Class ObjectModelAdaptor

output/java8/1.4.13/ObjectModelAdaptor.java:40–155

public class ObjectModelAdaptor implements ModelAdaptor {
    protected static final Member INVALID_MEMBER;
    static {
        Member invalidMember;
        try {
            invalidMember = ObjectModelAdaptor.class.getDeclaredField("INVALID_MEMBER");
        }
        catch (NoSuchFieldException ex) {
            invalidMember = null;
        }
        catch (SecurityException ex) {
            invalidMember = null;
        }
        INVALID_MEMBER = invalidMember;
    }

    protected static final Map<Class<?>, Map<String, Member>> membersCache = new HashMap<Class<?>, Map<String, Member>>();
    @Override
    public synchronized Object getProperty(Interpreter interp, ST self, Object o, Object property, String propertyName) throws STNoSuchPropertyException {
        if ( o==null ) {
            throw new NullPointerException("o");
        }
        Class<?> c = o.getClass();
        if ( property==null ) {
            return throwNoSuchProperty(c, propertyName, null);
        }
        Member member = findMember(c, propertyName);
        if ( member!=null ) {
            try {
                if ( member instanceof Method ) {
                    return ((Method)member).invoke(o);
                }
                else if ( member instanceof Field ) {
                         return ((Field)member).get(o);
                }
            }
            catch (Exception e) {
                throwNoSuchProperty(c, propertyName, e);
            }
        }
        return throwNoSuchProperty(c, propertyName, null);
    }

    protected static Member findMember(Class<?> clazz, String memberName) {
        if ( clazz==null ) {
            throw new NullPointerException("clazz");
        }
        if ( memberName==null ) {
            throw new NullPointerException("memberName");
        }
        synchronized (membersCache) {
            Map<String, Member> members = membersCache.get(clazz);
            Member member;
            if ( members!=null ) {
                member = members.get(memberName);
                if ( member!=null ) {
                    return member!= INVALID_MEMBER ? member : null;
                }