Extract Frontend interface from JavaFrontend

3 files changed, 20 insertions, 6 deletions

diff --git a/src/main/java/org/zwobble/couscous/CouscousCompiler.java b/src/main/java/org/zwobble/couscous/CouscousCompiler.java
index a1e0787..39c1709 100644
--- a/src/main/java/org/zwobble/couscous/CouscousCompiler.java
+++ b/src/main/java/org/zwobble/couscous/CouscousCompiler.java
@@ -5,17 +5,18 @@ import java.nio.file.Path;
 import java.util.List;
 
 import org.zwobble.couscous.ast.ClassNode;
-import org.zwobble.couscous.frontends.java.JavaFrontend;
 
 public class CouscousCompiler {
+    private final Frontend frontend;
     private final Backend backend;
 
-    public CouscousCompiler(Backend backend) {
+    public CouscousCompiler(Frontend frontend, Backend backend) {
+        this.frontend = frontend;
         this.backend = backend;
     }
 
     public void compileDirectory(Path path) throws IOException {
-        List<ClassNode> classes = JavaFrontend.readSourceDirectory(path);
+        List<ClassNode> classes = frontend.readSourceDirectory(path);
         backend.compile(classes);
     }
 
diff --git a/src/main/java/org/zwobble/couscous/Frontend.java b/src/main/java/org/zwobble/couscous/Frontend.java
new file mode 100644
index 0000000..9d823bc
--- /dev/null
+++ b/src/main/java/org/zwobble/couscous/Frontend.java
@@ -0,0 +1,11 @@
+package org.zwobble.couscous;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.util.List;
+
+import org.zwobble.couscous.ast.ClassNode;
+
+public interface Frontend {
+    List<ClassNode> readSourceDirectory(Path path) throws IOException;
+}
diff --git a/src/main/java/org/zwobble/couscous/frontends/java/JavaFrontend.java b/src/main/java/org/zwobble/couscous/frontends/java/JavaFrontend.java
index f58e6af..2a842c9 100644
--- a/src/main/java/org/zwobble/couscous/frontends/java/JavaFrontend.java
+++ b/src/main/java/org/zwobble/couscous/frontends/java/JavaFrontend.java
@@ -6,18 +6,20 @@ import java.nio.file.Path;
 import java.util.List;
 import java.util.stream.Stream;
 
+import org.zwobble.couscous.Frontend;
 import org.zwobble.couscous.ast.ClassNode;
 import org.zwobble.couscous.util.ExtraLists;
 
-public class JavaFrontend {
-    public static List<ClassNode> readSourceDirectory(Path directoryPath) throws IOException {
+public class JavaFrontend implements Frontend {
+    @Override
+    public List<ClassNode> readSourceDirectory(Path directoryPath) throws IOException {
         JavaReader reader = new JavaReader();
         return ExtraLists.map(
             findJavaFiles(directoryPath),
             javaFile -> reader.readClassFromFile(directoryPath, javaFile));
     }
     
-    private static Stream<Path> findJavaFiles(Path directoryPath) throws IOException {
+    private Stream<Path> findJavaFiles(Path directoryPath) throws IOException {
         return Files.walk(directoryPath)
             .filter(path -> path.toFile().isFile() && path.toString().endsWith(".java"));
     }