PropertyInfoImpl.java 文件源码

/**
 * Checks if the given adapter is applicable to the declared property type.
 */
private boolean isApplicable(XmlJavaTypeAdapter jta, T declaredType ) {
    if(jta==null)   return false;

    T type = reader().getClassValue(jta,"type");
    if(nav().isSameType(declaredType, type))
        return true;    // for types explicitly marked in XmlJavaTypeAdapter.type()

    T ad = reader().getClassValue(jta,"value");
    T ba = nav().getBaseClass(ad, nav().asDecl(XmlAdapter.class));
    if(!nav().isParameterizedType(ba))
        return true;   // can't check type applicability. assume Object, which means applicable to any.
    T inMemType = nav().getTypeArgument(ba, 1);

    return nav().isSubClassOf(declaredType,inMemType);
}