G(arbage) C(ollected) X(Query) Engine: whereexpression.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 WHEREEXPRESSION_H
00036 #define WHEREEXPRESSION_H
00037 
00038 #include "expression.h"
00039 #include "ifexpression.h"
00040 #include "emptyexpression.h"
00041 
00053 class WhereExpression:public Expression {
00054 
00055   public:
00061     WhereExpression(CondExpression * _cond, Expression * _exp);
00062 
00066     virtual ~ WhereExpression();
00067 
00071     virtual void scopeCheck(vector < unsigned >&def_vars,
00072                             vector < unsigned >&introduced_vars,
00073                             vector < unsigned >&violating_vars);
00074 
00078     virtual void replaceVarId(unsigned old_id, unsigned new_id);
00079 
00083     virtual void mergeSequences();
00084 
00088     virtual void extractFSAMap(FSAMap * fsamap, unsigned parent_var);
00089 
00093     virtual void extractParVarMap(ParVarMap * parvarmap);
00094 
00098     virtual void extractDependencies(vector < DependencySet * >*depset);
00099 
00103     virtual Expression *placeSignOffs(vector < SignOffExpression * >&signoffs);
00104 
00108     virtual void rewriteWhereExps();
00109 
00113     virtual void rewriteEmptyFuncts();
00114 
00118     virtual void rewriteVarstepCondExps();
00119 
00123     virtual void rewriteAggregateFuncts();
00124 
00128     virtual void rewriteVarsteps();
00129 
00133     virtual void print(OutputStream & dos) const;
00134 
00138     virtual void init(BufferNode * root);
00139 
00143     virtual void eval(OutputStream & eos, Environment * env, unsigned modus);
00144 
00148     virtual bool containsDirectOutput();
00149 
00150   private:
00156      CondExpression * cond;
00157 
00163     Expression *exp;
00164 
00172     IfExpression *ifexp;
00173 };
00174 
00175 #endif // WHEREEXPRESSION_H