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1
87 package org.codehaus.loom.launcher;
88
89 import java.io.File  ;
90 import java.net.URL ;
91 import java.util.ArrayList ;
92 import java.util.StringTokenizer ;
93
94
99 public class LauncherUtils
100 {
101
107 static URL [] generateClassPath( final File homeDir,
108 final String libDirectory )
109 throws Exception
110 {
111 final ArrayList urls = new ArrayList ();
112
113 final File dir = findLibDir( homeDir, libDirectory );
114 final File [] files = dir.listFiles();
115 for( int i = 0; i < files.length; i++ )
116 {
117 final File file = files[ i ];
118 if( file.getName().endsWith( ".jar" ) )
119 {
120 urls.add( file.toURL() );
121 }
122 }
123
124 return (URL [])urls.toArray( new URL [ urls.size() ] );
125 }
126
127
133 static File findLibDir( final File homeDir,
134 final String libDirectory )
135 throws Exception
136 {
137 final String engineLibDir = libDirectory.replace( '/',
138 File.separatorChar );
139 final File dir = new File ( homeDir, engineLibDir ).getCanonicalFile();
140 if( !dir.exists() )
141 {
142 throw new Exception (
143 "Unable to locate library directory at " + engineLibDir );
144 }
145 return dir;
146 }
147
148
155 static File findLoomHome( final String systemProperty,
156 final String loaderJar )
157 throws Exception
158 {
159 String loomHome = System.getProperty( systemProperty, null );
160 if( null == loomHome )
161 {
162 final File loaderDir =
163 findLoaderDir( systemProperty, loaderJar );
164 return loaderDir.getCanonicalFile().getParentFile();
165 }
166 else
167 {
168 return new File ( loomHome ).getCanonicalFile();
169 }
170 }
171
172
175 private static final File findLoaderDir( final String systemProperty,
176 final String loaderJar )
177 throws Exception
178 {
179 final String classpath = System.getProperty( "java.class.path" );
180 final String pathSeparator = System.getProperty( "path.separator" );
181 final StringTokenizer tokenizer = new StringTokenizer ( classpath,
182 pathSeparator );
183
184 while( tokenizer.hasMoreTokens() )
185 {
186 final String element = tokenizer.nextToken();
187
188 if( element.endsWith( loaderJar ) )
189 {
190 File file = ( new File ( element ) ).getCanonicalFile();
191 file = file.getParentFile();
192 return file;
193 }
194 }
195
196 throw new Exception ( "Unable to locate " +
197 loaderJar +
198 " in classpath. User must specify " +
199 systemProperty + " system property." );
200 }
201 }
202 |
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