1 // Copyright 2004, 2005 The Apache Software Foundation 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package org.apache.hivemind.schema; 16 17 import org.apache.hivemind.Element; 18 import org.apache.hivemind.Locatable; 19 20 /** 21 * Rules associated with {@link org.apache.hivemind.schema.Schema} elements. 22 * As the {@link org.apache.hivemind.schema.SchemaProcessor} 23 * works through the {@link org.apache.hivemind.Element} hiearchy, it invokes 24 * methods on the Rules. 25 * 26 * @author Howard M. Lewis Ship 27 */ 28 public interface Rule extends Locatable 29 { 30 /** 31 * Begin rules are fired first, in order. All rules are invoked, and then the 32 * SchemaProcessor recurses into the elements contained within the element. 33 */ 34 public void begin(SchemaProcessor processor, Element element); 35 36 /** 37 * End rules are fired last, in inverse order. 38 */ 39 public void end(SchemaProcessor processor, Element element); 40 } 41