LangFtlUtil.java 文件源码

/**
 * Supposed to convert to simple sequence.
 * <p>
 * WARN: Bypasses auto-escaping for complex maps, caller must decide how to handle.
 * (e.g. the object wrapper used to rewrap the result).
 * <p>
 * DEV NOTE: I stopped writing/testing this when found out most of the problems w.r.t. collections are not
 * the FTL types this time but the way they're used in Ofbiz templates.
 * FTL's CollectionModel (subclass of TemplateCollectionModel) is supposed to cover everything and
 * won't suffer from the same problems maps have.
 */
@SuppressWarnings("unchecked")
@Deprecated
private static TemplateSequenceModel toSimpleSequence(TemplateModel object, ObjectWrapper objectWrapper) throws TemplateModelException {
    if (object instanceof TemplateSequenceModel) {
        return (TemplateSequenceModel) object;
    }
    else if (object instanceof WrapperTemplateModel) {
        WrapperTemplateModel wrapperModel = (WrapperTemplateModel) object;
        // WARN: bypasses auto-escaping
        Object wrappedObject = wrapperModel.getWrappedObject();
        if (wrappedObject instanceof List) {
            return DefaultListAdapter.adapt((List<Object>) wrappedObject, (RichObjectWrapper) objectWrapper);
        }
        else if (wrappedObject instanceof Object[]) {
            return DefaultArrayAdapter.adapt((Object[]) wrappedObject, (ObjectWrapperAndUnwrapper) objectWrapper);
        }
        else if (wrappedObject instanceof Set) {
            throw new UnsupportedOperationException("Not yet implemented");
        }
        else if (wrappedObject instanceof Collection) {
            throw new UnsupportedOperationException("Not yet implemented");
        }
        else if (wrappedObject instanceof Iterable) {
            throw new UnsupportedOperationException("Not yet implemented");
        }
        else {
            throw new TemplateModelException("Cannot convert bean-wrapped object of type " + (object != null ? object.getClass() : "null") + " to simple sequence"); 
        }
    }
    else if (object instanceof TemplateCollectionModel) {
        TemplateCollectionModel collModel = (TemplateCollectionModel) object;
        SimpleSequence res = new SimpleSequence(objectWrapper);
        TemplateModelIterator it = collModel.iterator();
        while(it.hasNext()) {
            res.add(it.next());
        }
        return res;
    }
    else {
        throw new TemplateModelException("Cannot convert object of type " + (object != null ? object.getClass() : "null") + " to simple sequence"); 
    }
}