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1
19 package gcc.generator;
20
21 import gcc.generator.CodeWriter;
22 import gcc.generator.GenOptions;
23
24 import java.io.File;
25 import java.io.FileOutputStream;
26 import java.io.OutputStream;
27 import java.io.OutputStreamWriter;
28 import java.io.PrintWriter;
29
30 public class JavaWriter extends CodeWriter
31 {
32 protected GenOptions _genOptions;
33
34 protected PrintWriter _pw;
35
36 protected boolean _needIndent = true;
37 protected int _indentPos = 0;
38 protected String _indentStr = "";
39 protected String _spaces = " ";
40
41 public JavaWriter( GenOptions genOptions, String fileName, String ext )
42 {
43 super( genOptions, fileName, ext );
44 }
45
46 protected File getFile()
47 throws GenException
48 {
49 File file = null;
50 GenOptions go = getGenOptions();
51 String fileName = getFileName() + getFileExt();
52
53 try
54 {
55 file = new File( go.getGenDir(), fileName );
56
57 if (file.exists() && !go.isOverwrite ())
58 {
59 fileName = fileName + ".new";
60
61 file = new File( go.getGenDir(), fileName );
62 }
63 }
64 catch( Exception ex )
65 {
66 throw new GenException( "Error: Unable to open output dir: " + go.getGenDir() + ", file: " + fileName, ex );
67 }
68
69 return file;
70 }
71
72 public void openFile()
73 throws GenException
74 {
75 OutputStream os = null;
76
77 if (_file != null)
78 {
79 return;
81 }
82
83 _file = getFile();
84
85 if (_file == null)
86 {
87 throw new GenException( "Error: Unable to obtain output file." );
88 }
89
90 if (getGenOptions().isVerbose())
91 {
92 System.out.println( "Generating: " + _file );
93 }
94
95 os = null;
96
97 _file.getParentFile().mkdirs();
100
102 if (_file.exists() && !_file.canWrite())
103 {
104 throw new GenException( "Error: Unable to write to file: " + _file );
105 }
106
107 if (!_file.exists() && !_file.getParentFile().canWrite())
108 {
109 throw new GenException( "Error: Unable to write to directory: " + _file.getParentFile() );
110 }
111
112 try
113 {
114 os = new FileOutputStream( _file );
115 }
116 catch( Exception ex )
117 {
118 throw new GenException( "Error: Unable to init output file: " + _file, ex );
119 }
120
121 try
122 {
123 _pw = new PrintWriter(new OutputStreamWriter(os));
124 }
125 catch( Exception ex )
126 {
127 throw new GenException( "Error: Unable to init output file: " + _file, ex );
128 }
129 }
130
131 public void closeFile()
132 throws GenException
133 {
134 if (_pw != null)
135 {
136 try
137 {
138 _pw.flush();
139 _pw.close();
140 }
141 catch( Exception e )
142 {
143 throw new GenException( "Error: Unable to close output file: " + _file, e );
144 }
145
146 _pw = null;
147 }
148
149 _file = null;
150 }
151
152 public void indent()
153 {
154 _indentPos += 4;
155 if (_indentPos > _spaces.length())
156 {
157 _indentPos -= 4;
158 }
159 _indentStr = _spaces.substring( 0, _indentPos );
160 }
161
162 public void outdent()
163 {
164 _indentPos -= 4;
165 if (_indentPos < 0)
166 {
167 _indentPos = 0;
168 }
169 _indentStr = _spaces.substring( 0, _indentPos );
170 }
171
172 public void begin()
173 {
174 _needIndent = true;
175 println( "{" );
176 indent();
177 }
178
179 public void end()
180 {
181 outdent();
182 _needIndent = true;
183 println( "}" );
184 }
185
186 public void newln()
187 {
188 println( "" );
189 _needIndent = true;
190 }
191
192 public void comment( String msg )
193 {
194 println( "// " + msg );
195 }
196
197 public void println( String line )
198 {
199 if (_needIndent)
200 {
201 _needIndent = false;
202 _pw.print( _indentStr );
203 }
204
205 _pw.println( line );
206 _needIndent = true;
207 }
208
209 public void print( String line )
210 {
211 if (_needIndent)
212 {
213 _needIndent = false;
214 _pw.print( _indentStr );
215 }
216
217 _pw.print( line );
218 }
219 }
220 |
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