ZeroCostModel.java

/*
 * Copyright to the original author or authors.
 *
 * 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.rioproject.costmodel;

/**
 * The ZeroCostModel provides a default implementation of a
 * {@link ResourceCostModel}.
 *
 * @author Dennis Reedy
 */
public class ZeroCostModel implements ResourceCostModel {
    static final long serialVersionUID = 1L;
    
    /**
     * Implemented to meet ResourceCostModel contract
     * 
     * @see ResourceCostModel#addTimeBoundary
     */
    public void addTimeBoundary(TimeBoundary ignored) {
    }

    /**
     * @see ResourceCostModel#getCostPerUnit
     */
    public double getCostPerUnit(long duration) {
        return(0.0);
    }

    /**
     * @see ResourceCostModel#getDescription
     */
    public String getDescription() {
        return("Zero Cost");
    }

}