org.openstack4j.openstack.storage.object.functions.MapWithoutMetaPrefixFunction Maven / Gradle / Ivy
package org.openstack4j.openstack.storage.object.functions;
import java.util.Map;
import com.google.common.base.Function;
import com.google.common.collect.ImmutableMap;
/**
* Transforms a Swift Metadata Map into a Map without the meta prefix as key values
*
* @author Jeremy Unruh
*/
public class MapWithoutMetaPrefixFunction implements Function, Map> {
public static final MapWithoutMetaPrefixFunction INSTANCE = new MapWithoutMetaPrefixFunction();
@Override
public Map apply(Map input) {
ImmutableMap.Builder metadata = ImmutableMap.builder();
for (String key : input.keySet()) {
if (key == null) {
continue;
}
int idx = key.indexOf("-Meta-");
if (idx > -1) {
metadata.put(key.substring(idx + 6), input.get(key));
}
if (key.indexOf("X-") > -1) {
metadata.put(key, input.get(key));
}
}
return metadata.build();
}
}