private void checkParameters(String attribute, String value) {
Assert.hasLength(attribute, "parameter attribute must not be empty");
Assert.hasLength(value, "parameter value must not be empty");
checkToken(attribute);
if (PARAM_QUALITY_FACTOR.equals(attribute)) {
value = unquote(value);
double d = Double.parseDouble(value);
Assert.isTrue(
d >= 0D && d <= 1D,
"Invalid quality value \"" + value + "\": should be between 0.0 and 1.0");
} else if (PARAM_CHARSET.equals(attribute)) {
value = unquote(value);
Charset.forName(value);
} else if (!isQuotedString(value)) {
checkToken(value);
}
}
/**
* Create a new {@code MediaType} for the given type, subtype, and parameters.
*
* @param type the primary type
* @param subtype the subtype
* @param parameters the parameters, may be <code>null</code>
* @throws IllegalArgumentException if any of the parameters contain illegal characters
*/
public MediaType(String type, String subtype, Map<String, String> parameters) {
Assert.hasLength(type, "'type' must not be empty");
Assert.hasLength(subtype, "'subtype' must not be empty");
checkToken(type);
checkToken(subtype);
this.type = type.toLowerCase(Locale.ENGLISH);
this.subtype = subtype.toLowerCase(Locale.ENGLISH);
if (!CollectionUtils.isEmpty(parameters)) {
Map<String, String> m =
new LinkedCaseInsensitiveMap<String>(parameters.size(), Locale.ENGLISH);
for (Map.Entry<String, String> entry : parameters.entrySet()) {
String attribute = entry.getKey();
String value = entry.getValue();
checkParameters(attribute, value);
m.put(attribute, unquote(value));
}
this.parameters = Collections.unmodifiableMap(m);
} else {
this.parameters = Collections.emptyMap();
}
}