/*
* Copyright (C) 2015 Red Hat, Inc. and/or its affiliates.
*
* 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.errai.common.rebind;
import com.google.common.collect.HashMultiset;
import com.google.common.collect.Multiset;
/**
* To be used in conjunction with {@link NameUtil} for generating unique
* identifier names for fully qualified class names.
*
* @author Max Barkley <mbarkley@redhat.com>
*/
public class UniqueNameGenerator {
private final Multiset<String> usedNames = HashMultiset.create();
/**
* @param name
* An identifier that does not end with an underscore followed by an
* integer. If the name has such an ending, the return value is not
* guaranteed to be unique.
* @return A unique name (will have a number appended to the end if the given
* name has been used before).
*/
public String uniqueName(final String name) {
final String uniqueName;
final int collisions = usedNames.count(name);
if (collisions > 0) {
uniqueName = name + "_" + String.valueOf(collisions);
} else {
uniqueName = name;
}
usedNames.add(name);
return uniqueName;
}
}