/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. The ASF licenses this file to You
* under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License. For additional information regarding
* copyright in this work, please see the NOTICE file in the top level
* directory of this distribution.
*/
package org.apache.abdera.i18n.iri;
import java.util.HashMap;
import java.util.Map;
import org.apache.abdera.i18n.iri.DefaultScheme;
import org.apache.abdera.i18n.iri.HttpScheme;
import org.apache.abdera.i18n.iri.HttpsScheme;
import org.apache.abdera.i18n.iri.Scheme;
import org.apache.abdera.i18n.iri.SchemeRegistry;
/**
* Static registry of custom IRI schemes.
*/
public final class SchemeRegistry {
private static SchemeRegistry registry;
public static synchronized SchemeRegistry getInstance() {
if (registry == null) registry = new SchemeRegistry();
return registry;
}
private final Map<String,Scheme> schemes;
SchemeRegistry() {
schemes = new HashMap<String,Scheme>();
schemes.put(HttpScheme.NAME, new HttpScheme());
schemes.put(HttpsScheme.NAME, new HttpsScheme());
}
@SuppressWarnings("unchecked")
public synchronized boolean register(
String schemeClass)
throws ClassNotFoundException,
IllegalAccessException,
InstantiationException {
Class<Scheme> klass =
(Class<Scheme>) Thread.currentThread()
.getContextClassLoader().loadClass(schemeClass);
return register(klass);
}
public synchronized boolean register(
Class<Scheme> schemeClass)
throws IllegalAccessException,
InstantiationException {
Scheme scheme = schemeClass.newInstance();
return register(scheme);
}
public synchronized boolean register(Scheme scheme) {
String name = scheme.getName();
if (schemes.get(name) == null) {
schemes.put(name.toLowerCase(), scheme);
return true;
} else return false;
}
public Scheme getScheme(String scheme) {
if (scheme == null) return null;
Scheme s = schemes.get(scheme.toLowerCase());
return (s != null) ? s : new DefaultScheme(scheme);
}
}