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.adapter.java;
  
  import org.apache.calcite.linq4j.tree.Expression;
  import org.apache.calcite.schema.QueryableTable;
  import org.apache.calcite.schema.SchemaPlus;
  import org.apache.calcite.schema.Schemas;
  import org.apache.calcite.schema.impl.AbstractTable;
  
  import java.lang.reflect.Type;
  
  /**
   * Abstract base class for implementing {@link org.apache.calcite.schema.Table}.
   */
  public abstract class AbstractQueryableTable extends AbstractTable
      implements QueryableTable {
    protected final Type elementType;
  
    protected AbstractQueryableTable(Type elementType) {
      super();
      this.elementType = elementType;
    }
  
    @Override public Type getElementType() {
      return elementType;
    }
  
    @Override public Expression getExpression(SchemaPlus schema, String tableName,
        Class clazz) {
      return Schemas.tableExpression(schema, elementType, tableName, clazz);
    }
  }
  