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HTTP Part Serializers

<p>
	There is a separate set of serializers for serializing HTTP parts (query, form-data, headers, path variables, and plain-text request bodies).
	The distinction is that these are designed to serialize directly to strings based on Open-API schema information.
</p>
<p class='bpcode w800'>
	<jc>// Schema information about our part.</jc>
	HttpPartSchema schema = HttpPartSchema
		.<jsm>create</jsm>(<js>"array"</js>)
		.collectionFormat(<js>"pipes"</js>)
		.items(
			HttpPartSchema
				.<jsm>create</jsm>(<js>"array"</js>)
				.collectionFormat(<js>"csv"</js>)
				.items(
					HttpPartSchema.<jsm>create</jsm>(<js>"integer"</js>,<js>"int64"</js>)
				)
		)
		.build();

	<jc>// Our value to serialize</jc>
	Object value = <jk>new long</jk>[][]{{1,2,3},{4,5,6},{7,8,9}};

	<jc>// Produces "1,2,3|4,5,6|7,8,9"</jc>
	String output = OpenApiSerializer.<jsf>DEFAULT</jsf>.serialize(HttpPartType.<jsf>HEADER</jsf>, schema, value);
</p>
<p>
	The class hierarchy for the part serializers are:
</p>

<ul class='javatree'>
	<li class='jic'>{@link oaj.httppart.HttpPartSerializer}
	<ul>
		<li class='jc'>{@link oaj.httppart.SimplePartSerializer} - Serializes directly to strings.
		<li class='jc'>{@link oaj.uon.UonSerializer} - Serializes to UON notation.
		<ul>
			<li class='jc'>{@link oaj.oapi.OpenApiSerializer} - Serializes using Open-API schema rules.
		</ul>
	</ul>
</ul>