content: /*
   * Copyright 2020 Alibaba Group Holding Limited.
   *
   * Licensed 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.
   */
  
  package com.alibaba.graphscope.common.ir.rel;
  
  import com.alibaba.graphscope.common.ir.rel.metadata.glogue.pattern.Pattern;
  
  import org.apache.calcite.plan.RelOptCluster;
  import org.apache.calcite.plan.RelTraitSet;
  import org.apache.calcite.rel.AbstractRelNode;
  import org.apache.calcite.rel.RelNode;
  import org.apache.calcite.rel.RelShuttle;
  import org.apache.calcite.rel.RelWriter;
  import org.apache.calcite.rel.type.RelDataType;
  import org.apache.calcite.sql.type.SqlTypeName;
  
  public class GraphPattern extends AbstractRelNode {
      private final Pattern pattern;
      private double rowCount = 0.0d;
  
      public GraphPattern(RelOptCluster cluster, RelTraitSet traitSet, Pattern pattern) {
          super(cluster, traitSet);
          this.pattern = pattern;
          recomputeDigest();
      }
  
      public Pattern getPattern() {
          return pattern;
      }
  
      @Override
      public RelDataType deriveRowType() {
          return getCluster().getTypeFactory().createSqlType(SqlTypeName.ANY);
      }
  
      @Override
      public RelNode accept(RelShuttle shuttle) {
          if (shuttle instanceof GraphShuttle) {
              return ((GraphShuttle) shuttle).visit(this);
          }
          return super.accept(shuttle);
      }
  
      @Override
      public RelWriter explainTerms(RelWriter pw) {
          return super.explainTerms(pw).item("pattern", pattern);
      }
  
      public void setRowCount(double rowCount) {
          this.rowCount = rowCount;
      }
  
      public double getRowCount() {
          return rowCount;
      }
  }
  