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Bug 281102 - Allow many Java proxies per XPCOM object. r=darin

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git-svn-id: svn://10.0.0.236/trunk@169791 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
pedemont%us.ibm.com
2005-02-24 21:53:46 +00:00
parent e3695895b7
commit adc22c6db9
11 changed files with 926 additions and 579 deletions
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152
mozilla/extensions/java/xpcom/nsJavaXPCOMBindingUtils.h
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@@ -43,9 +43,12 @@
#include "nsCOMPtr.h"
#include "nsString.h"
#include "pldhash.h"
#include "nsJavaXPTCStub.h"
#include "nsAutoLock.h"
//#define DEBUG_JAVAXPCOM
//#define DEBUG_JAVAXPCOM_REFCNT
#ifdef DEBUG_JAVAXPCOM
#define LOG(x) printf x
#else
@@ -62,6 +65,7 @@
/*********************
* Java JNI globals
*********************/
extern jclass booleanClass;
extern jclass charClass;
extern jclass byteClass;
@@ -101,11 +105,24 @@ extern jmethodID getNameMID;
extern jmethodID proxyToStringMID;
#endif
class nsJavaXPCOMBindings;
extern nsJavaXPCOMBindings* gBindings;
class NativeToJavaProxyMap;
extern NativeToJavaProxyMap* gNativeToJavaProxyMap;
class JavaToXPTCStubMap;
extern JavaToXPTCStubMap* gJavaToXPTCStubMap;
extern PRLock* gJavaXPCOMLock;
/**
* Initialize global structures used by Javaconnect.
* @param env Java environment pointer
* @return PR_TRUE if Javaconnect is initialized; PR_FALSE if an error occurred
*/
PRBool InitializeJavaGlobals(JNIEnv *env);
/**
* Frees global structures that were allocated by InitializeJavaGlobals().
* @param env Java environment pointer
*/
void FreeJavaGlobals(JNIEnv* env);
@@ -129,42 +146,125 @@ private:
/**************************************
* Java<->XPCOM binding stores
* Java<->XPCOM object mappings
**************************************/
// This class is used to store the associations between existing Java object
// and XPCOM objects.
class nsJavaXPCOMBindings
/**
* Maps native XPCOM objects to their associated Java proxy object.
*/
class NativeToJavaProxyMap
{
protected:
struct ProxyList
{
ProxyList(const jobject aRef, const nsIID& aIID, ProxyList* aList)
: javaObject(aRef)
, iid(aIID)
, next(aList)
{ }
const jobject javaObject;
const nsIID iid;
ProxyList* next;
};
struct Entry : public PLDHashEntryHdr
{
nsISupports* key;
ProxyList* list;
};
public:
nsJavaXPCOMBindings()
: mJAVAtoXPCOMBindings(nsnull)
, mXPCOMtoJAVABindings(nsnull)
NativeToJavaProxyMap()
: mHashTable(nsnull)
{ }
~nsJavaXPCOMBindings();
// Initializes internal structures.
NS_IMETHOD Init();
~NativeToJavaProxyMap();
// Associates the given Java object with the given XPCOM object
NS_IMETHOD AddBinding(JNIEnv* env, jobject aJavaStub, void* aXPCOMObject);
nsresult Init();
// Given either a Java object or XPCOM object, removes the association
// between the two.
NS_IMETHOD RemoveBinding(JNIEnv* env, jobject aJavaObject, void* aXPCOMObject);
nsresult Add(JNIEnv* env, nsISupports* aXPCOMObject, const nsIID& aIID,
jobject aProxy);
// Given a Java object, returns the associated XPCOM object.
void* GetXPCOMObject(JNIEnv* env, jobject aJavaObject);
nsresult Find(JNIEnv* env, nsISupports* aNativeObject, const nsIID& aIID,
jobject* aResult);
// Given an XPCOM object, returns the associated Java Object. If a Java
// object doesn't exist, then create a Java proxy for the XPCOM object.
NS_IMETHOD GetJavaObject(JNIEnv* env, void* aXPCOMObject, const nsIID& aIID,
PRBool aDoReleaseObject, jobject* aResult);
private:
PLDHashTable* mJAVAtoXPCOMBindings;
PLDHashTable* mXPCOMtoJAVABindings;
nsresult Remove(JNIEnv* env, nsISupports* aNativeObject, const nsIID& aIID);
protected:
PLDHashTable* mHashTable;
};
/**
* Maps Java objects to their associated nsJavaXPTCStub.
*/
class JavaToXPTCStubMap
{
protected:
struct Entry : public PLDHashEntryHdr
{
jint key;
nsJavaXPTCStub* xptcstub;
};
public:
JavaToXPTCStubMap()
: mHashTable(nsnull)
{ }
~JavaToXPTCStubMap();
nsresult Init();
nsresult Add(JNIEnv* env, jobject aJavaObject, nsJavaXPTCStub* aProxy);
nsresult Find(JNIEnv* env, jobject aJavaObject, const nsIID& aIID,
nsJavaXPTCStub** aResult);
nsresult Remove(JNIEnv* env, jobject aJavaObject);
protected:
PLDHashTable* mHashTable;
};
/*******************************
* Helper functions
*******************************/
/**
* Finds the associated Java object for the given XPCOM object and IID. If no
* such Java object exists, then it creates one.
*
* @param env Java environment pointer
* @param aXPCOMObject XPCOM object for which to find/create Java object
* @param aIID desired interface IID for Java object
* @param aResult on success, holds reference to Java object
* @param aIsNewProxy on success, holds PR_TRUE if aResult points to newlyXPTCStub;
* created Java proxy; PR_FALSE otherwise
*
* @return NS_OK if succeeded; all other return values are error codes.
*/
nsresult GetNewOrUsedJavaObject(JNIEnv* env, nsISupports* aXPCOMObject,
const nsIID& aIID, jobject* aResult,
PRBool* aIsNewProxy);
/**
* Finds the associated XPCOM object for the given Java object and IID. If no
* such XPCOM object exists, then it creates one.
*
* @param env Java environment pointer
* @param aJavaObject Java object for which to find/create XPCOM object
* @param aIID desired interface IID for XPCOM object
* @param aResult on success, holds AddRef'd reference to XPCOM object
* @param aIsXPTCStub on success, holds PR_TRUE if aResult points to XPTCStub;
* PR_FALSE if aResult points to native XPCOM object
*
* @return NS_OK if succeeded; all other return values are error codes.
*/
nsresult GetNewOrUsedXPCOMObject(JNIEnv* env, jobject aJavaObject,
const nsIID& aIID, nsISupports** aResult,
PRBool* aIsXPTCStub);
nsresult GetIIDForMethodParam(nsIInterfaceInfo *iinfo,
const nsXPTMethodInfo *methodInfo,