build: Add support for building jcommander within the AOSP (host only).

Bug: 27552463
Change-Id: I71b4f3b26b9307b36444cecc75d67de03be9cb23

2 files changed, 49 insertions, 3 deletions

diff --git a/Android.mk b/Android.mk
new file mode 100644
index 0000000..76f2f8b
--- /dev/null
+++ b/Android.mk
@@ -0,0 +1,42 @@
+# Copyright (C) 2016 The Android Open Source Project
+#
+# 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.
+#
+
+#
+# Build support for jcommander within the Android Open Source Project
+# See https://source.android.com/source/building.html for more information
+#
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+# Host JAR builds have every single file because all the standard APIs are available.
+jcommander_all_src_files := $(call all-java-files-under, src/main)
+# Filter out PathConverter since android is missing java.nio.file APIs.
+jcommander_android_src_files := $(filter-out %/PathConverter.java,$(jcommander_all_src_files))
+
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := $(jcommander_all_src_files)
+LOCAL_MODULE := jcommander-host
+LOCAL_MODULE_TAGS := optional
+include $(BUILD_HOST_JAVA_LIBRARY)
+
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := $(jcommander_android_src_files)
+LOCAL_MODULE := jcommander-hostdex
+LOCAL_MODULE_TAGS := optional
+include $(BUILD_HOST_DALVIK_JAVA_LIBRARY)
+
+# TODO: also add the tests once we have testng working.
diff --git a/src/main/java/com/beust/jcommander/internal/DefaultConverterFactory.java b/src/main/java/com/beust/jcommander/internal/DefaultConverterFactory.java
index 2b8a10c..7eb5ae5 100644
--- a/src/main/java/com/beust/jcommander/internal/DefaultConverterFactory.java
+++ b/src/main/java/com/beust/jcommander/internal/DefaultConverterFactory.java
@@ -29,7 +29,6 @@ import com.beust.jcommander.converters.ISO8601DateConverter;
 import com.beust.jcommander.converters.IntegerConverter;
 import com.beust.jcommander.converters.LongConverter;
 import com.beust.jcommander.converters.StringConverter;
-import com.beust.jcommander.converters.PathConverter;
 import com.beust.jcommander.converters.URIConverter;
 import com.beust.jcommander.converters.URLConverter;
 
@@ -38,7 +37,6 @@ import java.math.BigDecimal;
 import java.util.Date;
 import java.net.URI;
 import java.net.URL;
-import java.nio.file.Path;
 import java.util.Map;
 
 public class DefaultConverterFactory implements IStringConverterFactory {
@@ -63,7 +61,13 @@ public class DefaultConverterFactory implements IStringConverterFactory {
     m_classConverters.put(File.class, FileConverter.class);
     m_classConverters.put(BigDecimal.class, BigDecimalConverter.class);
     m_classConverters.put(Date.class, ISO8601DateConverter.class);
-    m_classConverters.put(Path.class, PathConverter.class);
+    try {
+      Class<?> pathClass = Class.forName("java.nio.file.Path");
+      Class<?> pathConverterClass = Class.forName("com.beust.jcommander.converters.PathConverter");
+      m_classConverters.put(pathClass, (Class<? extends IStringConverter<?>>)pathConverterClass);
+    } catch (ClassNotFoundException e) {
+      // Do nothing: Android does not have java.nio.file.Path
+    }
     m_classConverters.put(URI.class, URIConverter.class);
     m_classConverters.put(URL.class, URLConverter.class);
   }