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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.query.properties;
import com.yahoo.processing.request.CompoundName;
import java.util.Map;
/**
* Property aliases which contains some hardcoded unaliasing of prefixes of
* rankfeature and rankproperty maps.
*
* @author bratseth
*/
public class QueryPropertyAliases extends PropertyAliases {
/**
* Creates an instance with a set of aliases. The given aliases will be used directly by this class.
* To make this class immutable and thread safe, relinquish ownership of the parameter map.
*/
public QueryPropertyAliases(Map<String,CompoundName> aliases) {
super(aliases);
}
@Override
protected CompoundName unalias(CompoundName nameOrAlias) {
if (nameOrAlias.first().equalsIgnoreCase("rankfeature")
|| nameOrAlias.first().equalsIgnoreCase("input")) {
if (nameOrAlias.size() > 1) // only alias the prefix
return nameOrAlias.rest().prepend("ranking", "features");
else
return nameOrAlias;
}
else if (nameOrAlias.first().equalsIgnoreCase("rankproperty")) {
if (nameOrAlias.size() > 1) // only alias the prefix
return nameOrAlias.rest().prepend("ranking", "properties");
else
return nameOrAlias;
}
// No special handling
return super.unalias(nameOrAlias);
}
}
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