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// ./android/app/src/main/java/com/cppreactnative/helloworld/HelloWorldModule.java

package com.cppreactnative.helloworld;

import com.facebook.react.bridge.Promise;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.bridge.ReactContextBaseJavaModule;
import com.facebook.react.bridge.ReactMethod;

public class HelloWorldModule extends ReactContextBaseJavaModule {

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// ios/ReactBridge/RCTHelloWorld.m
#import "RCTHelloWorld.h"
#import "HWHelloWorld.h"
@implementation RCTHelloWorld{
  HWHelloWorld *_cppApi;
}
- (RCTHelloWorld *)init
{
  self = [super init];
  _cppApi = [HWHelloWorld create];

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#!/usr/bin/env bash
### Configuration
# Djinni IDL file location
djinni_file="helloworld.djinni"
# C++ namespace for generated src
namespace="helloworld"
# Objective-C class name prefix for generated src
objc_prefix="HW"
# Java package name for generated src
java_package="com.cppreactnative.helloworld"

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hello_world = interface +c {
  static create(): hello_world;
  get_hello_world(): string;
}

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#include "hello_world_impl.hpp"
#include <string>
 
namespace helloworld {
    
    std::shared_ptr<HelloWorld> HelloWorld::create() {
        return std::make_shared<HelloWorldImpl>();
    }
    
    HelloWorldImpl::HelloWorldImpl() {

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#pragma once
 
#include "hello_world.hpp"
 
namespace helloworld {
    
    class HelloWorldImpl : public helloworld::HelloWorld {
        
    public:
        

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// alter your android/app/src/main/java/com/cppreactnative/MainApplication.java

import com.cppreactnative.helloworld.HelloWorldPackage; // Add this import statement

//...

@Override
protected List<ReactPackage> getPackages() {
  return Arrays.<ReactPackage>asList(

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// android/app/src/main/java/com/cppreactnative/helloworld/HelloWorldPackage.java
package com.cppreactnative.helloworld;

import com.facebook.react.ReactPackage;
import com.facebook.react.bridge.NativeModule;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.uimanager.ViewManager;

import java.util.ArrayList;
import java.util.Collections;

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// android/app/src/main/java/com/cppreactnative/helloworld/HelloWorldModule.java
package com.cppreactnative.helloworld;

import com.facebook.react.bridge.Promise;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.bridge.ReactContextBaseJavaModule;
import com.facebook.react.bridge.ReactMethod;

public class HelloWorldModule extends ReactContextBaseJavaModule {

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// ./ios/ReactBridge/RCTHelloWorld.m
#import "RCTHelloWorld.h"

@implementation RCTHelloWorld

RCT_EXPORT_MODULE();

RCT_REMAP_METHOD(sayHello,
                 resolver:(RCTPromiseResolveBlock)resolve
                 rejecter:(RCTPromiseRejectBlock)reject)