com.techempower.gemini.pyxis.password.PasswordLength Maven / Gradle / Ivy

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package com.techempower.gemini.pyxis.password;

import com.techempower.util.*;

/**
 * Enforces a length requirement on passwords.
 */
public class   PasswordLength
    implements PasswordRequirement
{

  private final static int DEFAULT_MINIMUM = 8;
  private final static int DEFAULT_MAXIMUM = 30;
  
  private final IntRange length;
  
  public PasswordLength(IntRange length)
  {
    this.length = length;
  }
  
  public PasswordLength(int minimumLength, int maximumLength)
  {
    this(new IntRange(minimumLength, maximumLength));
  }
  
  public PasswordLength()
  {
    this(DEFAULT_MINIMUM, DEFAULT_MAXIMUM);
  }
  
  @Override
  public String validate(PasswordProposal proposal)
  {
    final int proposedLength = proposal.password.length();
    if (  (proposedLength < length.min)
       || (proposedLength > length.max)
       )
    {
      return "Password must be between " + length.min + " and " + length.max 
          + " characters in length.";
    }
    
    return null;
  }

}