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 com.datastax.oss.driver.api.core.metadata.schema;
  
  import com.datastax.oss.driver.api.core.CqlIdentifier;
  import com.datastax.oss.driver.internal.core.metadata.schema.ScriptBuilder;
  import com.datastax.oss.driver.internal.core.metadata.schema.parsing.RelationParser;
  import edu.umd.cs.findbugs.annotations.NonNull;
  import java.util.Optional;
  
  /** A materialized view in the schema metadata. */
  public interface ViewMetadata extends RelationMetadata {
  
    /** The table that this view is based on. */
    @NonNull
    CqlIdentifier getBaseTable();
  
    /**
     * Whether this view does a {@code SELECT *} on its base table (this only affects the output of
     * {@link #describe(boolean)}).
     */
    boolean includesAllColumns();
  
    @NonNull
    Optional<String> getWhereClause();
  
    @NonNull
    @Override
    default String describe(boolean pretty) {
      ScriptBuilder builder =
          new ScriptBuilder(pretty)
              .append("CREATE MATERIALIZED VIEW ")
              .append(getKeyspace())
              .append(".")
              .append(getName())
              .append(" AS")
              .newLine();
  
      builder.append("SELECT");
      if (includesAllColumns()) {
        builder.append(" * ");
      } else {
        builder.newLine().increaseIndent();
        boolean first = true;
        for (ColumnMetadata column : getColumns().values()) {
          if (first) {
            first = false;
          } else {
            builder.append(",").newLine();
          }
          builder.append(column.getName());
        }
        builder.newLine().decreaseIndent();
      }
  
      builder.append("FROM ").append(getKeyspace()).append(".").append(getBaseTable());
  
      Optional<String> whereClause = getWhereClause();
      if (whereClause.isPresent() && !whereClause.get().isEmpty()) {
        builder.newLine().append("WHERE ").append(whereClause.get());
      }
  
      builder.newLine().append("PRIMARY KEY (");
      if (getPartitionKey().size() == 1) { // PRIMARY KEY (k
        builder.append(getPartitionKey().get(0).getName());
      } else { // PRIMARY KEY ((k1, k2)
        builder.append("(");
        boolean first = true;
        for (ColumnMetadata pkColumn : getPartitionKey()) {
          if (first) {
            first = false;
          } else {
            builder.append(", ");
          }
          builder.append(pkColumn.getName());
        }
        builder.append(")");
      }
      // PRIMARY KEY (<pk portion>, cc1, cc2, cc3)
      for (ColumnMetadata clusteringColumn : getClusteringColumns().keySet()) {
        builder.append(", ").append(clusteringColumn.getName());
      }
      builder.append(")").increaseIndent();
  
      RelationParser.appendOptions(getOptions(), builder);
      return builder.append(";").build();
    }
  
    @NonNull
    @Override
    default String describeWithChildren(boolean pretty) {
      return describe(pretty); // A view has no children
    }
  }
  