J2Ojbc native compile- guava headers missing

Question

We are porting an iOS application to Android and are exploring J2objc and protobuf. So far we are working through the issues (we're new to Android and a number of them are due to learning curve).

This particular issue seems like a bug on the latest version of j2objc-1.0-2.2. The #includes in the translated objective c implementation classes are not being changed to camel case. Has anyone seen this behavior? Is this a bug or some setting we're missing?

Thanks for your help.

Here is the compilation error:

GcatMobile/shared/build/j2objcSrcGenMain/com/gcatconsult/shared/remote/NetworkBase.m:14:10: fatal error:
'com/google/common/io/BaseEncoding.h' file not found

#include "com/google/common/io/BaseEncoding.h"

Here are the #includes in NetworkBase.m, my translated implementation class:

#include "IOSClass.h"
#include "IOSPrimitiveArray.h"
#include "J2ObjC_source.h"
#include "com/gcatconsult/shared/messages/nano/Resp.h"
#include "com/gcatconsult/shared/remote/NetworkBase.h"
#include "com/google/common/io/BaseEncoding.h"
#include "com/google/protobuf/nano/MessageNano.h"
#include "java/io/BufferedInputStream.h"
#include "java/io/ByteArrayOutputStream.h"
#include "java/io/InputStream.h"
#include "java/io/OutputStream.h"
#include "java/io/PrintStream.h"
#include "java/lang/Exception.h"
#include "java/lang/Integer.h"
#include "java/lang/System.h"
#include "java/net/HttpURLConnection.h"
#include "java/net/MalformedURLException.h"
#include "java/net/URL.h"
#include "java/net/URLConnection.h"
#include "java/util/zip/GZIPOutputStream.h"

Here is the build.gradle file:

plugins {
    id 'java'
    id "com.github.j2objccontrib.j2objcgradle" version "0.6.0-alpha"
    id "com.google.protobuf" version "0.7.5"
}

sourceSets {
    main.java.srcDirs += 'src/main/javanano'
}

dependencies {
    // Any libraries you depend on, like Guava or JUnit
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.google.guava:guava:19.0'
    compile 'com.google.protobuf.nano:protobuf-javanano:3.0.0-alpha-5'
    testCompile 'junit:junit:4.12'
}

protobuf {
    protoc {
        artifact = "com.google.protobuf:protoc:3.0.0-beta-2"
    }

    generateProtoTasks {
        all().each { task ->
            task.builtins {
                remove java
                javanano {
                    option 'java_multiple_files=true'
                    option 'ignore_services=true'
                }
            }
        }
    }
    generatedFilesBaseDir = "$projectDir/src"
}


// Plugin settings; put these at the bottom of the file.
j2objcConfig {
    // Sets up libraries you depend on
    autoConfigureDeps true
    skipJ2objcVerification true
    translateClasspaths = ["../../SoftwareDev/NgCalDev/External/j2objc-1.0-2.2/lib/guava-19.0.jar"]
    translateArgs '--prefixes', 'src/main/resources/prefixes.properties'
//    testMinExpectedTests 0

    // Omit these two lines if you don't configure your Xcode project with CocoaPods
//    xcodeProjectDir '../../NGCalDev/AuthTouchId'  //  suggested directory name
//    xcodeTargetsIos 'IOS-APP', 'IOS-APPTests'  // replace with your iOS targets

    finalConfigure()          // Must be last call to configuration
}

We are using J2objc 1.0-2.2, the latest version of Xcode: Version 7.3 (7D175), and OS X El Capitan Version 10.11.4

Answer 1

Guava is in the process of upgrading its API to Java 8, and so developers need a way to include different versions of it. The Guava includes were therefore moved to /include/guava/, so you need to add that path to your Header Search Paths.