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package tsukuba_bunko.util.locator; |
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import java.io.File; |
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import java.io.UnsupportedEncodingException; |
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import java.net.URL; |
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import java.net.URLDecoder; |
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import tsukuba_bunko.util.ResourceLocator; |
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import tsukuba_bunko.util.ResourceDetectionException; |
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public class ResourceLocatorImpl extends ResourceLocator { |
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public File findLocation( String resourceName, ClassLoader classLoader ) |
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throws ResourceDetectionException |
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{ |
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URL resourceURL = classLoader.getResource( resourceName ); |
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if( resourceURL == null ) { |
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throw new ResourceDetectionException( "fail to find resource from classpath" ); |
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} |
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String protocol = resourceURL.getProtocol(); |
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if( "file".equals(protocol) ) { |
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String path = resourceURL.getFile(); |
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try { |
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path = URLDecoder.decode( path, "UTF-8" ); |
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} |
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catch( UnsupportedEncodingException uee ) { |
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throw new ResourceDetectionException( "system is not supoort UTF-8. This Java VM may be broken.", uee ); |
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} |
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int index = path.indexOf( resourceName ); |
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if( index > 0 ) { |
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resourceName = resourceName.substring( 0, index ); |
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} |
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return new File( resourceName ); |
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} |
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else if( "jar".equals(protocol) ) { |
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String jarUri = resourceURL.toString(); |
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int delemiterIndex = jarUri.indexOf( "!/" ); |
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if( delemiterIndex == -1 ) { |
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throw new ResourceDetectionException( "invalid JAR URL." ); |
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} |
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else { |
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String resourceUri = jarUri.substring( 4, delemiterIndex ); |
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if( !resourceUri.startsWith("file:") ) { |
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throw new ResourceDetectionException( "supported file protocol only" ); |
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} |
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else { |
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try { |
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return new File( URLDecoder.decode( class="keyword">new URL(resourceUri).getFile(), "UTF-8") ); |
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} |
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catch( Exception e ) { |
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throw new ResourceDetectionException( "invalid URL.", e ); |
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} |
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} |
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} |
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} |
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else { |
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throw new ResourceDetectionException( "supported jar or file protocol only" ); |
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} |
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} |
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} |