Examples of GraphWalker

    // context along
    UnionProcContext uCtx = new UnionProcContext();
    uCtx.setParseContext(pCtx);
    Dispatcher disp = new DefaultRuleDispatcher(UnionProcFactory.getNoUnion(),
        opRules, uCtx);
    GraphWalker ogw = new PreOrderWalker(disp);


    // Create a list of topop nodes
    ArrayList<Node> topNodes = new ArrayList<Node>();
    topNodes.addAll(pCtx.getTopOps().values());
    ogw.startWalking(topNodes, null);
    pCtx.setUCtx(uCtx);


    // Walk the tree again to see if the union can be removed completely
    HiveConf conf = pCtx.getConf();
    opRules.clear();
    if (conf.getBoolVar(HiveConf.ConfVars.HIVE_OPTIMIZE_UNION_REMOVE)) {


      if (!conf.getBoolVar(HiveConf.ConfVars.HIVE_HADOOP_SUPPORTS_SUBDIRECTORIES)) {
        throw new
        SemanticException(ErrorMsg.HIVE_UNION_REMOVE_OPTIMIZATION_NEEDS_SUBDIRECTORIES.getMsg());
      }


      opRules.put(new RuleRegExp("R5", UnionOperator.getOperatorName() + "%" +
                                 ".*" + FileSinkOperator.getOperatorName() + "%"),
        UnionProcFactory.getUnionNoProcessFile());


      disp = new DefaultRuleDispatcher(UnionProcFactory.getNoUnion(), opRules, uCtx);
      ogw = new PreOrderWalker(disp);


      // Create a list of topop nodes
      topNodes.clear();
      topNodes.addAll(pCtx.getTopOps().values());
      ogw.startWalking(topNodes, null);
    }


    return pCtx;
  }

    final Walk walk = new Walk();
    
    NoBifurcationIterator iterator = new NoBifurcationIterator();
    iterator.setSource(ends[0]);
    
    GraphWalker walker = new GraphWalker() {
      public int visit(Graphable element, GraphTraversal traversal) {
        walk.add(element);
        return(GraphTraversal.CONTINUE);
      }

Examples of GraphWalker

Examples of org.apache.hadoop.hive.ql.lib.GraphWalker

Examples of org.geotools.graph.traverse.GraphWalker