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.impl; 016 017 import org.apache.hivemind.Location; 018 import org.apache.hivemind.Resource; 019 020 /** 021 * Implementation of the {@link org.apache.hivemind.Location} interface. 022 * 023 * @author Howard Lewis Ship 024 */ 025 public final class LocationImpl implements Location 026 { 027 private Resource _resource; 028 private int _lineNumber = -1; 029 private int _columnNumber = -1; 030 031 public LocationImpl(Resource resource) 032 { 033 _resource = resource; 034 } 035 036 public LocationImpl(Resource resource, int lineNumber) 037 { 038 this(resource); 039 040 _lineNumber = lineNumber; 041 } 042 043 public LocationImpl(Resource resource, int lineNumber, int columnNumber) 044 { 045 this(resource); 046 047 _lineNumber = lineNumber; 048 _columnNumber = columnNumber; 049 } 050 051 public Resource getResource() 052 { 053 return _resource; 054 } 055 056 public int getLineNumber() 057 { 058 return _lineNumber; 059 } 060 061 public int getColumnNumber() 062 { 063 return _columnNumber; 064 } 065 066 public int hashCode() 067 { 068 return ((237 + _resource.hashCode()) << 3 + _lineNumber) << 3 + _columnNumber; 069 } 070 071 public boolean equals(Object other) 072 { 073 if (!(other instanceof Location)) 074 return false; 075 076 Location l = (Location) other; 077 078 if (_lineNumber != l.getLineNumber()) 079 return false; 080 081 if (_columnNumber != l.getColumnNumber()) 082 return false; 083 084 return _resource.equals(l.getResource()); 085 } 086 087 public String toString() 088 { 089 if (_lineNumber <= 0 && _columnNumber <= 0) 090 return _resource.toString(); 091 092 StringBuffer buffer = new StringBuffer(_resource.toString()); 093 094 if (_lineNumber > 0) 095 { 096 buffer.append(", line "); 097 buffer.append(_lineNumber); 098 } 099 100 if (_columnNumber > 0) 101 { 102 buffer.append(", column "); 103 buffer.append(_columnNumber); 104 } 105 106 return buffer.toString(); 107 } 108 }