code: public List<CmsResource> changeResourcesInFolderWithProperty(
          String resourcename,
          String property,
          String oldValue,
          String newValue,
          boolean recursive)
      throws CmsException {
  
          CmsResource resource = readResource(resourcename, CmsResourceFilter.IGNORE_EXPIRATION);
          return m_securityManager.changeResourcesInFolderWithProperty(
              m_context,
              resource,
              property,
              oldValue,
              newValue,
              recursive);
      }
docs: Returns a list with all sub resources of a given folder that have set the given property,
  matching the current property's value with the given old value and replacing it by a given new value.<p>
  
  @param resourcename the name of the resource to change the property value
  @param property the name of the property to change the value
  @param oldValue the old value of the property, can be a regular expression
  @param newValue the new value of the property
  @param recursive if true, change recursively all property values on sub-resources (only for folders)
  
  @return a list with the <code>{@link CmsResource}</code>'s where the property value has been changed
  
  @throws CmsException if operation was not successful