start with a copy of capnpc-c++

Makefile

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+CXX=g++ -std=c++11
+
+CAPNPC_JAVA_SOURCES=src/compiler/capnpc-java.c++
+
+.PHONY: all clean
+
+all : capnpc-java
+
+
+clean :
+	rm -rf capnpc-java capnp
+
+capnpc-java : $(CAPNPC_JAVA_SOURCES)
+	$(CXX) -I/usr/local/include -L/usr/local/lib -lkj -lcapnp $(CAPNPC_JAVA_SOURCES) -o capnpc-java

examples/addressbook.capnp

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+# Copyright (c) 2013, Kenton Varda <temporal@gmail.com>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this
+#    list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+#    this list of conditions and the following disclaimer in the documentation
+#    and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+@0x9eb32e19f86ee174;
+
+using Cxx = import "/capnp/c++.capnp";
+$Cxx.namespace("addressbook");
+
+struct Person {
+  id @0 :UInt32;
+  name @1 :Text;
+  email @2 :Text;
+  phones @3 :List(PhoneNumber);
+
+  struct PhoneNumber {
+    number @0 :Text;
+    type @1 :Type;
+
+    enum Type {
+      mobile @0;
+      home @1;
+      work @2;
+    }
+  }
+
+  employment :union {
+    unemployed @4 :Void;
+    employer @5 :Text;
+    school @6 :Text;
+    selfEmployed @7 :Void;
+    # We assume that a person is only one of these.
+  }
+}
+
+struct AddressBook {
+  people @0 :List(Person);
+}
+

src/capnp/layout.java

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+package capnp;
+
+class PointerReader {
+
+}