Issue #3732: fix NPE for Java 8's 'receiver parameter'

1 files changed, 32 insertions, 0 deletions

diff --git a/src/test/resources/com/puppycrawl/tools/checkstyle/checks/javadoc/InputJavadocReceiverParameter.java b/src/test/resources/com/puppycrawl/tools/checkstyle/checks/javadoc/InputJavadocReceiverParameter.java
new file mode 100644
index 000000000..0e4a14c8b
--- /dev/null
+++ b/src/test/resources/com/puppycrawl/tools/checkstyle/checks/javadoc/InputJavadocReceiverParameter.java
@@ -0,0 +1,32 @@
+package com.puppycrawl.tools.checkstyle.checks.javadoc;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import java.nio.ByteBuffer;
+
+public class InputJavadocReceiverParameter {
+
+    @Retention(RetentionPolicy.RUNTIME)
+    @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+    public @interface UnknownInitialization {
+        /**
+         * A dummy annotation to check Java 8's receiver parameter handling.
+         *
+         * @return a class
+         */
+        Class<?> value() default Object.class;
+    }
+
+    /**
+     * Function to check handling of Java 8's receiver parameter.
+     *
+     * @param buffer dummy argument
+     */
+    public void foo(@UnknownInitialization(InputJavadocReceiverParameter.class) InputJavadocReceiverParameter this,
+            final ByteBuffer buffer) {
+        buffer.putInt(1);
+    }
+
+}