TurtleDB
A mini distributed database system
src/ca/uqac/dim/turtledb/ReadyToProcessVisitor.java
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00001 /*-------------------------------------------------------------------------
00002     Simple distributed database engine
00003     Copyright (C) 2012  Sylvain Hallé
00004 
00005     This program is free software: you can redistribute it and/or modify
00006     it under the terms of the GNU General Public License as published by
00007     the Free Software Foundation, either version 3 of the License, or
00008     (at your option) any later version.
00009 
00010     This program is distributed in the hope that it will be useful,
00011     but WITHOUT ANY WARRANTY; without even the implied warranty of
00012     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013     GNU General Public License for more details.
00014 
00015     You should have received a copy of the GNU General Public License
00016     along with this program.  If not, see <http://www.gnu.org/licenses/>.
00017  -------------------------------------------------------------------------*/
00018 package ca.uqac.dim.turtledb;
00019 
00027 public class ReadyToProcessVisitor extends EmptyQueryVisitor
00028 { 
00029   protected boolean m_hasNonTableLeaf = false;
00030   
00035   public boolean isReady()
00036   {
00037     return !m_hasNonTableLeaf;
00038   }
00039   
00040   @Override
00041   public void visit(VariableTable t)
00042   {
00043     if (t.isLeaf())
00044       m_hasNonTableLeaf = true;
00045   }
00046 }