Merge changes I578a2676,I4b37c2d0,Id1e2d638,I1ebe37da,I6135799c am: b6446bec0a am: fcd81b3e3f

Original change: https://android-review.googlesource.com/c/platform/external/junit/+/1613132

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ide8f718358c2b88fb4af0b2b2792f5a560de4d67

1 files changed, 61 insertions, 0 deletions

diff --git a/src/main/java/org/junit/internal/management/ReflectiveRuntimeMXBean.java b/src/main/java/org/junit/internal/management/ReflectiveRuntimeMXBean.java
new file mode 100644
index 0000000..289587a
--- /dev/null
+++ b/src/main/java/org/junit/internal/management/ReflectiveRuntimeMXBean.java
@@ -0,0 +1,61 @@
+package org.junit.internal.management;
+
+import org.junit.internal.Classes;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Implementation of {@link RuntimeMXBean} using the JVM reflectively.
+ */
+final class ReflectiveRuntimeMXBean implements RuntimeMXBean {
+  private final Object runtimeMxBean;
+
+  private static final class Holder {
+    private static final Method getInputArgumentsMethod;
+    static {
+      Method inputArguments = null;
+      try {
+        Class<?> threadMXBeanClass = Classes.getClass("java.lang.management.RuntimeMXBean");
+        inputArguments = threadMXBeanClass.getMethod("getInputArguments");
+      } catch (ClassNotFoundException e) {
+        // do nothing, input arguments will be null on failure
+      } catch (NoSuchMethodException e) {
+        // do nothing, input arguments will be null on failure
+      } catch (SecurityException e) {
+        // do nothing, input arguments will be null on failure
+      }
+      getInputArgumentsMethod = inputArguments;
+    }
+  }
+
+  ReflectiveRuntimeMXBean(Object runtimeMxBean) {
+    super();
+    this.runtimeMxBean = runtimeMxBean;
+  }
+
+  /**
+   * {@inheritDoc}
+   */
+  @SuppressWarnings("unchecked")
+  public List<String> getInputArguments() {
+    if (Holder.getInputArgumentsMethod != null) {
+      try {
+        return (List<String>) Holder.getInputArgumentsMethod.invoke(runtimeMxBean);
+      } catch (ClassCastException e) { // no multi-catch with source level 6
+        // fallthrough
+      } catch (IllegalAccessException e) {
+        // fallthrough
+      } catch (IllegalArgumentException e) {
+        // fallthrough
+      } catch (InvocationTargetException e) {
+        // fallthrough
+      }
+    }
+    return Collections.emptyList();
+  }
+
+}
+