import com.sun.tools.internal.xjc.reader.xmlschema.Messages; //导入依赖的package包/类
/**
     * Fully-generate the source code into the given model.
     *
     * @return
     *      null if there was any errors. Otherwise it returns a valid
     *      {@link Outline} object, which captures how the model objects
     *      are mapped to the generated source code.
     *      <p>
     *      Add-ons can use those information to further augment the generated
     *      source code.
     */
    public Outline generateCode(Options opt,ErrorReceiver receiver) {
        ErrorReceiverFilter ehf = new ErrorReceiverFilter(receiver);

        // run extensions // moved to BGMBuilder._build() - issue with hyperjaxb3
//        for( Plugin ma : opt.activePlugins )
//            ma.postProcessModel(this,ehf);

        Outline o = BeanGenerator.generate(this, ehf);

        try {// run extensions
            for( Plugin ma : opt.activePlugins )
                ma.run(o,opt,ehf);
        } catch (SAXException e) {
            // fatal error. error should have been reported
            return null;
        }

        // check for unused plug-in customizations.
        // these can be only checked after the plug-ins run, so it's here.
        // the JAXB bindings are checked by XMLSchema's builder.
        Set<CCustomizations> check = new HashSet<CCustomizations>();
        for( CCustomizations c=customizations; c!=null; c=c.next ) {
            if(!check.add(c)) {
                throw new AssertionError(); // detect a loop
            }
            for (CPluginCustomization p : c) {
                if(!p.isAcknowledged()) {
                    ehf.error(
                        p.locator,
                        Messages.format(
                            Messages.ERR_UNACKNOWLEDGED_CUSTOMIZATION,
                            p.element.getNodeName()
                        ));
                    ehf.error(
                        c.getOwner().getLocator(),
                        Messages.format(
                            Messages.ERR_UNACKNOWLEDGED_CUSTOMIZATION_LOCATION));
                }
            }
        }

        if(ehf.hadError())
            o = null;
        return o;
    }