com.vectorprint.configuration.parameters.CharPasswordParameter Maven / Gradle / Ivy

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A library for settings and parameterization of objects. Key features are support for data types, help for settings and parameters, annotations for ease of use. Settings and parameters both are Clonable and Serializable. More features for settings such as parsing a settingsfile, being observable, readonliness, caching etc. are available. The library contains javacc generated parsers for syntax support for properties, multi valued properties, parameterized objects and multi valued parameters.

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package com.vectorprint.configuration.parameters;

/*-
 * #%L
 * Config
 * %%
 * Copyright (C) 2015 - 2018 VectorPrint
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import com.vectorprint.ArrayHelper;

import java.util.Arrays;

public class CharPasswordParameter extends ParameterImpl {

   private boolean clearAfterGet;

   /**
    * Calls {@link #CharPasswordParameter(java.lang.String, java.lang.String, boolean) } with true;
    *
    * @param key
    * @param help
    */
   public CharPasswordParameter(String key, String help) {
      this(key, help, true);
   }

   public CharPasswordParameter(String key, String help, boolean clearAfterGet) {
      super(key, help, char[].class);
      this.clearAfterGet = clearAfterGet;
   }

   @Override
   public final Parameter setDefault(char[] value) {
      return this;
   }

   @Override
   public final char[] getDefault() {
      return null;
   }

   public boolean isClearAfterGet() {
      return clearAfterGet;
   }

   /**
    * when {@link #clearAfterGet} is true, will clear the password.
    *
    * @return
    */
   @Override
   public final char[] getValue() {
      char[] copy = super.getValue();
      if (copy == null) {
         return null;
      }
      if (clearAfterGet) {
          log.warn("clearing password after first retrieval");
          copy = Arrays.copyOf(copy, copy.length);
         ArrayHelper.clear(super.getValue());
         setValue(null);
      }
      return copy;
   }

   @Override
   public Parameter clone() throws CloneNotSupportedException {
      CharPasswordParameter cp = (CharPasswordParameter) super.clone();
      cp.clearAfterGet = clearAfterGet;
      return cp;
   }

   @Override
   public final boolean equals(Object obj) {
      return super.equals(obj) && ((CharPasswordParameter) obj).clearAfterGet == clearAfterGet;
   }

   @Override
   protected final String valueToString(char[] value) {
      return "";
   }
}