com.beust.jcommander.FuzzyMap Maven / Gradle / Ivy
package com.beust.jcommander;
import com.beust.jcommander.internal.Maps;
import java.util.Map;
/**
* Helper class to perform fuzzy key look ups: looking up case insensitive or
* abbreviated keys.
*/
public class FuzzyMap {
interface IKey {
String getName();
}
public static V findInMap(Map map, IKey name,
boolean caseSensitive, boolean allowAbbreviations) {
if (allowAbbreviations) {
return findAbbreviatedValue(map, name, caseSensitive);
} else {
if (caseSensitive) {
return map.get(name);
} else {
for (IKey c : map.keySet()) {
if (c.getName().equalsIgnoreCase(name.getName())) {
return map.get(c);
}
}
}
}
return null;
}
private static V findAbbreviatedValue(Map map, IKey name,
boolean caseSensitive) {
String string = name.getName();
Map results = Maps.newHashMap();
for (IKey c : map.keySet()) {
String n = c.getName();
boolean match = (caseSensitive && n.startsWith(string))
|| ((! caseSensitive) && n.toLowerCase().startsWith(string.toLowerCase()));
if (match) {
results.put(n, map.get(c));
}
}
V result;
if (results.size() > 1) {
throw new ParameterException("Ambiguous option: " + name
+ " matches " + results.keySet());
} else if (results.size() == 1) {
result = results.values().iterator().next();
} else {
result = null;
}
return result;
}
}