+++ b/src/main/java/org/redkale/convert/bson/BsonConvert.java
@@ -86,7 +86,7 @@ public class BsonConvert extends BinaryConvert<BsonReader, BsonWriter> {
 
     //------------------------------ reader -----------------------------------------------------------
     public BsonReader pollReader(final ByteBuffer... buffers) {
-        return new BsonByteBufferReader((ConvertMask) null, buffers);
+        return new BsonByteBufferReader(buffers);
     }
 
     public BsonReader pollReader(final InputStream in) {
@@ -175,16 +175,7 @@ public class BsonConvert extends BinaryConvert<BsonReader, BsonWriter> {
         if (type == null || buffers.length < 1) {
             return null;
         }
-        return (T) factory.loadDecoder(type).convertFrom(new BsonByteBufferReader((ConvertMask) null, buffers));
-    }
-
-    @Override
-    @SuppressWarnings("unchecked")
-    public <T> T convertFrom(final Type type, final ConvertMask mask, final ByteBuffer... buffers) {
-        if (type == null || buffers.length < 1) {
-            return null;
-        }
-        return (T) factory.loadDecoder(type).convertFrom(new BsonByteBufferReader(mask, buffers));
+        return (T) factory.loadDecoder(type).convertFrom(new BsonByteBufferReader(buffers));
     }
 
     @Override
diff --git a/src/main/java/org/redkale/convert/bson/BsonStreamReader.java b/src/main/java/org/redkale/convert/bson/BsonStreamReader.java
index b717e61a9..7df5f26bd 100644
--- a/src/main/java/org/redkale/convert/bson/BsonStreamReader.java
+++ b/src/main/java/org/redkale/convert/bson/BsonStreamReader.java
@@ -21,7 +21,7 @@ class BsonStreamReader extends BsonByteBufferReader {
     private byte currByte;
 
     protected BsonStreamReader(InputStream in) {
-        super((ConvertMask) null);
+        super();
         this.in = in;
     }
 
diff --git a/src/main/java/org/redkale/convert/json/JsonByteBufferReader.java b/src/main/java/org/redkale/convert/json/JsonByteBufferReader.java
index b25930e4d..ab89f63f4 100644
--- a/src/main/java/org/redkale/convert/json/JsonByteBufferReader.java
+++ b/src/main/java/org/redkale/convert/json/JsonByteBufferReader.java
@@ -29,10 +29,7 @@ public class JsonByteBufferReader extends JsonReader {
 
     private ByteBuffer currentBuffer;
 
-    protected ConvertMask mask;
-
-    protected JsonByteBufferReader(ConvertMask mask, ByteBuffer... buffers) {
-        this.mask = mask;
+    protected JsonByteBufferReader(ByteBuffer... buffers) {
         this.buffers = buffers;
         if (buffers != null && buffers.length > 0) {
             this.currentBuffer = buffers[currentIndex];
@@ -46,20 +43,19 @@ public class JsonByteBufferReader extends JsonReader {
         this.buffers = null;
         this.currentIndex = 0;
         this.currentBuffer = null;
-        this.mask = null;
         return false;
     }
 
     protected byte nextByte() {
         if (this.currentBuffer.hasRemaining()) {
             this.position++;
-            return mask == null ? this.currentBuffer.get() : mask.unmask(this.currentBuffer.get());
+            return this.currentBuffer.get();
         }
         for (;;) {
             this.currentBuffer = this.buffers[++this.currentIndex];
             if (this.currentBuffer.hasRemaining()) {
                 this.position++;
-                return mask == null ? this.currentBuffer.get() : mask.unmask(this.currentBuffer.get());
+                return this.currentBuffer.get();
             }
         }
     }
diff --git a/src/main/java/org/redkale/convert/json/JsonConvert.java b/src/main/java/org/redkale/convert/json/JsonConvert.java
index 6cedc43ef..f6f2b129b 100644
--- a/src/main/java/org/redkale/convert/json/JsonConvert.java
+++ b/src/main/java/org/redkale/convert/json/JsonConvert.java
@@ -207,20 +207,7 @@ public class JsonConvert extends TextConvert<JsonReader, JsonWriter> {
             decoder = factory.loadDecoder(type);
             this.lastConvertDecodeable = decoder;
         }
-        return (T) decoder.convertFrom(new JsonByteBufferReader((ConvertMask) null, buffers));
-    }
-
-    @Override
-    public <T> T convertFrom(final Type type, final ConvertMask mask, final ByteBuffer... buffers) {
-        if (type == null || buffers == null || buffers.length == 0) {
-            return null;
-        }
-        Decodeable decoder = this.lastConvertDecodeable;
-        if (decoder == null || decoder.getType() != type) {
-            decoder = factory.loadDecoder(type);
-            this.lastConvertDecodeable = decoder;
-        }
-        return (T) decoder.convertFrom(new JsonByteBufferReader(mask, buffers));
+        return (T) decoder.convertFrom(new JsonByteBufferReader(buffers));
     }
 
     @Override
@@ -279,15 +266,7 @@ public class JsonConvert extends TextConvert<JsonReader, JsonWriter> {
         if (buffers == null || buffers.length == 0) {
             return null;
         }
-        return (V) new AnyDecoder(factory).convertFrom(new JsonByteBufferReader((ConvertMask) null, buffers));
-    }
-
-    //返回非null的值是由String、ArrayList、HashMap任意组合的对象
-    public <V> V convertFrom(final ConvertMask mask, final ByteBuffer... buffers) {
-        if (buffers == null || buffers.length == 0) {
-            return null;
-        }
-        return (V) new AnyDecoder(factory).convertFrom(new JsonByteBufferReader(mask, buffers));
+        return (V) new AnyDecoder(factory).convertFrom(new JsonByteBufferReader(buffers));
     }
 
     //返回非null的值是由String、ArrayList、HashMap任意组合的对象
diff --git a/src/main/java/org/redkale/convert/json/JsonStreamReader.java b/src/main/java/org/redkale/convert/json/JsonStreamReader.java
index bd9a6186e..cfbc0b8dd 100644
--- a/src/main/java/org/redkale/convert/json/JsonStreamReader.java
+++ b/src/main/java/org/redkale/convert/json/JsonStreamReader.java
@@ -19,7 +19,7 @@ class JsonStreamReader extends JsonByteBufferReader {
     private InputStream in;
 
     protected JsonStreamReader(InputStream in) {
-        super((ConvertMask) null);
+        super();
         this.in = in;
     }
 
diff --git a/src/main/java/org/redkale/convert/protobuf/ProtobufByteBufferReader.java b/src/main/java/org/redkale/convert/protobuf/ProtobufByteBufferReader.java
index e4619394c..f1306ef9e 100644
--- a/src/main/java/org/redkale/convert/protobuf/ProtobufByteBufferReader.java
+++ b/src/main/java/org/redkale/convert/protobuf/ProtobufByteBufferReader.java
@@ -6,7 +6,6 @@
 package org.redkale.convert.protobuf;
 
 import java.nio.ByteBuffer;
-import org.redkale.convert.*;
 
 /**
  *
@@ -20,10 +19,7 @@ public class ProtobufByteBufferReader extends ProtobufReader {
 
     private ByteBuffer currentBuffer;
 
-    protected ConvertMask mask;
-
-    protected ProtobufByteBufferReader(ConvertMask mask, ByteBuffer... buffers) {
-        this.mask = mask;
+    protected ProtobufByteBufferReader(ByteBuffer... buffers) {
         this.buffers = buffers;
         if (buffers != null && buffers.length > 0) this.currentBuffer = buffers[currentIndex];
     }
@@ -34,25 +30,24 @@ public class ProtobufByteBufferReader extends ProtobufReader {
         this.currentIndex = 0;
         this.currentBuffer = null;
         this.buffers = null;
-        this.mask = null;
         return false;
     }
 
     @Override
     protected byte currentByte() {
-        return mask == null ? currentBuffer.get(currentBuffer.position()) : mask.unmask(currentBuffer.get(currentBuffer.position()));
+        return currentBuffer.get(currentBuffer.position());
     }
 
     protected byte nextByte() {
         if (this.currentBuffer.hasRemaining()) {
             this.position++;
-            return mask == null ? this.currentBuffer.get() : mask.unmask(this.currentBuffer.get());
+            return this.currentBuffer.get();
         }
         for (;;) {
             this.currentBuffer = this.buffers[++this.currentIndex];
             if (this.currentBuffer.hasRemaining()) {
                 this.position++;
-                return mask == null ? this.currentBuffer.get() : mask.unmask(this.currentBuffer.get());
+                return this.currentBuffer.get();
             }
         }
     }
diff --git a/src/main/java/org/redkale/convert/protobuf/ProtobufConvert.java b/src/main/java/org/redkale/convert/protobuf/ProtobufConvert.java
index f6d1e6c3e..87df6972c 100644
--- a/src/main/java/org/redkale/convert/protobuf/ProtobufConvert.java
+++ b/src/main/java/org/redkale/convert/protobuf/ProtobufConvert.java
@@ -534,27 +534,7 @@ public class ProtobufConvert extends BinaryConvert<ProtobufReader, ProtobufWrite
         if (!(decoder instanceof ObjectDecoder)) {
             throw new ConvertException(this.getClass().getSimpleName() + " not supported type(" + type + ")");
         }
-        return (T) decoder.convertFrom(new ProtobufByteBufferReader((ConvertMask) null, buffers));
-    }
-
-    @Override
-    @SuppressWarnings("unchecked")
-    public <T> T convertFrom(final Type type, final ConvertMask mask, final ByteBuffer... buffers) {
-        if (true) {
-            throw new ConvertException(this.getClass().getSimpleName() + " not supported convertFrom ByteBuffer");
-        }
-        if (type == null || buffers.length < 1) {
-            return null;
-        }
-        Decodeable decoder = this.lastConvertDecodeable;
-        if (decoder == null || decoder.getType() != type) {
-            decoder = factory.loadDecoder(type);
-            this.lastConvertDecodeable = decoder;
-        }
-        if (!(decoder instanceof ObjectDecoder)) {
-            throw new ConvertException(this.getClass().getSimpleName() + " not supported type(" + type + ")");
-        }
-        return (T) decoder.convertFrom(new ProtobufByteBufferReader(mask, buffers));
+        return (T) decoder.convertFrom(new ProtobufByteBufferReader(buffers));
     }
 
     @Override
diff --git a/src/main/java/org/redkale/convert/protobuf/ProtobufStreamReader.java b/src/main/java/org/redkale/convert/protobuf/ProtobufStreamReader.java
index 3f18934e3..a4b2e97d6 100644
--- a/src/main/java/org/redkale/convert/protobuf/ProtobufStreamReader.java
+++ b/src/main/java/org/redkale/convert/protobuf/ProtobufStreamReader.java
@@ -21,7 +21,7 @@ class ProtobufStreamReader extends ProtobufByteBufferReader {
     private byte currByte;
 
     protected ProtobufStreamReader(InputStream in) {
-        super((ConvertMask) null);
+        super();
         this.in = in;
     }