From cb97484d4694c94946a109fd6d09252767fa1652 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sat, 10 Oct 2015 14:46:18 +0100
Subject: Support Java constructor calls

---
 .../couscous/frontends/java/JavaReader.java        | 22 ++++++++++++++++++----
 .../tests/frontends/java/JavaReaderTests.java      |  8 ++++++++
 2 files changed, 26 insertions(+), 4 deletions(-)

(limited to 'src')

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 1ab6dfb..3306dbf 100644
--- a/src/main/java/org/zwobble/couscous/frontends/java/JavaReader.java
+++ b/src/main/java/org/zwobble/couscous/frontends/java/JavaReader.java
@@ -5,6 +5,7 @@ import java.util.List;
 
 import org.eclipse.jdt.core.dom.ASTNode;
 import org.eclipse.jdt.core.dom.BooleanLiteral;
+import org.eclipse.jdt.core.dom.ClassInstanceCreation;
 import org.eclipse.jdt.core.dom.CompilationUnit;
 import org.eclipse.jdt.core.dom.ConditionalExpression;
 import org.eclipse.jdt.core.dom.Expression;
@@ -16,6 +17,7 @@ import org.eclipse.jdt.core.dom.StringLiteral;
 import org.eclipse.jdt.core.dom.TypeDeclaration;
 import org.zwobble.couscous.ast.ClassNode;
 import org.zwobble.couscous.ast.ClassNodeBuilder;
+import org.zwobble.couscous.ast.ConstructorCallNode;
 import org.zwobble.couscous.ast.ExpressionNode;
 import org.zwobble.couscous.ast.LiteralNode;
 import org.zwobble.couscous.ast.MethodCallNode;
@@ -85,6 +87,8 @@ public class JavaReader {
                 return readStringLiteral((StringLiteral)expression);
             case ASTNode.METHOD_INVOCATION:
                 return readMethodInvocation((MethodInvocation)expression);
+            case ASTNode.CLASS_INSTANCE_CREATION:
+                return readClassInstanceCreation((ClassInstanceCreation)expression);
             case ASTNode.CONDITIONAL_EXPRESSION:
                 return readConditionalExpression((ConditionalExpression)expression);
             default:
@@ -104,12 +108,9 @@ public class JavaReader {
         return LiteralNode.literal(expression.getLiteralValue());
     }
 
-    @SuppressWarnings("unchecked")
     private static ExpressionNode readMethodInvocation(MethodInvocation expression) {
         val methodName = expression.getName().getIdentifier();
-        val arguments = Lists.transform(
-            (List<Expression>)expression.arguments(),
-            JavaReader::readExpression);
+        val arguments = readArguments(expression.arguments());
         if (expression.getExpression().getNodeType() == ASTNode.SIMPLE_NAME) {
             val receiver = expression.getExpression().resolveTypeBinding();
             return StaticMethodCallNode.staticMethodCall(receiver.getQualifiedName(), methodName, arguments);
@@ -122,6 +123,19 @@ public class JavaReader {
         }
     }
 
+    private static ExpressionNode readClassInstanceCreation(ClassInstanceCreation expression) {
+        return ConstructorCallNode.constructorCall(
+            TypeName.of(expression.resolveTypeBinding().getQualifiedName()),
+            readArguments(expression.arguments()));
+    }
+
+    @SuppressWarnings({ "unchecked", "rawtypes" })
+    private static List<ExpressionNode> readArguments(final List javaArguments) {
+        return Lists.transform(
+            (List<Expression>)javaArguments,
+            JavaReader::readExpression);
+    }
+
     private static ExpressionNode readConditionalExpression(ConditionalExpression expression) {
         return new TernaryConditionalNode(
             readExpression(expression.getExpression()),
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 efcd337..cb2a707 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
@@ -12,6 +12,7 @@ import org.zwobble.couscous.values.BooleanValue;
 
 import static java.util.Arrays.asList;
 import static org.junit.Assert.assertEquals;
+import static org.zwobble.couscous.ast.ConstructorCallNode.constructorCall;
 import static org.zwobble.couscous.ast.LiteralNode.literal;
 import static org.zwobble.couscous.ast.MethodCallNode.methodCall;
 import static org.zwobble.couscous.ast.StaticMethodCallNode.staticMethodCall;
@@ -43,6 +44,13 @@ public class JavaReaderTests {
             readExpression("Integer.parseInt(\"42\")"));
     }
     
+    @Test
+    public void canReadConstructorCalls() {
+        assertEquals(
+            constructorCall(TypeName.of("java.lang.String"), asList(literal("_"), literal(42))),
+            readExpression("new String(\"_\", 42)"));
+    }
+    
     @Test
     public void canReadTernaryConditionals() {
         assertEquals(
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