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Diffstat (limited to '')
| -rw-r--r-- | src/libs/xpcom18a4/java/src/nsJavaXPTCStub.cpp | 1711 |
1 files changed, 1711 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/java/src/nsJavaXPTCStub.cpp b/src/libs/xpcom18a4/java/src/nsJavaXPTCStub.cpp new file mode 100644 index 00000000..c8136ec4 --- /dev/null +++ b/src/libs/xpcom18a4/java/src/nsJavaXPTCStub.cpp @@ -0,0 +1,1711 @@ +/* ***** 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 "nsJavaXPTCStub.h" +#include "nsJavaWrapper.h" +#include "nsJavaXPCOMBindingUtils.h" +#include "prmem.h" +#include "nsIInterfaceInfoManager.h" +#include "nsString.h" +#include "nsString.h" +#include "nsCRT.h" +#include "nsServiceManagerUtils.h" + + +nsJavaXPTCStub::nsJavaXPTCStub(jobject aJavaObject, nsIInterfaceInfo *aIInfo, + nsresult *rv) + : mJavaStrongRef(nsnull) + , mIInfo(aIInfo) + , mMaster(nsnull) + , mWeakRefCnt(0) +{ + const nsIID *iid = nsnull; + aIInfo->GetIIDShared(&iid); + NS_ASSERTION(iid, "GetIIDShared must not fail!"); + + *rv = InitStub(*iid); + if (NS_FAILED(*rv)) + return; + + JNIEnv* env = GetJNIEnv(); + jobject weakref = env->NewObject(weakReferenceClass, + weakReferenceConstructorMID, aJavaObject); + mJavaWeakRef = env->NewGlobalRef(weakref); + mJavaRefHashCode = env->CallStaticIntMethod(systemClass, hashCodeMID, + aJavaObject); + +#ifdef DEBUG_JAVAXPCOM + char* iid_str = iid->ToString(); + LOG(("+ nsJavaXPTCStub (Java=%08x | XPCOM=%08x | IID=%s)\n", + (PRUint32) mJavaRefHashCode, (PRUint32) this, iid_str)); + PR_Free(iid_str); +#endif +} + +nsJavaXPTCStub::~nsJavaXPTCStub() +{ +} + +NS_IMETHODIMP_(nsrefcnt) +nsJavaXPTCStub::AddRefInternal() +{ + // If this is the first AddRef call, we create a strong global ref to the + // Java object to keep it from being garbage collected. + if (mRefCnt == 0) { + JNIEnv* env = GetJNIEnv(); + jobject referent = env->CallObjectMethod(mJavaWeakRef, getReferentMID); + if (!env->IsSameObject(referent, NULL)) { + mJavaStrongRef = env->NewGlobalRef(referent); + } + NS_ASSERTION(mJavaStrongRef != nsnull, "Failed to acquire strong ref"); + } + + // if this is the master interface + NS_PRECONDITION(PRInt32(mRefCnt) >= 0, "illegal refcnt"); + NS_ASSERT_OWNINGTHREAD(nsJavaXPTCStub); + ++mRefCnt; + NS_LOG_ADDREF(this, mRefCnt, "nsJavaXPTCStub", sizeof(*this)); + return mRefCnt; +} + +NS_IMETHODIMP_(nsrefcnt) +nsJavaXPTCStub::AddRef() +{ +#ifdef DEBUG_JAVAXPCOM_REFCNT + nsIID* iid; + mIInfo->GetInterfaceIID(&iid); + char* iid_str = iid->ToString(); + int refcnt = PRInt32(mMaster ? mMaster->mRefCnt : mRefCnt) + 1; + LOG(("= nsJavaXPTCStub::AddRef (XPCOM=%08x | refcnt = %d | IID=%s)\n", + (int) this, refcnt, iid_str)); + PR_Free(iid_str); + nsMemory::Free(iid); +#endif + + nsJavaXPTCStub* master = mMaster ? mMaster : this; + return master->AddRefInternal(); +} + +NS_IMETHODIMP_(nsrefcnt) +nsJavaXPTCStub::ReleaseInternal() +{ + NS_PRECONDITION(0 != mRefCnt, "dup release"); + NS_ASSERT_OWNINGTHREAD(nsJavaXPTCStub); + --mRefCnt; + NS_LOG_RELEASE(this, mRefCnt, "nsJavaXPTCStub"); + if (mRefCnt == 0) { + // delete strong ref; allows Java object to be garbage collected + DeleteStrongRef(); + + // If we have a weak ref, we don't delete this object. + if (mWeakRefCnt == 0) { + mRefCnt = 1; /* stabilize */ + Destroy(); + delete this; + } + return 0; + } + return mRefCnt; +} + +NS_IMETHODIMP_(nsrefcnt) +nsJavaXPTCStub::Release() +{ +#ifdef DEBUG_JAVAXPCOM_REFCNT + nsIID* iid; + mIInfo->GetInterfaceIID(&iid); + char* iid_str = iid->ToString(); + int refcnt = PRInt32(mMaster ? mMaster->mRefCnt : mRefCnt) - 1; + LOG(("= nsJavaXPTCStub::Release (XPCOM=%08x | refcnt = %d | IID=%s)\n", + (int) this, refcnt, iid_str)); + PR_Free(iid_str); + nsMemory::Free(iid); +#endif + + nsJavaXPTCStub* master = mMaster ? mMaster : this; + return master->ReleaseInternal(); +} + +void +nsJavaXPTCStub::Destroy() +{ + JNIEnv* env = GetJNIEnv(); + +#ifdef DEBUG_JAVAXPCOM + nsIID* iid; + mIInfo->GetInterfaceIID(&iid); + char* iid_str = iid->ToString(); + LOG(("- nsJavaXPTCStub (Java=%08x | XPCOM=%08x | IID=%s)\n", + (PRUint32) mJavaRefHashCode, (PRUint32) this, iid_str)); + PR_Free(iid_str); + nsMemory::Free(iid); +#endif + + if (!mMaster) { + // delete each child stub + for (PRInt32 i = 0; i < mChildren.Count(); i++) { + delete (nsJavaXPTCStub*) mChildren[i]; + } + + // Since we are destroying this stub, also remove the mapping. + // It is possible for mJavaStrongRef to be NULL here. That is why we + // store the hash code value earlier. + if (gJavaXPCOMInitialized) { + gJavaToXPTCStubMap->Remove(mJavaRefHashCode); + } + } + + env->CallVoidMethod(mJavaWeakRef, clearReferentMID); + env->DeleteGlobalRef(mJavaWeakRef); +} + +void +nsJavaXPTCStub::ReleaseWeakRef() +{ + // if this is a child + if (mMaster) + mMaster->ReleaseWeakRef(); + + --mWeakRefCnt; + + // If there are no more associated weak refs, and no one else holds a strong + // ref to this object, then delete it. + if (mWeakRefCnt == 0 && mRefCnt == 0) { + NS_ASSERT_OWNINGTHREAD(nsJavaXPTCStub); + mRefCnt = 1; /* stabilize */ + Destroy(); + delete this; + } +} + +void +nsJavaXPTCStub::DeleteStrongRef() +{ + if (mJavaStrongRef == nsnull) + return; + + GetJNIEnv()->DeleteGlobalRef(mJavaStrongRef); + mJavaStrongRef = nsnull; +} + +NS_IMETHODIMP +nsJavaXPTCStub::QueryInterface(const nsID &aIID, void **aInstancePtr) +{ + nsresult rv; + + LOG(("JavaStub::QueryInterface()\n")); + *aInstancePtr = nsnull; + nsJavaXPTCStub *master = mMaster ? mMaster : this; + + // This helps us differentiate between the help classes. + if (aIID.Equals(NS_GET_IID(nsJavaXPTCStub))) + { + *aInstancePtr = master; + NS_ADDREF(this); + return NS_OK; + } + + // always return the master stub for nsISupports + if (aIID.Equals(NS_GET_IID(nsISupports))) + { + *aInstancePtr = master->mXPTCStub; + NS_ADDREF(master); + return NS_OK; + } + + // All Java objects support weak references + if (aIID.Equals(NS_GET_IID(nsISupportsWeakReference))) + { + *aInstancePtr = static_cast<nsISupportsWeakReference*>(master); + NS_ADDREF(master); + return NS_OK; + } + + // does any existing stub support the requested IID? + nsJavaXPTCStub *stub = master->FindStubSupportingIID(aIID); + if (stub) + { + *aInstancePtr = stub->mXPTCStub; + NS_ADDREF(stub); + return NS_OK; + } + + JNIEnv* env = GetJNIEnv(); + + // Query Java object + LOG(("\tCalling Java object queryInterface\n")); + jobject javaObject = env->CallObjectMethod(mJavaWeakRef, getReferentMID); + + jmethodID qiMID = 0; + jclass clazz = env->GetObjectClass(javaObject); + if (clazz) { + char* sig = "(Ljava/lang/String;)Lorg/mozilla/interfaces/nsISupports;"; + qiMID = env->GetMethodID(clazz, "queryInterface", sig); + NS_ASSERTION(qiMID, "Failed to get queryInterface method ID"); + } + + if (qiMID == 0) { + env->ExceptionClear(); + return NS_NOINTERFACE; + } + + // construct IID string + jstring iid_jstr = nsnull; + char* iid_str = aIID.ToString(); + if (iid_str) { + iid_jstr = env->NewStringUTF(iid_str); + } + if (!iid_str || !iid_jstr) { + env->ExceptionClear(); + return NS_ERROR_OUT_OF_MEMORY; + } + PR_Free(iid_str); + + // call queryInterface method + jobject obj = env->CallObjectMethod(javaObject, qiMID, iid_jstr); + if (env->ExceptionCheck()) { + env->ExceptionClear(); + return NS_ERROR_FAILURE; + } + if (!obj) + return NS_NOINTERFACE; + + // Get interface info for new java object + nsCOMPtr<nsIInterfaceInfoManager> + iim(do_GetService(NS_INTERFACEINFOMANAGER_SERVICE_CONTRACTID, &rv)); + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsIInterfaceInfo> iinfo; + rv = iim->GetInfoForIID(&aIID, getter_AddRefs(iinfo)); + if (NS_FAILED(rv)) + return rv; + + stub = new nsJavaXPTCStub(obj, iinfo, &rv); + if (!stub) + return NS_ERROR_OUT_OF_MEMORY; + + if (NS_FAILED(rv)) { + delete stub; + return rv; + } + + // add stub to the master's list of children, so we can preserve + // symmetry in future QI calls. the master will delete each child + // when it is destroyed. the refcount of each child is bound to + // the refcount of the master. this is done to deal with code + // like this: + // + // nsCOMPtr<nsIBar> bar = ...; + // nsIFoo *foo; + // { + // nsCOMPtr<nsIFoo> temp = do_QueryInterface(bar); + // foo = temp; + // } + // foo->DoStuff(); + // + // while this code is not valid XPCOM (since it is using |foo| + // after having called Release on it), such code is unfortunately + // very common in the mozilla codebase. the assumption this code + // is making is that so long as |bar| is alive, it should be valid + // to access |foo| even if the code doesn't own a strong reference + // to |foo|! clearly wrong, but we need to support it anyways. + + stub->mMaster = master; + master->mChildren.AppendElement(stub); + + *aInstancePtr = stub->mXPTCStub; + NS_ADDREF(stub); + return NS_OK; +} + +PRBool +nsJavaXPTCStub::SupportsIID(const nsID &iid) +{ + PRBool match; + nsCOMPtr<nsIInterfaceInfo> iter = mIInfo; + do + { + if (NS_SUCCEEDED(iter->IsIID(&iid, &match)) && match) + return PR_TRUE; + + nsCOMPtr<nsIInterfaceInfo> parent; + iter->GetParent(getter_AddRefs(parent)); + iter = parent; + } + while (iter != nsnull); + + return PR_FALSE; +} + +nsJavaXPTCStub * +nsJavaXPTCStub::FindStubSupportingIID(const nsID &iid) +{ + NS_ASSERTION(mMaster == nsnull, "this is not a master stub"); + + if (SupportsIID(iid)) + return this; + + for (PRInt32 i = 0; i < mChildren.Count(); i++) + { + nsJavaXPTCStub *child = (nsJavaXPTCStub *) mChildren[i]; + if (child->SupportsIID(iid)) + return child; + } + return nsnull; +} + +NS_IMETHODIMP +nsJavaXPTCStub::CallMethod(PRUint16 aMethodIndex, + const XPTMethodDescriptor *aMethodInfo, + nsXPTCMiniVariant *aParams) +{ +#ifdef DEBUG_JAVAXPCOM + const char* ifaceName; + mIInfo->GetNameShared(&ifaceName); + LOG(("---> (Java) %s::%s()\n", ifaceName, aMethodInfo->name)); +#endif + + nsresult rv = NS_OK; + JNIEnv* env = GetJNIEnv(); + jobject javaObject = env->CallObjectMethod(mJavaWeakRef, getReferentMID); + + nsCAutoString methodSig("("); + + // Create jvalue array to hold Java params + PRUint8 paramCount = aMethodInfo->num_args; + jvalue* java_params = nsnull; + const nsXPTParamInfo* retvalInfo = nsnull; + if (paramCount) { + java_params = new jvalue[paramCount]; + if (!java_params) + return NS_ERROR_OUT_OF_MEMORY; + + for (PRUint8 i = 0; i < paramCount && NS_SUCCEEDED(rv); i++) + { + const nsXPTParamInfo ¶mInfo = aMethodInfo->params[i]; + if (!paramInfo.IsRetval()) { + rv = SetupJavaParams(paramInfo, aMethodInfo, aMethodIndex, aParams, + aParams[i], java_params[i], methodSig); + } else { + retvalInfo = ¶mInfo; + } + } + NS_ASSERTION(NS_SUCCEEDED(rv), "SetupJavaParams failed"); + } + + // Finish method signature + if (NS_SUCCEEDED(rv)) { + methodSig.Append(')'); + if (retvalInfo) { + nsCAutoString retvalSig; + rv = GetRetvalSig(retvalInfo, aMethodInfo, aMethodIndex, aParams, + retvalSig); + methodSig.Append(retvalSig); + } else { + methodSig.Append('V'); + } + NS_ASSERTION(NS_SUCCEEDED(rv), "GetRetvalSig failed"); + } + + // Get Java method to call + jmethodID mid = nsnull; + if (NS_SUCCEEDED(rv)) { + nsCAutoString methodName; + if (XPT_MD_IS_GETTER(aMethodInfo->flags) || + XPT_MD_IS_SETTER(aMethodInfo->flags)) { + if (XPT_MD_IS_GETTER(aMethodInfo->flags)) + methodName.AppendLiteral("get"); + else + methodName.AppendLiteral("set"); + methodName.AppendASCII(aMethodInfo->name); + methodName.SetCharAt(toupper(methodName[3]), 3); + } else { + methodName.AppendASCII(aMethodInfo->name); + methodName.SetCharAt(tolower(methodName[0]), 0); + } + // If it's a Java keyword, then prepend an underscore + if (gJavaKeywords->GetEntry(methodName.get())) { + methodName.Insert('_', 0); + } + + jclass clazz = env->GetObjectClass(javaObject); + if (clazz) + mid = env->GetMethodID(clazz, methodName.get(), methodSig.get()); + NS_ASSERTION(mid, "Failed to get requested method for Java object"); + if (!mid) + rv = NS_ERROR_FAILURE; + } + + // Call method + jvalue retval; + if (NS_SUCCEEDED(rv)) { + if (!retvalInfo) { + env->CallVoidMethodA(javaObject, mid, java_params); + } else { + switch (retvalInfo->GetType().TagPart()) + { + case nsXPTType::T_I8: + retval.b = env->CallByteMethodA(javaObject, mid, java_params); + break; + + case nsXPTType::T_I16: + case nsXPTType::T_U8: + retval.s = env->CallShortMethodA(javaObject, mid, java_params); + break; + + case nsXPTType::T_I32: + case nsXPTType::T_U16: + retval.i = env->CallIntMethodA(javaObject, mid, java_params); + break; + + case nsXPTType::T_I64: + case nsXPTType::T_U32: + retval.j = env->CallLongMethodA(javaObject, mid, java_params); + break; + + case nsXPTType::T_FLOAT: + retval.f = env->CallFloatMethodA(javaObject, mid, java_params); + break; + + case nsXPTType::T_U64: + case nsXPTType::T_DOUBLE: + retval.d = env->CallDoubleMethodA(javaObject, mid, java_params); + break; + + case nsXPTType::T_BOOL: + retval.z = env->CallBooleanMethodA(javaObject, mid, java_params); + break; + + case nsXPTType::T_CHAR: + case nsXPTType::T_WCHAR: + retval.c = env->CallCharMethodA(javaObject, mid, java_params); + 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: + retval.l = env->CallObjectMethodA(javaObject, mid, java_params); + break; + + case nsXPTType::T_VOID: + retval.j = env->CallLongMethodA(javaObject, mid, java_params); + break; + + default: + NS_WARNING("Unhandled retval type"); + break; + } + } + + // Check for exception from called Java function + jthrowable exp = env->ExceptionOccurred(); + if (exp) { + // If the exception is an instance of XPCOMException, then get the + // nsresult from the exception instance. Else, default to + // NS_ERROR_FAILURE. + if (env->IsInstanceOf(exp, xpcomExceptionClass)) { + jfieldID fid; + fid = env->GetFieldID(xpcomExceptionClass, "errorcode", "J"); + if (fid) { + rv = env->GetLongField(exp, fid); + } else { + rv = NS_ERROR_FAILURE; + } + NS_ASSERTION(fid, "Couldn't get 'errorcode' field of XPCOMException"); + } else { + rv = NS_ERROR_FAILURE; + } + } + } + + // Handle any 'inout', 'out' and 'retval' params + if (NS_SUCCEEDED(rv)) { + for (PRUint8 i = 0; i < paramCount; i++) + { + const nsXPTParamInfo ¶mInfo = aMethodInfo->params[i]; + if (paramInfo.IsIn() && !paramInfo.IsOut() && !paramInfo.IsDipper()) // 'in' + continue; + + // If param is null, then caller is not expecting an output value. + if (aParams[i].val.p == nsnull) + continue; + + if (!paramInfo.IsRetval()) { + rv = FinalizeJavaParams(paramInfo, aMethodInfo, aMethodIndex, aParams, + aParams[i], java_params[i]); + } else { + rv = FinalizeJavaParams(paramInfo, aMethodInfo, aMethodIndex, aParams, + aParams[i], retval); + } + } + NS_ASSERTION(NS_SUCCEEDED(rv), "FinalizeJavaParams/SetXPCOMRetval failed"); + } + + if (java_params) + delete [] java_params; + +#ifdef DEBUG + if (env->ExceptionCheck()) + env->ExceptionDescribe(); +#endif + env->ExceptionClear(); + + LOG(("<--- (Java) %s::%s()\n", ifaceName, aMethodInfo->name)); + return rv; +} + +/** + * Handle 'in', 'inout', and 'out' params + */ +nsresult +nsJavaXPTCStub::SetupJavaParams(const nsXPTParamInfo &aParamInfo, + const XPTMethodDescriptor* aMethodInfo, + PRUint16 aMethodIndex, + nsXPTCMiniVariant* aDispatchParams, + nsXPTCMiniVariant &aVariant, jvalue &aJValue, + nsACString &aMethodSig) +{ + nsresult rv = NS_OK; + JNIEnv* env = GetJNIEnv(); + const nsXPTType &type = aParamInfo.GetType(); + + PRUint8 tag = type.TagPart(); + switch (tag) + { + case nsXPTType::T_I8: + { + if (!aParamInfo.IsOut()) { // 'in' + aJValue.b = aVariant.val.i8; + aMethodSig.Append('B'); + } else { // 'inout' & 'out' + if (aVariant.val.p) { + jbyteArray array = env->NewByteArray(1); + if (!array) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + + env->SetByteArrayRegion(array, 0, 1, (jbyte*) aVariant.val.p); + aJValue.l = array; + } else { + aJValue.l = nsnull; + } + aMethodSig.AppendLiteral("[B"); + } + } + break; + + case nsXPTType::T_I16: + case nsXPTType::T_U8: + { + if (!aParamInfo.IsOut()) { // 'in' + aJValue.s = (tag == nsXPTType::T_I16) ? aVariant.val.i16 : + aVariant.val.u8; + aMethodSig.Append('S'); + } else { // 'inout' & 'out' + if (aVariant.val.p) { + jshortArray array = env->NewShortArray(1); + if (!array) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + + env->SetShortArrayRegion(array, 0, 1, (jshort*) aVariant.val.p); + aJValue.l = array; + } else { + aJValue.l = nsnull; + } + aMethodSig.AppendLiteral("[S"); + } + } + break; + + case nsXPTType::T_I32: + case nsXPTType::T_U16: + { + if (!aParamInfo.IsOut()) { // 'in' + aJValue.i = (tag == nsXPTType::T_I32) ? aVariant.val.i32 : + aVariant.val.u16; + aMethodSig.Append('I'); + } else { // 'inout' & 'out' + if (aVariant.val.p) { + jintArray array = env->NewIntArray(1); + if (!array) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + + env->SetIntArrayRegion(array, 0, 1, (jint*) aVariant.val.p); + aJValue.l = array; + } else { + aJValue.l = nsnull; + } + aMethodSig.AppendLiteral("[I"); + } + } + break; + + case nsXPTType::T_I64: + case nsXPTType::T_U32: + { + if (!aParamInfo.IsOut()) { // 'in' + aJValue.j = (tag == nsXPTType::T_I64) ? aVariant.val.i64 : + aVariant.val.u32; + aMethodSig.Append('J'); + } else { // 'inout' & 'out' + if (aVariant.val.p) { + jlongArray array = env->NewLongArray(1); + if (!array) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + + env->SetLongArrayRegion(array, 0, 1, (jlong*) aVariant.val.p); + aJValue.l = array; + } else { + aJValue.l = nsnull; + } + aMethodSig.AppendLiteral("[J"); + } + } + break; + + case nsXPTType::T_FLOAT: + { + if (!aParamInfo.IsOut()) { // 'in' + aJValue.f = aVariant.val.f; + aMethodSig.Append('F'); + } else { // 'inout' & 'out' + if (aVariant.val.p) { + jfloatArray array = env->NewFloatArray(1); + if (!array) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + + env->SetFloatArrayRegion(array, 0, 1, (jfloat*) aVariant.val.p); + aJValue.l = array; + } else { + aJValue.l = nsnull; + } + aMethodSig.AppendLiteral("[F"); + } + } + break; + + // XXX how do we handle unsigned 64-bit values? + case nsXPTType::T_U64: + case nsXPTType::T_DOUBLE: + { + if (!aParamInfo.IsOut()) { // 'in' + aJValue.d = (tag == nsXPTType::T_DOUBLE) ? aVariant.val.d : + aVariant.val.u64; + aMethodSig.Append('D'); + } else { // 'inout' & 'out' + if (aVariant.val.p) { + jdoubleArray array = env->NewDoubleArray(1); + if (!array) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + + env->SetDoubleArrayRegion(array, 0, 1, (jdouble*) aVariant.val.p); + aJValue.l = array; + } else { + aJValue.l = nsnull; + } + aMethodSig.AppendLiteral("[D"); + } + } + break; + + case nsXPTType::T_BOOL: + { + if (!aParamInfo.IsOut()) { // 'in' + aJValue.z = aVariant.val.b; + aMethodSig.Append('Z'); + } else { // 'inout' & 'out' + if (aVariant.val.p) { + jbooleanArray array = env->NewBooleanArray(1); + if (!array) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + + env->SetBooleanArrayRegion(array, 0, 1, (jboolean*) aVariant.val.p); + aJValue.l = array; + } else { + aJValue.l = nsnull; + } + aMethodSig.AppendLiteral("[Z"); + } + } + break; + + case nsXPTType::T_CHAR: + case nsXPTType::T_WCHAR: + { + if (!aParamInfo.IsOut()) { // 'in' + if (tag == nsXPTType::T_CHAR) + aJValue.c = aVariant.val.c; + else + aJValue.c = aVariant.val.wc; + aMethodSig.Append('C'); + } else { // 'inout' & 'out' + if (aVariant.val.p) { + jcharArray array = env->NewCharArray(1); + if (!array) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + + env->SetCharArrayRegion(array, 0, 1, (jchar*) aVariant.val.p); + aJValue.l = array; + } else { + aJValue.l = nsnull; + } + aMethodSig.AppendLiteral("[C"); + } + } + break; + + case nsXPTType::T_CHAR_STR: + case nsXPTType::T_WCHAR_STR: + { + void* ptr = nsnull; + if (!aParamInfo.IsOut()) { // 'in' + ptr = aVariant.val.p; + } else if (aVariant.val.p) { // 'inout' & 'out' + void** variant = static_cast<void**>(aVariant.val.p); + ptr = *variant; + } + + jobject str; + if (ptr) { + if (tag == nsXPTType::T_CHAR_STR) { + str = env->NewStringUTF((const char*) ptr); + } else { + const PRUnichar* buf = (const PRUnichar*) ptr; + str = env->NewString(buf, nsCRT::strlen(buf)); + } + if (!str) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + } else { + str = nsnull; + } + + if (!aParamInfo.IsOut()) { // 'in' + aJValue.l = str; + aMethodSig.AppendLiteral("Ljava/lang/String;"); + } else { // 'inout' & 'out' + if (aVariant.val.p) { + aJValue.l = env->NewObjectArray(1, stringClass, str); + if (aJValue.l == nsnull) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + } else { + aJValue.l = nsnull; + } + aMethodSig.AppendLiteral("[Ljava/lang/String;"); + } + } + break; + + case nsXPTType::T_IID: + { + nsID* iid = nsnull; + if (!aParamInfo.IsOut()) { // 'in' + iid = static_cast<nsID*>(aVariant.val.p); + } else if (aVariant.val.p) { // 'inout' & 'out' + nsID** variant = static_cast<nsID**>(aVariant.val.p); + iid = *variant; + } + + jobject str = nsnull; + if (iid) { + char iid_str[NSID_LENGTH]; + iid->ToProvidedString(iid_str); + str = env->NewStringUTF(iid_str); + if (!str) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + } + + if (!aParamInfo.IsOut()) { // 'in' + aJValue.l = str; + aMethodSig.AppendLiteral("Ljava/lang/String;"); + } else { // 'inout' & 'out' + if (aVariant.val.p) { + aJValue.l = env->NewObjectArray(1, stringClass, str); + if (aJValue.l == nsnull) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + } else { + aJValue.l = nsnull; + } + aMethodSig.AppendLiteral("[Ljava/lang/String;"); + } + } + break; + + case nsXPTType::T_INTERFACE: + case nsXPTType::T_INTERFACE_IS: + { + nsISupports* xpcom_obj = nsnull; + if (!aParamInfo.IsOut()) { // 'in' + xpcom_obj = static_cast<nsISupports*>(aVariant.val.p); + } else if (aVariant.val.p) { // 'inout' & 'out' + nsISupports** variant = static_cast<nsISupports**>(aVariant.val.p); + xpcom_obj = *variant; + } + + nsID iid; + rv = GetIIDForMethodParam(mIInfo, aMethodInfo, aParamInfo, + aParamInfo.GetType().TagPart(), aMethodIndex, + aDispatchParams, PR_FALSE, iid); + if (NS_FAILED(rv)) + break; + + // get name of interface + char* iface_name = nsnull; + nsCOMPtr<nsIInterfaceInfoManager> + iim(do_GetService(NS_INTERFACEINFOMANAGER_SERVICE_CONTRACTID, &rv)); + if (NS_FAILED(rv)) + break; + + rv = iim->GetNameForIID(&iid, &iface_name); + if (NS_FAILED(rv) || !iface_name) + break; + + jobject java_stub = nsnull; + if (xpcom_obj) { + // Get matching Java object for given xpcom object + jobject objLoader = env->CallObjectMethod(mJavaWeakRef, getReferentMID); + rv = NativeInterfaceToJavaObject(env, xpcom_obj, iid, objLoader, + &java_stub); + if (NS_FAILED(rv)) + break; + } + + if (!aParamInfo.IsOut()) { // 'in' + aJValue.l = java_stub; + } else { // 'inout' & 'out' + if (aVariant.val.p) { + aJValue.l = env->NewObjectArray(1, nsISupportsClass, java_stub); + if (aJValue.l == nsnull) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + } else { + aJValue.l = nsnull; + } + aMethodSig.Append('['); + } + + if (tag != nsXPTType::T_INTERFACE_IS) { + aMethodSig.AppendLiteral("Lorg/mozilla/interfaces/"); + aMethodSig.AppendASCII(iface_name); + aMethodSig.Append(';'); + } else { + aMethodSig.AppendLiteral("Lorg/mozilla/interfaces/nsISupports;"); + } + + nsMemory::Free(iface_name); + } + break; + + case nsXPTType::T_ASTRING: + case nsXPTType::T_DOMSTRING: + { + // This only handle 'in' or 'in dipper' params. In XPIDL, the 'out' + // descriptor is mapped to 'in dipper'. + NS_PRECONDITION(aParamInfo.IsIn(), "unexpected param descriptor"); + if (!aParamInfo.IsIn()) { + rv = NS_ERROR_UNEXPECTED; + break; + } + + nsString* str = static_cast<nsString*>(aVariant.val.p); + if (!str) { + rv = NS_ERROR_FAILURE; + break; + } + + jstring jstr = nsnull; + if (!str->IsVoid()) { + jstr = env->NewString(str->get(), str->Length()); + if (!jstr) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + } + + aJValue.l = jstr; + aMethodSig.AppendLiteral("Ljava/lang/String;"); + } + break; + + case nsXPTType::T_UTF8STRING: + case nsXPTType::T_CSTRING: + { + // This only handle 'in' or 'in dipper' params. In XPIDL, the 'out' + // descriptor is mapped to 'in dipper'. + NS_PRECONDITION(aParamInfo.IsIn(), "unexpected param descriptor"); + if (!aParamInfo.IsIn()) { + rv = NS_ERROR_UNEXPECTED; + break; + } + + nsCString* str = static_cast<nsCString*>(aVariant.val.p); + if (!str) { + rv = NS_ERROR_FAILURE; + break; + } + + jstring jstr = nsnull; + if (!str->IsVoid()) { + jstr = env->NewStringUTF(str->get()); + if (!jstr) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + } + + aJValue.l = jstr; + aMethodSig.AppendLiteral("Ljava/lang/String;"); + } + break; + + // Pass the 'void*' address as a long + case nsXPTType::T_VOID: + { + if (!aParamInfo.IsOut()) { // 'in' + aJValue.j = reinterpret_cast<jlong>(aVariant.val.p); + aMethodSig.Append('J'); + } else { // 'inout' & 'out' + if (aVariant.val.p) { + jlongArray array = env->NewLongArray(1); + if (!array) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + + env->SetLongArrayRegion(array, 0, 1, (jlong*) aVariant.val.p); + aJValue.l = array; + } else { + aJValue.l = nsnull; + } + aMethodSig.AppendLiteral("[J"); + } + } + break; + + case nsXPTType::T_ARRAY: + NS_WARNING("array types are not yet supported"); + return NS_ERROR_NOT_IMPLEMENTED; + break; + + case nsXPTType::T_PSTRING_SIZE_IS: + case nsXPTType::T_PWSTRING_SIZE_IS: + default: + NS_WARNING("unexpected parameter type"); + return NS_ERROR_UNEXPECTED; + } + + return rv; +} + +nsresult +nsJavaXPTCStub::GetRetvalSig(const nsXPTParamInfo* aParamInfo, + const XPTMethodDescriptor* aMethodInfo, + PRUint16 aMethodIndex, + nsXPTCMiniVariant* aDispatchParams, + nsACString &aRetvalSig) +{ + PRUint8 type = aParamInfo->GetType().TagPart(); + switch (type) + { + case nsXPTType::T_I8: + aRetvalSig.Append('B'); + break; + + case nsXPTType::T_I16: + case nsXPTType::T_U8: + aRetvalSig.Append('S'); + break; + + case nsXPTType::T_I32: + case nsXPTType::T_U16: + aRetvalSig.Append('I'); + break; + + case nsXPTType::T_I64: + case nsXPTType::T_U32: + aRetvalSig.Append('J'); + break; + + case nsXPTType::T_FLOAT: + aRetvalSig.Append('F'); + break; + + case nsXPTType::T_U64: + case nsXPTType::T_DOUBLE: + aRetvalSig.Append('D'); + break; + + case nsXPTType::T_BOOL: + aRetvalSig.Append('Z'); + break; + + case nsXPTType::T_CHAR: + case nsXPTType::T_WCHAR: + aRetvalSig.Append('C'); + 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: + aRetvalSig.AppendLiteral("Ljava/lang/String;"); + break; + + case nsXPTType::T_INTERFACE: + { + nsID iid; + nsresult rv = GetIIDForMethodParam(mIInfo, aMethodInfo, *aParamInfo, type, + aMethodIndex, aDispatchParams, + PR_FALSE, iid); + if (NS_FAILED(rv)) + break; + + // get name of interface + char* iface_name = nsnull; + nsCOMPtr<nsIInterfaceInfoManager> + iim(do_GetService(NS_INTERFACEINFOMANAGER_SERVICE_CONTRACTID, &rv)); + if (NS_FAILED(rv)) + break; + + rv = iim->GetNameForIID(&iid, &iface_name); + if (NS_FAILED(rv) || !iface_name) + break; + + aRetvalSig.AppendLiteral("Lorg/mozilla/interfaces/"); + aRetvalSig.AppendASCII(iface_name); + aRetvalSig.Append(';'); + nsMemory::Free(iface_name); + break; + } + + case nsXPTType::T_INTERFACE_IS: + aRetvalSig.AppendLiteral("Lorg/mozilla/interfaces/nsISupports;"); + break; + + case nsXPTType::T_VOID: + aRetvalSig.Append('J'); + break; + + case nsXPTType::T_ARRAY: + NS_WARNING("array types are not yet supported"); + return NS_ERROR_NOT_IMPLEMENTED; + break; + + case nsXPTType::T_PSTRING_SIZE_IS: + case nsXPTType::T_PWSTRING_SIZE_IS: + default: + NS_WARNING("unexpected parameter type"); + return NS_ERROR_UNEXPECTED; + } + + return NS_OK; +} + +/** + * Handle 'inout', 'out', and 'retval' params + */ +nsresult +nsJavaXPTCStub::FinalizeJavaParams(const nsXPTParamInfo &aParamInfo, + const XPTMethodDescriptor *aMethodInfo, + PRUint16 aMethodIndex, + nsXPTCMiniVariant* aDispatchParams, + nsXPTCMiniVariant &aVariant, jvalue &aJValue) +{ + nsresult rv = NS_OK; + JNIEnv* env = GetJNIEnv(); + const nsXPTType &type = aParamInfo.GetType(); + + PRUint8 tag = type.TagPart(); + switch (tag) + { + case nsXPTType::T_I8: + { + jbyte value; + if (aParamInfo.IsRetval()) { // 'retval' + value = aJValue.b; + } else if (aJValue.l) { // 'inout' & 'out' + env->GetByteArrayRegion((jbyteArray) aJValue.l, 0, 1, &value); + } + if (aVariant.val.p) + *((PRInt8 *) aVariant.val.p) = value; + } + break; + + case nsXPTType::T_U8: + case nsXPTType::T_I16: + { + jshort value = 0; + if (aParamInfo.IsRetval()) { // 'retval' + value = aJValue.s; + } else if (aJValue.l) { // 'inout' & 'out' + env->GetShortArrayRegion((jshortArray) aJValue.l, 0, 1, &value); + } + + if (aVariant.val.p) { + if (tag == nsXPTType::T_U8) + *((PRUint8 *) aVariant.val.p) = value; + else + *((PRInt16 *) aVariant.val.p) = value; + } + } + break; + + case nsXPTType::T_U16: + case nsXPTType::T_I32: + { + jint value = 0; + if (aParamInfo.IsRetval()) { // 'retval' + value = aJValue.i; + } else if (aJValue.l) { // 'inout' & 'out' + env->GetIntArrayRegion((jintArray) aJValue.l, 0, 1, &value); + } + + if (aVariant.val.p) { + if (tag == nsXPTType::T_U16) + *((PRUint16 *) aVariant.val.p) = value; + else + *((PRInt32 *) aVariant.val.p) = value; + } + } + break; + + case nsXPTType::T_U32: + case nsXPTType::T_I64: + { + jlong value = 0; + if (aParamInfo.IsRetval()) { // 'retval' + value = aJValue.j; + } else if (aJValue.l) { // 'inout' & 'out' + env->GetLongArrayRegion((jlongArray) aJValue.l, 0, 1, &value); + } + + if (aVariant.val.p) { + if (tag == nsXPTType::T_U32) + *((PRUint32 *) aVariant.val.p) = value; + else + *((PRInt64 *) aVariant.val.p) = value; + } + } + break; + + case nsXPTType::T_FLOAT: + { + if (aParamInfo.IsRetval()) { // 'retval' + *((float *) aVariant.val.p) = aJValue.f; + } else if (aJValue.l) { // 'inout' & 'out' + env->GetFloatArrayRegion((jfloatArray) aJValue.l, 0, 1, + (jfloat*) aVariant.val.p); + } + } + break; + + // XXX how do we handle 64-bit values? + case nsXPTType::T_U64: + case nsXPTType::T_DOUBLE: + { + jdouble value = 0; + if (aParamInfo.IsRetval()) { // 'retval' + value = aJValue.d; + } else if (aJValue.l) { // 'inout' & 'out' + env->GetDoubleArrayRegion((jdoubleArray) aJValue.l, 0, 1, &value); + } + + if (aVariant.val.p) { + if (tag == nsXPTType::T_DOUBLE) + *((double *) aVariant.val.p) = value; + else + *((PRUint64 *) aVariant.val.p) = static_cast<PRUint64>(value); + } + } + break; + + case nsXPTType::T_BOOL: + { + if (aParamInfo.IsRetval()) { // 'retval' + *((PRBool *) aVariant.val.p) = aJValue.z; + } else if (aJValue.l) { // 'inout' & 'out' + env->GetBooleanArrayRegion((jbooleanArray) aJValue.l, 0, 1, + (jboolean*) aVariant.val.p); + } + } + break; + + case nsXPTType::T_CHAR: + case nsXPTType::T_WCHAR: + { + if (aParamInfo.IsRetval()) { // 'retval' + if (type.TagPart() == nsXPTType::T_CHAR) + *((char *) aVariant.val.p) = aJValue.c; + else + *((PRUnichar *) aVariant.val.p) = aJValue.c; + } else if (aJValue.l) { // 'inout' & 'out' + jchar* array = env->GetCharArrayElements((jcharArray) aJValue.l, + nsnull); + if (!array) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + + if (type.TagPart() == nsXPTType::T_CHAR) + *((char *) aVariant.val.p) = array[0]; + else + *((PRUnichar *) aVariant.val.p) = array[0]; + + env->ReleaseCharArrayElements((jcharArray) aJValue.l, array, JNI_ABORT); + } + } + break; + + case nsXPTType::T_CHAR_STR: + { + jstring str = nsnull; + if (aParamInfo.IsRetval()) { // 'retval' + str = (jstring) aJValue.l; + } else { // 'inout' & 'out' + str = (jstring) env->GetObjectArrayElement((jobjectArray) aJValue.l, 0); + } + + char** variant = static_cast<char**>(aVariant.val.p); + if (str) { + // Get string buffer + const char* char_ptr = env->GetStringUTFChars(str, nsnull); + if (!char_ptr) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + + // If new string is different from one passed in, free old string + // and replace with new string. + if (aParamInfo.IsRetval() || + *variant == nsnull || strcmp(*variant, char_ptr) != 0) + { + if (!aParamInfo.IsRetval() && *variant) + PR_Free(*variant); + + *variant = strdup(char_ptr); + if (*variant == nsnull) { + rv = NS_ERROR_OUT_OF_MEMORY; + // don't 'break'; fall through to release chars + } + } + + // Release string buffer + env->ReleaseStringUTFChars(str, char_ptr); + } else { + // If we were passed in a string, delete it now, and set to null. + // (Only for 'inout' & 'out' params) + if (*variant && !aParamInfo.IsRetval()) { + PR_Free(*variant); + } + *variant = nsnull; + } + } + break; + + case nsXPTType::T_WCHAR_STR: + { + jstring str = nsnull; + if (aParamInfo.IsRetval()) { // 'retval' + str = (jstring) aJValue.l; + } else { // 'inout' & 'out' + str = (jstring) env->GetObjectArrayElement((jobjectArray) aJValue.l, 0); + } + + PRUnichar** variant = static_cast<PRUnichar**>(aVariant.val.p); + if (str) { + // Get string buffer + const jchar* wchar_ptr = env->GetStringChars(str, nsnull); + if (!wchar_ptr) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + + // If new string is different from one passed in, free old string + // and replace with new string. We + if (aParamInfo.IsRetval() || + *variant == nsnull || nsCRT::strcmp(*variant, wchar_ptr) != 0) + { + if (!aParamInfo.IsRetval() && *variant) + PR_Free(*variant); + + PRUint32 length = nsCRT::strlen(wchar_ptr); + *variant = (PRUnichar*) PR_Malloc((length + 1) * sizeof(PRUnichar)); + if (*variant) { + memcpy(*variant, wchar_ptr, length * sizeof(PRUnichar)); + (*variant)[length] = 0; + } else { + rv = NS_ERROR_OUT_OF_MEMORY; + // don't 'break'; fall through to release chars + } + } + + // Release string buffer + env->ReleaseStringChars(str, wchar_ptr); + } else { + // If we were passed in a string, delete it now, and set to null. + // (Only for 'inout' & 'out' params) + if (*variant && !aParamInfo.IsRetval()) { + PR_Free(*variant); + } + *variant = nsnull; + } + } + break; + + case nsXPTType::T_IID: + { + jstring str = nsnull; + if (aParamInfo.IsRetval()) { // 'retval' + str = (jstring) aJValue.l; + } else { // 'inout' & 'out' + str = (jstring) env->GetObjectArrayElement((jobjectArray) aJValue.l, 0); + } + + nsID** variant = static_cast<nsID**>(aVariant.val.p); + if (str) { + // Get string buffer + const char* char_ptr = env->GetStringUTFChars(str, nsnull); + if (!char_ptr) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + + if (!aParamInfo.IsRetval() && *variant) { + // If we were given an nsID, set it to the new string + nsID* oldIID = *variant; + oldIID->Parse(char_ptr); + } else { + // If the argument that was passed in was null, then we need to + // create a new nsID. + nsID* newIID = new nsID; + if (newIID) { + newIID->Parse(char_ptr); + *variant = newIID; + } else { + rv = NS_ERROR_OUT_OF_MEMORY; + // don't 'break'; fall through to release chars + } + } + + // Release string buffer + env->ReleaseStringUTFChars(str, char_ptr); + } else { + // If we were passed in an nsID, delete it now, and set to null. + // (Free only 'inout' & 'out' params) + if (*variant && !aParamInfo.IsRetval()) { + delete *variant; + } + *variant = nsnull; + } + } + break; + + case nsXPTType::T_INTERFACE: + case nsXPTType::T_INTERFACE_IS: + { + jobject java_obj = nsnull; + if (aParamInfo.IsRetval()) { // 'retval' + java_obj = aJValue.l; + } else if (aJValue.l) { // 'inout' & 'out' + java_obj = env->GetObjectArrayElement((jobjectArray) aJValue.l, 0); + } + + void* xpcom_obj = nsnull; + if (java_obj) { + // Get IID for this param + nsID iid; + rv = GetIIDForMethodParam(mIInfo, aMethodInfo, aParamInfo, + aParamInfo.GetType().TagPart(), aMethodIndex, + aDispatchParams, PR_FALSE, iid); + if (NS_FAILED(rv)) + break; + + // 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; + if (iid.Equals(NS_GET_IID(nsIWeakReference))) { + isWeakRef = PR_TRUE; + iid = NS_GET_IID(nsISupports); + } else { + isWeakRef = PR_FALSE; + } + + rv = JavaObjectToNativeInterface(env, java_obj, iid, &xpcom_obj); + if (NS_FAILED(rv)) + break; + rv = ((nsISupports*) xpcom_obj)->QueryInterface(iid, &xpcom_obj); + if (NS_FAILED(rv)) + break; + + // If the function expects a weak reference, then we need to + // create it here. + if (isWeakRef) { + nsISupports* isupports = (nsISupports*) xpcom_obj; + nsCOMPtr<nsISupportsWeakReference> supportsweak = + do_QueryInterface(isupports); + if (supportsweak) { + nsWeakPtr weakref; + supportsweak->GetWeakReference(getter_AddRefs(weakref)); + NS_RELEASE(isupports); + xpcom_obj = weakref; + NS_ADDREF((nsISupports*) xpcom_obj); + } else { + xpcom_obj = nsnull; + } + } + } + + // For 'inout' params, if the resulting xpcom value is different than the + // one passed in, then we must release the incoming xpcom value. + nsISupports** variant = static_cast<nsISupports**>(aVariant.val.p); + if (aParamInfo.IsIn() && *variant) { + nsCOMPtr<nsISupports> in = do_QueryInterface(*variant); + nsCOMPtr<nsISupports> out = do_QueryInterface((nsISupports*) xpcom_obj); + if (in != out) { + NS_RELEASE(*variant); + } + } + + *(static_cast<void**>(aVariant.val.p)) = xpcom_obj; + } + break; + + case nsXPTType::T_ASTRING: + case nsXPTType::T_DOMSTRING: + { + NS_PRECONDITION(aParamInfo.IsDipper(), "string argument is not dipper"); + if (!aParamInfo.IsDipper()) { + rv = NS_ERROR_UNEXPECTED; + break; + } + + jstring jstr = (jstring) aJValue.l; + nsString* variant = static_cast<nsString*>(aVariant.val.p); + + if (jstr) { + // Get string buffer + const jchar* wchar_ptr = env->GetStringChars(jstr, nsnull); + if (!wchar_ptr) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + + variant->Assign(wchar_ptr); + + // release String buffer + env->ReleaseStringChars(jstr, wchar_ptr); + } else { + variant->SetIsVoid(PR_TRUE); + } + } + break; + + case nsXPTType::T_UTF8STRING: + case nsXPTType::T_CSTRING: + { + NS_PRECONDITION(aParamInfo.IsDipper(), "string argument is not dipper"); + if (!aParamInfo.IsDipper()) { + rv = NS_ERROR_UNEXPECTED; + break; + } + + jstring jstr = (jstring) aJValue.l; + nsCString* variant = static_cast<nsCString*>(aVariant.val.p); + + if (jstr) { + // Get string buffer + const char* char_ptr = env->GetStringUTFChars(jstr, nsnull); + if (!char_ptr) { + rv = NS_ERROR_OUT_OF_MEMORY; + break; + } + + variant->Assign(char_ptr); + + // release String buffer + env->ReleaseStringUTFChars(jstr, char_ptr); + } else { + variant->SetIsVoid(PR_TRUE); + } + } + break; + + case nsXPTType::T_VOID: + { + if (aParamInfo.IsRetval()) { // 'retval' + aVariant.val.p = reinterpret_cast<void*>(aJValue.j); + } else if (aJValue.l) { // 'inout' & 'out' + env->GetLongArrayRegion((jlongArray) aJValue.l, 0, 1, + (jlong*) aVariant.val.p); + } + } + break; + + default: + NS_WARNING("unexpected parameter type"); + return NS_ERROR_UNEXPECTED; + } + + return rv; +} + +NS_IMETHODIMP +nsJavaXPTCStub::GetWeakReference(nsIWeakReference** aInstancePtr) +{ + if (mMaster) + return mMaster->GetWeakReference(aInstancePtr); + + LOG(("==> nsJavaXPTCStub::GetWeakReference()\n")); + + if (!aInstancePtr) + return NS_ERROR_NULL_POINTER; + + jobject javaObject = GetJNIEnv()->CallObjectMethod(mJavaWeakRef, + getReferentMID); + nsJavaXPTCStubWeakRef* weakref; + weakref = new nsJavaXPTCStubWeakRef(javaObject, this); + if (!weakref) + return NS_ERROR_OUT_OF_MEMORY; + + *aInstancePtr = weakref; + NS_ADDREF(*aInstancePtr); + ++mWeakRefCnt; + + return NS_OK; +} + +jobject +nsJavaXPTCStub::GetJavaObject() +{ + JNIEnv* env = GetJNIEnv(); + jobject javaObject = env->CallObjectMethod(mJavaWeakRef, getReferentMID); + +#ifdef DEBUG_JAVAXPCOM + nsIID* iid; + mIInfo->GetInterfaceIID(&iid); + char* iid_str = iid->ToString(); + LOG(("< nsJavaXPTCStub (Java=%08x | XPCOM=%08x | IID=%s)\n", + (PRUint32) mJavaRefHashCode, (PRUint32) this, iid_str)); + PR_Free(iid_str); + nsMemory::Free(iid); +#endif + + return javaObject; +} + + +/*static*/ nsresult +nsJavaXPTCStub::GetNewOrUsed(JNIEnv* env, jobject aJavaObject, + const nsIID& aIID, void** aResult) +{ + nsJavaXPTCStub* stub; + jint hash = env->CallStaticIntMethod(systemClass, hashCodeMID, aJavaObject); + nsresult rv = gJavaToXPTCStubMap->Find(hash, aIID, &stub); + NS_ENSURE_SUCCESS(rv, rv); + if (stub) { + // stub is already AddRef'd and QI'd + *aResult = stub; + return NS_OK; + } + + // If there is no corresponding XPCOM object, then that means that the + // parameter is a non-generated class (that is, it is not one of our + // Java stubs that represent an exising XPCOM object). So we need to + // create an XPCOM stub, that can route any method calls to the class. + + // Get interface info for class + nsCOMPtr<nsIInterfaceInfoManager> + iim(do_GetService(NS_INTERFACEINFOMANAGER_SERVICE_CONTRACTID, &rv)); + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsIInterfaceInfo> iinfo; + rv = iim->GetInfoForIID(&aIID, getter_AddRefs(iinfo)); + NS_ENSURE_SUCCESS(rv, rv); + + // Create XPCOM stub + stub = new nsJavaXPTCStub(aJavaObject, iinfo, &rv); + if (!stub) + return NS_ERROR_OUT_OF_MEMORY; + if (NS_FAILED(rv)) { + delete stub; + return rv; + } + + rv = gJavaToXPTCStubMap->Add(hash, stub); + if (NS_FAILED(rv)) { + delete stub; + return rv; + } + + NS_ADDREF(stub); + *aResult = stub; + + return NS_OK; +} |