#431: Add support for char annotation methods

Fixes #431

classlib/src/main/java/org/teavm/classlib/java/lang/reflect/AnnotationDependencyListener.java

@@ -257,6 +257,8 @@ public class AnnotationDependencyListener extends AbstractDependencyListener {
         switch (value.getType()) {
             case AnnotationValue.BOOLEAN:
                 return pe.constant(value.getBoolean() ? 1 : 0);
+            case AnnotationValue.CHAR:
+                return pe.constant(value.getChar());
             case AnnotationValue.BYTE:
                 return pe.constant(value.getByte());
             case AnnotationValue.SHORT:

core/src/main/java/org/teavm/cache/AnnotationIO.java

@@ -93,6 +93,9 @@ public class AnnotationIO {
             case AnnotationValue.BOOLEAN:
                 output.writeUnsigned(value.getBoolean() ? 1 : 0);
                 break;
+            case AnnotationValue.CHAR:
+                output.writeSigned(value.getChar());
+                break;
             case AnnotationValue.BYTE:
                 output.writeSigned(value.getByte());
                 break;
@@ -139,6 +142,8 @@ public class AnnotationIO {
                 return new AnnotationValue(readAnnotation(input));
             case AnnotationValue.BOOLEAN:
                 return new AnnotationValue(input.readUnsigned() != 0);
+            case AnnotationValue.CHAR:
+                return new AnnotationValue((char) input.readUnsigned());
             case AnnotationValue.BYTE:
                 return new AnnotationValue((byte) input.readSigned());
             case AnnotationValue.CLASS:

core/src/main/java/org/teavm/model/AnnotationValue.java

@@ -31,6 +31,7 @@ public class AnnotationValue {
     public static final byte LIST = 9;
     public static final byte ENUM = 10;
     public static final byte ANNOTATION = 11;
+    public static final byte CHAR = 12;
     private byte type;
     private Object value;
 
@@ -44,6 +45,11 @@ public class AnnotationValue {
         this.value = value;
     }
 
+    public AnnotationValue(char value) {
+        this.type = CHAR;
+        this.value = value;
+    }
+
     public AnnotationValue(short value) {
         this.type = SHORT;
         this.value = value;
@@ -101,6 +107,13 @@ public class AnnotationValue {
         return (Boolean) value;
     }
 
+    public char getChar() {
+        if (type != CHAR) {
+            throw new IllegalStateException("There is no char value");
+        }
+        return (Character) value;
+    }
+
     public byte getByte() {
         if (type != BYTE) {
             throw new IllegalStateException("There is no byte value");

core/src/main/java/org/teavm/parsing/Parser.java

@@ -538,6 +538,8 @@ public class Parser {
             return new AnnotationValue((String) value);
         } else if (value instanceof Boolean) {
             return new AnnotationValue((Boolean) value);
+        } else if (value instanceof Character) {
+            return new AnnotationValue((Character) value);
         } else if (value instanceof Byte) {
             return new AnnotationValue((Byte) value);
         } else if (value instanceof Short) {

metaprogramming/impl/src/main/java/org/teavm/metaprogramming/impl/reflect/AnnotationProxy.java

@@ -87,7 +87,7 @@ class AnnotationProxy implements InvocationHandler {
                 case DOUBLE:
                     return value.getDouble();
                 case CHARACTER:
-                    break;
+                    return value.getChar();
             }
         } else if (type.isObject(String.class)) {
             return value.getString();

tests/src/test/java/org/teavm/metaprogramming/test/MetaprogrammingTest.java

@@ -224,9 +224,9 @@ public class MetaprogrammingTest {
     @Test
     public void annotationsWork() {
         assertEquals(""
-                + "foo:23:Object\n"
-                + "foo=!:42:String:int\n"
-                + "f=!:23\n",
+                + "foo:23:Object:?\n"
+                + "foo=!:42:String:int:?\n"
+                + "f=!:23:^\n",
                 readAnnotations(WithAnnotations.class, new WithAnnotations()));
     }
 
@@ -264,6 +264,7 @@ public class MetaprogrammingTest {
         for (Class<?> cls : annot.c()) {
             sb.append(':').append(cls.getSimpleName());
         }
+        sb.append(':').append(annot.d());
         return sb.toString();
     }
 
@@ -534,7 +535,7 @@ public class MetaprogrammingTest {
     @TestAnnotation(a = "foo", c = Object.class)
     @MetaprogrammingClass
     static class WithAnnotations {
-        @TestAnnotation(c = {})
+        @TestAnnotation(c = {}, d = '^')
         int f;
 
         @TestAnnotation(b = 42, c = { String.class, int.class })

tests/src/test/java/org/teavm/metaprogramming/test/TestAnnotation.java

@@ -25,4 +25,6 @@ public @interface TestAnnotation {
     int b() default 23;
 
     Class<?>[] c();
+
+    char d() default '?';
 }