001// Copyright 2004, 2005 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.hivemind.parse; 016 017import java.util.HashSet; 018import java.util.Iterator; 019import java.util.Set; 020 021/** 022 * Used by {@link org.apache.hivemind.parse.DescriptorParser} to 023 * track which attributes are expected for an element, and which are required. 024 * 025 * @author Howard Lewis Ship 026 */ 027public class ElementParseInfo 028{ 029 private Set _knownAttributes = new HashSet(); 030 private Set _requiredAttributes = new HashSet(); 031 032 public void addAttribute(String name, boolean required) 033 { 034 _knownAttributes.add(name); 035 036 if (required) 037 _requiredAttributes.add(name); 038 } 039 040 public boolean isKnown(String attributeName) 041 { 042 return _knownAttributes.contains(attributeName); 043 } 044 045 /** 046 * Returns all the required attribute names as 047 * an Iterator (of String). 048 */ 049 public Iterator getRequiredNames() 050 { 051 return _requiredAttributes.iterator(); 052 } 053}