From 5fc080ca6cca33206c5b7d746ff22bafb3a62976 Mon Sep 17 00:00:00 2001 From: free will <2647778488@qq.com> Date: Thu, 18 Mar 2021 10:21:52 +0800 Subject: [PATCH] error handle: EncoderException --- src/main/java/encoding/Encoder.java | 48 ++++++++++---------- src/main/java/encoding/EncoderException.java | 14 ++++++ src/main/java/encoding/VlInt.java | 4 +- src/main/java/encoding/VlIntException.java | 2 +- 4 files changed, 41 insertions(+), 27 deletions(-) create mode 100644 src/main/java/encoding/EncoderException.java diff --git a/src/main/java/encoding/Encoder.java b/src/main/java/encoding/Encoder.java index f38fe34..be1e361 100644 --- a/src/main/java/encoding/Encoder.java +++ b/src/main/java/encoding/Encoder.java @@ -36,9 +36,9 @@ public class Encoder { * @param reserveFromBack 默认情况下，左右指针都指向数组的最右侧，表示totalReserve指定的所有空间都是预留给 Prepend* 操作的 * reserveFromBack 可以指定需要预留多少空间给 Append*操作 */ - public boolean encoderReset(SizeT totalReserve,SizeT reserveFromBack){ + public boolean encoderReset(SizeT totalReserve,SizeT reserveFromBack) throws EncoderException{ if(reserveFromBack.compareTo(totalReserve)>0){ - return false; + throw new EncoderException("encoderReset: reserveFromBack > totalReserve"); } this.isInitial=true; this.isEstimator=false; @@ -47,7 +47,7 @@ public class Encoder { try { len=totalReserve.getVlIntValue2Int(); } catch (VlIntException e) { - throw new Error("Encoder.encoderReset: "+e.getMessage()); + throw new EncoderException("encoderReset: "+e.getMessage()); } this.buffer=new byte[len]; //todo: 特殊情况下，可能越界。 this.left= (int) (totalReserve.subtract(reserveFromBack)-1);//todo: 特殊情况下，可能越界。 @@ -106,7 +106,7 @@ public class Encoder { this.left--; return 1; }else{ - return 0; + return -1; } } @@ -124,7 +124,7 @@ public class Encoder { this.right++; return 1; }else{ - return 0; + return -1; } } @@ -153,7 +153,7 @@ public class Encoder { * @param uint64_value * @return */ - public int prependNonNegativeInteger(long uint64_value){ + public int prependNonNegativeInteger(long uint64_value) throws EncoderException { byte[] bytes=buildNonNegativeIntegerArr(uint64_value); return this.prependByteArray(bytes,new SizeT(bytes.length)); } @@ -164,7 +164,7 @@ public class Encoder { * @param uint64_value * @return */ - public int appendNonNegativeInteger(long uint64_value){ + public int appendNonNegativeInteger(long uint64_value) throws EncoderException { byte[] bytes=buildNonNegativeIntegerArr(uint64_value); return this.appendByteArray(bytes,new SizeT(bytes.length)); } @@ -174,31 +174,31 @@ public class Encoder { * @param size * @return 返回插入成功的字节数 */ - public int prependByteArray(byte[] array,SizeT size){ + public int prependByteArray(byte[] array,SizeT size) throws EncoderException { if(check(size)&&(size.compareTo(array.length)<=0)){ if(this.isEstimator){ this.left-=array.length; try { return size.getVlIntValue2Int(); } catch (VlIntException e) { - throw new Error("Encoder.prependByteArray: "+e.getMessage()); + throw new EncoderException("prependByteArray: "+e.getMessage()); } }else{ try { System.arraycopy(array,0,this.buffer, this.left-size.getVlIntValue2Int()+1,size.getVlIntValue2Int()); } catch (VlIntException e) { - throw new Error("Encoder.prependByteArray: "+e.getMessage()); + throw new EncoderException("prependByteArray: "+e.getMessage()); } this.left-=array.length; try { return size.getVlIntValue2Int(); } catch (VlIntException e) { - throw new Error("Encoder.prependByteArray: "+e.getMessage()); + throw new EncoderException("prependByteArray: "+e.getMessage()); } } } - return 0; + return -1; } /** @@ -206,31 +206,31 @@ public class Encoder { * @param size * @return 返回插入成功的字节数 */ - public int appendByteArray(byte[] array,SizeT size){ + public int appendByteArray(byte[] array,SizeT size) throws EncoderException { if(check(size)&&(size.compareTo(array.length)<=0)){ if(this.isEstimator){ this.right+=array.length; try { return size.getVlIntValue2Int(); } catch (VlIntException e) { - throw new Error("Encoder.appendByteArray: "+e.getMessage()); + throw new EncoderException("appendByteArray: "+e.getMessage()); } }else{ try { System.arraycopy(array,0,this.buffer, this.right,size.getVlIntValue2Int()); } catch (VlIntException e) { - throw new Error("Encoder.appendByteArray: "+e.getMessage()); + throw new EncoderException("appendByteArray: "+e.getMessage()); } this.right+=array.length; try { return size.getVlIntValue2Int(); } catch (VlIntException e) { - throw new Error("Encoder.appendByteArray: "+e.getMessage()); + throw new EncoderException("appendByteArray: "+e.getMessage()); } } } - return 0; + return -1; } /** @@ -238,7 +238,7 @@ public class Encoder { * @param varNumber * @return */ - public int prependVarNumber(VlInt varNumber){ + public int prependVarNumber(VlInt varNumber) throws EncoderException { return this.prependByteArray(varNumber.getVlIntBytes(),new SizeT(varNumber.size())); } @@ -247,7 +247,7 @@ public class Encoder { * @param varNumber * @return */ - public int appendVarNumber(VlInt varNumber){ + public int appendVarNumber(VlInt varNumber) throws EncoderException { return this.appendByteArray(varNumber.getVlIntBytes(),new SizeT(varNumber.size())); } @@ -260,7 +260,7 @@ public class Encoder { * @param size * @return */ - public int prependByteArrayBlock(VlInt tlvType,byte[] array,SizeT size){ + public int prependByteArrayBlock(VlInt tlvType,byte[] array,SizeT size) throws EncoderException { int totalLength=this.prependByteArray(array,size); totalLength+=this.prependVarNumber(new VlInt(size)); totalLength+=this.prependVarNumber(tlvType); @@ -274,12 +274,12 @@ public class Encoder { * @param size * @return */ - public int appendByteArrayBlock(VlInt tlvType,byte[] array,SizeT size){ + public int appendByteArrayBlock(VlInt tlvType,byte[] array,SizeT size) throws EncoderException { int totalLength=this.appendByteArray(array,size); try { totalLength+=this.appendVarNumber(new VlInt(size.getVlIntValue2Long())); } catch (VlIntException e) { - throw new Error("Encoder.appendByteArrayBlock: "+e.getMessage()); + throw new EncoderException("appendByteArrayBlock: "+e.getMessage()); } totalLength+=this.appendVarNumber(tlvType); return totalLength; @@ -290,7 +290,7 @@ public class Encoder { * @param block * @return */ - public int prependBlock(Block block){ + public int prependBlock(Block block) throws EncoderException { return this.prependByteArrayBlock(block.getType(),block.getValue(),new SizeT(block.getLength())); } @@ -299,7 +299,7 @@ public class Encoder { * @param block * @return */ - public int appendBlock(Block block){ + public int appendBlock(Block block) throws EncoderException { return this.appendByteArrayBlock(block.getType(),block.getValue(),new SizeT(block.getLength())); } diff --git a/src/main/java/encoding/EncoderException.java b/src/main/java/encoding/EncoderException.java new file mode 100644 index 0000000..8e75d60 --- /dev/null +++ b/src/main/java/encoding/EncoderException.java @@ -0,0 +1,14 @@ +package encoding; + +/* + * @Author: Wang Feng + * @Description: + * @Version: 1.0.0 + * @Date: 9:46 2021/3/18 + * @Copyright: MIN-Group；国家重大科技基础设施——未来网络北大实验室；深圳市信息论与未来网络重点实验室 + */ +public class EncoderException extends Exception{ + public EncoderException(String msg){ + super("Encoder."+msg); + } +} diff --git a/src/main/java/encoding/VlInt.java b/src/main/java/encoding/VlInt.java index c97a871..229c6b1 100644 --- a/src/main/java/encoding/VlInt.java +++ b/src/main/java/encoding/VlInt.java @@ -198,7 +198,7 @@ public class VlInt { if(this.size()<4){ return VlIntValue.intValue(); } - throw new VlIntException("value大于int能表示的范围"); + throw new VlIntException("getVlIntValue2Int: out of int bound."); } /** @@ -210,7 +210,7 @@ public class VlInt { if(this.size()<= 9){ return VlIntValue.longValue(); } - throw new VlIntException("value大于long能表示的范围"); + throw new VlIntException("getVlIntValue2Long: out of long bound."); } /** diff --git a/src/main/java/encoding/VlIntException.java b/src/main/java/encoding/VlIntException.java index 91b6319..62a4b08 100644 --- a/src/main/java/encoding/VlIntException.java +++ b/src/main/java/encoding/VlIntException.java @@ -9,6 +9,6 @@ package encoding; */ public class VlIntException extends Exception{ public VlIntException(String msg){ - super(msg); + super("VlInt."+msg); } }