error handle to all: EncoderException

src/main/java/component/CanBePrefix.java

@@ -43,25 +43,25 @@ public class CanBePrefix implements TlvComponentBase,InitialAble, IEncodingAble
      * @return
      */
     @Override
-    public int wireEncode(Encoder encoder) {
+    public int wireEncode(Encoder encoder) throws EncoderException {
         // 这是一个存在性组件，所以如果值为false，则无需编码
         if(!this.canBePrefix){
-            return 0;
+            return -1;
         }
 
         int totalLength=0;
 
         // 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.TlvCanBePrefix));
-        if(tmplen==0){
-            return 0;
+        if(tmplen<=0){
+            return -1;
         }
         totalLength+=tmplen;