1 files changed, 46 insertions, 0 deletions
diff --git a/src/main/java/org/glavo/javah/ClassMetaInfo.java b/src/main/java/org/glavo/javah/ClassMetaInfo.java
new file mode 100644
index 0000000..bc3ffcc
--- /dev/null
+++ b/src/main/java/org/glavo/javah/ClassMetaInfo.java
@@ -0,0 +1,46 @@
+package org.glavo.javah;
+
+import org.objectweb.asm.*;
+
+import java.util.*;
+
+class ClassMetaInfo extends ClassVisitor {
+    final List<Constant> constants = new LinkedList<>();
+    final List<NativeMethod> methods = new LinkedList<>();
+    final Map<String, Integer> counts = new HashMap<>();
+
+    ClassName superClassName;
+    ClassName name;
+
+    public ClassMetaInfo() {
+        super(Opcodes.ASM7);
+    }
+
+    @Override
+    public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
+        this.superClassName = superName == null ? null : ClassName.of(superName.replace('/', '.'));
+        this.name = ClassName.of(name.replace('/', '.'));
+    }
+
+    @Override
+    public MethodVisitor visitMethod(int access, String name, String descriptor, String signature, String[] exceptions) {
+        counts.put(name, counts.getOrDefault(name, 0) + 1);
+        if ((access & Opcodes.ACC_NATIVE) != 0) {
+            this.methods.add(NativeMethod.of(access, name, descriptor));
+        }
+        return null;
+    }
+
+    @Override
+    public FieldVisitor visitField(int access, String name, String descriptor, String signature, Object value) {
+        if (value != null && !(value instanceof String)) {
+            constants.add(Constant.of(name, value));
+        }
+        return null;
+    }
+
+    boolean isOverloadMethod(NativeMethod method) {
+        Objects.requireNonNull(method);
+        return counts.getOrDefault(method.name(), 1) > 1;
+    }
+}