openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/schema/ReferenceCounter.java

/*
 * 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--;
    }
}