juneau-doc/docs/Topics/02.juneau-marshall/21.JsonDetails.html

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JSON Details

<p>
	Juneau supports converting arbitrary POJOs to and from JSON using ultra-efficient serializers and parsers.
	The JSON serializer converts POJOs directly to JSON without the need for intermediate DOM objects using a 
	highly-efficient state machine.
	Likewise, the JSON parser creates POJOs directly from JSON without the need for intermediate DOM objects. 
</p>
<p>
	The following example shows JSON for a typical bean:
</p>
<h5 class='figure'>Sample Beans</h5>
<p class='bpcode w800'>
	<jk>public class</jk> Person {
		
		<jc>// Bean properties</jc>
		<jk>public</jk> String <jf>name</jf>;
		<ja>@Swap</ja>(TemporalCalendarSwap.IsoInstant.<jk>class</jk>) <jk>public</jk> Calendar <jf>birthDate</jf>;
		<jk>public</jk> List&lt;Address&gt; <jf>addresses</jf>; 
	
		<jc>// Getters/setters omitted</jc>
	}
	
	<jk>public class</jk> Address {

		<jc>// Bean properties</jc>
		<jk>public</jk> String <jf>street</jf>, <jf>city</jf>;
		<jk>public</jk> StateEnum <jf>state</jf>;
		<jk>public int</jk> <jf>zip</jf>;
		<jk>public boolean</jk> <jf>isCurrent</jf>;

		<jc>// Getters/setters omitted</jc>
	}	
</p>
<h5 class='figure'>Sample Code</h5>
<p class='bpcode w800'>
	Person p = <jk>new</jk> Person()
		.name(<js>"John Smith"</js>)
		.birthDate(<js>"1946-08-12T00:00:00Z"</js>)
		.addresses(
			<jk>new</jk> Address() 
				.street(<js>"100 Main Street"</js>)
				.city(<js>"Anywhereville"</js>)
				.state(<jsf>NY</jsf>)
				.zip(12345)
				.isCurrent(<jk>true</jk>);
		);
</p>
<h5 class='figure'>Normal JSON</h5>
<p class='bpcode w800'>
   {
      <js>"name"</js>: <js>"John Smith"</js>, 
      <js>"birthDate"</js>: <js>"1946-08-12T00:00:00Z"</js>, 
      <js>"addresses"</js>: [
         {
            <js>"street"</js>: <js>"100 Main Street"</js>, 
            <js>"city"</js>: <js>"Anywhereville"</js>, 
            <js>"state"</js>: <js>"NY"</js>, 
            <js>"zip"</js>: 12345, 
            <js>"isCurrent"</js>: <jk>true</jk>
         }
      ]
   } 
 		</p>
<h5 class='figure'>Simplified JSON</h5>
<p class='bpcode w800'>
   {
      name: <js>'John Smith'</js>, 
      birthDate: <js>'1946-08-12T00:00:00Z'</js>, 
      addresses: [
         {
            street: <js>'100 Main Street'</js>, 
            city: <js>'Anywhereville'</js>, 
            state: <js>'NY'</js>, 
            zip: 12345, 
            isCurrent: <jk>true</jk>
         }
      ]
   } 
</p>