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012// ***************************************************************************************************************************
013package org.apache.juneau.swap;
014
015import org.apache.juneau.*;
016import org.apache.juneau.collections.*;
017
018/**
019 * Abstract subclass for object swaps that swap objects for object maps.
020 *
021 * <h5 class='section'>Example:</h5>
022 * <p class='bjava'>
023 *    <jc>// A swap that converts beans into generic maps.</jc>
024 *    <jk>public class</jk> MyBeanSwap <jk>extends</jk> MapSwap&lt;<jk>byte</jk>[]&gt; {
025 *
026 *       <ja>@Override</ja>
027 *       <jk>public</jk> JsonMap swap(BeanSession <jv>session</jv>, MyBean <jv>bean</jv>) <jk>throws</jk> Exception {
028 *          <jk>return</jk> JsonMap.<jsm>of</jsm>(<js>"foo"</js>, <jv>bean</jv>.getFoo());
029 *       }
030 *
031 *       <ja>@Override</ja>
032 *       <jk>public</jk> MyBean unswap(BeanSession <jv>session</jv>, JsonMap <jv>map</jv>, ClassMeta&lt;?&gt; <jv>hint</jv>) <jk>throws</jk> Exception {
033 *          <jk>return</jk> new</jk> MyBean(<jv>map</jv>.get(<js>"foo"</js>));
034 *       }
035 *    }
036 *
037 *    <jc>// Use it to serialize a byte array.</jc>
038 *    WriterSerializer <jv>serializer</jv> = JsonSerializer.<jsm>create</jsm>().simple().swaps(MyBeanSwap.<jk>class</jk>).build();
039 *    String <jv>json</jv> = <jv>serializer</jv>.serialize(<jk>new</jk> MyBean(<js>"bar"</js>));  <jc>// Produces "{foo:'bar'}"</jc>
040 * </p>
041 *
042 * <h5 class='section'>See Also:</h5><ul>
043 *    <li class='link'><a class="doclink" href="../../../../index.html#jm.Swaps">Swaps</a>
044 * </ul>
045 *
046 * @param <T> The normal form of the class.
047 */
048public abstract class MapSwap<T> extends ObjectSwap<T,JsonMap> {
049
050   @Override /* ObjectSwap */
051   public JsonMap swap(BeanSession session, T o) throws Exception {
052      return super.swap(session, o);
053   }
054
055   @Override /* ObjectSwap */
056   public T unswap(BeanSession session, JsonMap f, ClassMeta<?> hint) throws Exception {
057      return super.unswap(session, f, hint);
058   }
059}