Remove Identifiers in favour of instance methods

1 files changed, 70 insertions, 2 deletions

diff --git a/src/main/java/org/zwobble/couscous/ast/identifiers/Identifier.java b/src/main/java/org/zwobble/couscous/ast/identifiers/Identifier.java
index 777a0bb..07d7933 100644
--- a/src/main/java/org/zwobble/couscous/ast/identifiers/Identifier.java
+++ b/src/main/java/org/zwobble/couscous/ast/identifiers/Identifier.java
@@ -1,5 +1,73 @@
 package org.zwobble.couscous.ast.identifiers;
 
-public interface Identifier {
-    Iterable<IdentifierPart> getParts();
+import org.zwobble.couscous.types.ScalarType;
+import org.zwobble.couscous.util.ExtraLists;
+
+import java.util.List;
+
+import static org.zwobble.couscous.util.ExtraLists.list;
+
+public class Identifier {
+    public static final Identifier TOP = new Identifier(list());
+
+    public static Identifier forType(String name) {
+        return TOP.type(name);
+    }
+
+    public static Identifier forType(ScalarType type) {
+        return forType(type.getQualifiedName());
+    }
+
+    private final List<IdentifierPart> parts;
+
+    Identifier(List<IdentifierPart> parts) {
+        this.parts = parts;
+    }
+
+    public Iterable<IdentifierPart> getParts() {
+        return parts;
+    }
+
+    public Identifier type(String name) {
+        return extend(name, IdentifierType.TYPE);
+    }
+
+    public Identifier method(String name) {
+        return extend(name, IdentifierType.METHOD);
+    }
+
+    public Identifier constructor() {
+        return extend("", IdentifierType.CONSTRUCTOR);
+    }
+
+    public Identifier variable(String name) {
+        return extend(name, IdentifierType.VARIABLE);
+    }
+
+    private Identifier extend(String name, IdentifierType type) {
+        return new Identifier(ExtraLists.append(parts, new IdentifierPart(name, type)));
+    }
+
+    @Override
+    public String toString() {
+        return "Identifier(" +
+            "parts=" + parts +
+            ')';
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Identifier that = (Identifier) o;
+
+        return parts.equals(that.parts);
+
+    }
+
+    @Override
+    public int hashCode() {
+        return parts.hashCode();
+    }
 }