fix: detect loaded class duplication (#1107)

jadx-core/src/main/java/jadx/core/dex/nodes/RootNode.java

@@ -5,6 +5,7 @@ import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.stream.Collectors;
 
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -20,6 +21,7 @@ import jadx.api.plugins.input.data.IClassData;
 import jadx.api.plugins.input.data.ILoadResult;
 import jadx.core.Jadx;
 import jadx.core.clsp.ClspGraph;
+import jadx.core.dex.attributes.AType;
 import jadx.core.dex.info.ClassInfo;
 import jadx.core.dex.info.ConstStorage;
 import jadx.core.dex.info.FieldInfo;
@@ -60,8 +62,8 @@ public class RootNode {
 
 	private final ICodeCache codeCache;
 
-	private final List<ClassNode> classes = new ArrayList<>();
 	private final Map<ClassInfo, ClassNode> clsMap = new HashMap<>();
+	private List<ClassNode> classes = new ArrayList<>();
 
 	private ClspGraph clsp;
 	@Nullable
@@ -91,6 +93,18 @@ public class RootNode {
 				}
 			});
 		}
+		if (classes.size() != clsMap.size()) {
+			// class name duplication detected
+			classes.stream().collect(Collectors.groupingBy(ClassNode::getClassInfo))
+					.entrySet().stream()
+					.filter(entry -> entry.getValue().size() > 1)
+					.forEach(entry -> {
+						LOG.warn("Found duplicated class: {}, count: {}. Only one will be loaded!", entry.getKey(),
+								entry.getValue().size());
+						entry.getValue().forEach(cls -> cls.addAttr(AType.COMMENTS, "WARNING: Classes with same name are omitted"));
+					});
+		}
+		classes = new ArrayList<>(clsMap.values());
 		// sort classes by name, expect top classes before inner
 		classes.sort(Comparator.comparing(ClassNode::getFullName));
 		initInnerClasses();

jadx-plugins/jadx-java-convert/src/main/java/jadx/plugins/input/javaconvert/JavaConvertLoader.java

@@ -82,9 +82,11 @@ public class JavaConvertLoader {
 				.filter(aarMatcher::matches)
 				.forEach(path -> ZipSecurity.readZipEntries(path.toFile(), (entry, in) -> {
 					try {
-						if (entry.getName().endsWith(".jar")) {
+						String entryName = entry.getName();
+						if (entryName.endsWith(".jar")) {
 							Path tempJar = saveInputStreamToFile(in, ".jar");
 							result.addTempPath(tempJar);
+							LOG.debug("Loading jar: {} ...", entryName);
 							convertJar(result, tempJar);
 						}
 					} catch (Exception e) {