content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to you 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 org.apache.calcite.materialize;
  
  import org.apache.calcite.plan.RelOptTable;
  import org.apache.calcite.rel.type.RelDataTypeField;
  import org.apache.calcite.util.Util;
  
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  import static java.util.Objects.requireNonNull;
  
  /** Table registered in the graph. */
  public class LatticeTable {
    public final RelOptTable t;
    public final String alias;
  
    LatticeTable(RelOptTable table) {
      t = requireNonNull(table, "table");
      alias = requireNonNull(Util.last(table.getQualifiedName()));
    }
  
    @Override public int hashCode() {
      return t.getQualifiedName().hashCode();
    }
  
    @Override public boolean equals(@Nullable Object obj) {
      return this == obj
          || obj instanceof LatticeTable
          && t.getQualifiedName().equals(
              ((LatticeTable) obj).t.getQualifiedName());
    }
  
    @Override public String toString() {
      return t.getQualifiedName().toString();
    }
  
    RelDataTypeField field(int i) {
      return t.getRowType().getFieldList().get(i);
    }
  }
  