jaxp-api-1.3/src/main/java/javax/xml/datatype/FactoryFinder.java [280:395]:
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            is = SecuritySupport.getResourceAsStream(cl, serviceId);
        }

        if (is == null) {
            // No provider found
            return null;
        }

        if (debug) debugPrintln("found jar resource=" + serviceId +
               " using ClassLoader: " + cl);

        BufferedReader rd;
        try {
            rd = new BufferedReader(new InputStreamReader(is, "UTF-8"), DEFAULT_LINE_LENGTH);
        } catch (java.io.UnsupportedEncodingException e) {
            rd = new BufferedReader(new InputStreamReader(is), DEFAULT_LINE_LENGTH);
        }
        
        String factoryClassName = null;
        try {
            // XXX Does not handle all possible input as specified by the
            // Jar Service Provider specification
            factoryClassName = rd.readLine();
        } 
        catch (IOException x) {
            // No provider found
            return null;
        }
        finally {
            try { 
                // try to close the reader. 
                rd.close(); 
            } 
            // Ignore the exception. 
            catch (IOException exc) {}
        }

        if (factoryClassName != null &&
            ! "".equals(factoryClassName)) {
            if (debug) debugPrintln("found in resource, value="
                   + factoryClassName);

            return newInstance(factoryClassName, cl);
        }

        // No provider found
        return null;
    }
    
	/**
	 * <p>Configuration Error.</p>
	 */
    static class ConfigurationError extends Error {
        
        private static final long serialVersionUID = -3644413026244211347L;
    	
    	/**
    	 * <p>Exception that caused the error.</p>
    	 */
        private Exception exception;

        /**
         * <p>Construct a new instance with the specified detail string and
         * exception.</p>
         * 
         * @param msg Detail message for this error.
         * @param x Exception that caused the error.
         */
        ConfigurationError(String msg, Exception x) {
            super(msg);
            this.exception = x;
        }

		/**
		 * <p>Get the Exception that caused the error.</p>
		 * 
		 * @return Exception that caused the error.
		 */
        Exception getException() {
            return exception;
        }
    }



    /**
     * Returns the location where the given Class is loaded from.
     * 
     * @param clazz Class to find load location.
     * 
     * @return Location where class would be loaded from.
     */
    private static String which(Class clazz) {
        try {
            String classnameAsResource = clazz.getName().replace('.', '/') + ".class";
    
            ClassLoader loader = clazz.getClassLoader();
            
            URL it;
    
            if (loader != null) {
            	it = loader.getResource(classnameAsResource);
            } else {
            	it = ClassLoader.getSystemResource(classnameAsResource);
            } 
    
            if (it != null) {
            	return it.toString();
            } 
        } catch (Throwable t) {
            // work defensively.
            if (debug) {
            	t.printStackTrace();
            } 
        }
        return "unknown location";
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jaxp-api-1.4/src/main/java/javax/xml/datatype/FactoryFinder.java [297:412]:
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            is = SecuritySupport.getResourceAsStream(cl, serviceId);
        }

        if (is == null) {
            // No provider found
            return null;
        }

        if (debug) debugPrintln("found jar resource=" + serviceId +
               " using ClassLoader: " + cl);

        BufferedReader rd;
        try {
            rd = new BufferedReader(new InputStreamReader(is, "UTF-8"), DEFAULT_LINE_LENGTH);
        } catch (java.io.UnsupportedEncodingException e) {
            rd = new BufferedReader(new InputStreamReader(is), DEFAULT_LINE_LENGTH);
        }
        
        String factoryClassName = null;
        try {
            // XXX Does not handle all possible input as specified by the
            // Jar Service Provider specification
            factoryClassName = rd.readLine();
        } 
        catch (IOException x) {
            // No provider found
            return null;
        }
        finally {
            try { 
                // try to close the reader. 
                rd.close(); 
            } 
            // Ignore the exception. 
            catch (IOException exc) {}
        }

        if (factoryClassName != null &&
            ! "".equals(factoryClassName)) {
            if (debug) debugPrintln("found in resource, value="
                   + factoryClassName);

            return newInstance(factoryClassName, cl);
        }

        // No provider found
        return null;
    }
    
	/**
	 * <p>Configuration Error.</p>
	 */
    static class ConfigurationError extends Error {
        
        private static final long serialVersionUID = -3644413026244211347L;
    	
    	/**
    	 * <p>Exception that caused the error.</p>
    	 */
        private Exception exception;

        /**
         * <p>Construct a new instance with the specified detail string and
         * exception.</p>
         * 
         * @param msg Detail message for this error.
         * @param x Exception that caused the error.
         */
        ConfigurationError(String msg, Exception x) {
            super(msg);
            this.exception = x;
        }

		/**
		 * <p>Get the Exception that caused the error.</p>
		 * 
		 * @return Exception that caused the error.
		 */
        Exception getException() {
            return exception;
        }
    }



    /**
     * Returns the location where the given Class is loaded from.
     * 
     * @param clazz Class to find load location.
     * 
     * @return Location where class would be loaded from.
     */
    private static String which(Class clazz) {
        try {
            String classnameAsResource = clazz.getName().replace('.', '/') + ".class";
    
            ClassLoader loader = clazz.getClassLoader();
            
            URL it;
    
            if (loader != null) {
            	it = loader.getResource(classnameAsResource);
            } else {
            	it = ClassLoader.getSystemResource(classnameAsResource);
            } 
    
            if (it != null) {
            	return it.toString();
            } 
        } catch (Throwable t) {
            // work defensively.
            if (debug) {
            	t.printStackTrace();
            } 
        }
        return "unknown location";
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