/**
* Returns the extension if the extension name exists otherwise returns null
*
* @param extensionName
* @return the found extension or null if it is not found
*/
public SubTypeExtension getExtension(String extensionName) {
SubTypeExtension ext = null;
for (SubTypeExtension e : extensions) {
if (e.getName().equals(extensionName)) {
ext = e;
}
}
return ext;
}
/**
* Add an extension - this changes the data to reflect an extension for this sub type.
*
* @param extension
*/
public void addExtension(SubTypeExtension extension) throws DuplicateNameException {
if (getExtension(extension.getName()) != null) {
throw new DuplicateNameException(
"Subtype extension for subtype " + this + " with name already exists",
extension.getName());
}
extension.setSubType(this);
extension.setMimeType(
getTopMediaType().getName() + SubTypeExtension.MIME_TYPE_SEPERATOR + getName());
extensions.add(extension);
}
/**
* Returns the extension if the id exists otherwise returns null - null is always returned if the
* id is 0
*
* @param extensionName
* @return the found extension or null if it is not found
*/
public SubTypeExtension getExtension(Long id) {
SubTypeExtension ext = null;
if (id == 0) {
return ext;
}
for (SubTypeExtension e : extensions) {
if (e.getId().equals(id)) {
ext = e;
}
}
return ext;
}
/**
* Remove an extension from this subtype
*
* @param extension to remove
* @return true if the extension is removed
*/
private boolean removeExtension(SubTypeExtension extension) {
extension.setSubType(null);
return extensions.remove(extension);
}