item_saver_with_attributes_map.java

public class ItemSaver {
  private String valueToSave;
  public ItemSaver(String valueToSave) {
    this.valueToSave = valueToSave;
  }

  public void doSomething(String attributeName, Item item) {
    Set<String> attributeValues = item.getAttributes().get(attributeName);
    for (String value : attributeValues) {
      if (value.equals(valueToSave)) {
        doSomethingElse();
      }
    }
  }

  private void doSomethingElse() {
  }
}