From 4e9005d7c5a8ee110d8792d7d4dde5d9680a6a64 Mon Sep 17 00:00:00 2001
From: Uwe Schindler <uwe@thetaphi.de>
Date: Thu, 16 Jun 2016 00:25:52 +0200
Subject: [PATCH] Add test for signature polymorphic methods

---
 build.xml                                 |  12 +++++++-
 src/test/antunit/Java7MethodHandles.class | Bin 0 -> 1235 bytes
 src/test/antunit/Java7MethodHandles.java  |  30 +++++++++++++++++++
 src/test/antunit/TestJava7.xml            |  34 ++++++++++++++++++++++
 4 files changed, 75 insertions(+), 1 deletion(-)
 create mode 100644 src/test/antunit/Java7MethodHandles.class
 create mode 100644 src/test/antunit/Java7MethodHandles.java
 create mode 100644 src/test/antunit/TestJava7.xml

diff --git a/build.xml b/build.xml
index 59be6336..3156c7ad 100644
--- a/build.xml
+++ b/build.xml
@@ -633,6 +633,9 @@
     <condition property="-gen.sunmisc">
       <available classname="sun.misc.BASE64Encoder"/>
     </condition>
+    <condition property="-gen.jdk7">
+      <available classname="java.lang.invoke.MethodHandle"/>
+    </condition>
     <condition property="-gen.jdk8">
       <hasmethod classname="java.util.Collections" method="emptySortedSet"/>
     </condition>
@@ -655,6 +658,13 @@
       nowarn="true" source="1.6" target="1.6" debug="true" deprecation="false" encoding="${build.encoding}"/>
   </target>
   
+  <target name="-generate-test-classes-jdk7" if="-gen.jdk7">
+    <echo level="info" message="Generating test classes for Java 7:"/>
+    <delete dir="src/test/antunit" includes="Java7*.class"/>
+    <javac includeantruntime="false" srcdir="src/test/antunit" destdir="src/test/antunit" includes="Java7*.java"
+      nowarn="true" source="1.7" target="1.7" debug="true" deprecation="false" encoding="${build.encoding}"/>
+  </target>
+  
   <target name="-generate-test-classes-jdk8" if="-gen.jdk8">
     <echo level="info" message="Generating test classes for Java 8:"/>
     <delete dir="src/test/antunit" includes="Java8*.class"/>
@@ -662,7 +672,7 @@
       nowarn="true" source="1.8" target="1.8" debug="true" deprecation="false" encoding="${build.encoding}"/>
   </target>
   
-  <target name="generate-test-classes" depends="-generate-test-classes-init,-generate-test-classes-sunmisc,-generate-test-classes-jdk6,-generate-test-classes-jdk8" description="Regenerates .class files used by tests if the current JDK version supports it"/>
+  <target name="generate-test-classes" depends="-generate-test-classes-init,-generate-test-classes-sunmisc,-generate-test-classes-jdk6,-generate-test-classes-jdk7,-generate-test-classes-jdk8" description="Regenerates .class files used by tests if the current JDK version supports it"/>
   
   <target name="show-help-mojo" depends="install-maven-artifacts" description="Shows help about mojo usage">
     <artifact:mvn mavenVersion="${maven.version}" failonerror="true" fork="${maven.fork}" taskname="help">
diff --git a/src/test/antunit/Java7MethodHandles.class b/src/test/antunit/Java7MethodHandles.class
new file mode 100644
index 0000000000000000000000000000000000000000..bb770fdbef87f27bb6258fc274a3fe760a2f99cf
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/src/test/antunit/Java7MethodHandles.java b/src/test/antunit/Java7MethodHandles.java
new file mode 100644
index 00000000..df40bc87
--- /dev/null
+++ b/src/test/antunit/Java7MethodHandles.java
@@ -0,0 +1,30 @@
+/*
+ * (C) Copyright Uwe Schindler (Generics Policeman) and others.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* The binary class file is packaged together with the source distribution.
+ */
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+
+class Java7MethodHandles {
+  static void main(String... args) throws Throwable {
+    MethodHandle mh = MethodHandles.publicLookup().findVirtual(StringBuilder.class, "append",
+      MethodType.methodType(StringBuilder.class, int.class));
+    StringBuilder result = (StringBuilder) mh.invoke(new StringBuilder(), 1);
+  }
+}
diff --git a/src/test/antunit/TestJava7.xml b/src/test/antunit/TestJava7.xml
new file mode 100644
index 00000000..659c0e08
--- /dev/null
+++ b/src/test/antunit/TestJava7.xml
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * (C) Copyright Uwe Schindler (Generics Policeman) and others.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+-->
+<project xmlns:au="antlib:org.apache.ant.antunit">
+
+  <condition property="has.MethodHandle">
+    <available classname="java.lang.invoke.MethodHandle"/>
+  </condition>
+  
+  <target name="testSignaturePolymorphic" if="has.MethodHandle">
+    <au:expectfailure expectedMessage="Check for forbidden API calls failed, see log">
+      <forbiddenapis failOnMissingClasses="false">
+        <file file="Java7MethodHandles.class"/>
+        java.lang.invoke.MethodHandle#invoke(java.lang.Object[]) @ Forbidden signature polymorphic method
+      </forbiddenapis>
+    </au:expectfailure>
+    <au:assertLogContains level="error" text="Forbidden method invocation (signature polymorphic): java.lang.invoke.MethodHandle#invoke(java.lang.Object[]) [Forbidden signature polymorphic method]"/> 
+    <au:assertLogContains level="error" text=" 1 error(s)"/> 
+  </target>
+  
+</project>