org.jboss.jandex.Utils Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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.
*/
package org.jboss.jandex;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
/**
* Common utilities
*
* @author Jason T. Greene
*/
class Utils {
private static Charset UTF8 = Charset.forName("UTF-8");
static byte[] toUTF8(String string) {
return string.getBytes(UTF8);
}
static String fromUTF8(byte[] bytes) {
return new String(bytes, UTF8);
}
static List emptyOrWrap(List list) {
return list.size() == 0 ? Collections.emptyList() : Collections.unmodifiableList(list);
}
static Collection emptyOrWrap(Collection list) {
return list.size() == 0 ? Collections.emptyList() : Collections.unmodifiableCollection(list);
}
static Map emptyOrWrap(Map map) {
return map.size() == 0 ? Collections.emptyMap() : Collections.unmodifiableMap(map);
}
static List listOfCapacity(int capacity) {
return capacity > 0 ? new ArrayList(capacity) : Collections.emptyList();
}
}