Employee_FreeBuilder

package com.test;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Joiner;
import com.google.common.base.Preconditions;
import java.util.EnumSet;
import java.util.Objects;
import java.util.function.UnaryOperator;
import javax.annotation.Generated;

/**
 * Auto-generated superclass of {@link Employee.Builder}, derived from the API of {@link Employee}.
 */
@Generated("org.inferred.freebuilder.processor.CodeGenerator")
abstract class Employee_Builder {

  /** Creates a new builder using {@code value} as a template. */
  public static Employee.Builder from(Employee value) {
    return Employee.builder().mergeFrom(value);
  }

  private static final Joiner COMMA_JOINER = Joiner.on(", ").skipNulls();

  private enum Property {
    NAME("name"),
    ID("id"),
    ;

    private final String name;

    private Property(String name) {
      this.name = name;
    }

    @Override
    public String toString() {
      return name;
    }
  }

  private String name;
  private int id;
  private final EnumSet<Employee_Builder.Property> _unsetProperties =
      EnumSet.allOf(Employee_Builder.Property.class);

  /**
   * Sets the value to be returned by {@link Employee#name()}.
   *
   * @return this {@code Builder} object
   * @throws NullPointerException if {@code name} is null
   */
  public Employee.Builder name(String name) {
    this.name = Preconditions.checkNotNull(name);
    _unsetProperties.remove(Employee_Builder.Property.NAME);
    return (Employee.Builder) this;
  }

  /**
   * Replaces the value to be returned by {@link Employee#name()} by applying {@code mapper} to it
   * and using the result.
   *
   * @return this {@code Builder} object
   * @throws NullPointerException if {@code mapper} is null or returns null
   * @throws IllegalStateException if the field has not been set
   */
  public Employee.Builder mapName(UnaryOperator<String> mapper) {
    Preconditions.checkNotNull(mapper);
    return name(mapper.apply(name()));
  }

  /**
   * Returns the value that will be returned by {@link Employee#name()}.
   *
   * @throws IllegalStateException if the field has not been set
   */
  public String name() {
    Preconditions.checkState(
        !_unsetProperties.contains(Employee_Builder.Property.NAME), "name not set");
    return name;
  }

  /**
   * Sets the value to be returned by {@link Employee#id()}.
   *
   * @return this {@code Builder} object
   */
  public Employee.Builder id(int id) {
    this.id = id;
    _unsetProperties.remove(Employee_Builder.Property.ID);
    return (Employee.Builder) this;
  }

  /**
   * Replaces the value to be returned by {@link Employee#id()} by applying {@code mapper} to it and
   * using the result.
   *
   * @return this {@code Builder} object
   * @throws NullPointerException if {@code mapper} is null or returns null
   * @throws IllegalStateException if the field has not been set
   */
  public Employee.Builder mapId(UnaryOperator<Integer> mapper) {
    Preconditions.checkNotNull(mapper);
    return id(mapper.apply(id()));
  }

  /**
   * Returns the value that will be returned by {@link Employee#id()}.
   *
   * @throws IllegalStateException if the field has not been set
   */
  public int id() {
    Preconditions.checkState(
        !_unsetProperties.contains(Employee_Builder.Property.ID), "id not set");
    return id;
  }

  /** Sets all property values using the given {@code Employee} as a template. */
  public Employee.Builder mergeFrom(Employee value) {
    Employee_Builder _defaults = Employee.builder();
    if (_defaults._unsetProperties.contains(Employee_Builder.Property.NAME)
        || !Objects.equals(value.name(), _defaults.name())) {
      name(value.name());
    }
    if (_defaults._unsetProperties.contains(Employee_Builder.Property.ID)
        || !Objects.equals(value.id(), _defaults.id())) {
      id(value.id());
    }
    return (Employee.Builder) this;
  }

  /**
   * Copies values from the given {@code Builder}. Does not affect any properties not set on the
   * input.
   */
  public Employee.Builder mergeFrom(Employee.Builder template) {
    // Upcast to access private fields; otherwise, oddly, we get an access violation.
    Employee_Builder base = template;
    Employee_Builder _defaults = Employee.builder();
    if (!base._unsetProperties.contains(Employee_Builder.Property.NAME)
        && (_defaults._unsetProperties.contains(Employee_Builder.Property.NAME)
            || !Objects.equals(template.name(), _defaults.name()))) {
      name(template.name());
    }
    if (!base._unsetProperties.contains(Employee_Builder.Property.ID)
        && (_defaults._unsetProperties.contains(Employee_Builder.Property.ID)
            || !Objects.equals(template.id(), _defaults.id()))) {
      id(template.id());
    }
    return (Employee.Builder) this;
  }

  /** Resets the state of this builder. */
  public Employee.Builder clear() {
    Employee_Builder _defaults = Employee.builder();
    name = _defaults.name;
    id = _defaults.id;
    _unsetProperties.clear();
    _unsetProperties.addAll(_defaults._unsetProperties);
    return (Employee.Builder) this;
  }

  /**
   * Returns a newly-created {@link Employee} based on the contents of the {@code Builder}.
   *
   * @throws IllegalStateException if any field has not been set
   */
  public Employee build() {
    Preconditions.checkState(_unsetProperties.isEmpty(), "Not set: %s", _unsetProperties);
    return new Employee_Builder.Value(this);
  }

  /**
   * Returns a newly-created partial {@link Employee} for use in unit tests. State checking will not
   * be performed. Unset properties will throw an {@link UnsupportedOperationException} when
   * accessed via the partial object.
   *
   * <p>Partials should only ever be used in tests. They permit writing robust test cases that won't
   * fail if this type gains more application-level constraints (e.g. new required fields) in
   * future. If you require partially complete values in production code, consider using a Builder.
   */
  @VisibleForTesting()
  public Employee buildPartial() {
    return new Employee_Builder.Partial(this);
  }

  private static final class Value extends Employee {
    private final String name;
    private final int id;

    private Value(Employee_Builder builder) {
      this.name = builder.name;
      this.id = builder.id;
    }

    @Override
    public String name() {
      return name;
    }

    @Override
    public int id() {
      return id;
    }

    @Override
    public boolean equals(Object obj) {
      if (!(obj instanceof Employee_Builder.Value)) {
        return false;
      }
      Employee_Builder.Value other = (Employee_Builder.Value) obj;
      return Objects.equals(name, other.name) && Objects.equals(id, other.id);
    }

    @Override
    public int hashCode() {
      return Objects.hash(name, id);
    }

    @Override
    public String toString() {
      return "Employee{" + "name=" + name + ", " + "id=" + id + "}";
    }
  }

  private static final class Partial extends Employee {
    private final String name;
    private final int id;
    private final EnumSet<Employee_Builder.Property> _unsetProperties;

    Partial(Employee_Builder builder) {
      this.name = builder.name;
      this.id = builder.id;
      this._unsetProperties = builder._unsetProperties.clone();
    }

    @Override
    public String name() {
      if (_unsetProperties.contains(Employee_Builder.Property.NAME)) {
        throw new UnsupportedOperationException("name not set");
      }
      return name;
    }

    @Override
    public int id() {
      if (_unsetProperties.contains(Employee_Builder.Property.ID)) {
        throw new UnsupportedOperationException("id not set");
      }
      return id;
    }

    @Override
    public boolean equals(Object obj) {
      if (!(obj instanceof Employee_Builder.Partial)) {
        return false;
      }
      Employee_Builder.Partial other = (Employee_Builder.Partial) obj;
      return Objects.equals(name, other.name)
          && Objects.equals(id, other.id)
          && Objects.equals(_unsetProperties, other._unsetProperties);
    }

    @Override
    public int hashCode() {
      return Objects.hash(name, id, _unsetProperties);
    }

    @Override
    public String toString() {
      return "partial Employee{"
          + COMMA_JOINER.join(
              (!_unsetProperties.contains(Employee_Builder.Property.NAME) ? "name=" + name : null),
              (!_unsetProperties.contains(Employee_Builder.Property.ID) ? "id=" + id : null))
          + "}";
    }
  }
}