[android] #5610 - Initial Runtime Style Bindings

[android] #5610 - Adjusted public api after discussion

[android] #5610 - added jni binding for NativeMapView#getLayer

[android] #5610 - Added initial test Activity

[android] #5610 - Started on NativePeer implementation for Layer

[android] #5610 - replaced low-level jni code with high-level for native getLayer

[android] 5610 - completed basic layer peer class - constructible from java and c++

[android] #5610 - removed reference that was redundant and causing the finalizer exception

[android] #5610 - Added a property peer

[android] #5610 - added value type to do type conversions - wip

[android] #5610 - simplified property conversion approach - wrapped value with jenv

[android] #5610 - added some more value conversions

[android] #5610 - Finished conversion for basic types

[android] #5610 - allow color's to be set as either an android color int or a String to support all formats in the spec

[android] #5610 - encode color ints as rgba to retain alpha channel

[android] #5610 - recalculate classes after paint property

[android] #5610 - more examples

[android] #5610 - fixed the example

[android] #5610 - cleaned up example code before continueing

[android] #5610 - added layout property example

[android] #5610 - set visibility on layer

[android] #5610 - added removeLayer and example

[android] #5610 - added more type conversions

[android] #5610 - Started on peer classes for layer implementations - WIP

[android] #5610 - First complete layer subclass peer implementation

[android] #5610 - added a little bit of structure before adding the other layer types

[android] #5610 - generate the c++ headers from the style spec

[android] #5610 - make sure the visibility is set as a string

[android] #5610 - Generate c++ layer peer class implementations from the style spec

[android] #5610 - generate java layer peer classes

[android] #5610 - cleanup comments

[android] #5610 - register all c++ peer classes with jni

[android] #5610 - addLayer

[android] #5610 - comment out broken case

[android] #5610 - Sources api - very much WIP

[android] 5610 - GeoJson source implementation and geojson conversion

[android] #5610 - cleanup add source/layer example a bit

[android] #5610 - initial filter api

[android] #5610 - Added filter api on the relevant Layer classes

[android] #5610 - raster layer is not filterable

[android] #5610 - actually make it compile

[android] #5610 - completed filter implementation

[android] #5610 - Vector and Raster Source + examples

[android] #5610 - removed superfluous interface, moved filters to the correct package

[android] #5610 - fixed comments

[android] #5610 - moved tests to the right package

[android] #5610 - hide difference between paint and layout properties in public api, make more performant set method for proeprties

[android] #5610 - fix rebase issue

6 files changed, 347 insertions, 0 deletions

diff --git a/platform/android/scripts/generate-style-code.js b/platform/android/scripts/generate-style-code.js
new file mode 100644
index 0000000000..03bfac8067
--- /dev/null
+++ b/platform/android/scripts/generate-style-code.js
@@ -0,0 +1,114 @@
+'use strict';
+
+const fs = require('fs');
+const ejs = require('ejs');
+const spec = require('mapbox-gl-style-spec').latest;
+const _ = require('lodash');
+
+global.iff = function (condition, val) {
+  return condition() ? val : "";
+}
+
+
+global.camelize = function (str) {
+  return str.replace(/(?:^|-)(.)/g, function (_, x) {
+    return x.toUpperCase();
+  });
+}
+
+global.camelizeWithLeadingLowercase = function (str) {
+  return str.replace(/-(.)/g, function (_, x) {
+    return x.toUpperCase();
+  });
+}
+
+global.snakeCaseUpper = function (str) {
+  return str.replace(/-/g, "_").toUpperCase();
+}
+
+global.propertyType = function propertyType(property) {
+//TODO: Doe we want these exceptions?
+//  if (/-translate-anchor$/.test(property.name)) {
+     //    return 'TranslateAnchorType';
+     //  }
+     //  if (/-(rotation|pitch)-alignment$/.test(property.name)) {
+     //    return 'AlignmentType';
+     //  }
+  switch (property.type) {
+      case 'boolean':
+        return 'Boolean';
+      case 'number':
+        return 'Float';
+      case 'string':
+        return 'String';
+      case 'enum':
+        return `String`;
+      case 'color':
+        return `String`;
+      case 'array':
+        return `${propertyType({type:property.value})}[]`;
+      default:
+        throw new Error(`unknown type for ${property.name}`);
+  }
+}
+
+global.propertyTypeAnnotation = function propertyTypeAnnotation(property) {
+  switch (property.type) {
+      case 'enum':
+        return `@Property.${snakeCaseUpper(property.name)}`;
+      default:
+        return "";
+  }
+};
+
+//Process Layers
+const layers = spec.layer.type.values.map((type) => {
+  const layoutProperties = Object.keys(spec[`layout_${type}`]).reduce((memo, name) => {
+    if (name !== 'visibility') {
+      spec[`layout_${type}`][name].name = name;
+      memo.push(spec[`layout_${type}`][name]);
+    }
+    return memo;
+  }, []);
+
+  const paintProperties = Object.keys(spec[`paint_${type}`]).reduce((memo, name) => {
+    spec[`paint_${type}`][name].name = name;
+    memo.push(spec[`paint_${type}`][name]);
+    return memo;
+  }, []);
+
+  return {
+    type: type,
+    layoutProperties: layoutProperties,
+    paintProperties: paintProperties,
+  };
+});
+
+const layerHpp = ejs.compile(fs.readFileSync('platform/android/scripts/layer.hpp.ejs', 'utf8'), {strict: true});
+const layerCpp = ejs.compile(fs.readFileSync('platform/android/scripts/layer.cpp.ejs', 'utf8'), {strict: true});
+const layerJava = ejs.compile(fs.readFileSync('platform/android/scripts/layer.java.ejs', 'utf8'), {strict: true});
+
+for (const layer of layers) {
+  fs.writeFileSync(`platform/android/src/style/layers/${layer.type}_layer.hpp`, layerHpp(layer));
+  fs.writeFileSync(`platform/android/src/style/layers/${layer.type}_layer.cpp`, layerCpp(layer));
+  fs.writeFileSync(`platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/style/layers/${camelize(layer.type)}Layer.java`, layerJava(layer));
+}
+
+//Process all layer properties
+const layoutProperties = _(layers).map('layoutProperties').flatten().value();
+const paintProperties = _(layers).map('paintProperties').flatten().value();
+
+const propertiesTemplate = ejs.compile(fs.readFileSync('platform/android/scripts/layer_property_factory.java.ejs', 'utf8'), {strict: true});
+fs.writeFileSync(
+    `platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/style/layers/PropertyFactory.java`,
+    propertiesTemplate({layoutProperties: layoutProperties, paintProperties: paintProperties})
+);
+
+//Create types for the enum properties
+const enumProperties = _(layoutProperties).union(paintProperties).filter({'type': 'enum'}).value();
+const enumPropertyTemplate = ejs.compile(fs.readFileSync('platform/android/scripts/layer_property.java.ejs', 'utf8'), {strict: true});
+fs.writeFileSync(
+    `platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/style/layers/Property.java`,
+    enumPropertyTemplate({properties: enumProperties})
+);
+
diff --git a/platform/android/scripts/layer.cpp.ejs b/platform/android/scripts/layer.cpp.ejs
new file mode 100644
index 0000000000..b53bc3c4d6
--- /dev/null
+++ b/platform/android/scripts/layer.cpp.ejs
@@ -0,0 +1,64 @@
+<%
+  const type = locals.type;
+-%>
+// This file is generated. Edit android/platform/scripts/generate-style-code.js, then run `make style-code-android`.
+
+#include "<%- type %>_layer.hpp"
+
+#include <string>
+
+//XXX
+#include <mbgl/platform/log.hpp>
+
+namespace mbgl {
+namespace android {
+
+<% if (type === 'background') { -%>
+    <%- camelize(type) %>Layer::<%- camelize(type) %>Layer(jni::JNIEnv& env, jni::String layerId)
+        : Layer(env, std::make_unique<mbgl::style::<%- camelize(type) %>Layer>(jni::Make<std::string>(env, layerId))) {
+<% } else { -%>
+    <%- camelize(type) %>Layer::<%- camelize(type) %>Layer(jni::JNIEnv& env, jni::String layerId, jni::String sourceId)
+        : Layer(env, std::make_unique<mbgl::style::<%- camelize(type) %>Layer>(jni::Make<std::string>(env, layerId), jni::Make<std::string>(env, sourceId))) {
+<% } -%>
+        mbgl::Log::Debug(mbgl::Event::JNI, "<%- camelize(type) %>Layer constructed, owning reference");
+    }
+
+    <%- camelize(type) %>Layer::<%- camelize(type) %>Layer(mbgl::Map& map, mbgl::style::<%- camelize(type) %>Layer& coreLayer)
+        : Layer(map, coreLayer) {
+
+        mbgl::Log::Debug(mbgl::Event::JNI, "<%- camelize(type) %>Layer Non-owning reference constructor");
+    }
+
+    <%- camelize(type) %>Layer::~<%- camelize(type) %>Layer() = default;
+
+    jni::Class<<%- camelize(type) %>Layer> <%- camelize(type) %>Layer::javaClass;
+
+    jni::jobject* <%- camelize(type) %>Layer::createJavaPeer(jni::JNIEnv& env) {
+        static auto constructor = <%- camelize(type) %>Layer::javaClass.template GetConstructor<jni::jlong>(env);
+        return <%- camelize(type) %>Layer::javaClass.New(env, constructor, reinterpret_cast<jni::jlong>(this));
+    }
+
+    void <%- camelize(type) %>Layer::registerNative(jni::JNIEnv& env) {
+        mbgl::Log::Debug(mbgl::Event::JNI, "Registering native background layer");
+
+        //Lookup the class
+        <%- camelize(type) %>Layer::javaClass = *jni::Class<<%- camelize(type) %>Layer>::Find(env).NewGlobalRef(env).release();
+
+        #define METHOD(MethodPtr, name) jni::MakeNativePeerMethod<decltype(MethodPtr), (MethodPtr)>(name)
+
+        //Register the peer
+        jni::RegisterNativePeer<<%- camelize(type) %>Layer>(
+            env, <%- camelize(type) %>Layer::javaClass, "nativePtr",
+<% if (type === 'background') { -%>
+            std::make_unique<<%- camelize(type) %>Layer, JNIEnv&, jni::String>,
+<% } else { -%>
+            std::make_unique<<%- camelize(type) %>Layer, JNIEnv&, jni::String, jni::String>,
+<% } -%>
+            "initialize",
+            "finalize"
+        );
+
+    }
+
+} // namespace android
+} // namespace mbgl
diff --git a/platform/android/scripts/layer.hpp.ejs b/platform/android/scripts/layer.hpp.ejs
new file mode 100644
index 0000000000..f735e3e35c
--- /dev/null
+++ b/platform/android/scripts/layer.hpp.ejs
@@ -0,0 +1,38 @@
+<%
+  const type = locals.type;
+-%>
+// This file is generated. Edit android/platform/scripts/generate-style-code.js, then run `make style-code-android`.
+
+#pragma once
+
+#include "layer.hpp"
+#include <mbgl/style/layers/<%- type %>_layer.hpp>
+#include <jni/jni.hpp>
+
+namespace mbgl {
+namespace android {
+
+class <%- camelize(type) %>Layer : public Layer {
+public:
+
+    static constexpr auto Name() { return "com/mapbox/mapboxsdk/style/layers/<%- camelize(type) %>Layer"; };
+
+    static jni::Class<<%- camelize(type) %>Layer> javaClass;
+
+    static void registerNative(jni::JNIEnv&);
+
+<% if (type === 'background') { -%>
+    <%- camelize(type) %>Layer(jni::JNIEnv&, jni::String);
+<% } else { -%>
+    <%- camelize(type) %>Layer(jni::JNIEnv&, jni::String, jni::String);
+<% } -%>
+
+    <%- camelize(type) %>Layer(mbgl::Map&, mbgl::style::<%- camelize(type) %>Layer&);
+
+    ~<%- camelize(type) %>Layer();
+
+    jni::jobject* createJavaPeer(jni::JNIEnv&);
+};
+
+} // namespace android
+} // namespace mbgl
diff --git a/platform/android/scripts/layer.java.ejs b/platform/android/scripts/layer.java.ejs
new file mode 100644
index 0000000000..a5ca4c0521
--- /dev/null
+++ b/platform/android/scripts/layer.java.ejs
@@ -0,0 +1,44 @@
+<%
+  const type = locals.type;
+-%>
+// This file is generated. Edit android/platform/scripts/generate-style-code.js, then run `make style-code-android`.
+package com.mapbox.mapboxsdk.style.layers;
+
+/**
+ * <%- camelize(type) %> Layer
+ */
+public class <%- camelize(type) %>Layer extends Layer {
+
+    public <%- camelize(type) %>Layer(long nativePtr) {
+        super(nativePtr);
+    }
+
+<% if (type === 'background') { -%>
+    public <%- camelize(type) %>Layer(String layerId) {
+        initialize(layerId);
+    }
+
+    protected native void initialize(String layerId);
+<% } else { -%>
+    public <%- camelize(type) %>Layer(String layerId, String sourceId) {
+        initialize(layerId, sourceId);
+    }
+
+    protected native void initialize(String layerId, String sourceId);
+
+    public void setSourceLayer(String sourceLayer) {
+        nativeSetSourceLayer(sourceLayer);
+    }
+<% } -%>
+
+<% if (type !== 'background' && type !== 'raster') { -%>
+    public void setFilter(Filter.Statement filter) {
+        this.setFilter(filter.toArray());
+    }
+
+    public void setFilter(Object[] filter) {
+        nativeSetFilter(filter);
+    }
+
+<% } -%>
+}
diff --git a/platform/android/scripts/layer_property.java.ejs b/platform/android/scripts/layer_property.java.ejs
new file mode 100644
index 0000000000..7119feeef2
--- /dev/null
+++ b/platform/android/scripts/layer_property.java.ejs
@@ -0,0 +1,42 @@
+<%
+  const properties = locals.properties;
+-%>
+// This file is generated. Edit android/platform/scripts/generate-style-code.js, then run `make style-code-android`.
+package com.mapbox.mapboxsdk.style.layers;
+
+import android.support.annotation.StringDef;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Paint/Layout properties for Layer
+ */
+public abstract class Property<T> {
+
+<% for (const property of properties) { -%>
+    //<%- property.name %>
+<% for (const value of property.values) { -%>
+    public static final String <%- snakeCaseUpper(property.name) %>_<%- snakeCaseUpper(value) %> = "<%- value %>";
+<% } -%>
+
+    @StringDef({
+    <% for (const value of property.values) { -%>
+        <%- snakeCaseUpper(property.name) %>_<%- snakeCaseUpper(value) %>,
+    <% } -%>
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface <%- snakeCaseUpper(property.name) %> {}
+
+<% } -%>
+
+    //Class definition
+    public final String name;
+    public final T value;
+
+    /* package */ Property(String name, T value) {
+        this.name = name;
+        this.value = value;
+    }
+
+}
diff --git a/platform/android/scripts/layer_property_factory.java.ejs b/platform/android/scripts/layer_property_factory.java.ejs
new file mode 100644
index 0000000000..045f206d3f
--- /dev/null
+++ b/platform/android/scripts/layer_property_factory.java.ejs
@@ -0,0 +1,45 @@
+<%
+  const paintProperties = locals.paintProperties;
+  const layoutProperties = locals.layoutProperties;
+-%>
+// This file is generated. Edit android/platform/scripts/generate-style-code.js, then run `make style-code-android`.
+package com.mapbox.mapboxsdk.style.layers;
+
+import android.annotation.SuppressLint;
+import android.support.annotation.ColorInt;
+
+/**
+ * Constructs paint/layout properties for Layers
+ * @see <a href="https://www.mapbox.com/mapbox-gl-style-spec/#layers>Layer style documentation</a>
+ *
+ */
+public class PropertyFactory {
+
+    public static Property<String> visibility(Boolean visible) {
+        return new LayoutProperty<>("visibility", visible? "visible": "none");
+    }
+
+<% for (const property of paintProperties) { -%>
+<% if (property.type == 'color') { -%>
+    public static Property<String> <%- camelizeWithLeadingLowercase(property.name) %>(@ColorInt int value) {
+        return new PaintProperty<>("<%-  property.name %>", colorToRgbaString(value));
+    }
+
+<% } -%>
+    public static Property<<%- propertyType(property) %>> <%- camelizeWithLeadingLowercase(property.name) %>(<%- propertyTypeAnnotation(property) %><%- iff(() => propertyTypeAnnotation(property), " ") %><%- propertyType(property) %> value) {
+        return new PaintProperty<>("<%-  property.name %>", value);
+    }
+
+<% } -%>
+<% for (const property of layoutProperties) { -%>
+    public static Property<<%- propertyType(property) %>> <%- camelizeWithLeadingLowercase(property.name) %>(<%- propertyTypeAnnotation(property) %><%- iff(() => propertyTypeAnnotation(property), " ") %><%- propertyType(property) %> value) {
+        return new LayoutProperty<>("<%-  property.name %>", value);
+    }
+
+<% } -%>
+    @SuppressLint("DefaultLocale")
+    static String colorToRgbaString(@ColorInt int value) {
+        return String.format("rgba(%d, %d, %d, %d)", (value >> 16) & 0xFF, (value >> 8) & 0xFF, value & 0xFF, (value >> 24) & 0xFF);
+    }
+
+}