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Diffstat (limited to 'stoc/source/javaloader/javaloader.cxx')
| -rw-r--r-- | stoc/source/javaloader/javaloader.cxx | 372 |
1 files changed, 372 insertions, 0 deletions
diff --git a/stoc/source/javaloader/javaloader.cxx b/stoc/source/javaloader/javaloader.cxx new file mode 100644 index 000000000..d6f77cd2b --- /dev/null +++ b/stoc/source/javaloader/javaloader.cxx @@ -0,0 +1,372 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 . + */ + +#include <rtl/process.h> +#include <sal/log.hxx> + +#include <uno/environment.h> +#include <uno/lbnames.h> +#include <uno/mapping.hxx> +#include <com/sun/star/uno/RuntimeException.hpp> +#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp> +#include <cppuhelper/exc_hlp.hxx> +#include <tools/diagnose_ex.h> + +#ifdef LINUX +#undef minor +#undef major +#endif + +#include <com/sun/star/java/XJavaVM.hpp> + +#include <jni.h> + +#include <cppuhelper/factory.hxx> +#include <cppuhelper/implementationentry.hxx> + +#include <cppuhelper/implbase.hxx> +#include <cppuhelper/supportsservice.hxx> + +#include <com/sun/star/loader/XImplementationLoader.hpp> +#include <com/sun/star/lang/XServiceInfo.hpp> +#include <com/sun/star/lang/XInitialization.hpp> +#include <com/sun/star/uno/XComponentContext.hpp> + +#include <jvmaccess/unovirtualmachine.hxx> +#include <jvmaccess/virtualmachine.hxx> + +namespace com::sun::star::registry { class XRegistryKey; } + +using namespace css::java; +using namespace css::lang; +using namespace css::loader; +using namespace css::uno; +using namespace css::registry; + +using namespace ::cppu; +using namespace ::osl; + +namespace stoc_javaloader { + +static Mutex & getInitMutex(); + +static Sequence< OUString > loader_getSupportedServiceNames() +{ + return { "com.sun.star.loader.Java", "com.sun.star.loader.Java2" }; +} + +static OUString loader_getImplementationName() +{ + return "com.sun.star.comp.stoc.JavaComponentLoader"; +} + +namespace { + +class JavaComponentLoader : public WeakImplHelper<XImplementationLoader, XServiceInfo> +{ + css::uno::Reference<XComponentContext> m_xComponentContext; + /** Do not use m_javaLoader directly. Instead use getJavaLoader. + */ + css::uno::Reference<XImplementationLoader> m_javaLoader; + /** The returned Reference contains a null pointer if the office is not configured + to run java. + + @exception css::uno::RuntimeException + If the Java implementation of the loader could not be obtained, for reasons other + then that java was not configured the RuntimeException is thrown. + */ + const css::uno::Reference<XImplementationLoader> & getJavaLoader(); + + +public: + /// @throws RuntimeException + explicit JavaComponentLoader(const css::uno::Reference<XComponentContext> & xCtx); + +public: + // XServiceInfo + virtual OUString SAL_CALL getImplementationName() override; + virtual sal_Bool SAL_CALL supportsService(const OUString& ServiceName) override; + virtual Sequence<OUString> SAL_CALL getSupportedServiceNames() override; + + // XImplementationLoader + virtual css::uno::Reference<XInterface> SAL_CALL activate( + const OUString& implementationName, const OUString& implementationLoaderUrl, + const OUString& locationUrl, const css::uno::Reference<XRegistryKey>& xKey) override; + virtual sal_Bool SAL_CALL writeRegistryInfo( + const css::uno::Reference<XRegistryKey>& xKey, + const OUString& implementationLoaderUrl, const OUString& locationUrl) override; +}; + +} + +const css::uno::Reference<XImplementationLoader> & JavaComponentLoader::getJavaLoader() +{ + MutexGuard aGuard(getInitMutex()); + + if (m_javaLoader.is()) + return m_javaLoader; + + uno_Environment * pJava_environment = nullptr; + uno_Environment * pUno_environment = nullptr; + typelib_InterfaceTypeDescription * pType_XImplementationLoader = nullptr; + + try { + // get a java vm, where we can create a loader + css::uno::Reference<XJavaVM> javaVM_xJavaVM( + m_xComponentContext->getValueByName( + ("/singletons/" + "com.sun.star.java.theJavaVirtualMachine")), + UNO_QUERY_THROW); + + // Use the special protocol of XJavaVM.getJavaVM: If the passed in + // process ID has an extra 17th byte of value one, the returned any + // contains a pointer to a jvmaccess::UnoVirtualMachine, instead of the + // underlying JavaVM pointer: + Sequence<sal_Int8> processID(17); + rtl_getGlobalProcessId(reinterpret_cast<sal_uInt8 *>(processID.getArray())); + processID[16] = 1; + + // We get a non-refcounted pointer to a jvmaccess::UnoVirtualMachine + // from the XJavaVM service (the pointer is guaranteed to be valid + // as long as our reference to the XJavaVM service lasts), and + // convert the non-refcounted pointer into a refcounted one + // immediately: + static_assert(sizeof (sal_Int64) + >= sizeof (jvmaccess::UnoVirtualMachine *), "must be at least the same size"); + sal_Int64 nPointer = reinterpret_cast< sal_Int64 >( + static_cast< jvmaccess::UnoVirtualMachine * >(nullptr)); + javaVM_xJavaVM->getJavaVM(processID) >>= nPointer; + rtl::Reference< jvmaccess::UnoVirtualMachine > xVirtualMachine( + reinterpret_cast< jvmaccess::UnoVirtualMachine * >(nPointer)); + if (!xVirtualMachine.is()) + { + //throw RuntimeException( + // "javaloader error - JavaVirtualMachine service could not provide a VM", + // css::uno::Reference<XInterface>()); + // We must not throw a RuntimeException, because this might end the applications. + // It is ok if java components + // are not working because the office can be installed without Java support. + SAL_WARN("stoc", "getJavaVM returned null"); + return m_javaLoader; // null-ref + } + + try + { + jvmaccess::VirtualMachine::AttachGuard aGuard2( + xVirtualMachine->getVirtualMachine()); + JNIEnv * pJNIEnv = aGuard2.getEnvironment(); + + // instantiate the java JavaLoader + jclass jcClassLoader = pJNIEnv->FindClass("java/lang/ClassLoader"); + if(pJNIEnv->ExceptionOccurred()) + throw RuntimeException( + "javaloader error - could not find class java/lang/ClassLoader"); + jmethodID jmLoadClass = pJNIEnv->GetMethodID( + jcClassLoader, "loadClass", + "(Ljava/lang/String;)Ljava/lang/Class;"); + if(pJNIEnv->ExceptionOccurred()) + throw RuntimeException( + "javaloader error - could not find method java/lang/ClassLoader.loadClass"); + jvalue arg; + arg.l = pJNIEnv->NewStringUTF( + "com.sun.star.comp.loader.JavaLoader"); + if(pJNIEnv->ExceptionOccurred()) + throw RuntimeException( + "javaloader error - could not create string"); + jclass jcJavaLoader = static_cast< jclass >( + pJNIEnv->CallObjectMethodA( + static_cast< jobject >(xVirtualMachine->getClassLoader()), + jmLoadClass, &arg)); + if(pJNIEnv->ExceptionOccurred()) + throw RuntimeException( + "javaloader error - could not find class com/sun/star/comp/loader/JavaLoader"); + jmethodID jmJavaLoader_init = pJNIEnv->GetMethodID(jcJavaLoader, "<init>", "()V"); + if(pJNIEnv->ExceptionOccurred()) + throw RuntimeException( + "javaloader error - instantiation of com.sun.star.comp.loader.JavaLoader failed"); + jobject joJavaLoader = pJNIEnv->NewObject(jcJavaLoader, jmJavaLoader_init); + if(pJNIEnv->ExceptionOccurred()) + throw RuntimeException( + "javaloader error - instantiation of com.sun.star.comp.loader.JavaLoader failed"); + + // map the java JavaLoader to this environment + OUString sJava("java"); + uno_getEnvironment(&pJava_environment, sJava.pData, + xVirtualMachine.get()); + if(!pJava_environment) + throw RuntimeException( + "javaloader error - no Java environment available"); + + // why is there no convenient constructor? + OUString sCppu_current_lb_name(CPPU_CURRENT_LANGUAGE_BINDING_NAME); + uno_getEnvironment(&pUno_environment, sCppu_current_lb_name.pData, nullptr); + if(!pUno_environment) + throw RuntimeException( + "javaloader error - no C++ environment available"); + + Mapping java_curr(pJava_environment, pUno_environment); + if(!java_curr.is()) + throw RuntimeException( + "javaloader error - no mapping from java to C++ "); + + // release java environment + pJava_environment->release(pJava_environment); + pJava_environment = nullptr; + + // release uno environment + pUno_environment->release(pUno_environment); + pUno_environment = nullptr; + + cppu::UnoType<XImplementationLoader>::get(). + getDescription(reinterpret_cast<typelib_TypeDescription **>(&pType_XImplementationLoader)); + if(!pType_XImplementationLoader) + throw RuntimeException( + "javaloader error - no type information for XImplementationLoader"); + + m_javaLoader.set(static_cast<XImplementationLoader *>(java_curr.mapInterface(joJavaLoader, pType_XImplementationLoader))); + pJNIEnv->DeleteLocalRef( joJavaLoader ); + if(!m_javaLoader.is()) + throw RuntimeException( + "javaloader error - mapping of java XImplementationLoader to c++ failed"); + + typelib_typedescription_release(reinterpret_cast<typelib_TypeDescription *>(pType_XImplementationLoader)); + pType_XImplementationLoader = nullptr; + } + catch (jvmaccess::VirtualMachine::AttachGuard::CreationException &) + { + css::uno::Any anyEx = cppu::getCaughtException(); + throw css::lang::WrappedTargetRuntimeException( + "jvmaccess::VirtualMachine::AttachGuard::CreationException", + static_cast< cppu::OWeakObject * >(this), anyEx ); + } + + // set the service manager at the javaloader + css::uno::Reference<XInitialization> javaLoader_XInitialization(m_javaLoader, UNO_QUERY_THROW); + + Any any; + any <<= m_xComponentContext->getServiceManager(); + + javaLoader_XInitialization->initialize(Sequence<Any>(&any, 1)); + } + catch(RuntimeException &) { + if(pJava_environment) + pJava_environment->release(pJava_environment); + + if(pUno_environment) + pUno_environment->release(pUno_environment); + + if(pType_XImplementationLoader) + typelib_typedescription_release( + reinterpret_cast<typelib_TypeDescription *>(pType_XImplementationLoader)); + throw; + } + SAL_INFO("stoc", "javaloader.cxx: mapped javaloader - 0x" << m_javaLoader.get()); + return m_javaLoader; +} + +JavaComponentLoader::JavaComponentLoader(const css::uno::Reference<XComponentContext> & xCtx) : + m_xComponentContext(xCtx) + +{ + +} + +// XServiceInfo +OUString SAL_CALL JavaComponentLoader::getImplementationName() +{ + return loader_getImplementationName(); +} + +sal_Bool SAL_CALL JavaComponentLoader::supportsService(const OUString & ServiceName) +{ + return cppu::supportsService(this, ServiceName); +} + +Sequence<OUString> SAL_CALL JavaComponentLoader::getSupportedServiceNames() +{ + return loader_getSupportedServiceNames(); +} + + +// XImplementationLoader +sal_Bool SAL_CALL JavaComponentLoader::writeRegistryInfo( + const css::uno::Reference<XRegistryKey> & xKey, const OUString & blabla, + const OUString & rLibName) +{ + const css::uno::Reference<XImplementationLoader> & loader = getJavaLoader(); + if (!loader.is()) + throw CannotRegisterImplementationException("Could not create Java implementation loader"); + return loader->writeRegistryInfo(xKey, blabla, rLibName); +} + + +css::uno::Reference<XInterface> SAL_CALL JavaComponentLoader::activate( + const OUString & rImplName, const OUString & blabla, const OUString & rLibName, + const css::uno::Reference<XRegistryKey> & xKey) +{ + const css::uno::Reference<XImplementationLoader> & loader = getJavaLoader(); + if (!loader.is()) + throw CannotActivateFactoryException("Could not create Java implementation loader"); + return loader->activate(rImplName, blabla, rLibName, xKey); +} + +static Mutex & getInitMutex() +{ + static Mutex ourMutex; + + return ourMutex; +} + +/// @throws Exception +static css::uno::Reference<XInterface> JavaComponentLoader_CreateInstance(const css::uno::Reference<XComponentContext> & xCtx) +{ + try { + return *new JavaComponentLoader(xCtx); + } + catch(const RuntimeException &) { + TOOLS_INFO_EXCEPTION("stoc", "could not init javaloader"); + throw; + } +} + +} //end namespace + + +using namespace stoc_javaloader; + +static const struct ImplementationEntry g_entries[] = +{ + { + JavaComponentLoader_CreateInstance, loader_getImplementationName, + loader_getSupportedServiceNames, createOneInstanceComponentFactory, + nullptr , 0 + }, + { nullptr, nullptr, nullptr, nullptr, nullptr, 0 } +}; + +extern "C" +{ +SAL_DLLPUBLIC_EXPORT void * javaloader_component_getFactory( + const char * pImplName, void * pServiceManager, void * pRegistryKey ) +{ + return component_getFactoryHelper( pImplName, pServiceManager, pRegistryKey , g_entries ); +} +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |