/*

  * Copyright 2012-2013 smartics, Kronseder & Reiner GmbH

  *

  * 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.

  */

 package de.smartics.properties.api.config.domain;

 import java.io.Serializable;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.List;

 import javax.annotation.concurrent.NotThreadSafe;

 /**

  * The set of unknown properties.

  */

 @NotThreadSafe

 public final class UnknownProperties implements Serializable

 {

   // ********************************* Fields *********************************

   // --- constants ------------------------------------------------------------

   /**

    * The class version identifier.

    */

   private static final long serialVersionUID = 1L;

   // --- members --------------------------------------------------------------

   /**

    * The list of unknown properties.

    *

    * @serial

    */

   private final List<Property> properties =

       new ArrayList<Property>();

   // ****************************** Initializer *******************************

   // ****************************** Constructors ******************************

   /**

    * Default constructor.

    */

   public UnknownProperties()

   {

   }

   // ****************************** Inner Classes *****************************

   // ********************************* Methods ********************************

   // --- init -----------------------------------------------------------------

   // --- get&set --------------------------------------------------------------

   // --- business -------------------------------------------------------------

   /**

    * Adds the unknown properties to the list.

    *

    * @param property the property to add.

    */

   public void add(final Property property)

   {

     properties.add(property);

   }

   /**

    * Returns a reference to the list on unknown properties.

    *

    * @return a reference to the list on unknown properties.

    */

   public List<Property> getProperties()

   {

     return Collections.unmodifiableList(properties);

   }

   /**

    * Checks if the container contains at least one property.

    *

    * @return <code>true</code> if there is no property, <code>false</code>

    *         otherwise.

    */

   public boolean isEmpty()

   {

     return properties.isEmpty();

   }

   // --- object basics --------------------------------------------------------

   /**

    * Returns the string representation of the object.

    *

    * @return the string representation of the object.

    */

   @Override

   public String toString()

   {

     final StringBuilder buffer = new StringBuilder();

     for (final Property property : properties)

     {

       buffer.append(property).append(' ');

     }

     return buffer.toString();

   }

 }