LocalProcessController.java 文件源码

/**
 * Builds an optional QueryExp to aid in matching the correct MBean using 
 * additional attributes with the specified values. Returns null if no
 * attributes and values were specified during construction.
 * 
 * @param attributes the names of additional MBean attributes to compare with expected values
 * @param values the expected values of the specified MBean attributes
 *
 * @return optional QueryExp to aid in matching the correct MBean 
 */
private QueryExp buildOptionalQueryExp(final String[] attributes, final Object[] values) {
  QueryExp queryExp = null;
  for (int i = 0; i < attributes.length; i++) {
    if (values[i] instanceof Boolean) {
      if (queryExp == null) { 
        queryExp = Query.eq(
            Query.attr(attributes[i]), 
            Query.value(((Boolean) values[i])));
      } else {
        queryExp = Query.and(queryExp, 
            Query.eq(Query.attr(attributes[i]), 
            Query.value(((Boolean) values[i]))));
      }
    } else if (values[i] instanceof Number) {
      if (queryExp == null) { 
        queryExp = Query.eq(
            Query.attr(attributes[i]), 
            Query.value((Number)values[i]));
      } else {
        queryExp = Query.and(queryExp, 
            Query.eq(Query.attr(attributes[i]), 
            Query.value((Number)values[i])));
      }
    } else if (values[i] instanceof String) {
      if (queryExp == null) { 
        queryExp = Query.eq(
            Query.attr(attributes[i]), 
            Query.value((String)values[i]));
      } else {
        queryExp = Query.and(queryExp, 
            Query.eq(Query.attr(attributes[i]), 
            Query.value((String)values[i])));
      }
    }
  }
  return queryExp;
}