com.scalar.db.sql.statement.builder.DropTableStatementBuilder Maven / Gradle / Ivy

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package com.scalar.db.sql.statement.builder;

import com.scalar.db.sql.TableRef;
import com.scalar.db.sql.statement.DropTableStatement;
import javax.annotation.Nullable;

public class DropTableStatementBuilder {

  private DropTableStatementBuilder() {}

  public static class Start extends Buildable {
    Start(@Nullable String namespaceName, String tableName) {
      super(namespaceName, tableName, false);
    }

    /**
     * Specifies that the table should be dropped only if it exists.
     *
     * @return a builder object
     */
    public Buildable ifExists() {
      return new Buildable(namespaceName, tableName, true);
    }

    /**
     * Specifies whether the table should be dropped only if it exists.
     *
     * @param ifExists whether the table should be dropped only if it exists
     * @return a builder object
     */
    public Buildable ifExists(boolean ifExists) {
      return new Buildable(namespaceName, tableName, ifExists);
    }
  }

  public static class Buildable {
    @Nullable protected final String namespaceName;
    protected final String tableName;
    private final boolean ifExists;

    private Buildable(@Nullable String namespaceName, String tableName, boolean ifExists) {
      this.namespaceName = namespaceName;
      this.tableName = tableName;
      this.ifExists = ifExists;
    }

    /**
     * Builds a DropTableStatement object.
     *
     * @return a DropTableStatement object
     */
    public DropTableStatement build() {
      return DropTableStatement.create(TableRef.of(namespaceName, tableName), ifExists);
    }
  }
}