From f8cdfdea0902ec3e4776db024797cf6af143f498 Mon Sep 17 00:00:00 2001
From: Vaci Koblizek <vaci@vaci.org>
Date: Mon, 9 Nov 2020 17:33:20 +0000
Subject: [PATCH] set AnyPointer from AnyPointer

---
 .../src/test/java/org/capnproto/EncodingTest.java   | 13 +++++++++++++
 runtime/src/main/java/org/capnproto/AnyPointer.java | 12 ++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/compiler/src/test/java/org/capnproto/EncodingTest.java b/compiler/src/test/java/org/capnproto/EncodingTest.java
index fde64a1..c0f2d64 100644
--- a/compiler/src/test/java/org/capnproto/EncodingTest.java
+++ b/compiler/src/test/java/org/capnproto/EncodingTest.java
@@ -844,6 +844,19 @@ public class EncodingTest {
       Assert.assertEquals(listReader.get(0).getInt8Field(), 11);
       TestUtil.checkTestMessage(listReader.get(1));
   }
+
+  @org.junit.Test
+  public void testCopyAnyPointer() {
+      MessageBuilder message1 = new MessageBuilder();
+      Test.TestAllTypes.Builder root1 = message1.initRoot(Test.TestAllTypes.factory);
+      TestUtil.initTestMessage(root1);
+
+      MessageBuilder message2 = new MessageBuilder();
+      AnyPointer.Builder root2 = message2.initRoot(AnyPointer.factory);
+      root2.set(message1.getRoot(AnyPointer.factory).asReader());
+
+      TestUtil.checkTestMessage(root2.getAs(Test.TestAllTypes.factory));
+  }
 }
 
 
diff --git a/runtime/src/main/java/org/capnproto/AnyPointer.java b/runtime/src/main/java/org/capnproto/AnyPointer.java
index 7123080..fe8ee04 100644
--- a/runtime/src/main/java/org/capnproto/AnyPointer.java
+++ b/runtime/src/main/java/org/capnproto/AnyPointer.java
@@ -86,6 +86,18 @@ public final class AnyPointer {
             factory.setPointerBuilder(this.segment, this.pointer, reader);
         }
 
+        public void set(AnyPointer.Reader reader) {
+            if (reader.isNull()) {
+                WireHelpers.zeroObject(this.segment, this.pointer);
+                WireHelpers.zeroPointerAndFars(this.segment, this.pointer);
+            }
+            else {
+                WireHelpers.copyPointer(
+                        this.segment, this.pointer,
+                        reader.segment, reader.pointer, reader.nestingLimit);
+            }
+        }
+
         public final Reader asReader() {
             return new Reader(segment, pointer, java.lang.Integer.MAX_VALUE);
         }