CounterValue.java

/*
 * Copyright (c) 2011,2013 Big Switch Networks, Inc.
 *
 * Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/legal/epl-v10.html
 *
 * 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.
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *
 *    Originally created by David Erickson, Stanford University 
 *
 *    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.sdnplatform.counter;

/**
 * The class defines the counter value type and value
 * 
 * @author Kanzhe
 *
 */
public class CounterValue { 
  public enum CounterType {
      LONG,
      DOUBLE
  }
  
  protected CounterType type; 
  protected long longValue;
  protected double doubleValue;
  
  public CounterValue(CounterType type) {
    this.type = CounterType.LONG;
    this.longValue = 0;    
    this.doubleValue = 0.0;
  }
  
  /**
   * This method is only applicable to type long.
   * Setter() should be used for type double
   */
  public void increment(long delta) {
      if (this.type == CounterType.LONG) {
          this.longValue += delta;
      } else {
          throw new IllegalArgumentException("Invalid counter type. This counter is not a long type.");
      }
  }
  
  public void setLongValue(long value) {
      if (this.type == CounterType.LONG) {
          this.longValue = value;
      } else {
          throw new IllegalArgumentException("Invalid counter type. This counter is not a long type.");
      }
  }
  
  public void setDoubleValue(double value) {
      if (this.type == CounterType.DOUBLE) {
          this.doubleValue = value;
      } else {
          throw new IllegalArgumentException("Invalid counter type. This counter is not a double type.");
      }
  }
  
  public long getLong() {
      if (this.type == CounterType.LONG) {
          return this.longValue;
      } else {
          throw new IllegalArgumentException("Invalid counter type. This counter is not a long type.");
      }
  }
  
  public double getDouble() {
      if (this.type == CounterType.DOUBLE) {
          return this.doubleValue;
      } else {
          throw new IllegalArgumentException("Invalid counter type. This counter is not a double type.");
      }
  }
  

  public CounterType getType() {
    return this.type;
  }
  
  public String toString() {
    String ret = "{type: ";
    if (this.type == CounterType.DOUBLE) {
        ret += "Double" + ", value: " + this.doubleValue + "}";
    } else {
        ret += "Long" + ", value: " + this.longValue + "}";
    }
    return ret;
  }


}