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package com.dahuatech.hutool.core.builder;

import com.dahuatech.hutool.core.util.ArrayUtil;

import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.Collection;
import java.util.Comparator;

/**
 * 用于构建 {@link java.lang.Comparable#compareTo(Object)} 方法的辅助工具
 *
 * 
在Bean对象中，所有相关字段都参与比对，继承的字段不参与。使用方法如下：
 *
 * 
 * public class MyClass {
 *   String field1;
 *   int field2;
 *   boolean field3;
 *
 *   ...
 *
 *   public int compareTo(Object o) {
 *     MyClass myClass = (MyClass) o;
 *     return new CompareToBuilder()
 *       .appendSuper(super.compareTo(o)
 *       .append(this.field1, myClass.field1)
 *       .append(this.field2, myClass.field2)
 *       .append(this.field3, myClass.field3)
 *       .toComparison();
 *   }
 * }
 * 

 *
 * 字段值按照顺序比较，如果某个字段返回非0结果，比较终止，使用{@code toComparison()}返回结果，后续比较忽略。
 *
 * 
也可以使用{@link #reflectionCompare(Object, Object) reflectionCompare} 方法通过反射比较字段，使用方法如下：
 *
 * 
 * public int compareTo(Object o) {
 *   return CompareToBuilder.reflectionCompare(this, o);
 * }
 * 

 *
 * TODO 待整理 来自于Apache-Commons-Lang3
 *
 * @author looly，Apache-Commons
 * @since 4.2.2
 */
public class CompareToBuilder implements Builder {
  private static final long serialVersionUID = 1L;

  /** 当前比较状态 */
  private int comparison;

  /** 构造，构造后调用append方法增加比较项，然后调用{@link #toComparison()}获取结果 */
  public CompareToBuilder() {
    super();
    comparison = 0;
  }

  // -----------------------------------------------------------------------
  /**
   * 通过反射比较两个Bean对象，对象字段可以为private。比较规则如下：
   *
   * 
    
   *   
  • static字段不比较
   *   
  • Transient字段不参与比较
   *   
  • 父类字段参与比较
   * 

   *
   * 
如果被比较的两个对象都为null，被认为相同。
   *
   * @param lhs 第一个对象
   * @param rhs 第二个对象
   * @return a negative integer, zero, or a positive integer as lhs is less than, equal
   *     to, or greater than rhs
   * @throws NullPointerException if either (but not both) parameters are null
   * @throws ClassCastException if rhs is not assignment-compatible with lhs
   *     
   */
  public static int reflectionCompare(final Object lhs, final Object rhs) {
    return reflectionCompare(lhs, rhs, false, null);
  }

  /**
   * Compares two Objects via reflection.
   *
   * 
Fields can be private, thus AccessibleObject.setAccessible is used to bypass
   * normal access control checks. This will fail under a security manager unless the appropriate
   * permissions are set.
   *
   * 
    
   *   
  • Static fields will not be compared
   *   
  • If compareTransients is true, compares transient members.
   *       Otherwise ignores them, as they are likely derived fields.
   *   
  • Superclass fields will be compared
   * 

   *
   * 
If both lhs and rhs are null, they are considered
   * equal.
   *
   * @param lhs left-hand object
   * @param rhs right-hand object
   * @param compareTransients whether to compare transient fields
   * @return a negative integer, zero, or a positive integer as lhs is less than, equal
   *     to, or greater than rhs
   * @throws NullPointerException if either lhs or rhs (but not both) is
   *     null
   * @throws ClassCastException if rhs is not assignment-compatible with lhs
   *     
   */
  public static int reflectionCompare(
      final Object lhs, final Object rhs, final boolean compareTransients) {
    return reflectionCompare(lhs, rhs, compareTransients, null);
  }

  /**
   * Compares two Objects via reflection.
   *
   * 
Fields can be private, thus AccessibleObject.setAccessible is used to bypass
   * normal access control checks. This will fail under a security manager unless the appropriate
   * permissions are set.
   *
   * 
    
   *   
  • Static fields will not be compared
   *   
  • If compareTransients is true, compares transient members.
   *       Otherwise ignores them, as they are likely derived fields.
   *   
  • Superclass fields will be compared
   * 

   *
   * 
If both lhs and rhs are null, they are considered
   * equal.
   *
   * @param lhs left-hand object
   * @param rhs right-hand object
   * @param excludeFields Collection of String fields to exclude
   * @return a negative integer, zero, or a positive integer as lhs is less than, equal
   *     to, or greater than rhs
   * @throws NullPointerException if either lhs or rhs (but not both) is
   *     null
   * @throws ClassCastException if rhs is not assignment-compatible with lhs
   *     
   * @since 2.2
   */
  public static int reflectionCompare(
      final Object lhs, final Object rhs, final Collection excludeFields) {
    return reflectionCompare(lhs, rhs, ArrayUtil.toArray(excludeFields, String.class));
  }

  /**
   * Compares two Objects via reflection.
   *
   * 
Fields can be private, thus AccessibleObject.setAccessible is used to bypass
   * normal access control checks. This will fail under a security manager unless the appropriate
   * permissions are set.
   *
   * 
    
   *   
  • Static fields will not be compared
   *   
  • If compareTransients is true, compares transient members.
   *       Otherwise ignores them, as they are likely derived fields.
   *   
  • Superclass fields will be compared
   * 

   *
   * 
If both lhs and rhs are null, they are considered
   * equal.
   *
   * @param lhs left-hand object
   * @param rhs right-hand object
   * @param excludeFields array of fields to exclude
   * @return a negative integer, zero, or a positive integer as lhs is less than, equal
   *     to, or greater than rhs
   * @throws NullPointerException if either lhs or rhs (but not both) is
   *     null
   * @throws ClassCastException if rhs is not assignment-compatible with lhs
   *     
   * @since 2.2
   */
  public static int reflectionCompare(
      final Object lhs, final Object rhs, final String... excludeFields) {
    return reflectionCompare(lhs, rhs, false, null, excludeFields);
  }

  /**
   * Compares two Objects via reflection.
   *
   * 
Fields can be private, thus AccessibleObject.setAccessible is used to bypass
   * normal access control checks. This will fail under a security manager unless the appropriate
   * permissions are set.
   *
   * 
    
   *   
  • Static fields will not be compared
   *   
  • If the compareTransients is true, compares transient members.
   *       Otherwise ignores them, as they are likely derived fields.
   *   
  • Compares superclass fields up to and including reflectUpToClass. If 
   *       reflectUpToClass is null, compares all superclass fields.
   * 

   *
   * 
If both lhs and rhs are null, they are considered
   * equal.
   *
   * @param lhs left-hand object
   * @param rhs right-hand object
   * @param compareTransients whether to compare transient fields
   * @param reflectUpToClass last superclass for which fields are compared
   * @param excludeFields fields to exclude
   * @return a negative integer, zero, or a positive integer as lhs is less than, equal
   *     to, or greater than rhs
   * @throws NullPointerException if either lhs or rhs (but not both) is
   *     null
   * @throws ClassCastException if rhs is not assignment-compatible with lhs
   *     
   * @since 2.2 (2.0 as reflectionCompare(Object, Object, boolean, Class))
   */
  public static int reflectionCompare(
      final Object lhs,
      final Object rhs,
      final boolean compareTransients,
      final Class reflectUpToClass,
      final String... excludeFields) {

    if (lhs == rhs) {
      return 0;
    }
    if (lhs == null || rhs == null) {
      throw new NullPointerException();
    }
    Class lhsClazz = lhs.getClass();
    if (!lhsClazz.isInstance(rhs)) {
      throw new ClassCastException();
    }
    final CompareToBuilder compareToBuilder = new CompareToBuilder();
    reflectionAppend(lhs, rhs, lhsClazz, compareToBuilder, compareTransients, excludeFields);
    while (lhsClazz.getSuperclass() != null && lhsClazz != reflectUpToClass) {
      lhsClazz = lhsClazz.getSuperclass();
      reflectionAppend(lhs, rhs, lhsClazz, compareToBuilder, compareTransients, excludeFields);
    }
    return compareToBuilder.toComparison();
  }

  /**
   * Appends to builder the comparison of lhs to rhs using
   * the fields defined in clazz.
   *
   * @param lhs left-hand object
   * @param rhs right-hand object
   * @param clazz Class that defines fields to be compared
   * @param builder CompareToBuilder to append to
   * @param useTransients whether to compare transient fields
   * @param excludeFields fields to exclude
   */
  private static void reflectionAppend(
      final Object lhs,
      final Object rhs,
      final Class clazz,
      final CompareToBuilder builder,
      final boolean useTransients,
      final String[] excludeFields) {

    final Field[] fields = clazz.getDeclaredFields();
    AccessibleObject.setAccessible(fields, true);
    for (int i = 0; i < fields.length && builder.comparison == 0; i++) {
      final Field f = fields[i];
      if (false == ArrayUtil.contains(excludeFields, f.getName())
          && (f.getName().indexOf('$') == -1)
          && (useTransients || !Modifier.isTransient(f.getModifiers()))
          && (!Modifier.isStatic(f.getModifiers()))) {
        try {
          builder.append(f.get(lhs), f.get(rhs));
        } catch (final IllegalAccessException e) {
          // This can't happen. Would get a Security exception instead.
          // Throw a runtime exception in case the impossible happens.
          throw new InternalError("Unexpected IllegalAccessException");
        }
      }
    }
  }

  // -----------------------------------------------------------------------
  /**
   * Appends to the builder the compareTo(Object) result of the
   * superclass.
   *
   * @param superCompareTo result of calling super.compareTo(Object)
   * @return this - used to chain append calls
   * @since 2.0
   */
  public CompareToBuilder appendSuper(final int superCompareTo) {
    if (comparison != 0) {
      return this;
    }
    comparison = superCompareTo;
    return this;
  }

  // -----------------------------------------------------------------------
  /**
   * Appends to the builder the comparison of two Objects.
   *
   * 
    
   *   
  1. Check if lhs == rhs
   *   
  2. Check if either lhs or rhs is null, a null
   *        object is less than a non-null object
   *   
  3. Check the object contents
   * 

   *
   * 
lhs must either be an array or implement {@link Comparable}.
   *
   * @param lhs left-hand object
   * @param rhs right-hand object
   * @return this - used to chain append calls
   * @throws ClassCastException if rhs is not assignment-compatible with lhs
   *     
   */
  public CompareToBuilder append(final Object lhs, final Object rhs) {
    return append(lhs, rhs, null);
  }

  /**
   * Appends to the builder the comparison of two Objects.
   *
   * 
    
   *   
  1. Check if lhs == rhs
   *   
  2. Check if either lhs or rhs is null, a null
   *        object is less than a non-null object
   *   
  3. Check the object contents
   * 

   *
   * 
If lhs is an array, array comparison methods will be used. Otherwise 
   * comparator will be used to compare the objects. If comparator is null
   * , lhs must implement {@link Comparable} instead.
   *
   * @param lhs left-hand object
   * @param rhs right-hand object
   * @param comparator Comparator used to compare the objects, null means
   *     treat lhs as Comparable
   * @return this - used to chain append calls
   * @throws ClassCastException if rhs is not assignment-compatible with lhs
   *     
   * @since 2.0
   */
  public CompareToBuilder append(
      final Object lhs, final Object rhs, final Comparator comparator) {
    if (comparison != 0) {
      return this;
    }
    if (lhs == rhs) {
      return this;
    }
    if (lhs == null) {
      comparison = -1;
      return this;
    }
    if (rhs == null) {
      comparison = +1;
      return this;
    }
    if (lhs.getClass().isArray()) {
      // switch on type of array, to dispatch to the correct handler
      // handles multi dimensional arrays
      // throws a ClassCastException if rhs is not the correct array type
      if (lhs instanceof long[]) {
        append((long[]) lhs, (long[]) rhs);
      } else if (lhs instanceof int[]) {
        append((int[]) lhs, (int[]) rhs);
      } else if (lhs instanceof short[]) {
        append((short[]) lhs, (short[]) rhs);
      } else if (lhs instanceof char[]) {
        append((char[]) lhs, (char[]) rhs);
      } else if (lhs instanceof byte[]) {
        append((byte[]) lhs, (byte[]) rhs);
      } else if (lhs instanceof double[]) {
        append((double[]) lhs, (double[]) rhs);
      } else if (lhs instanceof float[]) {
        append((float[]) lhs, (float[]) rhs);
      } else if (lhs instanceof boolean[]) {
        append((boolean[]) lhs, (boolean[]) rhs);
      } else {
        // not an array of primitives
        // throws a ClassCastException if rhs is not an array
        append((Object[]) lhs, (Object[]) rhs, comparator);
      }
    } else {
      // the simple case, not an array, just test the element
      if (comparator == null) {
        @SuppressWarnings("unchecked") // assume this can be done; if not throw CCE as per Javadoc
        final Comparable comparable = (Comparable) lhs;
        comparison = comparable.compareTo(rhs);
      } else {
        @SuppressWarnings("unchecked") // assume this can be done; if not throw CCE as per Javadoc
        final Comparator comparator2 = (Comparator) comparator;
        comparison = comparator2.compare(lhs, rhs);
      }
    }
    return this;
  }

  // -------------------------------------------------------------------------
  /**
   * Appends to the builder the comparison of two longs.
   *
   * @param lhs left-hand value
   * @param rhs right-hand value
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final long lhs, final long rhs) {
    if (comparison != 0) {
      return this;
    }
    comparison = ((lhs < rhs) ? -1 : ((lhs > rhs) ? 1 : 0));
    return this;
  }

  /**
   * Appends to the builder the comparison of two ints.
   *
   * @param lhs left-hand value
   * @param rhs right-hand value
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final int lhs, final int rhs) {
    if (comparison != 0) {
      return this;
    }
    comparison = ((lhs < rhs) ? -1 : ((lhs > rhs) ? 1 : 0));
    return this;
  }

  /**
   * Appends to the builder the comparison of two shorts.
   *
   * @param lhs left-hand value
   * @param rhs right-hand value
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final short lhs, final short rhs) {
    if (comparison != 0) {
      return this;
    }
    comparison = ((lhs < rhs) ? -1 : ((lhs > rhs) ? 1 : 0));
    return this;
  }

  /**
   * Appends to the builder the comparison of two chars.
   *
   * @param lhs left-hand value
   * @param rhs right-hand value
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final char lhs, final char rhs) {
    if (comparison != 0) {
      return this;
    }
    comparison = ((lhs < rhs) ? -1 : ((lhs > rhs) ? 1 : 0));
    return this;
  }

  /**
   * Appends to the builder the comparison of two bytes.
   *
   * @param lhs left-hand value
   * @param rhs right-hand value
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final byte lhs, final byte rhs) {
    if (comparison != 0) {
      return this;
    }
    comparison = ((lhs < rhs) ? -1 : ((lhs > rhs) ? 1 : 0));
    return this;
  }

  /**
   * Appends to the builder the comparison of two doubles.
   *
   * 
This handles NaNs, Infinities, and -0.0.
   *
   * 
It is compatible with the hash code generated by HashCodeBuilder.
   *
   * @param lhs left-hand value
   * @param rhs right-hand value
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final double lhs, final double rhs) {
    if (comparison != 0) {
      return this;
    }
    comparison = Double.compare(lhs, rhs);
    return this;
  }

  /**
   * Appends to the builder the comparison of two floats.
   *
   * 
This handles NaNs, Infinities, and -0.0.
   *
   * 
It is compatible with the hash code generated by HashCodeBuilder.
   *
   * @param lhs left-hand value
   * @param rhs right-hand value
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final float lhs, final float rhs) {
    if (comparison != 0) {
      return this;
    }
    comparison = Float.compare(lhs, rhs);
    return this;
  }

  /**
   * Appends to the builder the comparison of two booleanss.
   *
   * @param lhs left-hand value
   * @param rhs right-hand value
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final boolean lhs, final boolean rhs) {
    if (comparison != 0) {
      return this;
    }
    if (lhs == rhs) {
      return this;
    }
    if (lhs == false) {
      comparison = -1;
    } else {
      comparison = +1;
    }
    return this;
  }

  // -----------------------------------------------------------------------
  /**
   * Appends to the builder the deep comparison of two Object arrays.
   *
   * 
    
   *   
  1. Check if arrays are the same using ==
   *   
  2. Check if for null, null is less than non-null
   *   
  3. Check array length, a short length array is less than a long length array
   *   
  4. Check array contents element by element using {@link #append(Object, Object, Comparator)}
   * 

   *
   * 
This method will also will be called for the top level of multi-dimensional, ragged, and
   * multi-typed arrays.
   *
   * @param lhs left-hand array
   * @param rhs right-hand array
   * @return this - used to chain append calls
   * @throws ClassCastException if rhs is not assignment-compatible with lhs
   *     
   */
  public CompareToBuilder append(final Object[] lhs, final Object[] rhs) {
    return append(lhs, rhs, null);
  }

  /**
   * Appends to the builder the deep comparison of two Object arrays.
   *
   * 
    
   *   
  1. Check if arrays are the same using ==
   *   
  2. Check if for null, null is less than non-null
   *   
  3. Check array length, a short length array is less than a long length array
   *   
  4. Check array contents element by element using {@link #append(Object, Object, Comparator)}
   * 

   *
   * 
This method will also will be called for the top level of multi-dimensional, ragged, and
   * multi-typed arrays.
   *
   * @param lhs left-hand array
   * @param rhs right-hand array
   * @param comparator Comparator to use to compare the array elements, null
   *      means to treat lhs elements as Comparable.
   * @return this - used to chain append calls
   * @throws ClassCastException if rhs is not assignment-compatible with lhs
   *     
   * @since 2.0
   */
  public CompareToBuilder append(
      final Object[] lhs, final Object[] rhs, final Comparator comparator) {
    if (comparison != 0) {
      return this;
    }
    if (lhs == rhs) {
      return this;
    }
    if (lhs == null) {
      comparison = -1;
      return this;
    }
    if (rhs == null) {
      comparison = +1;
      return this;
    }
    if (lhs.length != rhs.length) {
      comparison = (lhs.length < rhs.length) ? -1 : +1;
      return this;
    }
    for (int i = 0; i < lhs.length && comparison == 0; i++) {
      append(lhs[i], rhs[i], comparator);
    }
    return this;
  }

  /**
   * Appends to the builder the deep comparison of two long arrays.
   *
   * 
    
   *   
  1. Check if arrays are the same using ==
   *   
  2. Check if for null, null is less than non-null
   *   
  3. Check array length, a shorter length array is less than a longer length array
   *   
  4. Check array contents element by element using {@link #append(long, long)}
   * 

   *
   * @param lhs left-hand array
   * @param rhs right-hand array
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final long[] lhs, final long[] rhs) {
    if (comparison != 0) {
      return this;
    }
    if (lhs == rhs) {
      return this;
    }
    if (lhs == null) {
      comparison = -1;
      return this;
    }
    if (rhs == null) {
      comparison = +1;
      return this;
    }
    if (lhs.length != rhs.length) {
      comparison = (lhs.length < rhs.length) ? -1 : +1;
      return this;
    }
    for (int i = 0; i < lhs.length && comparison == 0; i++) {
      append(lhs[i], rhs[i]);
    }
    return this;
  }

  /**
   * Appends to the builder the deep comparison of two int arrays.
   *
   * 
    
   *   
  1. Check if arrays are the same using ==
   *   
  2. Check if for null, null is less than non-null
   *   
  3. Check array length, a shorter length array is less than a longer length array
   *   
  4. Check array contents element by element using {@link #append(int, int)}
   * 

   *
   * @param lhs left-hand array
   * @param rhs right-hand array
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final int[] lhs, final int[] rhs) {
    if (comparison != 0) {
      return this;
    }
    if (lhs == rhs) {
      return this;
    }
    if (lhs == null) {
      comparison = -1;
      return this;
    }
    if (rhs == null) {
      comparison = +1;
      return this;
    }
    if (lhs.length != rhs.length) {
      comparison = (lhs.length < rhs.length) ? -1 : +1;
      return this;
    }
    for (int i = 0; i < lhs.length && comparison == 0; i++) {
      append(lhs[i], rhs[i]);
    }
    return this;
  }

  /**
   * Appends to the builder the deep comparison of two short arrays.
   *
   * 
    
   *   
  1. Check if arrays are the same using ==
   *   
  2. Check if for null, null is less than non-null
   *   
  3. Check array length, a shorter length array is less than a longer length array
   *   
  4. Check array contents element by element using {@link #append(short, short)}
   * 

   *
   * @param lhs left-hand array
   * @param rhs right-hand array
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final short[] lhs, final short[] rhs) {
    if (comparison != 0) {
      return this;
    }
    if (lhs == rhs) {
      return this;
    }
    if (lhs == null) {
      comparison = -1;
      return this;
    }
    if (rhs == null) {
      comparison = +1;
      return this;
    }
    if (lhs.length != rhs.length) {
      comparison = (lhs.length < rhs.length) ? -1 : +1;
      return this;
    }
    for (int i = 0; i < lhs.length && comparison == 0; i++) {
      append(lhs[i], rhs[i]);
    }
    return this;
  }

  /**
   * Appends to the builder the deep comparison of two char arrays.
   *
   * 
    
   *   
  1. Check if arrays are the same using ==
   *   
  2. Check if for null, null is less than non-null
   *   
  3. Check array length, a shorter length array is less than a longer length array
   *   
  4. Check array contents element by element using {@link #append(char, char)}
   * 

   *
   * @param lhs left-hand array
   * @param rhs right-hand array
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final char[] lhs, final char[] rhs) {
    if (comparison != 0) {
      return this;
    }
    if (lhs == rhs) {
      return this;
    }
    if (lhs == null) {
      comparison = -1;
      return this;
    }
    if (rhs == null) {
      comparison = +1;
      return this;
    }
    if (lhs.length != rhs.length) {
      comparison = (lhs.length < rhs.length) ? -1 : +1;
      return this;
    }
    for (int i = 0; i < lhs.length && comparison == 0; i++) {
      append(lhs[i], rhs[i]);
    }
    return this;
  }

  /**
   * Appends to the builder the deep comparison of two byte arrays.
   *
   * 
    
   *   
  1. Check if arrays are the same using ==
   *   
  2. Check if for null, null is less than non-null
   *   
  3. Check array length, a shorter length array is less than a longer length array
   *   
  4. Check array contents element by element using {@link #append(byte, byte)}
   * 

   *
   * @param lhs left-hand array
   * @param rhs right-hand array
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final byte[] lhs, final byte[] rhs) {
    if (comparison != 0) {
      return this;
    }
    if (lhs == rhs) {
      return this;
    }
    if (lhs == null) {
      comparison = -1;
      return this;
    }
    if (rhs == null) {
      comparison = +1;
      return this;
    }
    if (lhs.length != rhs.length) {
      comparison = (lhs.length < rhs.length) ? -1 : +1;
      return this;
    }
    for (int i = 0; i < lhs.length && comparison == 0; i++) {
      append(lhs[i], rhs[i]);
    }
    return this;
  }

  /**
   * Appends to the builder the deep comparison of two double arrays.
   *
   * 
    
   *   
  1. Check if arrays are the same using ==
   *   
  2. Check if for null, null is less than non-null
   *   
  3. Check array length, a shorter length array is less than a longer length array
   *   
  4. Check array contents element by element using {@link #append(double, double)}
   * 

   *
   * @param lhs left-hand array
   * @param rhs right-hand array
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final double[] lhs, final double[] rhs) {
    if (comparison != 0) {
      return this;
    }
    if (lhs == rhs) {
      return this;
    }
    if (lhs == null) {
      comparison = -1;
      return this;
    }
    if (rhs == null) {
      comparison = +1;
      return this;
    }
    if (lhs.length != rhs.length) {
      comparison = (lhs.length < rhs.length) ? -1 : +1;
      return this;
    }
    for (int i = 0; i < lhs.length && comparison == 0; i++) {
      append(lhs[i], rhs[i]);
    }
    return this;
  }

  /**
   * Appends to the builder the deep comparison of two float arrays.
   *
   * 
    
   *   
  1. Check if arrays are the same using ==
   *   
  2. Check if for null, null is less than non-null
   *   
  3. Check array length, a shorter length array is less than a longer length array
   *   
  4. Check array contents element by element using {@link #append(float, float)}
   * 

   *
   * @param lhs left-hand array
   * @param rhs right-hand array
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final float[] lhs, final float[] rhs) {
    if (comparison != 0) {
      return this;
    }
    if (lhs == rhs) {
      return this;
    }
    if (lhs == null) {
      comparison = -1;
      return this;
    }
    if (rhs == null) {
      comparison = +1;
      return this;
    }
    if (lhs.length != rhs.length) {
      comparison = (lhs.length < rhs.length) ? -1 : +1;
      return this;
    }
    for (int i = 0; i < lhs.length && comparison == 0; i++) {
      append(lhs[i], rhs[i]);
    }
    return this;
  }

  /**
   * Appends to the builder the deep comparison of two boolean arrays.
   *
   * 
    
   *   
  1. Check if arrays are the same using ==
   *   
  2. Check if for null, null is less than non-null
   *   
  3. Check array length, a shorter length array is less than a longer length array
   *   
  4. Check array contents element by element using {@link #append(boolean, boolean)}
   * 

   *
   * @param lhs left-hand array
   * @param rhs right-hand array
   * @return this - used to chain append calls
   */
  public CompareToBuilder append(final boolean[] lhs, final boolean[] rhs) {
    if (comparison != 0) {
      return this;
    }
    if (lhs == rhs) {
      return this;
    }
    if (lhs == null) {
      comparison = -1;
      return this;
    }
    if (rhs == null) {
      comparison = +1;
      return this;
    }
    if (lhs.length != rhs.length) {
      comparison = (lhs.length < rhs.length) ? -1 : +1;
      return this;
    }
    for (int i = 0; i < lhs.length && comparison == 0; i++) {
      append(lhs[i], rhs[i]);
    }
    return this;
  }

  // -----------------------------------------------------------------------
  /**
   * Returns a negative integer, a positive integer, or zero as the builder has judged
   * the "left-hand" side as less than, greater than, or equal to the "right-hand" side.
   *
   * @return final comparison result
   * @see #build()
   */
  public int toComparison() {
    return comparison;
  }

  /**
   * Returns a negative Integer, a positive Integer, or zero as the builder has judged
   * the "left-hand" side as less than, greater than, or equal to the "right-hand" side.
   *
   * @return final comparison result as an Integer
   * @see #toComparison()
   * @since 3.0
   */
  @Override
  public Integer build() {
    return toComparison();
  }
}
    

    

    
            
    
            







    
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