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Java > Open Source Codes > com > puppycrawl > tools > checkstyle > checks > usage > transmogrify > Span


1 //Transmogrify License
2 //
3 //Copyright (c) 2001, ThoughtWorks, Inc.
4 //All rights reserved.
5 //Redistribution and use in source and binary forms, with or without
6 //modification, are permitted provided that the following conditions
7 //are met:
8 //- Redistributions of source code must retain the above copyright notice,
9 //this list of conditions and the following disclaimer.
10 //- Redistributions in binary form must reproduce the above copyright
11 //notice, this list of conditions and the following disclaimer in the
12 //documentation and/or other materials provided with the distribution.
13 //Neither the name of the ThoughtWorks, Inc. nor the names of its
14 //contributors may be used to endorse or promote products derived from this
15 //software without specific prior written permission.
16 //THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 //"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 //TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 //PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
20 //CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21 //EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 //PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 //OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 //WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
25 //OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
26 //ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28 package com.puppycrawl.tools.checkstyle.checks.usage.transmogrify;
29
30 public class Span {
31
32   private int _startLine;
33   private int _startColumn;
34   private int _endLine;
35   private int _endColumn;
36
37   public Span() {}
38
39   public Span(int startLine, int startColumn, int endLine, int endColumn) {
40     setStart(startLine, startColumn);
41     setEnd(endLine, endColumn);
42   }
43
44   public Span( Span span ) {
45     this( span.getStartLine(), span.getStartColumn(),
46           span.getEndLine(), span.getEndColumn() );
47   }
48
49   public void setStart(int startLine, int startColumn) {
50     _startLine = startLine;
51     _startColumn = startColumn;
52   }
53
54   public void setEnd(int endLine, int endColumn) {
55     _endLine = endLine;
56     _endColumn = endColumn;
57   }
58
59   public int getStartLine() {
60     return _startLine;
61   }
62
63   public int getStartColumn() {
64     return _startColumn;
65   }
66
67   public int getEndLine() {
68     return _endLine;
69   }
70
71   public int getEndColumn() {
72     return _endColumn;
73   }
74
75   public boolean contains( Span span ) {
76     return ( contains(span.getStartLine(), span.getStartColumn())
77              && contains( span.getEndLine(), span.getEndColumn()) );
78   }
79
80   public boolean contains(int line, int column) {
81     boolean afterStart = false;
82     boolean beforeEnd = false;
83
84     if ( getStartLine() < line ) {
85       afterStart = true;
86     }
87     else if ( getStartLine() == line && getStartColumn() <= column ) {
88       afterStart = true;
89     }
90
91     if ( getEndLine() > line ) {
92       beforeEnd = true;
93     }
94     else if ( getEndLine() == line && getEndColumn() >= column ) {
95       beforeEnd = true;
96     }
97
98     return ( afterStart && beforeEnd );
99   }
100
101   protected boolean startsBefore( Span span ) {
102     boolean result = false;
103     if ( getStartLine() < span.getStartLine() ) {
104       result = true;
105     }
106     else if ( getStartLine() == span.getStartLine()
107               && getStartColumn() <= span.getStartColumn() ) {
108       result = true;
109     }
110
111     return result;
112   }
113
114   protected boolean endsAfter( Span span ) {
115     boolean result = false;
116     if ( getEndLine() > span.getEndLine() ) {
117       result = true;
118     }
119     else if ( getEndLine() == span.getEndLine()
120               && getEndColumn() >= span.getEndColumn() ) {
121       result = true;
122     }
123
124     return result;
125   }
126
127   public void compose( Span span ) {
128     if ( span.startsBefore( this ) ) {
129       setStart( span.getStartLine(), span.getStartColumn() );
130     }
131     if ( span.endsAfter( this ) ) {
132       setEnd( span.getEndLine(), span.getEndColumn() );
133     }
134   }
135
136   public boolean equals(Object JavaDoc o) {
137     boolean result = false;
138     if ( o instanceof Span ) {
139       Span span = (Span)o;
140       result = ( span.getStartLine() == getStartLine()
141                  && span.getStartColumn() == getStartColumn()
142                  && span.getEndLine() == getEndLine()
143                  && span.getEndColumn() == getEndColumn() );
144     }
145     return result;
146   }
147
148   public String JavaDoc toString() {
149     return "[" + getStartLine() + "," + getStartColumn()
150       + ":" + getEndLine() + "," + getEndColumn() + "]";
151   }
152
153 }
154
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