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DataCenterTypeInfoResolver.java
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DataCenterTypeInfoResolver.java
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package com.netflix.discovery.converters.jackson;
import com.fasterxml.jackson.databind.DatabindContext;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.jsontype.impl.ClassNameIdResolver;
import com.fasterxml.jackson.databind.type.TypeFactory;
import com.netflix.appinfo.AmazonInfo;
import com.netflix.appinfo.DataCenterInfo;
import com.netflix.appinfo.MyDataCenterInfo;
/**
* @author Tomasz Bak
*/
public class DataCenterTypeInfoResolver extends ClassNameIdResolver {
/**
* This phantom class name is kept for backwards compatibility. Internally it is mapped to
* {@link MyDataCenterInfo} during the deserialization process.
*/
public static final String MY_DATA_CENTER_INFO_TYPE_MARKER = "com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo";
public DataCenterTypeInfoResolver() {
super(TypeFactory.defaultInstance().constructType(DataCenterInfo.class), TypeFactory.defaultInstance());
}
@Override
public JavaType typeFromId(DatabindContext context, String id) {
if (MY_DATA_CENTER_INFO_TYPE_MARKER.equals(id)) {
return context.getTypeFactory().constructType(MyDataCenterInfo.class);
}
return super.typeFromId(context, id);
}
@Override
public String idFromValue(Object value) {
if (value.getClass().equals(AmazonInfo.class)) {
return AmazonInfo.class.getName();
}
return MY_DATA_CENTER_INFO_TYPE_MARKER;
}
}