public void doTag()

in jelly-tags/util/src/main/java/org/apache/commons/jelly/tags/util/PropertiesTag.java [47:101]
49 lines of code
12 McCabe index (conditional complexity)

    public void doTag(final XMLOutput output) throws JellyTagException {
        if (file == null && uri == null) {
            throw new JellyTagException("This tag must define a 'file' or 'uri' attribute");
        }
        InputStream is = null;
        if (file != null) {
            File f = new File(file);
            if (!f.exists()) {
                throw new JellyTagException("file: " + file + " does not exist!");
            }

            try {
                is = new FileInputStream(f);
            } catch (FileNotFoundException e) {
                throw new JellyTagException(e);
            }
        }
        else {
            is = context.getResourceAsStream(uri);
            if (is == null) {
                throw new JellyTagException( "Could not find: " + uri );
            }
        }
        Properties props = new Properties();

        try {
            props.load(is);
        } catch (IOException e) {
            throw new JellyTagException("properties tag could not load from file",e);
        }
        finally {
            if (is != null) {
                try {
                    is.close();
                } catch (IOException ioe) {
                    ;
                }   
            }
        }           
        
        if (var != null) {
            context.setVariable(var, props);
        }
        else {
            Enumeration propsEnum = props.propertyNames();
            while (propsEnum.hasMoreElements()) {
                String key = (String) propsEnum.nextElement();
                String value = props.getProperty(key);

                // @todo we should parse the value in case its an Expression
                context.setVariable(key, value);
            }
        }

    }