Create utility dir arrow/jniutil (apache#27)

* Create utility dir arrow/jniutil

* fix

cpp/cmake_modules/DefineOptions.cmake

@@ -260,6 +260,8 @@ if("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_SOURCE_DIR}")
 
  define_option(ARROW_JNI "Build the Arrow JNI lib" OFF)
 
+ define_option(ARROW_JNIUTIL "Build Arrow JNI utilities" ON)
+
  define_option(ARROW_JSON "Build Arrow with JSON support (requires RapidJSON)" OFF)
 
  define_option(ARROW_MIMALLOC "Build the Arrow mimalloc-based allocator" OFF)

cpp/src/arrow/CMakeLists.txt

@@ -488,6 +488,14 @@ if(ARROW_FILESYSTEM)
  list(APPEND ARROW_TESTING_SRCS filesystem/test_util.cc)
 endif()
 
+if(ARROW_JNIUTIL)
+ find_package(JNI REQUIRED)
+ list(APPEND ARROW_SRCS
+ jniutil/jni_util.cc)
+
+ set(ARROW_PRIVATE_INCLUDES ${ARROW_PRIVATE_INCLUDES} ${JNI_INCLUDE_DIRS})
+endif()
+
 if(ARROW_IPC)
  list(APPEND
  ARROW_SRCS
@@ -572,7 +580,9 @@ add_arrow_lib(arrow
  SHARED_INSTALL_INTERFACE_LIBS
  ${ARROW_SHARED_INSTALL_INTERFACE_LIBS}
  STATIC_INSTALL_INTERFACE_LIBS
- ${ARROW_STATIC_INSTALL_INTERFACE_LIBS})
+ ${ARROW_STATIC_INSTALL_INTERFACE_LIBS}
+ PRIVATE_INCLUDES
+ ${JNI_INCLUDE_DIRS})
 
 add_dependencies(arrow ${ARROW_LIBRARIES})
 
@@ -765,6 +775,10 @@ if(ARROW_IPC)
  add_subdirectory(ipc)
 endif()
 
+if(ARROW_JNIUTIL)
+ add_subdirectory(jniutil)
+endif()
+
 if(ARROW_JSON)
  add_subdirectory(json)
 endif()

cpp/src/arrow/jniutil/CMakeLists.txt

@@ -0,0 +1,31 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you 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 limitationsn
+# under the License.
+
+#
+# arrow_dataset_jni
+#
+
+arrow_install_all_headers("arrow/jniutil")
+
+find_package(JNI REQUIRED)
+
+add_arrow_test(arrow_jniutil_test
+ SOURCES
+ jni_util_test.cc
+ jni_util.cc
+ EXTRA_INCLUDES
+ ${JNI_INCLUDE_DIRS})