Open-source full support for J2ObjC in Bazel, including dead code rem…

…oval, and add an example.

--
MOS_MIGRATED_REVID=100493818

examples/j2objc/BUILD

@@ -0,0 +1,51 @@
+# Copyright 2015 Google Inc. All rights reserved.
+#
+# 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.
+
+java_library(
+    name = "J2ObjcExample-Java",
+    srcs = glob(["src/main/java/**/*.java"]),
+    deps = [
+        "//third_party/java/j2objc:annotations",
+    ],
+)
+
+j2objc_library(
+    name = "J2ObjcExample-J2Objc",
+    entry_classes = ["com.example.myproject.SimpleGreeter"],
+    deps = [":J2ObjcExample-Java"],
+)
+
+objc_binary(
+    name = "J2ObjcExample",
+    srcs = glob([
+        "J2ObjcExample/*.m",
+    ]),
+    hdrs = glob([
+        "J2ObjcExample/*.h",
+    ]),
+    infoplist = "J2ObjcExample/J2ObjcExample-Info.plist",
+    deps = [
+        ":J2ObjcExample-J2Objc",
+    ],
+)
+
+filegroup(
+    name = "srcs",
+    srcs = glob([
+        "J2ObjcExample/*",
+        "src/**",
+        "BUILD",
+    ]),
+    visibility = ["//examples:__pkg__"],
+)

examples/j2objc/J2ObjcExample/AppDelegate.h

@@ -0,0 +1,21 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// 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.
+
+#import <UIKit/UIKit.h>
+
+@interface AppDelegate : UIResponder <UIApplicationDelegate>
+
+@property(strong, nonatomic) UIWindow *window;
+
+@end

examples/j2objc/J2ObjcExample/AppDelegate.m

@@ -0,0 +1,35 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// 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.
+
+#import "AppDelegate.h"
+
+#import "GreeterViewController.h"
+
+@implementation AppDelegate
+
+- (BOOL)application:(UIApplication *)application
+    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
+
+  self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
+
+  UIViewController *viewController = [[GreeterViewController alloc] init];
+
+  self.window.rootViewController = viewController;
+
+  [self.window makeKeyAndVisible];
+
+  return YES;
+}
+
+@end

examples/j2objc/J2ObjcExample/GreeterViewController.h

@@ -0,0 +1,21 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// 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.
+
+#import <UIKit/UIKit.h>
+
+@interface GreeterViewController : UIViewController
+
+- (void)greet;
+
+@end

examples/j2objc/J2ObjcExample/GreeterViewController.m

@@ -0,0 +1,45 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// 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.
+
+#import "GreeterViewController.h"
+
+#import "examples/j2objc/src/main/java/com/example/myproject/SimpleGreeter.h"
+
+@interface GreeterViewController ()
+
+@property(strong, nonatomic) MyProjectSimpleGreeter *myGreeter;
+
+@property(weak, nonatomic) UILabel *greeterLabel;
+
+@end
+
+@implementation GreeterViewController
+
+- (void)viewDidLoad {
+  [super viewDidLoad];
+
+  UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 200, 40)];
+  [self.view addSubview:label];
+  _greeterLabel = label;
+
+  _myGreeter = [[MyProjectSimpleGreeter alloc] initWithId:@"world"];
+  [self greet];
+}
+
+- (void)greet {
+  self.greeterLabel.textColor = [UIColor whiteColor];
+  self.greeterLabel.text = [_myGreeter hello];
+}
+
+@end

examples/j2objc/J2ObjcExample/J2ObjcExample-Info.plist

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Copyright 2015 Google Inc. All rights reserved.
+
+ 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.
+-->
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleDisplayName</key>
+	<string>J2ObjcExample</string>
+	<key>CFBundleExecutable</key>
+	<string>J2ObjcExample</string>
+	<key>CFBundleIdentifier</key>
+	<string>Google.J2ObjcExample</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>J2ObjcExample</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>1.0</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>armv7</string>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
+</plist>

examples/j2objc/J2ObjcExample/main.m

@@ -0,0 +1,22 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// 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.
+
+#import <UIKit/UIKit.h>
+
+int main(int argc, char * argv[]) {
+  @autoreleasepool {
+    NSString *delegateClassName = @"AppDelegate";
+    return UIApplicationMain(argc, argv, nil, delegateClassName);
+  }
+}

examples/j2objc/README.md

@@ -0,0 +1,17 @@
+J2ObjC Examples
+======
+
+J2ObjC is an open-source tool that can transpile Java code to Objective-C code,
+which can then be used by dependent Objective-C code. The J2ObjC repository can be found at
+<https://github.com/google/j2objc>.
+
+The example in this directory shows a simple use of J2Objc with a Java library and an iOS app.
+Because it builds an iOS application it can only be run on Mac OSX.
+Here, a java_library is transpiled to Objective-C via j2objc_library.
+We can then have an objc_library call upon this library.
+
+Build the top-level application with
+`bazel build examples/j2objc:J2ObjcExample`, which when finished emits the
+path to a generated .ipa which you can then install to your test device. The
+same build will also emits the path to an Xcode project directory which you can
+open to continue working with the application in Xcode.

examples/j2objc/src/main/java/com/example/myproject/SimpleGreeter.java

@@ -0,0 +1,51 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// 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.
+
+package com.example.myproject;
+
+import com.google.j2objc.annotations.ObjectiveCName;
+
+/**
+ * A simple Java class that uses a few features of J2ObjC.
+ */
+public class SimpleGreeter {
+  private final Object obj;
+
+  public SimpleGreeter(Object obj) {
+    this.obj = obj;
+  }
+
+  /**
+   * A simple method that says Hello to the object you pass in.
+   */
+  public String hello() {
+    return "Hello, " + obj + "!";
+  }
+
+  /**
+   * A method renamed with ObjectiveCName.
+   */
+  @ObjectiveCName("greetings")
+  public String hello2() {
+    return "Greetings, " + obj + "!";
+  }
+
+  /**
+   * Returns a String description of this SimpleGreeter. Note that this method is renamed
+   * by the J2ObjC transpilation.
+   */
+  public String toString() {
+    return "This is a SimpleGreeter for " + obj;
+  }
+}

examples/j2objc/src/main/java/com/example/myproject/package-info.java

@@ -0,0 +1,21 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// 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.
+
+/**
+ * Demonstrates renaming packages in J2ObjC.
+ */
+@ObjectiveCName("MyProject")
+package com.example.myproject;
+
+import com.google.j2objc.annotations.ObjectiveCName;

src/main/java/com/google/devtools/build/lib/bazel/rules/BazelRuleClassProvider.java

@@ -51,6 +51,7 @@
 import com.google.devtools.build.lib.bazel.rules.java.BazelJavaRuleClasses;
 import com.google.devtools.build.lib.bazel.rules.java.BazelJavaTestRule;
 import com.google.devtools.build.lib.bazel.rules.objc.BazelIosTestRule;
+import com.google.devtools.build.lib.bazel.rules.objc.BazelJ2ObjcLibraryRule;
 import com.google.devtools.build.lib.bazel.rules.python.BazelPyBinaryRule;
 import com.google.devtools.build.lib.bazel.rules.python.BazelPyLibraryRule;
 import com.google.devtools.build.lib.bazel.rules.python.BazelPyRuleClasses;
@@ -95,7 +96,6 @@
 import com.google.devtools.build.lib.rules.java.JavaToolchainRule;
 import com.google.devtools.build.lib.rules.java.Jvm;
 import com.google.devtools.build.lib.rules.java.JvmConfigurationLoader;
-import com.google.devtools.build.lib.rules.objc.BazelJ2ObjcLibraryRule;
 import com.google.devtools.build.lib.rules.objc.ExperimentalIosTestRule;
 import com.google.devtools.build.lib.rules.objc.IosApplicationRule;
 import com.google.devtools.build.lib.rules.objc.IosDeviceRule;
@@ -279,6 +279,8 @@ public static void setup(ConfiguredRuleClassProvider.Builder builder) {
           ResourceFileLoader.loadResource(BazelJavaRuleClasses.class, "jdk.WORKSPACE"));
       builder.addWorkspaceFile(
           ResourceFileLoader.loadResource(BazelAndroidSemantics.class, "android.WORKSPACE"));
+      builder.addWorkspaceFile(
+          ResourceFileLoader.loadResource(BazelJ2ObjcLibraryRule.class, "j2objc.WORKSPACE"));
     } catch (IOException e) {
       throw new IllegalStateException(e);
     }

src/main/java/com/google/devtools/build/lib/rules/objc/BazelJ2ObjcLibraryRule.java → src/main/java/com/google/devtools/build/lib/bazel/rules/objc/BazelJ2ObjcLibraryRule.java

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.devtools.build.lib.rules.objc;
+package com.google.devtools.build.lib.bazel.rules.objc;
 
 import static com.google.devtools.build.lib.packages.Attribute.attr;
 import static com.google.devtools.build.lib.packages.Type.LABEL_LIST;
@@ -21,6 +21,9 @@
 import com.google.devtools.build.lib.analysis.RuleDefinitionEnvironment;
 import com.google.devtools.build.lib.packages.RuleClass;
 import com.google.devtools.build.lib.packages.RuleClass.Builder;
+import com.google.devtools.build.lib.rules.objc.J2ObjcAspect;
+import com.google.devtools.build.lib.rules.objc.J2ObjcLibrary;
+import com.google.devtools.build.lib.rules.objc.J2ObjcLibraryBaseRule;
 
 /**
  * Concrete implementation of J2ObjCLibraryBaseRule.