Java 类freemarker.template.DefaultListAdapter 实例源码

public static Iterable freemarkerWrapperToIterable(Object object)
{
    if (object == null)
        throw new WindupException("Illegal null passed to freemarkerWrapperToIterable method!");

    if (object instanceof DefaultListAdapter)
    {
        return (Iterable)((DefaultListAdapter) object).getWrappedObject();
    } else if (object instanceof DefaultIterableAdapter)
    {
        return (Iterable)((DefaultIterableAdapter) object).getWrappedObject();
    } else
    {
        throw new WindupException("Unrecognized type: " + object.getClass());
    }
}

@Override
public void execute(Environment env, Map params, TemplateModel[] loopVars, TemplateDirectiveBody body)
    throws TemplateException, IOException {
  SimpleScalar name = (SimpleScalar) params.get("name");
  if (params.containsKey("value")) {
    Object valueObject = params.get("value");
    Object value;
    if (valueObject == null) {
      value = null;
    } else if (valueObject instanceof WrapperTemplateModel) {
      value = ((WrapperTemplateModel) valueObject).getWrappedObject();
    } else if (valueObject instanceof TemplateScalarModel) {
      value = ((TemplateScalarModel) valueObject).getAsString();
    } else if (valueObject instanceof TemplateNumberModel) {
      value = ((TemplateNumberModel) valueObject).getAsNumber();
    } else if (valueObject instanceof TemplateDateModel) {
      value = ((TemplateDateModel) valueObject).getAsDate();
    } else if (valueObject instanceof TemplateBooleanModel) {
      value = ((TemplateBooleanModel) valueObject).getAsBoolean();
    } else {
      throw new UnsupportedOperationException(
          String.format("Type %s is not supported yet in this context.", valueObject.getClass().getSimpleName()));
    }

    TemplateModel generatedParamsObject = env.getGlobalVariables().get(FreeMarkerSqlSource.GENERATED_PARAMS_KEY);
    List generatedParams;
    if (generatedParamsObject instanceof DefaultListAdapter) {
      generatedParams = (List) ((DefaultListAdapter) generatedParamsObject).getWrappedObject();
    } else {
      generatedParams = ((GeneratedParamsTemplateModel) generatedParamsObject).getGeneratedParams();
    }
    String generatedParamName = "_p" + generatedParams.size();
    env.getOut().write(String.format("#{%s}", generatedParamName));
    generatedParams.add(value);
  } else {
    env.getOut().write(String.format("#{%s}", name));
  }
}

@Override
public Object exec(@SuppressWarnings("rawtypes") List arguments) throws TemplateModelException
{
    ExecutionStatistics.get().begin(NAME);
    if (arguments.size() != 1)
        throw new TemplateModelException("Error, method expects one argument (an Iterable)");

    DefaultListAdapter listModelArg = (DefaultListAdapter) arguments.get(0);
    List<ApplicationReportModel> list = (List<ApplicationReportModel>) listModelArg.getWrappedObject();
    Collections.sort(list, new CreateApplicationListReportRuleProvider.AppRootFileNameComparator());

    ExecutionStatistics.get().end(NAME);
    return list;
}

@SuppressWarnings("unchecked")
private Iterable<Object> getIterable(Object arg) throws TemplateModelException
{
    if (arg instanceof BeanModel)
    {
        BeanModel beanModel = (BeanModel) arg;
        return (Iterable<Object>) beanModel.getWrappedObject();
    }
    else if (arg instanceof SimpleSequence)
    {
        SimpleSequence simpleSequence = (SimpleSequence) arg;
        return (Iterable<Object>) simpleSequence.toList();
    }
    else if (arg instanceof DefaultIterableAdapter)
    {
        DefaultIterableAdapter adapter = (DefaultIterableAdapter) arg;
        return (Iterable<Object>) adapter.getAdaptedObject(Iterable.class);
    }
    else if (arg instanceof DefaultListAdapter)
    {
        DefaultListAdapter defaultListAdapter = (DefaultListAdapter) arg;
        return (Iterable<Object>) defaultListAdapter.getWrappedObject();
    }
    else
    {
        throw new WindupException("Unrecognized type passed to: " + getMethodName() + ": "
                    + arg.getClass().getCanonicalName());
    }
}

/**
 * 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"); 
    }
}