[refactor] do some works

- move gitignore in individual directories.
- change some directory layout.
- refactor NlpCodec but not finished.

NlpParser/.gitignore

@@ -0,0 +1,42 @@
+# ===== Custom =====
+# Only preserve testbench in assets.
+assets/*
+!assets/testbench.txt
+
+# ===== ANTLR Output =====
+*.interp
+*.tokens
+
+Nlp*.java
+
+# ===== Eclipse Java =====
+# Eclipse projects
+.classpath
+.project
+.settings/
+.metadata
+
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+replay_pid*

NlpParser/MainRunner.java

@@ -21,7 +21,7 @@ import java.io.OutputStreamWriter;
 import java.nio.charset.StandardCharsets;
 import java.nio.charset.Charset;
 
-public class NlpRunner {
+public class MainRunner {
 	public static class NlpJsonConverter extends NlpBaseListener {
 		public NlpJsonConverter() {
 			mGsonInstance = new GsonBuilder().setPrettyPrinting().disableHtmlEscaping().create();
@@ -148,7 +148,7 @@ public class NlpRunner {
 	}
 	
 	private static void printHelp() {
-		System.out.println("NlpRunner <src> <dest>");
+		System.out.println("NlpParser <src> <dest>");
 		System.out.println();
 		System.out.println("<src> - the decoded nlp text file.");
 		System.out.println("<dest> - the output json file.");

NlpParser/README.md

@@ -8,9 +8,9 @@ Requirements:
 Useful commands:
 
 * `antlr4 Nlp.g4`: Analyze Antlr format file.
-* `javac Nlp*.java`: Compile executable application.
+* `javac *.java`: Compile executable application.
 * Do testbench
   - `grun Nlp document -tree < testbench.txt`
   - `grun Nlp document -gui < testbench.txt`
-  - `java NlpRunner testbench.txt result.json`
+  - `java MainRunner testbench.txt out/result.json`