/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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
    *
    *      https://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.
   */
  package org.apache.commons.validator;
  
  import java.io.Serializable;
  import java.text.MessageFormat;
  
  /**
   * <p>
   * A default argument or an argument for a
   * specific validator definition (ex: required)
   * can be stored to pass into a message as parameters.  This can be used in a
   * pluggable validator for constructing locale
   * sensitive messages by using {@link MessageFormat}
   * or an equivalent class.  The resource field can be
   * used to determine if the value stored in the argument
   * is a value to be retrieved from a locale sensitive
   * message retrieval system like {@code java.util.PropertyResourceBundle}.
   * The resource field defaults to 'true'.
   * </p>
   * <p>Instances of this class are configured with an &lt;arg&gt; xml element.</p>
   */
  //TODO mutable non-private fields
  public class Arg implements Cloneable, Serializable {
  
      private static final long serialVersionUID = -8922606779669839294L;
  
      /**
       * The resource bundle name that this Arg's {@code key} should be
       * resolved in (optional).
       * @since 1.1
       */
      protected String bundle;
  
      /**
       * The key or value of the argument.
       */
      protected String key;
  
      /**
       * The name dependency that this argument goes with (optional).
       */
      protected String name;
  
      /**
       * This argument's position in the message. Set position=0 to
       * make a replacement in this string: "some msg {0}".
       * @since 1.1
       */
      protected int position = -1;
  
      /**
       * Whether or not the key is a message resource (optional).  Defaults to
       * true.  If it is 'true', the value will try to be resolved as a message
       * resource.
       */
      protected boolean resource = true;
  
      /**
       * Constructs a new instance.
       */
      public Arg() {
          // empty
      }
  
      /**
       * Creates and returns a copy of this object.
       * @return A copy of this object.
       */
      @Override
      public Object clone() {
          try {
              return super.clone();
          } catch (final CloneNotSupportedException e) {
              throw new UnsupportedOperationException(e.toString(), e);
          }
      }
  
      /**
       * Gets the resource bundle name.
       *
       * @return the bundle name.
       * @since 1.1
       */
      public String getBundle() {
         return bundle;
     }
 
     /**
      * Gets the key/value.
      *
      * @return the key value.
      */
     public String getKey() {
         return key;
     }
 
     /**
      * Gets the name of the dependency.
      *
      * @return the name of the dependency.
      */
     public String getName() {
         return name;
     }
 
     /**
      * Gets the replacement position.
      *
      * @return This replacement position.
      */
     public int getPosition() {
         return position;
     }
 
     /**
      * Tests whether or not the key is a resource key or literal value.
      *
      * @return {@code true} if key is a resource key.
      */
     public boolean isResource() {
         return resource;
     }
 
     /**
      * Sets the resource bundle name.
      *
      * @param bundle The new bundle name.
      * @since 1.1
      */
     public void setBundle(final String bundle) {
         this.bundle = bundle;
     }
 
     /**
      * Sets the key/value.
      *
      * @param key They to access the argument.
      */
     public void setKey(final String key) {
         this.key = key;
     }
 
     /**
      * Sets the name of the dependency.
      *
      * @param name the name of the dependency.
      */
     public void setName(final String name) {
         this.name = name;
     }
 
     /**
      * Sets this argument's replacement position.
      *
      * @param position set this argument's replacement position.
      */
     public void setPosition(final int position) {
         this.position = position;
     }
 
     /**
      * Sets whether or not the key is a resource.
      *
      * @param resource If true indicates the key is a resource.
      */
     public void setResource(final boolean resource) {
         this.resource = resource;
     }
 
     /**
      * Returns a string representation of the object.
      *
      * @return a string representation of the object.
      */
     @Override
     public String toString() {
         // @formatter:off
         return new StringBuilder()
             .append("Arg: name=")
             .append(name)
             .append("  key=")
             .append(key)
             .append("  position=")
             .append(position)
             .append("  bundle=")
             .append(bundle)
             .append("  resource=")
             .append(resource)
             .append("\n")
             .toString();
         // @formatter:on
     }
 
 }