/**
* Return the set of <code>Extension</code> objects representing optional packages that are
* required by the application associated with the specified <code>Manifest</code>.
*
* @param manifest Manifest to be parsed
* @return List of required extensions, or null if the application does not require any extensions
*/
private ArrayList<Extension> getRequiredExtensions(Manifest manifest) {
Attributes attributes = manifest.getMainAttributes();
String names = attributes.getValue("Extension-List");
if (names == null) return null;
ArrayList<Extension> extensionList = new ArrayList<Extension>();
names += " ";
while (true) {
int space = names.indexOf(' ');
if (space < 0) break;
String name = names.substring(0, space).trim();
names = names.substring(space + 1);
String value = attributes.getValue(name + "-Extension-Name");
if (value == null) continue;
Extension extension = new Extension();
extension.setExtensionName(value);
extension.setImplementationURL(attributes.getValue(name + "-Implementation-URL"));
extension.setImplementationVendorId(attributes.getValue(name + "-Implementation-Vendor-Id"));
String version = attributes.getValue(name + "-Implementation-Version");
extension.setImplementationVersion(version);
extension.setSpecificationVersion(attributes.getValue(name + "-Specification-Version"));
extensionList.add(extension);
}
return extensionList;
}
/**
* Return the set of <code>Extension</code> objects representing optional packages that are
* bundled with the application associated with the specified <code>Manifest</code>.
*
* @param manifest Manifest to be parsed
* @return List of available extensions, or null if the web application does not bundle any
* extensions
*/
private ArrayList<Extension> getAvailableExtensions(Manifest manifest) {
Attributes attributes = manifest.getMainAttributes();
String name = attributes.getValue("Extension-Name");
if (name == null) return null;
ArrayList<Extension> extensionList = new ArrayList<Extension>();
Extension extension = new Extension();
extension.setExtensionName(name);
extension.setImplementationURL(attributes.getValue("Implementation-URL"));
extension.setImplementationVendor(attributes.getValue("Implementation-Vendor"));
extension.setImplementationVendorId(attributes.getValue("Implementation-Vendor-Id"));
extension.setImplementationVersion(attributes.getValue("Implementation-Version"));
extension.setSpecificationVersion(attributes.getValue("Specification-Version"));
extensionList.add(extension);
return extensionList;
}