adding protocols buffer

usbserial/src/main/java/com/felhr/utils/ProtocolBuffer.java

@@ -0,0 +1,162 @@
+package com.felhr.utils;
+
+import java.io.UnsupportedEncodingException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class ProtocolBuffer {
+
+    public static final String BINARY = "binary";
+    public static final String TEXT = "text";
+
+    private final String baseRegex1 = "(?<=";
+    private final String baseRegex2 = ")";
+
+    private String mode;
+
+    private String finalRegex;
+
+    private static final int DEFAULT_BUFFER_SIZE = 16 * 1024;
+
+    private String trailChars;
+    private String regex;
+
+    private byte[] rawBuffer;
+    private StringBuilder stringBuffer;
+
+    private List<String> commands = new ArrayList<>();
+
+    public ProtocolBuffer(String mode){
+        this.mode = mode;
+        if(mode.equals(BINARY)){
+            rawBuffer = new byte[DEFAULT_BUFFER_SIZE];
+        }else{
+            stringBuffer = new StringBuilder(DEFAULT_BUFFER_SIZE);
+        }
+    }
+
+    public ProtocolBuffer(String mode, int bufferSize){
+        if(mode.equals(BINARY)){
+            rawBuffer = new byte[bufferSize];
+        }else{
+            stringBuffer = new StringBuilder(bufferSize);
+        }
+    }
+
+    public void setTrailChars(String trailChars){
+        finalRegex = baseRegex1 + adaptTrailChars(trailChars) + baseRegex2;
+    }
+
+    public void setRegex(String regex){
+        finalRegex = regex;
+    }
+
+    public void appendData(byte[] data){
+        if(mode.equals(TEXT)){
+            try {
+                String dataStr = new String(data, "UTF-8");
+                stringBuffer.append(dataStr);
+                String[] splitStr = stringBuffer.toString().split(finalRegex);
+                if(splitStr.length > 1){
+                    commands.addAll(Arrays.asList(splitStr));
+                    stringBuffer.setLength(0);
+                }
+
+            } catch (UnsupportedEncodingException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    private String adaptTrailChars(String trailChars){
+        String tempStr = trailChars;
+
+        if(trailChars.contains("\\")){
+            tempStr = tempStr.replace("\\", "\\\\");
+        }
+
+        if(trailChars.contains(".")){
+            tempStr = tempStr.replace(".", "\\.");
+        }
+
+        if(trailChars.contains("+")){
+            tempStr = tempStr.replace("+", "\\+");
+        }
+
+        if(trailChars.contains("*")){
+            tempStr = tempStr.replace("*", "\\*");
+        }
+
+        if(trailChars.contains("?")){
+            tempStr = tempStr.replace("?", "\\?");
+        }
+
+        if(trailChars.contains("[")){
+            tempStr = tempStr.replace("[", "\\[");
+        }
+
+        if(trailChars.contains("^")){
+            tempStr = tempStr.replace("^", "\\^");
+        }
+
+        if(trailChars.contains("]")){
+            tempStr = tempStr.replace("]", "\\]");
+        }
+
+        if(trailChars.contains("$")){
+            tempStr = tempStr.replace("$", "\\$");
+        }
+
+        if(trailChars.contains("(")){
+            tempStr = tempStr.replace("(", "\\(");
+        }
+
+        if(trailChars.contains(")")){
+            tempStr = tempStr.replace(")", "\\)");
+        }
+
+        if(trailChars.contains("{")){
+            tempStr = tempStr.replace("{", "\\{");
+        }
+
+        if(trailChars.contains("}")){
+            tempStr = tempStr.replace("}", "\\}");
+        }
+
+        if(trailChars.contains("=")){
+            tempStr = tempStr.replace("=", "\\=");
+        }
+
+        if(trailChars.contains("!")){
+            tempStr = tempStr.replace("!", "\\!");
+        }
+
+        if(trailChars.contains("<")) {
+            tempStr = tempStr.replace("<", "\\<");
+        }
+
+        if(trailChars.contains(">")){
+            tempStr = tempStr.replace(">", "\\>");
+        }
+
+        if(trailChars.contains("|")){
+            tempStr = tempStr.replace("|", "\\|");
+        }
+
+        if(trailChars.contains(":")){
+            tempStr = tempStr.replace(":", "\\:");
+        }
+
+        if(trailChars.contains("-")){
+            tempStr = tempStr.replace("-", "\\-");
+        }
+
+        if(trailChars.contains("/")){
+            tempStr = tempStr.replace("/", "\\/");
+        }
+
+        return tempStr;
+    }
+
+}