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.Resource; 022 import net.dpml.library.ResourceNotFoundException; 023 024 /** 025 * Simple value filter. 026 * 027 * @author <a href="http://www.dpml.net">Digital Product Meta Library</a> 028 * @version 1.1.2 029 */ 030 public class SimpleFilterDirective extends FilterDirective 031 { 032 private final String m_value; 033 034 /** 035 * Creation of a new anonymous resource directive. 036 * @param token the filter token 037 * @param value the substitution value 038 */ 039 public SimpleFilterDirective( String token, String value ) 040 { 041 super( token ); 042 m_value = value; 043 } 044 045 /** 046 * Return the filter value. 047 * @param resource the enclosing resource 048 * @return the resolved value 049 * @exception ResourceNotFoundException (never thrown) 050 */ 051 public String getValue( Resource resource ) throws ResourceNotFoundException 052 { 053 return resource.resolve( m_value ); 054 } 055 056 /** 057 * Compare this object with another for equality. 058 * @param other the other object 059 * @return true if equal 060 */ 061 public boolean equals( Object other ) 062 { 063 if( super.equals( other ) && ( other instanceof SimpleFilterDirective ) ) 064 { 065 SimpleFilterDirective directive = (SimpleFilterDirective) other; 066 return m_value.equals( directive.m_value ); 067 } 068 else 069 { 070 return false; 071 } 072 } 073 074 /** 075 * Compute the hash value. 076 * @return the hashcode value 077 */ 078 public int hashCode() 079 { 080 int hash = super.hashCode(); 081 hash ^= super.hashValue( m_value ); 082 return hash; 083 } 084 }