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. 014 015 package org.apache.hivemind.schema.rules; 016 017 import org.apache.hivemind.Element; 018 import org.apache.hivemind.schema.SchemaProcessor; 019 import org.apache.hivemind.util.InstanceCreationUtils; 020 021 /** 022 * Basic {@link org.apache.hivemind.schema.Rule} for creating a new object. Created from the the 023 * <code><create-object></code> element. Generally, this is the first rule in a sequence of 024 * rules. 025 * 026 * @author Howard Lewis Ship 027 */ 028 public class CreateObjectRule extends BaseRule 029 { 030 private String _className; 031 032 public CreateObjectRule() 033 { 034 } 035 036 public CreateObjectRule(String className) 037 { 038 _className = className; 039 } 040 041 /** 042 * Creates the new object and pushes it onto the processor's stack. If the object implement 043 * {@link org.apache.hivemind.LocationHolder} then the {@link org.apache.hivemind.Location} of 044 * the element is assigned to the object. 045 */ 046 public void begin(SchemaProcessor processor, Element element) 047 { 048 Object object = InstanceCreationUtils.createInstance( 049 processor.getDefiningModule(), 050 _className, 051 element.getLocation()); 052 053 processor.push(object); 054 } 055 056 /** 057 * Pops the object off of the processor's stack. 058 */ 059 public void end(SchemaProcessor processor, Element element) 060 { 061 processor.pop(); 062 } 063 064 public String getClassName() 065 { 066 return _className; 067 } 068 069 public void setClassName(String string) 070 { 071 _className = string; 072 } 073 074 }