001 /* 002 * Copyright 2005 Stephen J. McConnell 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 013 * implied. 014 * 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019 package net.dpml.library.info; 020 021 import net.dpml.library.Data; 022 023 import java.util.Properties; 024 025 import org.w3c.dom.Element; 026 027 /** 028 * Base class for a data directives. 029 * 030 * @author <a href="http://www.dpml.net">Digital Product Meta Library</a> 031 * @version 1.1.0 032 */ 033 public class DataDirective extends AbstractDirective implements Data 034 { 035 private final Element m_element; 036 037 /** 038 * Creation of a new data directive using a DOM element as the 039 * datastructure definition. 040 * @param element the DOM element 041 */ 042 public DataDirective( Element element ) 043 { 044 super(); 045 m_element = element; 046 } 047 048 /** 049 * Creation of a new data directive using a supplied properties argument. 050 * @param properties associated properties 051 */ 052 public DataDirective( Properties properties ) 053 { 054 super( properties ); 055 m_element = null; 056 } 057 058 /** 059 * Return the datatype element. 060 * @return the DOM element 061 */ 062 public Element getElement() 063 { 064 return m_element; 065 } 066 067 /** 068 * Compare this object with another for equality. 069 * @param other the other object 070 * @return true if equal 071 */ 072 public boolean equals( Object other ) 073 { 074 if( super.equals( other ) && ( other instanceof DataDirective ) ) 075 { 076 DataDirective object = (DataDirective) other; 077 return equals( m_element, object.m_element ); 078 } 079 else 080 { 081 return false; 082 } 083 } 084 085 /** 086 * Compute the hash value. 087 * @return the hascode value 088 */ 089 public int hashCode() 090 { 091 int hash = super.hashCode(); 092 hash ^= hashValue( m_element ); 093 return hash; 094 } 095 }