/*

* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Common JNI implementations

 *

*/

// INTERNAL INCLUDES

#include "lapijnicommon.h"

#include "clapilandmark.h"

#include "lapipanics.h"

#include "jstringutils.h"

#include "s60commonutils.h"

#include "logger.h"

// EXTERNAL INCLUDES

#include <lbsposition.h>

// UNNAMED LOCAL NAMESPACE

namespace

{

// Size of the coordinates array (latitude and longitude)

const TInt KLAPINumCoordinates = 2;

// Size of the coordinate information array (altitude, horizontal

// accuracy and vertical accuracy

const TInt KLAPINumCoordinateInfos = 3;

}

/**

 * Sets an error code to an error array

 * @param aJniEnv Pointer to the JNI environment

 * @param aTo The array to which the error is to be added

 * @param aFrom The value which will be added to the array

 */

void SetJavaErrorCode(JNIEnv& aJniEnv, jintArray aTo, TInt aFrom)

{

    JELOG2(EJavaLocation);

    jint javaError[1] =

        { aFrom };

    aJniEnv.SetIntArrayRegion(aTo, 0, 1, javaError);

}

/**

 * Creates a position from the passed coordinate information

 * @param aJniEnv A reference to the JNI environment

 * @param aCoordinates Latitude and longitude values

 * @param aCoordinateInfo Altitude, horizontal accuracy and vertical accurazy

 */

TLocality CreatePosition(JNIEnv& aJniEnv, jdoubleArray aCoordinates,

                         jfloatArray aCoordinateInfo)

{

    JELOG2(EJavaLocation);

    __ASSERT_DEBUG(aCoordinates && aCoordinateInfo, LAPIError::Panic(

                       ELAPIPanicNullArgument));

    jdouble dArray[KLAPINumCoordinates];

    jfloat fArray[KLAPINumCoordinateInfos];

    // Get latitude and longitude

    aJniEnv.GetDoubleArrayRegion(aCoordinates, 0, KLAPINumCoordinates, dArray);

    // Get altitude, horizontal accuracy and vertical accuracy

    aJniEnv.GetFloatArrayRegion(aCoordinateInfo, 0, KLAPINumCoordinateInfos,

                                fArray);

    TCoordinate coordinates(dArray[0], dArray[1], fArray[0]);

    TLocality position(coordinates, fArray[1], fArray[2]);

    return position;

}

/**

 * Creates a position information from the passed position

 * @param aJniEnv A reference to the JNI environment

 * @param aCoordinates Latitude and longitude values

 * @param aCoordinateInfo Altitude, horizontal accuracy and vertical accurazy

 */

void CreateCoordinateInfos(JNIEnv& aJniEnv, const TLocality& aPosition,

                           jdoubleArray aCoordinates, jfloatArray aCoordinateInfo)

{

    JELOG2(EJavaLocation);

    __ASSERT_DEBUG(

        (aJniEnv.GetArrayLength(aCoordinates) >= KLAPINumCoordinates),

        LAPIError::Panic(ELAPIPanicJniIncorrectArrayLength));

    __ASSERT_DEBUG((aJniEnv.GetArrayLength(aCoordinateInfo)

                    >= KLAPINumCoordinateInfos), LAPIError::Panic(

                       ELAPIPanicJniIncorrectArrayLength));

    jdouble coordinates[KLAPINumCoordinates] =

        { aPosition.Latitude(), aPosition.Longitude() };

    jfloat coordinateInfo[KLAPINumCoordinateInfos] =

        { aPosition.Altitude(), aPosition.HorizontalAccuracy(),

          aPosition.VerticalAccuracy()

        };

    // Set coordinate values to the java array

    aJniEnv.SetDoubleArrayRegion(aCoordinates, 0, KLAPINumCoordinates,

                                 coordinates);

    // Set coordinate information to the java array

    aJniEnv.SetFloatArrayRegion(aCoordinateInfo, 0, KLAPINumCoordinateInfos,

                                coordinateInfo);

}

/**

 * Creates a new native string array from java string array

 * @param aJniEnv A reference to the JNI environment

 * @param aJavaArray The Java string array from which the new array is created

 */

RPointerArray<HBufC> CreateNativeStringArrayL(JNIEnv& aJniEnv,

        jobjectArray aJavaArray)

{

    JELOG2(EJavaLocation);

    TInt count = 0;

    if (aJavaArray)

    {

        count = aJniEnv.GetArrayLength(aJavaArray);

    }

    // Create pointer array holding HBufCs so that null java elements

    // can be represented as NULL pointers in the array

    RPointerArray<HBufC> nativeArray(10);

    CleanupResetAndDestroyPushL(nativeArray);

    for (TInt i = 0; i < count; i++)

    {

        // Creates a new local reference

        jobject joe = aJniEnv.GetObjectArrayElement(aJavaArray, i);

        jstring javaString = static_cast<jstring>(joe);

        if (!javaString)

        {

            nativeArray.AppendL(NULL);

        }

        else

        {

            // The value returned by GetObjectArrayElement is not really

            // a pointer to the object, but it is a "local reference".

            // In practice, it is a pointer to a pointer which points to the

            // object. If the object is null, we get a pointer which points

            // to a pointer which points to null.

            TAny** objPointer = reinterpret_cast<TAny**>(joe);

            TAny* obj = *objPointer;

            if (!obj)

            {

                nativeArray.AppendL(NULL);

            }

            else

            {

                JStringUtils nativeElem(aJniEnv, javaString);

                HBufC* element = nativeElem.AllocLC();

                nativeArray.AppendL(element);

                CleanupStack::Pop(element);

            }

        }

        // The VM runs out of temporary local references, unless the

        // elements are not released here

        aJniEnv.DeleteLocalRef(joe);

    }

    CleanupStack::Pop(&nativeArray);

    return nativeArray;

}

/**

 * Creates a new java string array from a native string array

 * @param aJniEnv A reference to the JNI environment

 * @param aNativeArray The native string array from which the new array is created

 */

jobjectArray CreateJavaStringArray(JNIEnv& aJniEnv,

                                   RPointerArray<HBufC>& aNativeArray)

{

    JELOG2(EJavaLocation);

    return java::util::S60CommonUtils::NativeToJavaStringArray(aJniEnv,

            aNativeArray);

}

jobjectArray CopyToNewJavaStringArrayL(JNIEnv& aJni,

                                       const CDesCArray& aNativeArray)

{

    JELOG2(EJavaLocation);

    jclass stringClass = aJni.FindClass("java/lang/String");

    User::LeaveIfNull(stringClass);

    //

    jobjectArray result = aJni.NewObjectArray(aNativeArray.Count(),

                          stringClass, NULL);

    if (result != NULL)

    {

        TPtrC item;

        for (int i = 0; i < aNativeArray.Count(); ++i)

        {

            item.Set(aNativeArray[i]);

            jstring javaString =

                java::util::S60CommonUtils::NativeToJavaString(aJni, item);

            User::LeaveIfNull(javaString);

            //

            aJni.SetObjectArrayElement(result, i, javaString);

            aJni.DeleteLocalRef(javaString);

        }

    }

    return result;

}

/**

 * Creates an item handle array from the paased landmarks

 * @param aJniEnv A reference to the JNI environment

 * @param aLandmarks The landmarks from which the handles are created

 * @return Java integer array. Ownership is transferred to the caller

 */

jintArray CreateHandleArray(JNIEnv& aJniEnv,

                            const CArrayPtr<CLAPILandmark>& aLandmarks)

{

    JELOG2(EJavaLocation);

    TInt count = aLandmarks.Count();

    jintArray handles = aJniEnv.NewIntArray(count);

    if (handles && count > 0)

    {

        jint* elems = aJniEnv.GetIntArrayElements(handles, NULL);

        if (!elems)

        {

            return NULL; // Error

        }

        // Make handles from the native side peer objects

        for (TInt i = 0; i < count; i++)

        {

            elems[i] = reinterpret_cast<jint>(aLandmarks[i]);

        }

        // Elemenet must be released since it is local

        aJniEnv.ReleaseIntArrayElements(handles, elems, 0);

    }

    return handles;

}

// End of file