import com.sun.tools.internal.jxc.model.nav.ApNavigator; //导入依赖的package包/类
public J2SJAXBModel bind(
    Collection<Reference> rootClasses,
    Map<QName,Reference> additionalElementDecls,
    String defaultNamespaceRemap,
    ProcessingEnvironment env) {

    ModelBuilder<TypeMirror, TypeElement, VariableElement, ExecutableElement> builder =
            new ModelBuilder<TypeMirror, TypeElement, VariableElement, ExecutableElement>(
            InlineAnnotationReaderImpl.theInstance,
            new ApNavigator(env),
            Collections.<TypeElement, TypeElement>emptyMap(),
            defaultNamespaceRemap );

    builder.setErrorHandler(new ErrorHandlerImpl(env.getMessager()));

    for ( Reference ref : rootClasses ) {
        TypeMirror t = ref.type;

        XmlJavaTypeAdapter xjta = ref.annotations.getAnnotation(XmlJavaTypeAdapter.class);
        XmlList xl = ref.annotations.getAnnotation(XmlList.class);

        builder.getTypeInfo(new Ref<TypeMirror, TypeElement>(builder, t, xjta, xl));
    }

    TypeInfoSet<TypeMirror, TypeElement, VariableElement, ExecutableElement> r = builder.link();
    if(r==null)     return null;

    if(additionalElementDecls==null)
        additionalElementDecls = Collections.emptyMap();
    else {
        // fool proof check
        for (Map.Entry<QName, ? extends Reference> e : additionalElementDecls.entrySet()) {
            if(e.getKey()==null)
                throw new IllegalArgumentException("nulls in additionalElementDecls");
        }
    }
    return new JAXBModelImpl(r, builder.reader, rootClasses, new HashMap<QName, Reference>(additionalElementDecls));
}