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As of Camel 2.10
When marshalling a POJO to JSON you might want to exclude certain fields from the JSON output. With Jackson you can use JSON views to accomplish this. First create one or more marker classes.
| Wiki Markup |
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{snippet:id=marker|lang=java|url=camel/trunk/components/camel-jackson/src/test/java/org/apache/camel/component/jackson/Views.java} |
Use the marker classes with the
@JsonView annotation to include/exclude certain fields. The annotation also works on getters.
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{snippet:id=jsonview|lang=java|url=camel/trunk/components/camel-jackson/src/test/java/org/apache/camel/component/jackson/TestPojoView.java} |
Finally use the Camel
JacksonDataFormat to marshall the above POJO to JSON.
| Wiki Markup |
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{snippet:id=format|lang=java|url=camel/trunk/components/camel-jackson/src/test/java/org/apache/camel/component/jackson/JacksonMarshalViewTest.java} |
Note that the
weight height field is missing in the resulting JSON:
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{"age":30, "heightweight":19070}
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The GSON library supports a similar feature through the notion of ExclusionStrategies:
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{snippet:id=strategy|lang=java|url=camel/trunk/components/camel-gson/src/test/java/org/apache/camel/component/gson/GsonMarshalExclusionTest.java} |
The
GsonDataFormat accepts an
ExclusionStrategy in its constructor:
| Wiki Markup |
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{snippet:id=format|lang=java|url=camel/trunk/components/camel-gson/src/test/java/org/apache/camel/component/gson/GsonMarshalExclusionTest.java} |
The line above will exclude fields annotated with
@ExcludeAge when marshalling to JSON.
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