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Java Hibernate Basics Getting Started with Hibernate Using the Builder Pattern

Posted by markmneimneh
markmneimneh
14,132 Points

Hibernate Basis

Can you please explain what wrong with my solution. This is Hibernate Basis 'Using the Builder Pattern. The ConnectionBuilder takes no arguments ... so so i am not sure why I keep getting this message "ummer! You haven't properly called the ConnectionBuilder constructor"

Thanks

Bummer! You haven't properly called the ConnectionBuilder constructor

import com.teamtreehouse.builder.Connection; import com.teamtreehouse.builder.Connection.ConnectionBuilder;

public class Application { public static void main(String[] args) { // TODO: User the builder here instead Connection c = new ConnectionConnectionBuilder() .withUser("th_user", "mysuperlongpassword") .withDb("languages") .jdbcVendor9("sqlite") .build(); } }

com/teamtreehouse/builder/Connection.java 
package com.teamtreehouse.builder;

public class Connection {
  private String jdbcVendor;
  private String dbName;
  private String username;
  private String password;

  public Connection(String jdbcVendor, String dbName, String username, String password) {
    this.jdbcVendor = jdbcVendor;
    this.dbName = dbName;
    this.username = username;
    this.password = password;
  }

  public Connection(ConnectionBuilder builder) {
    this.jdbcVendor = builder.jdbcVendor;
    this.dbName = builder.dbName;
    this.username = builder.username;
    this.password = builder.password;
  }

  public static class ConnectionBuilder{
    private String jdbcVendor;
    private String dbName;
    private String username;
    private String password;

    public ConnectionBuilder(){}

    public ConnectionBuilder withJdbcVendor(String jdbcVendor) {
      this.jdbcVendor = jdbcVendor;
      return this;
    }

    public ConnectionBuilder withDb(String dbName) {
      this.dbName = dbName;
      return this;
    }

    public ConnectionBuilder withUser(String username, String password) {
      this.username = username;
      this.password = password;
      return this;
    }

    public Connection build() {
      return new Connection(this);
    }
  }
}
Application.java 
import com.teamtreehouse.builder.Connection;
import com.teamtreehouse.builder.Connection.ConnectionBuilder;

public class Application {
  public static void main(String[] args) {
    // TODO: User the builder here instead
    Connection c = new ConnectionConnectionBuilder()
      .withUser("th_user", "mysuperlongpassword")
      .withDb("languages")
      .jdbcVendor9("sqlite")
      .build();
  }
}

1 Answer

Seth Kroger
Seth Kroger
56,414 Points
Seth Kroger
Seth Kroger
56,414 Points

The part where you have ".jdbcVendor9" should be ".withJdbcVendor" to match the method in the builder.