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Merge pull request #174 from garyrussell/INT-2207

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Add Documentation for JSON Transformers
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Mark Fisher
2011-11-10 14:32:22 -05:00
parent e44946391b 81f7434886
commit 7e30f7df9e
1 changed files with 38 additions and 0 deletions
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38
docs/src/reference/docbook/transformer.xml
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@@ -189,6 +189,44 @@ public class Kid {
Also, if using the 'ref' attribute, you must point to a 'prototype' scoped bean, otherwise
a BeanCreationException will be thrown. 
</note>
<para>
<emphasis>JSON Transformers</emphasis>
</para>
<para>
<emphasis>Object to JSON</emphasis> and <emphasis>JSON to Object</emphasis> transformers are provided.
</para>
<para>
<programlisting language="xml"><![CDATA[<int:object-to-json-transformer input-channel="objectMapperInput"/>]]></programlisting>
<programlisting language="xml"><![CDATA[<int:json-to-object-transformer input-channel="objectMapperInput"
type="foo.MyDomainObject"/>]]></programlisting>
</para>
<para>
These use a vanilla Jackson ObjectMapper by default. If you wish to customize the ObjectMapper (for example,
to configure the 'ALLOW_COMMENTS' feature when parsing JSON), you can supply a reference to your custom ObjectMapper bean using
the object-mapper attribute.
</para>
<para>
<programlisting language="xml"><![CDATA[<int:json-to-object-transformer input-channel="objectMapperInput"
type="foo.MyDomainObject" object-mapper="customObjectMapper"/>]]></programlisting>
</para>
<para>
You may wish to consider using a FactoryBean or simple factory method to create the ObjectMapper with
the required characteristics.
</para>
<para>
<programlisting language="java"><![CDATA[public class ObjectMapperFactory {
public static ObjectMapper getMapper() {
ObjectMapper mapper = new ObjectMapper();
mapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true);
return mapper;
}
}]]></programlisting>
</para>
<para>
<programlisting language="xml"><![CDATA[<bean id="customObjectMapper" class="foo.ObjectMapperFactory"
factory-method="getMapper"/>]]></programlisting>
</para>
</section>
<section id="transformer-annotation">