public void doTag()

in jelly-tags/antlr/src/main/java/org/apache/commons/jelly/tags/antlr/AntlrTag.java [53:118]
53 lines of code
8 McCabe index (conditional complexity)

    public void doTag(final XMLOutput output) throws MissingAttributeException, JellyTagException
    {
        if ( this.outputDir == null )
        {
            throw new MissingAttributeException( "outputDir" );
        }

        invokeBody( output );

        Iterator grammarIter = this.grammars.iterator();
        String eachGrammar = null;

        String sourceDir = (String) getContext().getVariable( "maven.antlr.src.dir" );
        File grammar = null;

        while ( grammarIter.hasNext() )
        {
            eachGrammar = ((String) grammarIter.next()).trim();

            grammar = new File( sourceDir,
                                eachGrammar );

            File generated = getGeneratedFile( grammar.getPath() );

            if ( generated.exists() )
            {
                if ( generated.lastModified() > grammar.lastModified() )
                {
                    // it's more recent, skip.
                    return;
                }
            }

            if ( ! generated.getParentFile().exists() )
            {
                generated.getParentFile().mkdirs();
            }

            String[] args = new String[]
                {
                    "-o",
                    generated.getParentFile().getPath(),
                    grammar.getPath(),
                };

            SecurityManager oldSm = System.getSecurityManager();

            System.setSecurityManager( NoExitSecurityManager.INSTANCE );

            try
            {
                Tool.main( args );
            }
            catch (SecurityException e)
            {
                if ( ! e.getMessage().equals( "exitVM-0" ) )
                {
                    throw new JellyTagException( e );
                }
            }
            finally
            {
                System.setSecurityManager( oldSm );
            }
        }
    }