ArrayUtils.java

package com.seventh7.mybatis.util;

import com.google.common.base.Optional;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * @author yanglin
 */
public final class ArrayUtils {

  private ArrayUtils() {
    throw new UnsupportedOperationException();
  }

  @NotNull
  public static <T> Optional<T> getOnlyElement(@Nullable T[] target, @NotNull T defValue) {
    return Optional.fromNullable(getOnlyElement(target).or(defValue));
  }

  @NotNull
  public static <T> Optional<T> getOnlyElement(@Nullable T[] target) {
    return (null == target || 1 != target.length) ? Optional.<T>absent() : Optional.fromNullable(target[0]);
  }

}