| /************************************************************** |
| * |
| * 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 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| #ifndef CONNECTIVITY_LOCALREF_HXX |
| #define CONNECTIVITY_LOCALREF_HXX |
| |
| /** === begin UNO includes === **/ |
| /** === end UNO includes === **/ |
| |
| #include <jvmaccess/virtualmachine.hxx> |
| |
| //........................................................................ |
| namespace connectivity { namespace jdbc |
| { |
| //........................................................................ |
| |
| //==================================================================== |
| //= LocalRef |
| //==================================================================== |
| /** helper class to hold a local ref to a JNI object |
| |
| Note that this class never actually calls NewLocalRef. It is assumed that all objects |
| passed are already acquired with a local ref (as it usually is the case if you obtain |
| the object from an JNI method). |
| */ |
| template< typename T > |
| class LocalRef |
| { |
| public: |
| explicit LocalRef( JNIEnv& environment ) |
| :m_environment( environment ) |
| ,m_object( NULL ) |
| { |
| } |
| |
| LocalRef( JNIEnv& environment, T object ) |
| :m_environment( environment ) |
| ,m_object( object ) |
| { |
| } |
| |
| ~LocalRef() |
| { |
| reset(); |
| } |
| |
| T release() |
| { |
| T t = m_object; |
| m_object = NULL; |
| return t; |
| } |
| |
| void set( T object ) { reset(); m_object = object; } |
| |
| void reset() |
| { |
| if ( m_object != NULL ) |
| { |
| m_environment.DeleteLocalRef( m_object ); |
| m_object = NULL; |
| } |
| } |
| |
| JNIEnv& env() const { return m_environment; } |
| T get() const { return m_object; } |
| bool is() const { return m_object != NULL; } |
| |
| private: |
| LocalRef(LocalRef &); // not defined |
| void operator =(LocalRef &); // not defined |
| |
| protected: |
| JNIEnv& m_environment; |
| T m_object; |
| }; |
| |
| //........................................................................ |
| } } // namespace connectivity::jdbc |
| //........................................................................ |
| |
| #endif // CONNECTIVITY_LOCALREF_HXX |