Initial ANTLR grammar

parser/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>nu.zoom.dsl</groupId>
+        <artifactId>endgen</artifactId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+
+    <groupId>nu.zoom.dsl</groupId>
+    <artifactId>parser</artifactId>
+    <dependencies>
+        <dependency>
+            <groupId>org.antlr</groupId>
+            <artifactId>antlr4-runtime</artifactId>
+            <version>4.13.0</version>
+        </dependency>
+    </dependencies>
+    <build>
+        <plugins>
+            <!-- This plugin sets up maven to use Java 7 -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.13.0</version>
+                <configuration>
+                    <source>24</source>
+                    <target>24</target>
+                </configuration>
+            </plugin>
+            <!-- Plugin to compile the g4 files ahead of the java files
+                 See https://github.com/antlr/antlr4/blob/master/antlr4-maven-plugin/src/site/apt/examples/simple.apt.vm
+                 Except that the grammar does not need to contain the package declaration as stated in the documentation (I do not know why)
+                 To use this plugin, type:
+                   mvn antlr4:antlr4
+                 In any case, Maven will invoke this plugin before the Java source is compiled
+              -->
+            <plugin>
+                <groupId>org.antlr</groupId>
+                <artifactId>antlr4-maven-plugin</artifactId>
+                <version>4.13.1</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>antlr4</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>

parser/src/main/antlr4/nu/zoom/dsl/parser/Endpoints.g4

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+grammar Endpoints;
+
+generatorconfig     : '{' (configitem)? (',' configitem)* '}';
+configitem          : configkey ':' configvalue ;
+configkey           : IDENTIFIER ;
+configvalue         : (IDENTIFIER|VALUE) ;
+fieldName           : IDENTIFIER ;
+fieldType           : IDENTIFIER ;
+compoundTypeName    : IDENTIFIER ;
+compoundField       : fieldName ':' fieldType ;
+compoundFields      : '(' compoundField (',' compoundField)* ')' ;
+compoundType        : compoundTypeName compoundFields ;
+pathSegment         : '/' (IDENTIFIER|VALUE) ;
+path                : (pathSegment)+ ;
+endpoint            : path '<' (compoundFields | IDENTIFIER) ;
+
+
+fragment DIGIT      : [0-9] ;
+fragment LOWERCASE  : [a-z] ;
+fragment UPPERCASE  : [A-Z] ;
+WS                  : [ \t\n\r]+ -> skip;
+IDENTIFIER          : (LOWERCASE | UPPERCASE) (LOWERCASE | UPPERCASE | DIGIT)* ;
+VALUE               : ~[ ,{}:()\n\t\r/<>"']+  ;

parser/src/main/java/nu/zoom/dsl/Main.java

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+package nu.zoom.dsl;
+
+public class Main {
+	public static void main(String[] args) {
+		System.out.println("Hello, World!");
+	}
+}

parser/src/main/java/nu/zoom/dsl/parser/ParserFactory.java

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+package nu.zoom.dsl.parser;
+
+public class ParserFactory {
+}