feat: a toString() method for enumerated values in Java

lib/codegen/fromcto/java/javavisitor.js

@@ -141,9 +141,20 @@ class JavaVisitor {
         this.plugin.addEnumAnnotations(enumDeclaration, parameters);
         parameters.fileWriter.writeLine(0, 'public enum ' + enumDeclaration.getName() + ' {' );
 
-        enumDeclaration.getOwnProperties().forEach((property) => {
-            property.accept(this, parameters);
-        });
+        const properties = enumDeclaration.getOwnProperties();
+        if (properties.length === 0) {
+            parameters.fileWriter.writeLine(1, ';');
+        } else {
+            properties.forEach((property, index) => {
+                const suffix = index < properties.length - 1 ? ',' : ';';
+                parameters.fileWriter.writeLine(1, property.getName() + suffix);
+            });
+        }
+
+        parameters.fileWriter.writeLine(1, '@Override');
+        parameters.fileWriter.writeLine(1, 'public String toString() {');
+        parameters.fileWriter.writeLine(2, 'return name();');
+        parameters.fileWriter.writeLine(1, '}');
 
         parameters.fileWriter.writeLine(0, '}' );
 

test/codegen/__snapshots__/codegen.js.snap

@@ -1568,7 +1568,11 @@ public enum State {
    CO,
    WA,
    IL,
-   CA,
+   CA;
+   @Override
+   public String toString() {
+      return name();
+   }
 }
 ",
 }
@@ -1585,7 +1589,11 @@ import com.fasterxml.jackson.annotation.*;
 public enum TShirtSizeType {
    SMALL,
    MEDIUM,
-   LARGE,
+   LARGE;
+   @Override
+   public String toString() {
+      return name();
+   }
 }
 ",
 }
@@ -1655,6 +1663,11 @@ package org.acme.hr.base;
 import com.fasterxml.jackson.annotation.*;
 @JsonIgnoreProperties({"$class"})
 public enum Level {
+   ;
+   @Override
+   public String toString() {
+      return name();
+   }
 }
 ",
 }
@@ -1833,7 +1846,11 @@ public enum Department {
    Finance,
    HR,
    Engineering,
-   Design,
+   Design;
+   @Override
+   public String toString() {
+      return name();
+   }
 }
 ",
 }
@@ -1892,7 +1909,11 @@ import com.fasterxml.jackson.annotation.*;
 @JsonIgnoreProperties({"$class"})
 public enum LaptopMake {
    Apple,
-   Microsoft,
+   Microsoft;
+   @Override
+   public String toString() {
+      return name();
+   }
 }
 ",
 }

test/codegen/fromcto/java/javavisitor.js

@@ -221,33 +221,36 @@ describe('JavaVisitor', function () {
 
     describe('visitEnumDeclaration', () => {
         it('should write an enum declaration and call accept on each property', () => {
-            let acceptSpy = sinon.spy();
-
             let param = {
                 fileWriter: mockFileWriter
             };
 
             let mockEnumDeclaration = sinon.createStubInstance(EnumDeclaration);
             mockEnumDeclaration.isEnum.returns(true);
             mockEnumDeclaration.getName.returns('Bob');
-            mockEnumDeclaration.getOwnProperties.returns([{
-                accept: acceptSpy
-            },
-            {
-                accept: acceptSpy
-            }]);
+            mockEnumDeclaration.getOwnProperties.returns([
+                { getName: () => 'VALUE_A' },
+                { getName: () => 'VALUE_B' },
+            ]);
 
             let mockStartClassFile = sinon.stub(javaVisit, 'startClassFile');
             let mockEndClassFile = sinon.stub(javaVisit, 'endClassFile');
 
             javaVisit.visitEnumDeclaration(mockEnumDeclaration, param);
 
             mockStartClassFile.withArgs(mockEnumDeclaration, param).calledOnce.should.be.ok;
-            param.fileWriter.writeLine.callCount.should.deep.equal(4);
+            param.fileWriter.writeLine.callCount.should.deep.equal(10);
+
             param.fileWriter.writeLine.getCall(0).args.should.deep.equal([0, 'import com.fasterxml.jackson.annotation.*;']);
             param.fileWriter.writeLine.getCall(1).args.should.deep.equal([0, '@JsonIgnoreProperties({"$class"})']);
             param.fileWriter.writeLine.getCall(2).args.should.deep.equal([0, 'public enum Bob {']);
-            param.fileWriter.writeLine.getCall(3).args.should.deep.equal([0, '}']);
+            param.fileWriter.writeLine.getCall(3).args.should.deep.equal([1, 'VALUE_A,']);
+            param.fileWriter.writeLine.getCall(4).args.should.deep.equal([1, 'VALUE_B;']);
+            param.fileWriter.writeLine.getCall(5).args.should.deep.equal([1, '@Override']);
+            param.fileWriter.writeLine.getCall(6).args.should.deep.equal([1, 'public String toString() {']);
+            param.fileWriter.writeLine.getCall(7).args.should.deep.equal([2, 'return name();']);
+            param.fileWriter.writeLine.getCall(8).args.should.deep.equal([1, '}']);
+            param.fileWriter.writeLine.getCall(9).args.should.deep.equal([0, '}']);
             mockEndClassFile.withArgs(mockEnumDeclaration, param).calledOnce.should.be.ok;
         });
     });