Adds read-write API generation support for Java code generation

code-gen-projects/input/bad/nested_struct/mismatched_type.ion

@@ -0,0 +1,8 @@
+// nested struct with type mismatched fields
+{
+ A: "hello",
+ B: 12,
+ C: {
+    D: 1e0, // expected type: bool
+ }
+}

code-gen-projects/input/bad/struct_with_fields/mismatched_sequence_element.ion

@@ -0,0 +1,8 @@
+// struct with mismatched sequence element
+{
+ A: "hello",
+ B: 12,
+ C: [1, 2, 3],
+ D: 10e2
+}
+

code-gen-projects/input/bad/struct_with_fields/mismatched_type.ion

@@ -0,0 +1,8 @@
+// simple struct with type mismatched fields
+{
+ A: "hello",
+ B: false, // expected field type: int
+ C: ["foo", "bar", "baz"],
+ D: 10e2
+}
+

code-gen-projects/input/good/nested_struct/empty_values.ion

@@ -0,0 +1,8 @@
+// nested struct with empty string and zeros
+{
+ C: {
+    D: false,
+ },
+ A: "",
+ B: 0,
+}

code-gen-projects/input/nested_struct.ion → code-gen-projects/input/good/nested_struct/valid_fields.ion

@@ -1,7 +1,8 @@
+// nested struct with all valid fields
 {
  A: "hello",
  B: 12,
  C: {
     D: false,
  }
-}
+}

code-gen-projects/input/good/nested_struct/valid_unordered_fields.ion

@@ -0,0 +1,9 @@
+// nested struct with unordered fields
+{
+ A: "hello",
+ B: 12,
+ C: {
+    D: false,
+ }
+}
+

code-gen-projects/input/good/struct_with_fields/empty_values.ion

@@ -0,0 +1,7 @@
+// struct with empty list, empty string and zeros
+{
+ C: [],
+ A: "",
+ B: 0,
+ D: 0e0,
+}

code-gen-projects/input/good/struct_with_fields/valid_fields.ion

@@ -0,0 +1,7 @@
+// simple struct with all valid fields
+{
+ A: "hello",
+ B: 12,
+ C: ["foo", "bar", "baz"],
+ D: 10e2
+}

code-gen-projects/input/struct_with_fields.ion → code-gen-projects/input/good/struct_with_fields/valid_unordered_fields.ion

@@ -1,5 +1,8 @@
+
+// struct with unordered fields
 {
+ C: ["foo", "bar", "baz"],
  A: "hello",
  B: 12,
- C: ["foo", "bar", "baz"],
-}
+ D: 10e2,
+}

code-gen-projects/java/code-gen-demo/build.gradle.kts

@@ -65,4 +65,8 @@ tasks {
 tasks.named<Test>("test") {
     // Use JUnit Platform for unit tests.
     useJUnitPlatform()
+    testLogging {
+        showStandardStreams = true
+        events("skipped", "failed")
+    }
 }

code-gen-projects/java/code-gen-demo/src/test/java/org/example/CodeGenTest.java

@@ -3,24 +3,133 @@
 import org.junit.jupiter.api.Test;
 import static org.junit.jupiter.api.Assertions.*;
 import java.util.ArrayList;
+import com.amazon.ion.system.IonReaderBuilder;
+import com.amazon.ion.IonReader;
+import com.amazon.ion.system.IonTextWriterBuilder;
+import com.amazon.ion.IonWriter;
+import com.amazon.ion.IonSystem;
+import com.amazon.ion.system.IonSystemBuilder;
+import com.amazon.ion.IonLoader;
+import com.amazon.ion.IonException;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.FileInputStream;
+import java.io.File;
 
 class CodeGenTest {
-    // TODO: Add roundtrip tests after read-write APIs are supported for Java code generation
+    private static final IonSystem ionSystem = IonSystemBuilder.standard().build();
+    private static final IonLoader ionLoader = ionSystem.getLoader();
+
     @Test void getterAndSetterTestForStructWithFields() {
          ArrayList<String> a = new ArrayList<String>();
          a.add("foo");
          a.add("bar");
          a.add("baz");
-         StructWithFields s = new StructWithFields("hello", 12, new AnonymousType2(a));
+         StructWithFields s = new StructWithFields("hello", 12, new AnonymousType2(a), 10e2);
+
+         // getter tests for `StructWithFields`
          assertEquals("hello", s.getA(), "s.getA() should return \"hello\"");
          assertEquals(12, s.getB(), "s.getB() should return `12`");
          assertEquals(3, s.getC().getValue().size(), "s.getC().getValue() should return ArrayList fo size 3");
+         assertEquals(10e2, s.getD(), "s.getD() should return `10e2`");
+
+         // setter tests for `StructWithFields`
+         s.setA("hi");
+         assertEquals("hi", s.getA(), "s.getA() should return \"hi\"");
+         s.setB(6);
+         assertEquals(6, s.getB(), "s.getB() should return `6`");
+         s.setC(new AnonymousType2(new ArrayList<String>()));
+         assertEquals(true, s.getC().getValue().isEmpty(), "s.getC().isEmpty() should return `true`");
+         s.setD(11e3);
+         assertEquals(11e3 ,s.getD(), "s.getD() should return `11e3`");
     }
 
     @Test void getterAndSetterTestForNestedStruct() {
-             NestedStruct n = new NestedStruct("hello", 12, new AnonymousType1(false));
-             assertEquals("hello", n.getA(), "n.getA() should return \"hello\"");
-             assertEquals(12, n.getB(), "n.getB() should return `12`");
-             assertEquals(false, n.getC().getD(), "n.getC().getD() should return `false`");
+         // getter tests for `NestedStruct`
+         NestedStruct n = new NestedStruct("hello", 12, new AnonymousType1(false));
+         assertEquals("hello", n.getA(), "n.getA() should return \"hello\"");
+         assertEquals(12, n.getB(), "n.getB() should return `12`");
+         assertEquals(false, n.getC().getD(), "n.getC().getD() should return `false`");
+
+         // setter tests for `NestedStruct`
+         n.setA("hi");
+         assertEquals("hi", n.getA(), "s.getA() should return \"hi\"");
+         n.setB(6);
+         assertEquals(6, n.getB(), "s.getB() should return `6`");
+         n.getC().setD(true);
+         assertEquals(true, n.getC().getD(), "s.getC().getD() should return `true`");
+    }
+
+    @Test void roundtripGoodTestForStructWithFields() throws IOException {
+        File dir = new File("./../../input/good/struct_with_fields");
+        String[] fileNames = dir.list();
+        for (String fileName : fileNames) {
+            File f = new File(dir, fileName);
+            InputStream inputStream = new FileInputStream(f);
+            IonTextWriterBuilder b = IonTextWriterBuilder.standard();
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            IonReaderBuilder readerBuilder = IonReaderBuilder.standard();
+            try (IonReader reader = readerBuilder.build(inputStream)) {
+                reader.next();
+                StructWithFields s = StructWithFields.readFrom(reader);
+                IonWriter writer = b.build(out);
+                s.writeTo(writer);
+                writer.close();
+                assertEquals(ionLoader.load(f), ionLoader.load(out.toByteArray()));
+            }
+        }
+    }
+
+    @Test void roundtripBadTestForStructWithFields() throws IOException {
+        File dir = new File("./../../input/bad/struct_with_fields");
+        String[] fileNames = dir.list();
+        for (String fileName : fileNames) {
+            File f = new File(dir, fileName);
+            InputStream inputStream = new FileInputStream(f);
+            IonTextWriterBuilder b = IonTextWriterBuilder.standard();
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            IonReaderBuilder readerBuilder = IonReaderBuilder.standard();
+            try (IonReader reader = readerBuilder.build(inputStream)) {
+                reader.next();
+                assertThrows(Throwable.class, () -> { StructWithFields s = StructWithFields.readFrom(reader); });
+            }
+        }
+    }
+
+    @Test void roundtripGoodTestForNestedStruct() throws IOException {
+        File dir = new File("./../../input/good/nested_struct");
+        String[] fileNames = dir.list();
+        for (String fileName : fileNames) {
+            File f = new File(dir, fileName);
+            InputStream inputStream = new FileInputStream(f);
+            IonTextWriterBuilder b = IonTextWriterBuilder.standard();
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            IonReaderBuilder readerBuilder = IonReaderBuilder.standard();
+            try (IonReader reader = readerBuilder.build(inputStream)) {
+                reader.next();
+                NestedStruct n = NestedStruct.readFrom(reader);
+                IonWriter writer = b.build(out);
+                n.writeTo(writer);
+                writer.close();
+                assertEquals(ionLoader.load(f), ionLoader.load(out.toByteArray()));
+            }
         }
+    }
+
+    @Test void roundtripBadTestForNestedStruct() throws IOException {
+        File dir = new File("./../../input/bad/nested_struct");
+        String[] fileNames = dir.list();
+        for (String fileName : fileNames) {
+            File f = new File(dir, fileName);
+            InputStream inputStream = new FileInputStream(f);
+            IonTextWriterBuilder b = IonTextWriterBuilder.standard();
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            IonReaderBuilder readerBuilder = IonReaderBuilder.standard();
+            try (IonReader reader = readerBuilder.build(inputStream)) {
+                reader.next();
+                assertThrows(Throwable.class, () -> { NestedStruct n = NestedStruct.readFrom(reader); });
+            }
+        }
+    }
 }