TypeUseImpl.java 文件源码

public JExpression createConstant(Outline outline, XmlString lexical) {
    if(isCollection())  return null;

    if(adapter==null)     return coreType.createConstant(outline, lexical);

    // [RESULT] new Adapter().unmarshal(CONSTANT);
    JExpression cons = coreType.createConstant(outline, lexical);
    Class<? extends XmlAdapter> atype = adapter.getAdapterIfKnown();

    // try to run the adapter now rather than later.
    if(cons instanceof JStringLiteral && atype!=null) {
        JStringLiteral scons = (JStringLiteral) cons;
        XmlAdapter a = ClassFactory.create(atype);
        try {
            Object value = a.unmarshal(scons.str);
            if(value instanceof String) {
                return JExpr.lit((String)value);
            }
        } catch (Exception e) {
            // assume that we can't eagerly bind this
        }
    }

    return JExpr._new(adapter.getAdapterClass(outline)).invoke("unmarshal").arg(cons);
}