io.github.cainlara.jalutils.StringUtils Maven / Gradle / Ivy

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package io.github.cainlara.jalutils;

/**
 * Provides String class utilities. This class is intended to be
 * used as a Singleton Pattern implementation.
 * 
 * @author jalara
 */
public final class StringUtils {
  private static StringUtils instance;

  private StringUtils() {
    // hide constructor
  }

  /**
   * Retrives the only instance of this class.
   * 
   * @return an instance of this class.
   */
  public static StringUtils getInstance() {
    if (instance == null) {
      instance = new StringUtils();
    }

    return instance;
  }

  /**
   * Validates if a string instance is a blank text.
   * 
   * A text is considered blank as long as it fulfills at least one of the next
   * conditions:
   * 

   * The object is null.
   * After triming the lenght of the text is 0.
   * 
   * 
   * @param text The String instance to be evaluated.
   * 
   * @return true if and only if the text parameter is
   *         valid.
   *         
   * @see String#trim()
   */
  public boolean isBlank(final String text) {
    return text == null || text.trim().isEmpty();
  }
}