65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2004, University in Hagen, Department of Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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//paragraph [1] Title: [{\large\bf ] [}]
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[1] JVMInitializer
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\begin{center}
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Last Change: May 2004
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\end{center}
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Algebras written in Java use JNI to call the
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Java methods from C/C++. To realize that it is
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needed to provide a Java Virtual Maschine
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(JVM for short). All Code has to use the same
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JVM. It is not possible to use several instances
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of the JVM in a single program. Each code which
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want to use JNI has to create a JVMInitializer.
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The first call of the constructor creates the Java
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environment. The file JNI.ini is readed for
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initialization of the JVM. After this, the constructor
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will make nothing when it called.
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*/
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#ifndef JVMINIT_H
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#define JVMINIT_H
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#include <jni.h>
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class JVMInitializer {
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public:
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JVMInitializer();
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JNIEnv *getEnv();
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JavaVM *getJVM();
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bool isInitialized();
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private:
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static bool initialized;
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static JNIEnv* env;
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static JavaVM* jvm;
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};
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#endif
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