freemarker.template.TemplateHashModelEx#get ( )源码实例Demo

public static String modelExToString(TemplateHashModelEx thme) {
    StringBuilder sb = new StringBuilder();
    TemplateModelIterator i;
    try {
        i = thme.keys().iterator();
        while (i.hasNext()) {
            TemplateModel k = i.next();
            TemplateModel v = thme.get(k.toString());
            sb.append(" - ").append(k).append("=").append(v).append('\n');
        }
    } catch (TemplateModelException ex) {
        throw new RuntimeException(ex);
    }
    return sb.toString();
}
 

@Override
public Object exec(@SuppressWarnings("rawtypes") List args) throws TemplateModelException {
    if (args == null || args.size() < 1 || args.size() > 2 ) {
        throw new TemplateModelException("Invalid number of arguments (expected: 1-2)");
    }

    ObjectWrapper objectWrapper = CommonFtlUtil.getCurrentEnvironment().getObjectWrapper();

    // support empty list (ignore, treat as empty hash)
    TemplateModel argsObj = (TemplateModel) args.get(0);
    if (argsObj instanceof TemplateSequenceModel) {
        TemplateSequenceModel argsSeq = (TemplateSequenceModel) argsObj;
        if (argsSeq.size() == 0) {
            argsObj = TemplateHashModelEx.NOTHING;
        } else {
            throw new TemplateModelException("Invalid argument type (sequence) - expected hash");
        }
    }

    TemplateHashModelEx argsMap = (TemplateHashModelEx) argsObj;

    // caller-supplied excludes
    TemplateModel excludesModel = (args.size() >=2) ? (TemplateModel) args.get(1) : null;
    Set<String> excludes;
    if (excludesModel != null) {
        excludes = LangFtlUtil.getAsStringSet(excludesModel);
    } else {
        excludes = new HashSet<>();
    }

    SimpleHash res = null;

    final Boolean useExclude = Boolean.FALSE;

    // put attribs from explicit attribs map first, if any
    TemplateModel attribsModel = argsMap.get("attribs");
    if (attribsModel != null && OfbizFtlObjectType.isObjectType(OfbizFtlObjectType.MAP, attribsModel)) {
        if (OfbizFtlObjectType.isObjectType(OfbizFtlObjectType.COMPLEXMAP, attribsModel)) {
            attribsModel = LangFtlUtil.toSimpleMap(attribsModel, false, objectWrapper);
        }
        res = LangFtlUtil.copyMapToSimple((TemplateHashModel) attribsModel, excludes, useExclude, objectWrapper);
    }

    // to get inline attribs, add list of all arg names to excludes as well as the lists themselves
    TemplateModel allArgNamesModel = argsMap.get("allArgNames");
    if (allArgNamesModel != null) {
        excludes.addAll(LangFtlUtil.getAsStringSet(allArgNamesModel));
    }
    excludes.add("allArgNames");
    excludes.add("localArgNames");
    excludes.add("attribs"); // 2020-02-12: in most cases this was automatically added by makeArgMaps from default args list, but custom usages need this now

    // add the inline attribs over the attribs map (if any)
    if (res == null) {
        res = LangFtlUtil.copyMapToSimple(argsMap, excludes, useExclude, objectWrapper);
    } else {
        LangFtlUtil.putAll(res, argsMap, excludes, useExclude, objectWrapper);
    }

    return res;
}