com.anaptecs.spring.base.serializers.DataUnitDeserializer Maven / Gradle / Ivy
/*
* anaptecs GmbH, Ricarda-Huch-Str. 71, 72760 Reutlingen, Germany
*
* Copyright 2004 - 2019. All rights reserved.
*/
package com.anaptecs.spring.base.serializers;
import java.io.IOException;
import com.anaptecs.spring.base.DataUnit;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.TextNode;
/**
* Class implements a JSON / Jackson deserializer for class DataUnit.
*/
public class DataUnitDeserializer extends JsonDeserializer {
@Override
public DataUnit deserialize( JsonParser pParser, DeserializationContext pContext ) throws IOException {
// Parse JSON content.
JsonNode lNode = pParser.getCodec().readTree(pParser);
// We expect that enumerations are always serialized as plain text which will result in a TextNode.
if (lNode instanceof TextNode) {
DataUnit lLiteral;
try {
String lLiteralName = lNode.asText();
lLiteral = DataUnit.valueOf(lLiteralName);
}
// Literal is unknown.
catch (IllegalArgumentException e) {
lLiteral = DataUnit.UNKNOWN;
}
return lLiteral;
}
// Node is not a TextNode
else {
throw new IOException(
"Unable to deserialize object of type ''DataUnit''. Expected text node but received other type of JSON content. Current JSON node ''"
+ lNode.toString() + "'' is of type ''" + lNode.getClass().getName() + "''.");
}
}
}