Improve Java support

kapsule-core/src/main/kotlin/space/traversal/kapsule/Delegate.kt

@@ -21,7 +21,8 @@ import kotlin.reflect.KProperty
  */
 sealed class Delegate<in M, T>(internal val initializer: M.() -> T?) {
 
-    internal var value: T? = null
+    var value: T? = null
+        internal set
 
     /**
      * Initializes value from the injection module.

samples/android/src/main/AndroidManifest.xml

@@ -26,6 +26,9 @@
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
+        <activity
+                android:name=".view.CounterActivity"
+                android:label="@string/title_counter"/>
     </application>
 
 </manifest>

samples/android/src/main/java/space/traversal/kapsule/demo/view/CounterActivity.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2017 Traversal Space
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package space.traversal.kapsule.demo.view;
+
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v7.app.AppCompatActivity;
+import android.widget.TextView;
+import kotlin.jvm.functions.Function1;
+import space.traversal.kapsule.Delegate;
+import space.traversal.kapsule.Kapsule;
+import space.traversal.kapsule.demo.App;
+import space.traversal.kapsule.demo.R;
+import space.traversal.kapsule.demo.data.Dao;
+import space.traversal.kapsule.demo.di.Module;
+
+/**
+ * Counter activity showcasing that Kapsule still works with Java, even if it's not pretty.
+ */
+public class CounterActivity extends AppCompatActivity {
+
+    private final Kapsule<Module> mKap = new Kapsule<>();
+    private final Delegate<Module, Dao> mDao = mKap.required(new Function1<Module, Dao>() {
+        @Override
+        public Dao invoke(Module module) {
+            return module.getDao();
+        }
+    });
+
+    private TextView mCounterTextView;
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_counter);
+        mKap.inject(App.Companion.module(this));
+
+        mCounterTextView = (TextView) findViewById(R.id.txt_counter);
+    }
+
+    @Override
+    protected void onStart() {
+        super.onStart();
+
+        updateCount();
+    }
+
+    /**
+     * Fetches count from the DAO and applies it to the text view.
+     */
+    private void updateCount() {
+        if (mDao.getValue() != null) {
+            String text = Integer.toString(mDao.getValue().fetchCount());
+            mCounterTextView.setText(text);
+        }
+    }
+}

samples/android/src/main/java/space/traversal/kapsule/demo/view/HomeActivity.kt

@@ -10,8 +10,11 @@
 
 package space.traversal.kapsule.demo.view
 
+import android.content.Intent
 import android.os.Bundle
 import android.support.v7.app.AppCompatActivity
+import android.view.Menu
+import android.view.MenuItem
 import kotlinx.android.synthetic.main.activity_main.*
 import space.traversal.kapsule.Injects
 import space.traversal.kapsule.Kapsule
@@ -43,6 +46,19 @@ class HomeActivity : AppCompatActivity(), HomeView, Injects<Module> {
         presenter.load()
     }
 
+    override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+        menuInflater.inflate(R.menu.main, menu)
+        return true
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem?) = when (item?.itemId) {
+        R.id.menu_counter -> {
+            startActivity(Intent(this, CounterActivity::class.java))
+            true
+        }
+        else -> super.onOptionsItemSelected(item)
+    }
+
     override fun onDestroy() {
         presenter.detach()
         super.onDestroy()

samples/android/src/main/res/layout/activity_counter.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2017 Traversal Space
+  ~
+  ~ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+  ~
+  ~ The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+  ~
+  ~ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+  -->
+
+<TextView
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:tools="http://schemas.android.com/tools"
+        android:id="@+id/txt_counter"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:textSize="30sp"
+        tools:text="10"/>

samples/android/src/main/res/menu/main.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2017 Traversal Space
+  ~
+  ~ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+  ~
+  ~ The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+  ~
+  ~ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+  -->
+
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+      xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+            android:id="@+id/menu_counter"
+            android:title="@string/title_counter"
+            app:showAsAction="ifRoom"/>
+
+</menu>

samples/android/src/main/res/values/strings.xml

@@ -11,6 +11,9 @@
 <resources>
 
     <string name="app_name">Kapsule Demo</string>
+
+    <string name="title_counter">Counter</string>
+
     <string name="button_add">Add</string>
     <string name="button_remove">Remove</string>