G(arbage) C(ollected) X(Query) Engine: varstepcondexpression.h Source File

00001 
00002 /*
00003  | Author: Michael Schmidt;
00004  |         Gunnar Jehl 
00005  |
00006  | ************************* SOFTWARE LICENSE AGREEMENT ***********************
00007  | This source code is published under the BSD License.
00008  |
00009  | See file 'LICENSE.txt' that comes with this distribution or
00010  | http://dbis.informatik.uni-freiburg.de/index.php?project=GCX/license.php
00011  | for the full license agreement.
00012  |
00013  | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00014  | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00015  | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00016  | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
00017  | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00018  | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00019  | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00020  | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00021  | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00022  | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00023  | POSSIBILITY OF SUCH DAMAGE.
00024  | ****************************************************************************
00025 */
00026 
00035 #ifndef VARSTEPCONDEXPRESSION_H
00036 #define VARSTEPCONDEXPRESSION_H
00037 
00038 #include "condexpression.h"
00039 #include "varstepexpression.h"
00040 #include "existscondexpression.h"
00041 
00056 class VarstepCondExpression:public CondExpression {
00057 
00058   public:
00063     VarstepCondExpression(VarExpression * _var);
00064 
00069     VarstepCondExpression(VarStepExpression * _varstep);
00070 
00074     virtual ~ VarstepCondExpression();
00075 
00079     virtual void scopeCheck(vector < unsigned >&def_vars,
00080                             vector < unsigned >&introduced_vars,
00081                             vector < unsigned >&violating_vars);
00082 
00086     virtual void replaceVarId(unsigned old_id, unsigned new_id);
00087 
00091     virtual void extractDependencies(vector < DependencySet * >*depset);
00092 
00096     void rewriteVarstepCondExps();
00097 
00101     virtual void print(OutputStream & dos) const;
00102 
00106     virtual void init(BufferNode * root);
00107 
00111     virtual bool evalCond(OutputStream & eos, Environment * env,
00112                           unsigned modus);
00113 
00114   private:
00120      VarExpression * var;
00121 
00127     VarStepExpression *varstep;
00128 
00136     ExistsCondExpression *econd;
00137 };
00138 
00139 #endif // VARSTEPCONDEXPRESSION_H