Crea una playlist in iTunes con COM e Java

Question

Come faccio a creare una playlist in iTunes da Java, usando COM (su Windows non AppleScript)?

ho trovato una libreria here che fa la maggior parte di quello che mi serve, e ho aggiunto un po 'di codice per ITPlaylist.java, chiamare il metodo "AddTrack" (citato in the docs) sull'oggetto ITPlaylist iTunes:

public void addTrack(ITTrack track) { 
    ITPlaylistKind k = getKind(); 
    if (k == ITPlaylistKindUser) { 
     Dispatch.put(object, "AddTrack", track); 
    } else 
     throw new UnsupportedOperationException("can only add track to user playlists - kind : " + k); 
} 

ma ottengo un errore:

# A fatal error has been detected by the Java Runtime Environment: 
# 
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x1000e150, pid=3184, tid=3896 
# 
# JRE version: 6.0_15-b03 
# Java VM: Java HotSpot(TM) Client VM (14.1-b02 mixed mode, sharing windows-x86) 
# Problematic frame: 
# C [jacob-1.14.3-x86.dll+0xe150] 
# 
# An error report file with more information is saved as: 
# Z:\\hs_err_pid3184.log 
# 
# If you would like to submit a bug report, please visit: 
# http://java.sun.com/webapps/bugreport/crash.jsp 
# The crash happened outside the Java Virtual Machine in native code. 
# See problematic frame for where to report the bug. 

quando provo e chiamare questo metodo. Il file di registro contiene:

# 
# A fatal error has been detected by the Java Runtime Environment: 
# 
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x1000e150, pid=3040, tid=3756 
# 
# JRE version: 6.0_15-b03 
# Java VM: Java HotSpot(TM) Client VM (14.1-b02 mixed mode, sharing windows-x86) 
# Problematic frame: 
# C [jacob-1.14.3-x86.dll+0xe150] 
# 
# If you would like to submit a bug report, please visit: 
# http://java.sun.com/webapps/bugreport/crash.jsp 
# The crash happened outside the Java Virtual Machine in native code. 
# See problematic frame for where to report the bug. 
# 

--------------- T H R E A D --------------- 

Current thread (0x01ed1400): JavaThread "main" [_thread_in_native, id=3756, stack(0x003b0000,0x00400000)] 

siginfo: ExceptionCode=0xc0000005, reading address 0x00000005 

Registers: 
EAX=0x00000000, EBX=0x0490f6f8, ECX=0x003ffd8c, EDX=0x240b14e8 
ESP=0x003ff9d0, EBP=0x003ffa14, ESI=0x01ed1510, EDI=0x00000005 
EIP=0x1000e150, EFLAGS=0x00010246 

Top of Stack: (sp=0x003ff9d0) 
0x003ff9d0: 01ed1400 28404d90 28404d90 01fd9e27 
0x003ff9e0: 01ed1510 003ffa28 003ffa24 01ed1400 
0x003ff9f0: 2840bbaf 003ff9f4 00000000 003ffa28 
0x003ffa00: 28409fb8 00000000 28404d90 00000000 
0x003ffa10: 003ffa24 003ffa4c 01fd2da1 00000000 
0x003ffa20: 01fd8259 240b14e8 240b39d8 003ffa2c 
0x003ffa30: 2840401a 003ffa58 28409fb8 00000000 
0x003ffa40: 28404040 003ffa24 003ffa54 003ffa7c 

Instructions: (pc=0x1000e150) 
0x1000e140: 1d 53 ff 15 20 01 01 10 66 c7 03 09 00 89 7b 08 
0x1000e150: 8b 0f 8b 51 04 57 ff d2 5f 5e 5b c2 0c 00 6a ff 


Stack: [0x003b0000,0x00400000], sp=0x003ff9d0, free space=318k 
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code) 
C [jacob-1.14.3-x86.dll+0xe150] 
j com.jacob.com.Variant.putObject(Ljava/lang/Object;)V+2 
j com.jacob.com.VariantUtilities.populateVariant(Lcom/jacob/com/Variant;Ljava/lang/Object;Z)V+511 
j com.jacob.com.VariantUtilities.objectToVariant(Ljava/lang/Object;)Lcom/jacob/com/Variant;+248 
j com.jacob.com.VariantUtilities.objectsToVariants([Ljava/lang/Object;)[Lcom/jacob/com/Variant;+19 
j com.jacob.com.Dispatch.invoke(Lcom/jacob/com/Dispatch;Ljava/lang/String;I[Ljava/lang/Object;[I)Lcom/jacob/com/Variant;+8 
j com.jacob.com.Dispatch.put(Lcom/jacob/com/Dispatch;Ljava/lang/String;Ljava/lang/Object;)V+18 
j com.dt.iTunesController.ITPlaylist.addTrack(Lcom/dt/iTunesController/ITTrack;)V+19 
j uk.co.teamnomad.itunes.WindowsLibraryImpl.savePlaylist(Ljava/util/List;Luk/co/teamnomad/itunes/PlayList;)V+46 
j uk.co.teamnomad.bpm.main.Main.<init>(Luk/co/teamnomad/bpm/system/OperatingSystem;)V+309 
j uk.co.teamnomad.bpm.main.Main.getInstance()Luk/co/teamnomad/bpm/main/Main;+16 
j uk.co.teamnomad.bpm.main.Main.main([Ljava/lang/String;)V+8 
v ~StubRoutines::call_stub 
V [jvm.dll+0xecfac] 
V [jvm.dll+0x1741d1] 
V [jvm.dll+0xed02d] 
V [jvm.dll+0xf5bf5] 
V [jvm.dll+0xfd84d] 
C [java.exe+0x2155] 
C [java.exe+0x82ce] 
C [kernel32.dll+0x44911] 
C [ntdll.dll+0x3e4b6] 
C [ntdll.dll+0x3e489] 

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code) 
j com.jacob.com.Variant.putVariantDispatch(Ljava/lang/Object;)V+0 
j com.jacob.com.Variant.putObject(Ljava/lang/Object;)V+2 
j com.jacob.com.VariantUtilities.populateVariant(Lcom/jacob/com/Variant;Ljava/lang/Object;Z)V+511 
j com.jacob.com.VariantUtilities.objectToVariant(Ljava/lang/Object;)Lcom/jacob/com/Variant;+248 
j com.jacob.com.VariantUtilities.objectsToVariants([Ljava/lang/Object;)[Lcom/jacob/com/Variant;+19 
j com.jacob.com.Dispatch.invoke(Lcom/jacob/com/Dispatch;Ljava/lang/String;I[Ljava/lang/Object;[I)Lcom/jacob/com/Variant;+8 
j com.jacob.com.Dispatch.put(Lcom/jacob/com/Dispatch;Ljava/lang/String;Ljava/lang/Object;)V+18 
j com.dt.iTunesController.ITPlaylist.addTrack(Lcom/dt/iTunesController/ITTrack;)V+19 
j uk.co.teamnomad.itunes.WindowsLibraryImpl.savePlaylist(Ljava/util/List;Luk/co/teamnomad/itunes/PlayList;)V+46 
j uk.co.teamnomad.bpm.main.Main.<init>(Luk/co/teamnomad/bpm/system/OperatingSystem;)V+309 
j uk.co.teamnomad.bpm.main.Main.getInstance()Luk/co/teamnomad/bpm/main/Main;+16 
j uk.co.teamnomad.bpm.main.Main.main([Ljava/lang/String;)V+8 
v ~StubRoutines::call_stub 

--------------- P R O C E S S --------------- 

Java Threads: (=> current thread) 
    0x043a4800 JavaThread "MerapiBridgeSocket" [_thread_in_native, id=3664, stack(0x04800000,0x04850000)] 
    0x01f4c800 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=2440, stack(0x04160000,0x041b0000)] 
    0x01f47c00 JavaThread "CompilerThread0" daemon [_thread_blocked, id=3628, stack(0x04110000,0x04160000)] 
    0x01f47400 JavaThread "Attach Listener" daemon [_thread_blocked, id=3584, stack(0x040c0000,0x04110000)] 
    0x01f3ac00 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=2968, stack(0x04070000,0x040c0000)] 
    0x01ef8c00 JavaThread "Finalizer" daemon [_thread_blocked, id=3724, stack(0x04020000,0x04070000)] 
    0x01ef7800 JavaThread "Reference Handler" daemon [_thread_blocked, id=3324, stack(0x03fd0000,0x04020000)] 
=>0x01ed1400 JavaThread "main" [_thread_in_native, id=3756, stack(0x003b0000,0x00400000)] 

Other Threads: 
    0x01ef6000 VMThread [stack: 0x01180000,0x011d0000] [id=2836] 
    0x01f5f000 WatcherThread [stack: 0x041b0000,0x04200000] [id=3528] 

VM state:not at safepoint (normal execution) 

VM Mutex/Monitor currently owned by a thread: None 

Heap 
def new generation total 960K, used 794K [0x24000000, 0x24100000, 0x244e0000) 
    eden space 896K, 81% used [0x24000000, 0x240b7510, 0x240e0000) 
    from space 64K, 95% used [0x240f0000, 0x240ff450, 0x24100000) 
    to space 64K, 0% used [0x240e0000, 0x240e0000, 0x240f0000) 
tenured generation total 4096K, used 876K [0x244e0000, 0x248e0000, 0x28000000) 
    the space 4096K, 21% used [0x244e0000, 0x245bb318, 0x245bb400, 0x248e0000) 
compacting perm gen total 12288K, used 4255K [0x28000000, 0x28c00000, 0x2c000000) 
    the space 12288K, 34% used [0x28000000, 0x28427cb8, 0x28427e00, 0x28c00000) 
    ro space 8192K, 63% used [0x2c000000, 0x2c519920, 0x2c519a00, 0x2c800000) 
    rw space 12288K, 53% used [0x2c800000, 0x2ce74dd0, 0x2ce74e00, 0x2d400000) 

Dynamic libraries: 
0x00400000 - 0x00424000  C:\Windows\system32\java.exe 
0x771a0000 - 0x772c7000  C:\Windows\system32\ntdll.dll 
0x75a20000 - 0x75afb000  C:\Windows\system32\kernel32.dll 
0x75ee0000 - 0x75fa6000  C:\Windows\system32\ADVAPI32.dll 
0x772e0000 - 0x773a3000  C:\Windows\system32\RPCRT4.dll 
0x7c340000 - 0x7c396000  C:\Program Files\Java\jre6\bin\msvcr71.dll 
0x6d800000 - 0x6da8b000  C:\Program Files\Java\jre6\bin\client\jvm.dll 
0x77060000 - 0x770fd000  C:\Windows\system32\USER32.dll 
0x773b0000 - 0x773fb000  C:\Windows\system32\GDI32.dll 
0x744f0000 - 0x74522000  C:\Windows\system32\WINMM.dll 
0x76f30000 - 0x76fda000  C:\Windows\system32\msvcrt.dll 
0x76d20000 - 0x76e64000  C:\Windows\system32\ole32.dll 
0x75d20000 - 0x75dad000  C:\Windows\system32\OLEAUT32.dll 
0x744b0000 - 0x744e9000  C:\Windows\system32\OLEACC.dll 
0x77100000 - 0x7711e000  C:\Windows\system32\IMM32.DLL 
0x76c00000 - 0x76cc8000  C:\Windows\system32\MSCTF.dll 
0x75820000 - 0x7584c000  C:\Windows\system32\apphelp.dll 
0x772d0000 - 0x772d9000  C:\Windows\system32\LPK.DLL 
0x77120000 - 0x7719d000  C:\Windows\system32\USP10.dll 
0x6d7b0000 - 0x6d7bc000  C:\Program Files\Java\jre6\bin\verify.dll 
0x6d330000 - 0x6d34f000  C:\Program Files\Java\jre6\bin\java.dll 
0x6d290000 - 0x6d298000  C:\Program Files\Java\jre6\bin\hpi.dll 
0x75a10000 - 0x75a17000  C:\Windows\system32\PSAPI.DLL 
0x6d7f0000 - 0x6d7ff000  C:\Program Files\Java\jre6\bin\zip.dll 
0x6d610000 - 0x6d623000  C:\Program Files\Java\jre6\bin\net.dll 
0x76e70000 - 0x76e9d000  C:\Windows\system32\WS2_32.dll 
0x75fb0000 - 0x75fb6000  C:\Windows\system32\NSI.dll 
0x75030000 - 0x7506b000  C:\Windows\system32\mswsock.dll 
0x75090000 - 0x75095000  C:\Windows\System32\wship6.dll 
0x74cf0000 - 0x74cf5000  C:\Windows\System32\wshtcpip.dll 
0x10000000 - 0x10019000  C:\Windows\System32\jacob-1.14.3-x86.dll 
0x72640000 - 0x726db000  C:\Windows\WinSxS\x86_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.1434_none_d08b6002442c891f\MSVCR80.dll 
0x76ea0000 - 0x76f24000  C:\Windows\system32\CLBCatQ.DLL 
0x74db0000 - 0x74deb000  C:\Windows\system32\rsaenh.dll 

VM Arguments: 
java_command: bpm-0.0.13-jar-with-dependencies.jar 
Launcher Type: SUN_STANDARD 

Environment Variables: 
CLASSPATH=.;C:\Program Files\QuickTime\QTSystem\QTJava.zip 
PATH=C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program Files\QuickTime\QTSystem\ 
USERNAME=ed 
OS=Windows_NT 
PROCESSOR_IDENTIFIER=x86 Family 6 Model 23 Stepping 6, GenuineIntel 



--------------- S Y S T E M --------------- 

OS: Windows Vista Build 6001 Service Pack 1 

CPU:total 1 (2 cores per cpu, 1 threads per core) family 6 model 23 stepping 6, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3, sse4.1 

Memory: 4k page, physical 2097151k(1656488k free), swap 4194303k(4092420k free) 

vm_info: Java HotSpot(TM) Client VM (14.1-b02) for windows-x86 JRE (1.6.0_15-b03), built on Jul 25 2009 01:22:46 by "java_re" with MS VC++ 7.1 

time: Mon Aug 31 20:14:48 2009 
elapsed time: 7 seconds 

Cosa sto facendo male?

Answer 1

La risposta per me è stato contattare lo sviluppatore della libreria che stavo usando, facendogli rilasciare una nuova versione della libreria. Se si desidera eseguire questa operazione, utilizzare almeno la versione 0.2, che distingua correttamente tra gli oggetti ITPlaylist e quelli ITUserPlaylist, che (come menzionato da lurkingfridge79 sono gli unici tipi di playlist che possono contenere tracce aggiunte dall'API COM.

Answer 2

Non ho fatto alcun materiale iTunes in Java per un po ', ma da quale esperienza ho ricordato che l'interfaccia può essere piuttosto volubile.

Non ho una risposta definitiva, ma nel tentativo di fornire almeno uno scatto al buio, forse dovresti provare a trasmettere l'ITPlaylist con cui stai lavorando a una ITUserPlaylist (se è il tipo corretto, ovviamente) e quindi chiamando il suo metodo addTrack. In questo modo useresti la funzione fornita dalla libreria e, se ciò non dovesse funzionare, potrai metterti in contatto con lo sviluppatore perché potrebbe esserci un problema più serio.

Dal dump fornito, sembra che la C sottostante in JACOB stia cercando di modificare l'ITPlaylist equivalente tramite l'interfaccia COM di iTunes. Questo potrebbe essere dovuto al modo in cui funziona l'eredità? IE: ITPlaylist non supporta addTrack (il C sottostante sta tentando di chiamare una funzione inesistente) ma ITUserPlaylist lo fa? Solo un pensiero.

consigliata la correzione:

public void addTrack(ITTrack track) { 
    ITPlaylistKind k = getKind(); 
    if (k == ITPlaylistKindUser) { 
     Dispatch.put(((ITUserPlaylist)this).object, "AddTrack", track); 
    } else 
     throw new UnsupportedOperationException("can only add track to user playlists - kind : " + k); 
} 

Anche in questo caso io non sono certamente l'esperto qui quindi se qualcuno ha un'idea migliore, si prega di andare avanti e post su di me :)

fatemi sapere se che le offerte hai qualche successo!

Modifica dopo aver riletto il mio post, mi sono reso conto ho dimenticato questo approccio, che potrebbe essere forse meglio in quanto mantiene il ponte JACOB COM fuori la roba più alto livello:

((ITUserPlaylist)this).addTrack(track);