org.apache.openjpa.jdbc.schema.ReferenceCounter Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. 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.
*/
package org.apache.openjpa.jdbc.schema;
import java.io.Serializable;
/**
* Some schema components count references so that unused components
* can be detected.
*
* @author Abe White
*/
class ReferenceCounter
implements Serializable {
private int _count = 0;
public int getRefCount() {
return _count;
}
public void ref() {
_count++;
}
public void deref() {
_count--;
}
}