From 06580f553ec7a715d2a924c9edecdebda52f940a Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sat, 24 Oct 2015 14:23:15 +0100
Subject: Java: read annotations on methods

---
 src/main/java/org/zwobble/couscous/ast/AnnotationNode.java   |  8 ++++++++
 src/main/java/org/zwobble/couscous/ast/ClassNodeBuilder.java |  8 ++++++++
 src/main/java/org/zwobble/couscous/ast/MethodNode.java       |  1 +
 .../java/org/zwobble/couscous/frontends/java/JavaReader.java |  4 ++++
 .../couscous/tests/frontends/java/JavaReaderTests.java       | 12 ++++++++++++
 5 files changed, 33 insertions(+)
 create mode 100644 src/main/java/org/zwobble/couscous/ast/AnnotationNode.java

diff --git a/src/main/java/org/zwobble/couscous/ast/AnnotationNode.java b/src/main/java/org/zwobble/couscous/ast/AnnotationNode.java
new file mode 100644
index 0000000..1f34126
--- /dev/null
+++ b/src/main/java/org/zwobble/couscous/ast/AnnotationNode.java
@@ -0,0 +1,8 @@
+package org.zwobble.couscous.ast;
+
+import lombok.Value;
+
+@Value(staticConstructor="annotation")
+public class AnnotationNode {
+    TypeName type;
+}
diff --git a/src/main/java/org/zwobble/couscous/ast/ClassNodeBuilder.java b/src/main/java/org/zwobble/couscous/ast/ClassNodeBuilder.java
index 7466f07..1b8aea3 100644
--- a/src/main/java/org/zwobble/couscous/ast/ClassNodeBuilder.java
+++ b/src/main/java/org/zwobble/couscous/ast/ClassNodeBuilder.java
@@ -60,6 +60,7 @@ public class ClassNodeBuilder {
         return new MethodBuilder<MethodNode>(builder -> MethodNode.builder()
             .isStatic(isStatic)
             .name(name)
+            .annotations(builder.annotations.build())
             .arguments(builder.arguments.build())
             .body(builder.statements.build())
             .build());
@@ -75,15 +76,22 @@ public class ClassNodeBuilder {
     
     public class MethodBuilder<T> {
         private final Function<MethodBuilder<?>, T> build;
+        private final ImmutableList.Builder<AnnotationNode> annotations;
         private final ImmutableList.Builder<FormalArgumentNode> arguments;
         private final ImmutableList.Builder<StatementNode> statements;
 
         public MethodBuilder(Function<MethodBuilder<?>, T> build) {
             this.build = build;
+            this.annotations = ImmutableList.builder();
             this.arguments = ImmutableList.builder();
             this.statements = ImmutableList.builder();
         }
         
+        public MethodBuilder<T> annotation(TypeName type) {
+            annotations.add(AnnotationNode.annotation(type));
+            return this;
+        }
+        
         public ThisReferenceNode thisReference() {
             return ThisReferenceNode.thisReference(name);
         }
diff --git a/src/main/java/org/zwobble/couscous/ast/MethodNode.java b/src/main/java/org/zwobble/couscous/ast/MethodNode.java
index 0bdad59..644b57b 100644
--- a/src/main/java/org/zwobble/couscous/ast/MethodNode.java
+++ b/src/main/java/org/zwobble/couscous/ast/MethodNode.java
@@ -15,6 +15,7 @@ public class MethodNode implements CallableNode {
         return builder().isStatic(true).name(name);
     }
     
+    List<AnnotationNode> annotations;
     boolean isStatic;
     String name;
     @Singular
diff --git a/src/main/java/org/zwobble/couscous/frontends/java/JavaReader.java b/src/main/java/org/zwobble/couscous/frontends/java/JavaReader.java
index 62aa75a..9b680be 100644
--- a/src/main/java/org/zwobble/couscous/frontends/java/JavaReader.java
+++ b/src/main/java/org/zwobble/couscous/frontends/java/JavaReader.java
@@ -13,6 +13,7 @@ import org.eclipse.jdt.core.dom.Expression;
 import org.eclipse.jdt.core.dom.ExpressionStatement;
 import org.eclipse.jdt.core.dom.FieldAccess;
 import org.eclipse.jdt.core.dom.FieldDeclaration;
+import org.eclipse.jdt.core.dom.IAnnotationBinding;
 import org.eclipse.jdt.core.dom.IBinding;
 import org.eclipse.jdt.core.dom.ITypeBinding;
 import org.eclipse.jdt.core.dom.IVariableBinding;
@@ -114,6 +115,9 @@ public class JavaReader {
     private static <T> MethodBuilder<T> buildMethod(
             MethodDeclaration method,
             MethodBuilder<T> builder) {
+        for (IAnnotationBinding annotation : method.resolveBinding().getAnnotations()) {
+            builder.annotation(typeOf(annotation.getAnnotationType()));
+        }
         for (Object parameterObject : method.parameters()) {
             val parameter = (SingleVariableDeclaration)parameterObject;
             builder.argument(
diff --git a/src/test/java/org/zwobble/couscous/tests/frontends/java/JavaReaderTests.java b/src/test/java/org/zwobble/couscous/tests/frontends/java/JavaReaderTests.java
index a9465cd..74dec1a 100644
--- a/src/test/java/org/zwobble/couscous/tests/frontends/java/JavaReaderTests.java
+++ b/src/test/java/org/zwobble/couscous/tests/frontends/java/JavaReaderTests.java
@@ -20,6 +20,7 @@ import org.zwobble.couscous.values.StringValue;
 
 import static java.util.Arrays.asList;
 import static org.junit.Assert.assertEquals;
+import static org.zwobble.couscous.ast.AnnotationNode.annotation;
 import static org.zwobble.couscous.ast.AssignmentNode.assign;
 import static org.zwobble.couscous.ast.AssignmentNode.assignStatement;
 import static org.zwobble.couscous.ast.ConstructorCallNode.constructorCall;
@@ -230,6 +231,17 @@ public class JavaReaderTests {
                 literal("Flaws"))),
             constructor.getBody());
     }
+    
+    @Test
+    public void canDeclareStaticMethodWithAnnotation() {
+        val classNode = readClass(
+            "@Deprecated public void doNothing() {}");
+        
+        val method = classNode.getMethods().get(0);
+        assertEquals(
+            asList(annotation(TypeName.of("java.lang.Deprecated"))),
+            method.getAnnotations());
+    }
 
     private ExpressionNode readExpressionInInstanceMethod(String expressionSource) {
         val javaClass =
-- 
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