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/*
 * 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 com.hazelcast.org.apache.calcite.sql.validate;

import com.hazelcast.org.apache.calcite.rel.type.RelDataType;
import com.hazelcast.org.apache.calcite.rel.type.RelDataTypeFactory;
import com.hazelcast.org.apache.calcite.sql.SqlNode;
import com.hazelcast.org.apache.calcite.util.Util;

import com.hazelcast.com.google.common.collect.ImmutableList;

import com.hazelcast.org.checkerframework.checker.nullness.qual.Nullable;

import java.util.List;
import java.util.Objects;

import static java.util.Objects.requireNonNull;

/** Namespace based on a schema.
 *
 * The visible names are tables and sub-schemas.
 */
class SchemaNamespace extends AbstractNamespace {
  /** The path of this schema. */
  private final ImmutableList names;

  /** Creates a SchemaNamespace. */
  SchemaNamespace(SqlValidatorImpl validator, ImmutableList names) {
    super(validator, null);
    this.names = Objects.requireNonNull(names, "names");
  }

  @Override protected RelDataType validateImpl(RelDataType targetRowType) {
    final RelDataTypeFactory.Builder builder =
        validator.getTypeFactory().builder();
    for (SqlMoniker moniker
        : validator.catalogReader.getAllSchemaObjectNames(names)) {
      final List names1 = moniker.getFullyQualifiedNames();
      final SqlValidatorTable table = requireNonNull(
          validator.catalogReader.getTable(names1),
          () -> "table " + names1 + " is not found in scope " + names);
      builder.add(Util.last(names1), table.getRowType());
    }
    return builder.build();
  }

  @Override public @Nullable SqlNode getNode() {
    return null;
  }
}