error handle to all: EncoderException

src/main/java/component/ReadOnlyField.java

@@ -57,7 +57,7 @@ public class ReadOnlyField implements TlvComponentBase, IEncodingAble {
      * @return
      */
     @Override
-    public int wireEncode(Encoder encoder) {
+    public int wireEncode(Encoder encoder) throws EncoderException {
         // 如果只读区没有任何子 TLV，则可以去掉只读区 TLV
         if(this.blocks.length()==0){
             return 0;
@@ -68,23 +68,23 @@ public class ReadOnlyField implements TlvComponentBase, IEncodingAble {
         // 反向遍历，可以保证解码的时候正向输出
         for(int i=this.blocks.length()-1;i>=0;i++){
             int tmplen=encoder.prependBlock(this.blocks.getBlock(i));
-            if(tmplen==0){
-                return 0;
+            if(tmplen<=0){
+                return -1;
             }
             totalLength+=tmplen;
         }
 
         // 编码 TLV-LENGTH
         int tmplen=encoder.prependVarNumber(new VlInt(totalLength));
-        if(tmplen==0){
-            return 0;
+        if(tmplen<=0){
+            return -1;
         }
         totalLength+=tmplen;
 
         // 编码 TLV-TYPE
         tmplen=encoder.prependVarNumber(new VlInt(TLV.TlvReadOnlyField));
-        if(tmplen==0){
-            return 0;
+        if(tmplen<=0){
+            return -1;
         }
         totalLength+=tmplen;