enumerationconstraint.java

你个snmp的源码

/*_############################################################################
  _##
  _##  SNMP4J-Agent - EnumerationConstraint.java
  _##
  _##  Copyright 2005-2006  Frank Fock (SNMP4J.org)
  _##
  _##  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.snmp4j.agent.mo.snmp.smi;

import org.snmp4j.smi.*;
import java.util.Arrays;
import org.snmp4j.PDU;

/**
 * The <code>EnumerationConstraint</code> class checks an <code>Integer32</code>
 * value to match a set of (enumerated) values.
 *
 * @author Frank Fock
 * @version 1.0
 */
public class EnumerationConstraint implements ValueConstraint {

  private int[] allowedValues;

  /**
   * Creates an <code>EnumerationConstraint</code> based on the specified array
   * of integer values.
   * @param allowedValues
   *    an array of allowed values.
   */
  public EnumerationConstraint(int[] allowedValues) {
    this.allowedValues = new int[allowedValues.length];
    System.arraycopy(allowedValues, 0,
                     this.allowedValues, 0, allowedValues.length);
    Arrays.sort(this.allowedValues);
  }

  public int validate(Variable variable) {
    if (variable instanceof Integer32) {
      if (Arrays.binarySearch(allowedValues,
                              ((Integer32)variable).getValue()) < 0) {
        return PDU.badValue;
      }
      return PDU.noError;
    }
    return PDU.wrongType;
  }
}