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gecko-dev/extensions/java/xpcom/nsJavaWrapper.cpp

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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Java XPCOM Bindings.
*
* The Initial Developer of the Original Code is
* IBM Corporation.
* Portions created by the Initial Developer are Copyright (C) 2005
* IBM Corporation. All Rights Reserved.
*
* Contributor(s):
* Javier Pedemonte (jhpedemonte@gmail.com)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsJavaWrapper.h"
#include "nsJavaXPTCStub.h"
#include "nsJavaXPCOMBindingUtils.h"
#include "jni.h"
#include "xptcall.h"
#include "nsIInterfaceInfoManager.h"
#include "nsString.h"
#include "nsCRT.h"
#include "prmem.h"
#define JAVAPROXY_NATIVE(func) Java_org_mozilla_xpcom_XPCOMJavaProxy_##func
static nsID nullID = {0, 0, 0, {0, 0, 0, 0, 0, 0, 0, 0}};
nsresult
CreateJavaArray(JNIEnv* env, PRUint8 aType, PRUint32 aSize, const nsID& aIID,
jobject* aResult)
{
jobject array = nsnull;
switch (aType)
{
case nsXPTType::T_I8:
array = env->NewByteArray(aSize);
break;
case nsXPTType::T_I16:
case nsXPTType::T_U8:
array = env->NewShortArray(aSize);
break;
case nsXPTType::T_I32:
case nsXPTType::T_U16:
array = env->NewIntArray(aSize);
break;
case nsXPTType::T_I64:
case nsXPTType::T_U32:
array = env->NewLongArray(aSize);
break;
case nsXPTType::T_FLOAT:
array = env->NewFloatArray(aSize);
break;
// XXX how do we handle unsigned 64-bit values?
case nsXPTType::T_U64:
case nsXPTType::T_DOUBLE:
array = env->NewDoubleArray(aSize);
break;
case nsXPTType::T_BOOL:
array = env->NewBooleanArray(aSize);
break;
case nsXPTType::T_CHAR:
case nsXPTType::T_WCHAR:
array = env->NewCharArray(aSize);
break;
case nsXPTType::T_CHAR_STR:
case nsXPTType::T_WCHAR_STR:
case nsXPTType::T_IID:
case nsXPTType::T_ASTRING:
case nsXPTType::T_DOMSTRING:
case nsXPTType::T_UTF8STRING:
case nsXPTType::T_CSTRING:
array = env->NewObjectArray(aSize, stringClass, nsnull);
break;
case nsXPTType::T_INTERFACE:
case nsXPTType::T_INTERFACE_IS:
{
nsCOMPtr<nsIInterfaceInfoManager> iim =
getter_AddRefs(XPTI_GetInterfaceInfoManager());
NS_ASSERTION(iim != nsnull, "Failed to get InterfaceInfoManager");
if (!iim)
return NS_ERROR_FAILURE;
// Get interface info for given IID
nsCOMPtr<nsIInterfaceInfo> info;
nsresult rv = iim->GetInfoForIID(&aIID, getter_AddRefs(info));
if (NS_FAILED(rv))
return rv;
// Get interface name
const char* iface_name;
rv = info->GetNameShared(&iface_name);
if (NS_FAILED(rv))
return rv;
// Create proper Java interface name
nsCAutoString class_name("org/mozilla/xpcom/");
class_name.AppendASCII(iface_name);
jclass ifaceClass = env->FindClass(class_name.get());
if (!ifaceClass)
return NS_ERROR_FAILURE;
array = env->NewObjectArray(aSize, ifaceClass, nsnull);
break;
}
case nsXPTType::T_VOID:
array = env->NewIntArray(aSize);
break;
default:
NS_WARNING("unknown type");
return NS_ERROR_FAILURE;
}
if (!array)
return NS_ERROR_OUT_OF_MEMORY;
*aResult = array;
return NS_OK;
}
nsresult
GetNativeArrayElement(PRUint8 aType, void* aArray, PRUint32 aIndex,
nsXPTCVariant* aResult)
{
switch (aType)
{
case nsXPTType::T_I8:
case nsXPTType::T_U8:
aResult->val.u8 = NS_STATIC_CAST(PRUint8*, aArray)[aIndex];
break;
case nsXPTType::T_I16:
case nsXPTType::T_U16:
aResult->val.u16 = NS_STATIC_CAST(PRUint16*, aArray)[aIndex];
break;
case nsXPTType::T_I32:
case nsXPTType::T_U32:
aResult->val.u32 = NS_STATIC_CAST(PRUint32*, aArray)[aIndex];
break;
case nsXPTType::T_I64:
case nsXPTType::T_U64:
aResult->val.u64 = NS_STATIC_CAST(PRUint64*, aArray)[aIndex];
break;
case nsXPTType::T_FLOAT:
aResult->val.f = NS_STATIC_CAST(float*, aArray)[aIndex];
break;
case nsXPTType::T_DOUBLE:
aResult->val.d = NS_STATIC_CAST(double*, aArray)[aIndex];
break;
case nsXPTType::T_BOOL:
aResult->val.b = NS_STATIC_CAST(PRBool*, aArray)[aIndex];
break;
case nsXPTType::T_CHAR:
aResult->val.c = NS_STATIC_CAST(char*, aArray)[aIndex];
break;
case nsXPTType::T_WCHAR:
aResult->val.wc = NS_STATIC_CAST(PRUnichar*, aArray)[aIndex];
break;
case nsXPTType::T_CHAR_STR:
aResult->val.p = NS_STATIC_CAST(char**, aArray)[aIndex];
break;
case nsXPTType::T_WCHAR_STR:
aResult->val.p = NS_STATIC_CAST(PRUnichar**, aArray)[aIndex];
break;
case nsXPTType::T_IID:
aResult->val.p = NS_STATIC_CAST(nsID**, aArray)[aIndex];
break;
case nsXPTType::T_INTERFACE:
case nsXPTType::T_INTERFACE_IS:
aResult->val.p = NS_STATIC_CAST(nsISupports**, aArray)[aIndex];
break;
case nsXPTType::T_ASTRING:
case nsXPTType::T_DOMSTRING:
aResult->val.p = NS_STATIC_CAST(nsString**, aArray)[aIndex];
break;
case nsXPTType::T_UTF8STRING:
case nsXPTType::T_CSTRING:
aResult->val.p = NS_STATIC_CAST(nsCString**, aArray)[aIndex];
break;
case nsXPTType::T_VOID:
aResult->val.u32 = NS_STATIC_CAST(PRUint32*, aArray)[aIndex];
break;
default:
NS_WARNING("unknown type");
return NS_ERROR_FAILURE;
}
return NS_OK;
}
nsresult
CreateNativeArray(PRUint8 aType, PRUint32 aSize, void** aResult)
{
void* array = nsnull;
switch (aType)
{
case nsXPTType::T_I8:
case nsXPTType::T_U8:
array = PR_Malloc(aSize * sizeof(PRUint8));
break;
case nsXPTType::T_I16:
case nsXPTType::T_U16:
array = PR_Malloc(aSize * sizeof(PRUint16));
break;
case nsXPTType::T_I32:
case nsXPTType::T_U32:
array = PR_Malloc(aSize * sizeof(PRUint32));
break;
case nsXPTType::T_I64:
case nsXPTType::T_U64:
array = PR_Malloc(aSize * sizeof(PRUint64));
break;
case nsXPTType::T_FLOAT:
array = PR_Malloc(aSize * sizeof(float));
break;
case nsXPTType::T_DOUBLE:
array = PR_Malloc(aSize * sizeof(double));
break;
case nsXPTType::T_BOOL:
array = PR_Malloc(aSize * sizeof(PRBool));
break;
case nsXPTType::T_CHAR:
array = PR_Malloc(aSize * sizeof(char));
break;
case nsXPTType::T_WCHAR:
array = PR_Malloc(aSize * sizeof(PRUnichar));
break;
case nsXPTType::T_CHAR_STR:
case nsXPTType::T_WCHAR_STR:
case nsXPTType::T_IID:
case nsXPTType::T_ASTRING:
case nsXPTType::T_DOMSTRING:
case nsXPTType::T_UTF8STRING:
case nsXPTType::T_CSTRING:
case nsXPTType::T_INTERFACE:
case nsXPTType::T_INTERFACE_IS:
array = PR_Malloc(aSize * sizeof(void*));
break;
case nsXPTType::T_VOID:
array = PR_Malloc(aSize * sizeof(PRUint32));
break;
default:
NS_WARNING("unknown type");
return NS_ERROR_FAILURE;
}
if (!array)
return NS_ERROR_OUT_OF_MEMORY;
*aResult = array;
return NS_OK;
}
/**
* Handle 'in' and 'inout' params.
*/
nsresult
SetupParams(JNIEnv *env, const jobject aParam, PRUint8 aType, PRBool aIsOut,
const nsID& aIID, PRUint8 aArrayType, PRUint32 aArraySize,
PRBool aIsArrayElement, PRUint32 aIndex, nsXPTCVariant &aVariant)
{
nsresult rv = NS_OK;
switch (aType)
{
case nsXPTType::T_I8:
{
LOG(("byte\n"));
if (!aIsOut && !aIsArrayElement) { // 'in'
aVariant.val.i8 = env->CallByteMethod(aParam, byteValueMID);
} else { // 'inout' & 'array'
jbyte value;
if (aParam) {
env->GetByteArrayRegion((jbyteArray) aParam, aIndex, 1, &value);
}
if (aIsOut) { // 'inout'
if (aParam) {
aVariant.val.i8 = value;
aVariant.ptr = &aVariant.val;
} else {
aVariant.ptr = nsnull;
}
aVariant.SetPtrIsData();
} else { // 'array'
NS_STATIC_CAST(PRInt8*, aVariant.val.p)[aIndex] = value;
}
}
break;
}
case nsXPTType::T_I16:
case nsXPTType::T_U8: // C++ unsigned octet <=> Java short
{
LOG(("short\n"));
if (!aIsOut && !aIsArrayElement) { // 'in'
aVariant.val.i16 = env->CallShortMethod(aParam, shortValueMID);
} else { // 'inout' & 'array'
jshort value;
if (aParam) {
env->GetShortArrayRegion((jshortArray) aParam, aIndex, 1, &value);
}
if (aIsOut) { // 'inout'
if (aParam) {
aVariant.val.i16 = value;
aVariant.ptr = &aVariant.val;
} else {
aVariant.ptr = nsnull;
}
aVariant.SetPtrIsData();
} else { // 'array'
if (aType == nsXPTType::T_I16)
NS_STATIC_CAST(PRInt16*, aVariant.val.p)[aIndex] = value;
else
NS_STATIC_CAST(PRUint8*, aVariant.val.p)[aIndex] = value;
}
}
break;
}
case nsXPTType::T_I32:
case nsXPTType::T_U16: // C++ unsigned short <=> Java int
{
LOG(("int\n"));
if (!aIsOut && !aIsArrayElement) { // 'in'
aVariant.val.i32 = env->CallIntMethod(aParam, intValueMID);
} else { // 'inout' & 'array'
jint value;
if (aParam) {
env->GetIntArrayRegion((jintArray) aParam, aIndex, 1, &value);
}
if (aIsOut) { // 'inout'
if (aParam) {
aVariant.val.i32 = value;
aVariant.ptr = &aVariant.val;
} else {
aVariant.ptr = nsnull;
}
aVariant.SetPtrIsData();
} else { // 'array'
if (aType == nsXPTType::T_I32)
NS_STATIC_CAST(PRInt32*, aVariant.val.p)[aIndex] = value;
else
NS_STATIC_CAST(PRUint16*, aVariant.val.p)[aIndex] = value;
}
}
break;
}
case nsXPTType::T_I64:
case nsXPTType::T_U32: // C++ unsigned int <=> Java long
{
LOG(("long\n"));
if (!aIsOut && !aIsArrayElement) { // 'in'
aVariant.val.i64 = env->CallLongMethod(aParam, longValueMID);
} else { // 'inout' & 'array'
jlong value;
if (aParam) {
env->GetLongArrayRegion((jlongArray) aParam, aIndex, 1, &value);
}
if (aIsOut) { // 'inout'
if (aParam) {
aVariant.val.i64 = value;
aVariant.ptr = &aVariant.val;
} else {
aVariant.ptr = nsnull;
}
aVariant.SetPtrIsData();
} else { // 'array'
if (aType == nsXPTType::T_I64)
NS_STATIC_CAST(PRInt64*, aVariant.val.p)[aIndex] = value;
else
NS_STATIC_CAST(PRUint32*, aVariant.val.p)[aIndex] = value;
}
}
break;
}
case nsXPTType::T_FLOAT:
{
LOG(("float\n"));
if (!aIsOut && !aIsArrayElement) { // 'in'
aVariant.val.f = env->CallFloatMethod(aParam, floatValueMID);
} else { // 'inout' & 'array'
jfloat value;
if (aParam) {
env->GetFloatArrayRegion((jfloatArray) aParam, aIndex, 1, &value);
}
if (aIsOut) { // 'inout'
if (aParam) {
aVariant.val.f = value;
aVariant.ptr = &aVariant.val;
} else {
aVariant.ptr = nsnull;
}
aVariant.SetPtrIsData();
} else { // 'array'
NS_STATIC_CAST(float*, aVariant.val.p)[aIndex] = value;
}
}
break;
}
// XXX how do we handle unsigned 64-bit value?
case nsXPTType::T_U64: // C++ unsigned long <=> Java double
case nsXPTType::T_DOUBLE:
{
LOG(("double\n"));
if (!aIsOut && !aIsArrayElement) { // 'in'
jdouble value = env->CallDoubleMethod(aParam, doubleValueMID);
if (aType == nsXPTType::T_DOUBLE)
aVariant.val.d = value;
else
aVariant.val.u64 = NS_STATIC_CAST(PRUint64, value);
} else { // 'inout' & 'array'
jdouble value;
if (aParam) {
env->GetDoubleArrayRegion((jdoubleArray) aParam, aIndex, 1, &value);
}
if (aIsOut) { // 'inout'
if (aParam) {
if (aType == nsXPTType::T_DOUBLE)
aVariant.val.d = value;
else
aVariant.val.u64 = NS_STATIC_CAST(PRUint64, value);
aVariant.ptr = &aVariant.val;
} else {
aVariant.ptr = nsnull;
}
aVariant.SetPtrIsData();
} else { // 'array'
if (aType == nsXPTType::T_DOUBLE)
NS_STATIC_CAST(double*, aVariant.val.p)[aIndex] = value;
else
NS_STATIC_CAST(PRUint64*, aVariant.val.p)[aIndex] =
NS_STATIC_CAST(PRUint64, value);
}
}
break;
}
case nsXPTType::T_BOOL:
{
LOG(("boolean\n"));
if (!aIsOut && !aIsArrayElement) { // 'in'
aVariant.val.b = env->CallBooleanMethod(aParam, booleanValueMID);
} else { // 'inout' & 'array'
jboolean value;
if (aParam) {
env->GetBooleanArrayRegion((jbooleanArray) aParam, aIndex, 1, &value);
}
if (aIsOut) { // 'inout'
if (aParam) {
aVariant.val.b = value;
aVariant.ptr = &aVariant.val;
} else {
aVariant.ptr = nsnull;
}
aVariant.SetPtrIsData();
} else { // 'array'
NS_STATIC_CAST(PRBool*, aVariant.val.p)[aIndex] = value;
}
}
break;
}
case nsXPTType::T_CHAR:
{
LOG(("char\n"));
if (!aIsOut && !aIsArrayElement) { // 'in'
aVariant.val.c = env->CallCharMethod(aParam, charValueMID);
} else { // 'inout' & 'array'
jchar value;
if (aParam) {
env->GetCharArrayRegion((jcharArray) aParam, aIndex, 1, &value);
}
if (aIsOut) { // 'inout'
if (aParam) {
aVariant.val.c = value;
aVariant.ptr = &aVariant.val;
} else {
aVariant.ptr = nsnull;
}
aVariant.SetPtrIsData();
} else { // 'array'
NS_STATIC_CAST(char*, aVariant.val.p)[aIndex] = value;
}
}
break;
}
case nsXPTType::T_WCHAR:
{
LOG(("char\n"));
if (!aIsOut && !aIsArrayElement) { // 'in'
aVariant.val.wc = env->CallCharMethod(aParam, charValueMID);
} else { // 'inout' & 'array'
jchar value;
if (aParam) {
env->GetCharArrayRegion((jcharArray) aParam, aIndex, 1, &value);
}
if (aIsOut) { // 'inout'
if (aParam) {
aVariant.val.wc = value;
aVariant.ptr = &aVariant.val;
} else {
aVariant.ptr = nsnull;
}
aVariant.SetPtrIsData();
} else { // 'array'
NS_STATIC_CAST(PRUnichar*, aVariant.val.p)[aIndex] = value;
}
}
break;
}
case nsXPTType::T_CHAR_STR:
case nsXPTType::T_WCHAR_STR:
{
LOG(("String\n"));
jstring data = nsnull;
if (!aIsOut && !aIsArrayElement) { // 'in'
data = (jstring) aParam;
} else if (aParam) { // 'inout' & 'array'
data = (jstring) env->GetObjectArrayElement((jobjectArray) aParam,
aIndex);
}
void* buf = nsnull;
if (data) {
jsize uniLength = env->GetStringLength(data);
if (uniLength > 0) {
if (aType == nsXPTType::T_CHAR_STR) {
jsize utf8Length = env->GetStringUTFLength(data);
buf = nsMemory::Alloc((utf8Length + 1) * sizeof(char));
if (!buf) {
rv = NS_ERROR_OUT_OF_MEMORY;
break;
}
char* char_str = NS_STATIC_CAST(char*, buf);
env->GetStringUTFRegion(data, 0, uniLength, char_str);
char_str[utf8Length] = '\0';
} else { // if T_WCHAR_STR
buf = nsMemory::Alloc((uniLength + 1) * sizeof(jchar));
if (!buf) {
rv = NS_ERROR_OUT_OF_MEMORY;
break;
}
jchar* jchar_str = NS_STATIC_CAST(jchar*, buf);
env->GetStringRegion(data, 0, uniLength, jchar_str);
jchar_str[uniLength] = '\0';
}
} else {
// create empty string
buf = nsMemory::Alloc(2);
if (!buf) {
rv = NS_ERROR_OUT_OF_MEMORY;
break;
}
((jchar*)buf)[0] = '\0';
}
}
if (!aIsArrayElement) { // 'in' & 'inout'
aVariant.val.p = buf;
if (aIsOut) { // 'inout'
aVariant.ptr = &aVariant.val;
aVariant.SetPtrIsData();
}
} else { // 'array'
if (aType == nsXPTType::T_CHAR_STR) {
char* str = NS_STATIC_CAST(char*, buf);
NS_STATIC_CAST(char**, aVariant.val.p)[aIndex] = str;
} else {
PRUnichar* str = NS_STATIC_CAST(PRUnichar*, buf);
NS_STATIC_CAST(PRUnichar**, aVariant.val.p)[aIndex] = str;
}
}
break;
}
case nsXPTType::T_IID:
{
LOG(("String(IID)\n"));
jstring data = nsnull;
if (!aIsOut && !aIsArrayElement) { // 'in'
data = (jstring) aParam;
} else if (aParam) { // 'inout' & 'array'
data = (jstring) env->GetObjectArrayElement((jobjectArray) aParam,
aIndex);
}
nsID* iid = new nsID;
if (!iid) {
rv = NS_ERROR_OUT_OF_MEMORY;
break;
}
if (data) {
// extract IID string from Java string
const char* str = env->GetStringUTFChars(data, nsnull);
if (!str) {
rv = NS_ERROR_OUT_OF_MEMORY;
break;
}
// parse string into IID object
iid->Parse(str);
env->ReleaseStringUTFChars(data, str);
} else {
*iid = nullID;
}
if (!aIsArrayElement) { // 'in' & 'inout'
aVariant.val.p = iid;
if (aIsOut) { // 'inout'
aVariant.ptr = &aVariant.val;
aVariant.SetPtrIsData();
}
} else { // 'array'
NS_STATIC_CAST(nsID**, aVariant.val.p)[aIndex] = iid;
}
break;
}
case nsXPTType::T_INTERFACE:
case nsXPTType::T_INTERFACE_IS:
{
LOG(("nsISupports\n"));
jobject java_obj = nsnull;
if (!aIsOut && !aIsArrayElement) { // 'in'
java_obj = (jobject) aParam;
} else if (aParam) { // 'inout' & 'array'
java_obj = (jobject) env->GetObjectArrayElement((jobjectArray) aParam,
aIndex);
}
nsISupports* xpcom_obj;
if (java_obj) {
// If the requested interface is nsIWeakReference, then we look for or
// create a stub for the nsISupports interface. Then we create a weak
// reference from that stub.
PRBool isWeakRef;
nsID iid;
if (aIID.Equals(NS_GET_IID(nsIWeakReference))) {
isWeakRef = PR_TRUE;
iid = NS_GET_IID(nsISupports);
} else {
isWeakRef = PR_FALSE;
iid = aIID;
}
PRBool isXPTCStub;
rv = GetNewOrUsedXPCOMObject(env, java_obj, iid, &xpcom_obj,
&isXPTCStub);
if (NS_FAILED(rv))
break;
// If the function expects a weak reference, then we need to
// create it here.
if (isWeakRef) {
if (isXPTCStub) {
nsJavaXPTCStub* stub = NS_STATIC_CAST(nsJavaXPTCStub*,
NS_STATIC_CAST(nsXPTCStubBase*,
xpcom_obj));
nsJavaXPTCStubWeakRef* weakref;
weakref = new nsJavaXPTCStubWeakRef(java_obj, stub);
if (!weakref) {
rv = NS_ERROR_OUT_OF_MEMORY;
break;
}
NS_RELEASE(xpcom_obj);
xpcom_obj = weakref;
NS_ADDREF(xpcom_obj);
} else { // if is native XPCOM object
nsCOMPtr<nsISupportsWeakReference> supportsweak =
do_QueryInterface(xpcom_obj);
if (supportsweak) {
nsWeakPtr weakref;
supportsweak->GetWeakReference(getter_AddRefs(weakref));
NS_RELEASE(xpcom_obj);
xpcom_obj = weakref;
NS_ADDREF(xpcom_obj);
} else {
xpcom_obj = nsnull;
}
}
}
} else {
xpcom_obj = nsnull;
}
if (!aIsArrayElement) { // 'in' & 'inout'
aVariant.val.p = xpcom_obj;
aVariant.SetValIsInterface();
if (aIsOut) { // 'inout'
aVariant.ptr = &aVariant.val;
aVariant.SetPtrIsData();
}
} else { // 'array'
NS_STATIC_CAST(nsISupports**, aVariant.val.p)[aIndex] = xpcom_obj;
}
break;
}
case nsXPTType::T_ASTRING:
case nsXPTType::T_DOMSTRING:
{
LOG(("String\n"));
jstring data = nsnull;
if (!aIsOut && !aIsArrayElement) { // 'in'
data = (jstring) aParam;
} else if (aParam) { // 'inout' & 'array'
data = (jstring) env->GetObjectArrayElement((jobjectArray) aParam,
aIndex);
}
nsAString* str;
if (data) {
str = jstring_to_nsAString(env, data);
if (!str) {
rv = NS_ERROR_OUT_OF_MEMORY;
break;
}
} else {
str = nsnull;
}
if (!aIsArrayElement) { // 'in' & 'inout'
aVariant.val.p = str;
aVariant.SetValIsDOMString();
if (aIsOut) { // 'inout'
aVariant.ptr = &aVariant.val;
aVariant.SetPtrIsData();
}
} else { // 'array'
NS_STATIC_CAST(nsAString**, aVariant.val.p)[aIndex] = str;
}
break;
}
case nsXPTType::T_UTF8STRING:
case nsXPTType::T_CSTRING:
{
LOG(("StringUTF\n"));
jstring data = nsnull;
if (!aIsOut && !aIsArrayElement) { // 'in'
data = (jstring) aParam;
} else if (aParam) { // 'inout' & 'array'
data = (jstring) env->GetObjectArrayElement((jobjectArray) aParam,
aIndex);
}
nsACString* str;
if (data) {
str = jstring_to_nsACString(env, data);
if (!str) {
rv = NS_ERROR_OUT_OF_MEMORY;
break;
}
} else {
str = nsnull;
}
if (!aIsArrayElement) { // 'in' & 'inout'
aVariant.val.p = str;
if (aType == nsXPTType::T_CSTRING) {
aVariant.SetValIsCString();
} else {
aVariant.SetValIsUTF8String();
}
if (aIsOut) { // 'inout'
aVariant.ptr = &aVariant.val;
aVariant.SetPtrIsData();
}
} else { // 'array'
NS_STATIC_CAST(nsACString**, aVariant.val.p)[aIndex] = str;
}
break;
}
// handle "void *" as an "int" in Java
case nsXPTType::T_VOID:
{
LOG(("int (void*)\n"));
if (!aIsOut && !aIsArrayElement) { // 'in'
aVariant.val.p = (void*) env->CallIntMethod(aParam, intValueMID);
} else { // 'inout' & 'array'
jint value;
if (aParam) {
env->GetIntArrayRegion((jintArray) aParam, aIndex, 1, &value);
}
if (aIsOut) { // 'inout'
if (aParam) {
aVariant.val.p = NS_REINTERPRET_CAST(void*, value);
aVariant.ptr = &aVariant.val;
} else {
aVariant.ptr = nsnull;
}
aVariant.SetPtrIsData();
} else { // 'array'
NS_STATIC_CAST(PRUint32*, aVariant.val.p)[aIndex] = value;
}
}
break;
}
case nsXPTType::T_ARRAY:
{
jobject sourceArray = nsnull;
if (!aIsOut) { // 'in'
sourceArray = aParam;
} else if (aParam) { // 'inout'
jobjectArray array = NS_STATIC_CAST(jobjectArray, aParam);
sourceArray = env->GetObjectArrayElement(array, 0);
}
if (sourceArray) {
rv = CreateNativeArray(aArrayType, aArraySize, &aVariant.val.p);
for (PRUint32 i = 0; i < aArraySize && NS_SUCCEEDED(rv); i++) {
rv = SetupParams(env, sourceArray, aArrayType, PR_FALSE, aIID, 0, 0,
PR_TRUE, i, aVariant);
}
}
if (aIsOut) { // 'inout'
aVariant.ptr = &aVariant.val.p;
aVariant.SetPtrIsData();
}
break;
}
default:
NS_WARNING("unexpected parameter type");
return NS_ERROR_UNEXPECTED;
}
return rv;
}
/**
* Does any cleanup from objects created in SetupParams, as well as converting
* any out params to Java.
*
* NOTE: If aInvokeResult is an error condition, then we just do cleanup in
* this function.
*/
nsresult
FinalizeParams(JNIEnv *env, const nsXPTParamInfo &aParamInfo, PRUint8 aType,
nsXPTCVariant &aVariant, const nsID& aIID,
PRBool aIsArrayElement, PRUint8 aArrayType, PRUint32 aArraySize,
PRUint32 aIndex, nsresult aInvokeResult, jobject* aParam)
{
nsresult rv = NS_OK;
switch (aType)
{
case nsXPTType::T_I8:
{
if (NS_SUCCEEDED(aInvokeResult)) {
jbyte value = aVariant.val.i8;
if (aParamInfo.IsRetval() && !aIsArrayElement) {
*aParam = env->NewObject(byteClass, byteInitMID, value);
} else if ((aParamInfo.IsOut() || aIsArrayElement) && *aParam) {
env->SetByteArrayRegion((jbyteArray) *aParam, aIndex, 1, &value);
}
}
break;
}
case nsXPTType::T_I16:
case nsXPTType::T_U8:
{
if (NS_SUCCEEDED(aInvokeResult)) {
jshort value = (aType == nsXPTType::T_I16) ? aVariant.val.i16 :
aVariant.val.u8;
if (aParamInfo.IsRetval() && !aIsArrayElement) {
*aParam = env->NewObject(shortClass, shortInitMID, value);
} else if ((aParamInfo.IsOut() || aIsArrayElement) && aParam) {
env->SetShortArrayRegion((jshortArray) *aParam, aIndex, 1, &value);
}
}
break;
}
case nsXPTType::T_I32:
case nsXPTType::T_U16:
{
if (NS_SUCCEEDED(aInvokeResult)) {
jint value = (aType == nsXPTType::T_I32) ? aVariant.val.i32 :
aVariant.val.u16;
if (aParamInfo.IsRetval() && !aIsArrayElement) {
*aParam = env->NewObject(intClass, intInitMID, value);
} else if ((aParamInfo.IsOut() || aIsArrayElement) && *aParam) {
env->SetIntArrayRegion((jintArray) *aParam, aIndex, 1, &value);
}
}
break;
}
case nsXPTType::T_I64:
case nsXPTType::T_U32:
{
if (NS_SUCCEEDED(aInvokeResult)) {
jlong value = (aType == nsXPTType::T_I64) ? aVariant.val.i64 :
aVariant.val.u32;
if (aParamInfo.IsRetval() && !aIsArrayElement) {
*aParam = env->NewObject(longClass, longInitMID, value);
} else if ((aParamInfo.IsOut() || aIsArrayElement) && *aParam) {
env->SetLongArrayRegion((jlongArray) *aParam, aIndex, 1, &value);
}
}
break;
}
case nsXPTType::T_FLOAT:
{
if (NS_SUCCEEDED(aInvokeResult)) {
jfloat value = aVariant.val.f;
if (aParamInfo.IsRetval() && !aIsArrayElement) {
*aParam = env->NewObject(floatClass, floatInitMID, value);
} else if ((aParamInfo.IsOut() || aIsArrayElement) && *aParam) {
env->SetFloatArrayRegion((jfloatArray) *aParam, aIndex, 1, &value);
}
}
break;
}
// XXX how do we handle unsigned 64-bit values?
case nsXPTType::T_U64:
case nsXPTType::T_DOUBLE:
{
if (NS_SUCCEEDED(aInvokeResult)) {
jdouble value = (aType == nsXPTType::T_DOUBLE) ? aVariant.val.d :
aVariant.val.u64;
if (aParamInfo.IsRetval() && !aIsArrayElement) {
*aParam = env->NewObject(doubleClass, doubleInitMID, value);
} else if ((aParamInfo.IsOut() || aIsArrayElement) && *aParam) {
env->SetDoubleArrayRegion((jdoubleArray) *aParam, aIndex, 1, &value);
}
}
break;
}
case nsXPTType::T_BOOL:
{
if (NS_SUCCEEDED(aInvokeResult)) {
jboolean value = aVariant.val.b;
if (aParamInfo.IsRetval() && !aIsArrayElement) {
*aParam = env->NewObject(booleanClass, booleanInitMID, value);
} else if ((aParamInfo.IsOut() || aIsArrayElement) && *aParam) {
env->SetBooleanArrayRegion((jbooleanArray) *aParam, aIndex, 1, &value);
}
}
break;
}
case nsXPTType::T_CHAR:
case nsXPTType::T_WCHAR:
{
if (NS_SUCCEEDED(aInvokeResult)) {
jchar value;
if (aType == nsXPTType::T_CHAR)
value = aVariant.val.c;
else
value = aVariant.val.wc;
if (aParamInfo.IsRetval() && !aIsArrayElement) {
*aParam = env->NewObject(charClass, charInitMID, value);
} else if ((aParamInfo.IsOut() || aIsArrayElement) && *aParam) {
env->SetCharArrayRegion((jcharArray) *aParam, aIndex, 1, &value);
}
}
break;
}
case nsXPTType::T_CHAR_STR:
case nsXPTType::T_WCHAR_STR:
{
if ((aParamInfo.IsOut() || aIsArrayElement) &&
NS_SUCCEEDED(aInvokeResult))
{
// create new string from data
jstring str = nsnull;
if (aVariant.val.p) {
if (aType == nsXPTType::T_CHAR_STR) {
str = env->NewStringUTF((const char*) aVariant.val.p);
} else {
PRUint32 length = nsCRT::strlen((const PRUnichar*) aVariant.val.p);
str = env->NewString((const jchar*) aVariant.val.p, length);
}
if (!str) {
rv = NS_ERROR_OUT_OF_MEMORY;
break;
}
}
if (aParamInfo.IsRetval() && !aIsArrayElement) {
*aParam = str;
} else if (*aParam) {
// put new string into output array
env->SetObjectArrayElement((jobjectArray) *aParam, aIndex, str);
}
}
// cleanup
if (aVariant.val.p)
nsMemory::Free(aVariant.val.p);
break;
}
case nsXPTType::T_IID:
{
nsID* iid = NS_STATIC_CAST(nsID*, aVariant.val.p);
if ((aParamInfo.IsOut() || aIsArrayElement) &&
NS_SUCCEEDED(aInvokeResult))
{
// Create the string from nsID
jstring str = nsnull;
if (iid) {
char* iid_str = iid->ToString();
if (iid_str) {
str = env->NewStringUTF(iid_str);
}
if (!iid_str || !str) {
rv = NS_ERROR_OUT_OF_MEMORY;
break;
}
PR_Free(iid_str);
}
if (aParamInfo.IsRetval() && !aIsArrayElement) {
*aParam = str;
} else if (*aParam) {
// put new string into output array
env->SetObjectArrayElement((jobjectArray) *aParam, aIndex, str);
}
}
// Ordinarily, we would delete 'iid' here. But we cannot do that until
// we've handled all of the params. See comment in CallXPCOMMethod.
// We can safely delete array elements, though.
if (aIsArrayElement)
delete iid;
break;
}
case nsXPTType::T_INTERFACE:
case nsXPTType::T_INTERFACE_IS:
{
nsISupports* xpcom_obj = NS_STATIC_CAST(nsISupports*, aVariant.val.p);
if ((aParamInfo.IsOut() || aIsArrayElement) &&
NS_SUCCEEDED(aInvokeResult))
{
jobject java_obj = nsnull;
if (xpcom_obj) {
// Get matching Java object for given xpcom object
rv = GetNewOrUsedJavaObject(env, xpcom_obj, aIID, &java_obj);
if (NS_FAILED(rv))
break;
}
if (aParamInfo.IsRetval() && !aIsArrayElement) {
*aParam = java_obj;
} else if (*aParam) {
// put new Java object into output array
env->SetObjectArrayElement((jobjectArray) *aParam, aIndex, java_obj);
}
}
// cleanup
NS_IF_RELEASE(xpcom_obj);
break;
}
case nsXPTType::T_ASTRING:
case nsXPTType::T_DOMSTRING:
{
nsString* str = NS_STATIC_CAST(nsString*, aVariant.val.p);
if ((aParamInfo.IsOut() || aParamInfo.IsDipper() || aIsArrayElement) &&
NS_SUCCEEDED(aInvokeResult))
{
// Create Java string from returned nsString
jstring jstr = nsnull;
if (str) {
jstr = env->NewString((const jchar*) str->get(), str->Length());
if (!jstr) {
rv = NS_ERROR_OUT_OF_MEMORY;
break;
}
}
if (aParamInfo.IsRetval() && !aIsArrayElement) {
*aParam = jstr;
} else if (*aParam) {
// put new Java string into output array
env->SetObjectArrayElement((jobjectArray) *aParam, aIndex, jstr);
}
}
// cleanup
if (str) {
delete str;
}
break;
}
case nsXPTType::T_UTF8STRING:
case nsXPTType::T_CSTRING:
{
nsCString* str = NS_STATIC_CAST(nsCString*, aVariant.val.p);
if ((aParamInfo.IsOut() || aParamInfo.IsDipper() || aIsArrayElement) &&
NS_SUCCEEDED(aInvokeResult))
{
// Create Java string from returned nsString
jstring jstr = nsnull;
if (str) {
jstr = env->NewStringUTF((const char*) str->get());
if (!jstr) {
rv = NS_ERROR_OUT_OF_MEMORY;
break;
}
}
if (aParamInfo.IsRetval() && !aIsArrayElement) {
*aParam = jstr;
} else if (*aParam) {
// put new Java string into output array
env->SetObjectArrayElement((jobjectArray) *aParam, aIndex, jstr);
}
}
// cleanup
if (str) {
delete str;
}
break;
}
case nsXPTType::T_VOID:
{
if (NS_SUCCEEDED(aInvokeResult)) {
jint value = NS_REINTERPRET_CAST(jint, aVariant.val.p);
if (aParamInfo.IsRetval() && !aIsArrayElement) {
*aParam = env->NewObject(intClass, intInitMID, value);
} else if ((aParamInfo.IsOut() || aIsArrayElement) && *aParam) {
env->SetIntArrayRegion((jintArray) *aParam, aIndex, 1, &value);
}
}
break;
}
case nsXPTType::T_ARRAY:
{
if (aParamInfo.IsOut() && NS_SUCCEEDED(aInvokeResult)) {
// Create Java array from returned native array
jobject jarray = nsnull;
if (aVariant.val.p) {
rv = CreateJavaArray(env, aArrayType, aArraySize, aIID, &jarray);
if (NS_FAILED(rv))
break;
nsXPTCVariant var;
for (PRUint32 i = 0; i < aArraySize && NS_SUCCEEDED(rv); i++) {
rv = GetNativeArrayElement(aArrayType, aVariant.val.p, i, &var);
if (NS_SUCCEEDED(rv)) {
rv = FinalizeParams(env, aParamInfo, aArrayType, var, aIID,
PR_TRUE, 0, 0, i, aInvokeResult, &jarray);
}
}
}
if (aParamInfo.IsRetval()) {
*aParam = jarray;
} else if (*aParam) {
// put new Java array into output array
env->SetObjectArrayElement((jobjectArray) *aParam, 0, jarray);
}
}
// cleanup
// If this is not an out param or if the invokeResult is a failure case,
// then the array elements have not been cleaned up. Do so now.
if (!aParamInfo.IsOut() || NS_FAILED(aInvokeResult)) {
nsXPTCVariant var;
for (PRUint32 i = 0; i < aArraySize; i++) {
rv = GetNativeArrayElement(aArrayType, aVariant.val.p, i, &var);
if (NS_SUCCEEDED(rv)) {
FinalizeParams(env, aParamInfo, aArrayType, var, aIID, PR_TRUE,
0, 0, i, NS_ERROR_FAILURE, nsnull);
}
}
}
PR_Free(aVariant.val.p);
break;
}
default:
NS_WARNING("unexpected parameter type");
return NS_ERROR_UNEXPECTED;
}
// Check for Java exception, but don't overwrite pre-existing error code.
if (NS_SUCCEEDED(rv) && env->ExceptionCheck())
rv = NS_ERROR_FAILURE;
return rv;
}
/**
* Given an interface info struct and a method name, returns the method info
* and index, if that method exists.
*
* Most method names are lower case. Unfortunately, the method names of some
* interfaces (such as nsIAppShell) start with a capital letter. This function
* will try all of the permutations.
*/
nsresult
QueryMethodInfo(nsIInterfaceInfo* aIInfo, const char* aMethodName,
PRUint16* aMethodIndex, const nsXPTMethodInfo** aMethodInfo)
{
// The common case is that the method name is lower case, so we check
// that first.
nsresult rv;
rv = aIInfo->GetMethodInfoForName(aMethodName, aMethodIndex, aMethodInfo);
if (NS_SUCCEEDED(rv))
return rv;
// If there is no method called <aMethodName>, then maybe it is an
// 'attribute'. An 'attribute' will start with "get" or "set". But first,
// we check the length, in order to skip over method names that match exactly
// "get" or "set".
if (strlen(aMethodName) > 3) {
if (strncmp("get", aMethodName, 3) == 0) {
char* getterName = strdup(aMethodName + 3);
getterName[0] = tolower(getterName[0]);
rv = aIInfo->GetMethodInfoForName(getterName, aMethodIndex, aMethodInfo);
free(getterName);
} else if (strncmp("set", aMethodName, 3) == 0) {
char* setterName = strdup(aMethodName + 3);
setterName[0] = tolower(setterName[0]);
rv = aIInfo->GetMethodInfoForName(setterName, aMethodIndex, aMethodInfo);
if (NS_SUCCEEDED(rv)) {
// If this succeeded, GetMethodInfoForName will have returned the
// method info for the 'getter'. We want the 'setter', so increase
// method index by one ('setter' immediately follows the 'getter'),
// and get its method info.
(*aMethodIndex)++;
rv = aIInfo->GetMethodInfo(*aMethodIndex, aMethodInfo);
if (NS_SUCCEEDED(rv)) {
// Double check that this methodInfo matches the given method.
if (!(*aMethodInfo)->IsSetter() ||
strcmp(setterName, (*aMethodInfo)->name) != 0) {
rv = NS_ERROR_FAILURE;
}
}
}
free(setterName);
}
}
if (NS_SUCCEEDED(rv))
return rv;
// If we get here, then maybe the method name is capitalized.
char* methodName = strdup(aMethodName);
methodName[0] = toupper(methodName[0]);
rv = aIInfo->GetMethodInfoForName(methodName, aMethodIndex, aMethodInfo);
free(methodName);
if (NS_SUCCEEDED(rv))
return rv;
// If there is no method called <aMethodName>, then maybe it is an
// 'attribute'.
if (strlen(aMethodName) > 3) {
if (strncmp("get", aMethodName, 3) == 0) {
char* getterName = strdup(aMethodName + 3);
rv = aIInfo->GetMethodInfoForName(getterName, aMethodIndex, aMethodInfo);
free(getterName);
} else if (strncmp("set", aMethodName, 3) == 0) {
char* setterName = strdup(aMethodName + 3);
rv = aIInfo->GetMethodInfoForName(setterName, aMethodIndex, aMethodInfo);
if (NS_SUCCEEDED(rv)) {
// If this succeeded, GetMethodInfoForName will have returned the
// method info for the 'getter'. We want the 'setter', so increase
// method index by one ('setter' immediately follows the 'getter'),
// and get its method info.
(*aMethodIndex)++;
rv = aIInfo->GetMethodInfo(*aMethodIndex, aMethodInfo);
if (NS_SUCCEEDED(rv)) {
// Double check that this methodInfo matches the given method.
if (!(*aMethodInfo)->IsSetter() ||
strcmp(setterName, (*aMethodInfo)->name) != 0) {
rv = NS_ERROR_FAILURE;
}
}
}
free(setterName);
}
}
return rv;
}
/**
* org.mozilla.xpcom.XPCOMJavaProxy.callXPCOMMethod
*/
extern "C" JX_EXPORT jobject JNICALL
JAVAPROXY_NATIVE(callXPCOMMethod) (JNIEnv *env, jclass that, jobject aJavaProxy,
jstring aMethodName, jobjectArray aParams)
{
nsresult rv;
// Get native XPCOM instance
void* xpcom_obj;
rv = GetXPCOMInstFromProxy(env, aJavaProxy, &xpcom_obj);
if (NS_FAILED(rv)) {
ThrowException(env, 0, "Failed to get matching XPCOM object");
return nsnull;
}
JavaXPCOMInstance* inst = NS_STATIC_CAST(JavaXPCOMInstance*, xpcom_obj);
// Get method info
PRUint16 methodIndex;
const nsXPTMethodInfo* methodInfo;
nsIInterfaceInfo* iinfo = inst->InterfaceInfo();
const char* methodName = env->GetStringUTFChars(aMethodName, nsnull);
rv = QueryMethodInfo(iinfo, methodName, &methodIndex, &methodInfo);
env->ReleaseStringUTFChars(aMethodName, methodName);
if (NS_FAILED(rv)) {
ThrowException(env, rv, "GetMethodInfoForName failed");
return nsnull;
}
#ifdef DEBUG_JAVAXPCOM
const char* ifaceName;
iinfo->GetNameShared(&ifaceName);
LOG(("===> (XPCOM) %s::%s()\n", ifaceName, methodInfo->GetName()));
#endif
// Convert the Java params
PRUint8 paramCount = methodInfo->GetParamCount();
nsXPTCVariant* params = nsnull;
if (paramCount)
{
params = new nsXPTCVariant[paramCount];
if (!params) {
ThrowException(env, NS_ERROR_OUT_OF_MEMORY, "Can't create params array");
return nsnull;
}
memset(params, 0, paramCount * sizeof(nsXPTCVariant));
for (PRUint8 i = 0; i < paramCount && NS_SUCCEEDED(rv); i++)
{
LOG(("\t Param %d: ", i));
const nsXPTParamInfo &paramInfo = methodInfo->GetParam(i);
params[i].type = paramInfo.GetType();
if (paramInfo.IsIn() && !paramInfo.IsDipper()) {
PRUint8 type = params[i].type.TagPart();
// is paramater an array?
PRUint8 arrayType = 0;
PRUint32 arraySize = 0;
if (type == nsXPTType::T_ARRAY) {
// get array type
nsXPTType xpttype;
rv = iinfo->GetTypeForParam(methodIndex, &paramInfo, 1, &xpttype);
if (NS_FAILED(rv))
break;
arrayType = xpttype.TagPart();
// get size of array
PRUint8 argnum;
rv = iinfo->GetSizeIsArgNumberForParam(methodIndex, &paramInfo, 0,
&argnum);
if (NS_FAILED(rv))
break;
arraySize = params[argnum].val.u32;
}
// get IID for interface params
nsID iid;
if (type == nsXPTType::T_INTERFACE ||
type == nsXPTType::T_INTERFACE_IS ||
type == nsXPTType::T_ARRAY &&
(arrayType == nsXPTType::T_INTERFACE ||
arrayType == nsXPTType::T_INTERFACE_IS))
{
PRUint8 paramType = type == nsXPTType::T_ARRAY ? arrayType : type;
rv = GetIIDForMethodParam(iinfo, methodInfo, paramInfo, paramType,
methodIndex, params, PR_TRUE, iid);
}
if (NS_SUCCEEDED(rv)) {
rv = SetupParams(env, env->GetObjectArrayElement(aParams, i), type,
paramInfo.IsOut(), iid, arrayType, arraySize,
PR_FALSE, 0, params[i]);
}
} else if (paramInfo.IsDipper()) {
LOG(("dipper\n"));
switch (params[i].type.TagPart())
{
case nsXPTType::T_ASTRING:
case nsXPTType::T_DOMSTRING:
{
params[i].val.p = new nsString();
if (params[i].val.p == nsnull) {
rv = NS_ERROR_OUT_OF_MEMORY;
break;
}
params[i].SetValIsDOMString();
break;
}
case nsXPTType::T_UTF8STRING:
case nsXPTType::T_CSTRING:
{
params[i].val.p = new nsCString();
if (params[i].val.p == nsnull) {
rv = NS_ERROR_OUT_OF_MEMORY;
break;
}
params[i].SetValIsCString();
break;
}
default:
LOG(("unhandled dipper type\n"));
rv = NS_ERROR_UNEXPECTED;
}
} else {
LOG(("out/retval\n"));
params[i].ptr = &(params[i].val);
params[i].SetPtrIsData();
}
}
if (NS_FAILED(rv)) {
ThrowException(env, rv, "SetupParams failed");
return nsnull;
}
}
// Call the XPCOM method
nsresult invokeResult;
invokeResult = XPTC_InvokeByIndex(inst->GetInstance(), methodIndex,
paramCount, params);
// Clean up params
jobject result = nsnull;
for (PRUint8 i = 0; i < paramCount && NS_SUCCEEDED(rv); i++)
{
const nsXPTParamInfo &paramInfo = methodInfo->GetParam(i);
PRUint8 type = paramInfo.GetType().TagPart();
// is paramater an array?
PRUint8 arrayType = 0;
PRUint32 arraySize = 0;
if (type == nsXPTType::T_ARRAY) {
// get array type
nsXPTType array_xpttype;
rv = iinfo->GetTypeForParam(methodIndex, &paramInfo, 1, &array_xpttype);
if (NS_FAILED(rv))
break;
arrayType = array_xpttype.TagPart();
// get size of array
PRUint8 argnum;
rv = iinfo->GetSizeIsArgNumberForParam(methodIndex, &paramInfo, 0,
&argnum);
if (NS_FAILED(rv))
break;
arraySize = params[argnum].val.u32;
}
// get IID for interface params
nsID iid;
if (type == nsXPTType::T_INTERFACE || type == nsXPTType::T_INTERFACE_IS ||
type == nsXPTType::T_ARRAY && (arrayType == nsXPTType::T_INTERFACE ||
arrayType == nsXPTType::T_INTERFACE_IS))
{
PRUint8 paramType = type == nsXPTType::T_ARRAY ? arrayType : type;
rv = GetIIDForMethodParam(iinfo, methodInfo, paramInfo, paramType,
methodIndex, params, PR_TRUE, iid);
if (NS_FAILED(rv))
break;
}
jobject* javaElement;
if (!paramInfo.IsRetval()) {
jobject element = env->GetObjectArrayElement(aParams, i);
javaElement = &element;
} else {
javaElement = &result;
}
rv = FinalizeParams(env, paramInfo, type, params[i], iid, PR_FALSE,
arrayType, arraySize, 0, invokeResult, javaElement);
}
if (NS_FAILED(rv)) {
ThrowException(env, rv, "FinalizeParams failed");
return nsnull;
}
// Normally, we would delete any created nsID object in the above loop.
// However, GetIIDForMethodParam may need some of the nsID params when it's
// looking for the IID of an INTERFACE_IS. Therefore, we can't delete it
// until we've gone through the 'Finalize' loop once and created the result.
for (PRUint8 j = 0; j < paramCount && NS_SUCCEEDED(rv); j++)
{
const nsXPTParamInfo &paramInfo = methodInfo->GetParam(j);
const nsXPTType &type = paramInfo.GetType();
if (type.TagPart() == nsXPTType::T_IID) {
nsID* iid = (nsID*) params[j].val.p;
delete iid;
}
}
if (params) {
delete params;
}
// If the XPCOM method invocation failed, we don't immediately throw an
// exception and return so that we can clean up any parameters.
if (NS_FAILED(invokeResult)) {
nsCAutoString message("The function \"");
message.AppendASCII(methodInfo->GetName());
message.AppendLiteral("\" returned an error condition");
ThrowException(env, invokeResult, message.get());
}
LOG(("<=== (XPCOM) %s::%s()\n", ifaceName, methodInfo->GetName()));
return result;
}
nsresult
CreateJavaProxy(JNIEnv* env, nsISupports* aXPCOMObject, const nsIID& aIID,
jobject* aResult)
{
NS_PRECONDITION(aResult != nsnull, "null ptr");
if (!aResult)
return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIInterfaceInfoManager> iim =
getter_AddRefs(XPTI_GetInterfaceInfoManager());
NS_ASSERTION(iim != nsnull, "Failed to get InterfaceInfoManager");
if (!iim)
return NS_ERROR_FAILURE;
// Get interface info for class
nsCOMPtr<nsIInterfaceInfo> info;
nsresult rv = iim->GetInfoForIID(&aIID, getter_AddRefs(info));
if (NS_FAILED(rv))
return rv;
// Wrap XPCOM object (addrefs aXPCOMObject)
JavaXPCOMInstance* inst = new JavaXPCOMInstance(aXPCOMObject, info);
if (!inst)
return NS_ERROR_OUT_OF_MEMORY;
// Get interface name
const char* iface_name;
rv = info->GetNameShared(&iface_name);
if (NS_SUCCEEDED(rv)) {
jobject java_obj = nsnull;
// Create proper Java interface name
nsCAutoString class_name("org/mozilla/xpcom/");
class_name.AppendASCII(iface_name);
jclass ifaceClass = env->FindClass(class_name.get());
if (ifaceClass) {
java_obj = env->CallStaticObjectMethod(xpcomJavaProxyClass,
createProxyMID, ifaceClass,
NS_REINTERPRET_CAST(jlong, inst));
if (env->ExceptionCheck())
java_obj = nsnull;
}
if (java_obj) {
#ifdef DEBUG_JAVAXPCOM
char* iid_str = aIID.ToString();
LOG(("+ CreateJavaProxy (Java=%08x | XPCOM=%08x | IID=%s)\n",
(PRUint32) env->CallIntMethod(java_obj, hashCodeMID),
(PRUint32) aXPCOMObject, iid_str));
PR_Free(iid_str);
#endif
// Associate XPCOM object with Java proxy
rv = gNativeToJavaProxyMap->Add(env, aXPCOMObject, aIID, java_obj);
if (NS_SUCCEEDED(rv)) {
*aResult = java_obj;
return NS_OK;
}
} else {
rv = NS_ERROR_FAILURE;
}
}
// If there was an error, clean up.
delete inst;
return rv;
}
nsresult
GetXPCOMInstFromProxy(JNIEnv* env, jobject aJavaObject, void** aResult)
{
NS_PRECONDITION(aResult != nsnull, "null ptr");
if (!aResult)
return NS_ERROR_NULL_POINTER;
long xpcom_obj = env->CallStaticLongMethod(xpcomJavaProxyClass,
getNativeXPCOMInstMID, aJavaObject);
if (!xpcom_obj || env->ExceptionCheck()) {
return NS_ERROR_FAILURE;
}
*aResult = NS_REINTERPRET_CAST(void*, xpcom_obj);
#ifdef DEBUG_JAVAXPCOM
JavaXPCOMInstance* inst = NS_STATIC_CAST(JavaXPCOMInstance*, *aResult);
nsIID* iid;
inst->InterfaceInfo()->GetInterfaceIID(&iid);
char* iid_str = iid->ToString();
LOG(("< GetXPCOMInstFromProxy (Java=%08x | XPCOM=%08x | IID=%s)\n",
(PRUint32) env->CallIntMethod(aJavaObject, hashCodeMID),
(PRUint32) inst->GetInstance(), iid_str));
PR_Free(iid_str);
nsMemory::Free(iid);
#endif
return NS_OK;
}
/**
* org.mozilla.xpcom.XPCOMJavaProxy.finalizeProxy
*/
extern "C" JX_EXPORT void JNICALL
JAVAPROXY_NATIVE(finalizeProxy) (JNIEnv *env, jclass that, jobject aJavaProxy)
{
#ifdef DEBUG_JAVAXPCOM
PRUint32 xpcom_addr = 0;
#endif
// Due to Java's garbage collection, this finalize statement may get called
// after FreeJavaGlobals(). So check to make sure that everything is still
// initialized.
if (gJavaXPCOMLock) {
nsAutoLock lock(gJavaXPCOMLock);
// If may be possible for the lock to be acquired here when FreeGlobals is
// in the middle of running. If so, then this thread will sleep until
// FreeGlobals releases its lock. At that point, we resume this thread
// here, but JavaXPCOM may no longer be initialized. So we need to check
// that everything is legit after acquiring the lock.
if (gJavaXPCOMInitialized) {
// Get native XPCOM instance
void* xpcom_obj;
nsresult rv = GetXPCOMInstFromProxy(env, aJavaProxy, &xpcom_obj);
if (NS_SUCCEEDED(rv)) {
JavaXPCOMInstance* inst = NS_STATIC_CAST(JavaXPCOMInstance*, xpcom_obj);
#ifdef DEBUG_JAVAXPCOM
xpcom_addr = NS_REINTERPRET_CAST(PRUint32, inst->GetInstance());
#endif
nsIID* iid;
rv = inst->InterfaceInfo()->GetInterfaceIID(&iid);
if (NS_SUCCEEDED(rv)) {
rv = gNativeToJavaProxyMap->Remove(env, inst->GetInstance(), *iid);
nsMemory::Free(iid);
}
NS_ASSERTION(NS_SUCCEEDED(rv), "Failed to RemoveJavaProxy");
delete inst;
}
}
}
#ifdef DEBUG_JAVAXPCOM
LOG(("- Finalize (Java=%08x | XPCOM=%08x)\n",
(PRUint32) env->CallIntMethod(aJavaProxy, hashCodeMID), xpcom_addr));
#endif
}
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