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Bug 270889 - nsIDirectoryServiceProvider2 impl. r=darin
Original committer: pedemont%us.ibm.com Original revision: 1.4 Original date: 2005/01/12 18:23:59
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@ -36,15 +36,16 @@
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* ***** END LICENSE BLOCK ***** */
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#include "nsAppFileLocProviderProxy.h"
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#include "nsILocalFile.h"
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#include "nsJavaXPCOMBindingUtils.h"
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#include "nsILocalFile.h"
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#include "nsISimpleEnumerator.h"
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nsAppFileLocProviderProxy::nsAppFileLocProviderProxy(JNIEnv* env,
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jobject aJavaObject)
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: mJavaEnv(env)
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{
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mJavaLocProvider = mJavaEnv->NewGlobalRef(aJavaObject);
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mJavaLocProvider = env->NewGlobalRef(aJavaObject);
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}
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nsAppFileLocProviderProxy::~nsAppFileLocProviderProxy()
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@ -52,9 +53,13 @@ nsAppFileLocProviderProxy::~nsAppFileLocProviderProxy()
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mJavaEnv->DeleteGlobalRef(mJavaLocProvider);
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}
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NS_IMPL_ISUPPORTS1(nsAppFileLocProviderProxy, nsIDirectoryServiceProvider)
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NS_IMPL_ISUPPORTS2(nsAppFileLocProviderProxy,
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nsIDirectoryServiceProvider,
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nsIDirectoryServiceProvider2)
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// nsIDirectoryServiceProvider
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NS_IMETHODIMP
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nsAppFileLocProviderProxy::GetFile(const char* aProp, PRBool* aIsPersistant,
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nsIFile** aResult)
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@ -107,3 +112,137 @@ nsAppFileLocProviderProxy::GetFile(const char* aProp, PRBool* aIsPersistant,
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return rv;
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}
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// nsIDirectoryServiceProvider2
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class DirectoryEnumerator : public nsISimpleEnumerator
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{
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public:
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NS_DECL_ISUPPORTS
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DirectoryEnumerator(JNIEnv* env, jobjectArray aJavaFileArray)
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: mJavaEnv(env)
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, mIndex(0)
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{
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mJavaFileArray = NS_STATIC_CAST(jobjectArray,
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env->NewGlobalRef(aJavaFileArray));
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mArraySize = env->GetArrayLength(aJavaFileArray);
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}
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~DirectoryEnumerator()
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{
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mJavaEnv->DeleteGlobalRef(mJavaFileArray);
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}
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NS_IMETHOD HasMoreElements(PRBool* aResult)
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{
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if (!mJavaFileArray) {
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*aResult = PR_FALSE;
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} else {
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*aResult = (mIndex < mArraySize);
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}
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return NS_OK;
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}
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NS_IMETHOD GetNext(nsISupports** aResult)
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{
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nsresult rv = NS_ERROR_FAILURE;
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jobject javaFile = mJavaEnv->GetObjectArrayElement(mJavaFileArray, mIndex++);
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if (javaFile) {
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nsCOMPtr<nsILocalFile> localFile;
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rv = File_to_nsILocalFile(mJavaEnv, javaFile, getter_AddRefs(localFile));
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mJavaEnv->DeleteLocalRef(javaFile);
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if (NS_SUCCEEDED(rv)) {
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return localFile->QueryInterface(NS_GET_IID(nsIFile), (void**)aResult);
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}
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}
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mJavaEnv->ExceptionClear();
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return NS_ERROR_FAILURE;
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}
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private:
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JNIEnv* mJavaEnv;
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jobjectArray mJavaFileArray;
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PRUint32 mArraySize;
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PRUint32 mIndex;
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};
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NS_IMPL_ISUPPORTS1(DirectoryEnumerator, nsISimpleEnumerator)
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NS_IMETHODIMP
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nsAppFileLocProviderProxy::GetFiles(const char* aProp,
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nsISimpleEnumerator** aResult)
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{
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nsresult rv = NS_OK;
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// Setup params for calling Java function
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jstring prop = mJavaEnv->NewStringUTF(aProp);
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if (!prop)
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rv = NS_ERROR_OUT_OF_MEMORY;
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// Create method ID
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jmethodID mid = nsnull;
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if (NS_SUCCEEDED(rv)) {
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jclass clazz = mJavaEnv->GetObjectClass(mJavaLocProvider);
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if (clazz) {
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mid = mJavaEnv->GetMethodID(clazz, "getFiles",
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"(Ljava/lang/String;)[Ljava/io/File;");
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mJavaEnv->DeleteLocalRef(clazz);
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}
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if (!mid)
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rv = NS_ERROR_FAILURE;
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}
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// Call Java function
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jobject javaFileArray = nsnull;
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if (NS_SUCCEEDED(rv)) {
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javaFileArray = mJavaEnv->CallObjectMethod(mJavaLocProvider, mid, prop);
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// Handle any exception thrown by Java method.
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jthrowable exp = mJavaEnv->ExceptionOccurred();
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if (exp) {
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#ifdef DEBUG
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mJavaEnv->ExceptionDescribe();
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#endif
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// If the exception is an instance of XPCOMException, then get the
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// nsresult from the exception instance. Else, default to
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// NS_ERROR_FAILURE.
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if (mJavaEnv->IsInstanceOf(exp, xpcomExceptionClass)) {
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jfieldID fid;
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fid = mJavaEnv->GetFieldID(xpcomExceptionClass, "errorcode", "J");
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if (fid) {
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rv = mJavaEnv->GetLongField(exp, fid);
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} else {
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rv = NS_ERROR_FAILURE;
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}
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NS_ASSERTION(fid, "Couldn't get 'errorcode' field of XPCOMException");
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} else {
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rv = NS_ERROR_FAILURE;
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}
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} else {
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// No exception thrown. Check the result.
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if (javaFileArray == nsnull) {
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rv = NS_ERROR_FAILURE;
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}
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}
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}
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if (NS_SUCCEEDED(rv)) {
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// Parse return value
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*aResult = new DirectoryEnumerator(mJavaEnv,
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NS_STATIC_CAST(jobjectArray,
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javaFileArray));
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NS_ADDREF(*aResult);
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return NS_OK;
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}
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// Handle error conditions
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*aResult = nsnull;
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mJavaEnv->ExceptionClear();
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return rv;
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}
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