import org.apache.wicket.ajax.json.JSONException; //导入依赖的package包/类
public String getUrlFromJson(final String jsonString) throws JSONException {
    // The handle API returns a JSON structure with a number of handle
    // record fields. We are only interested in the value at
    // values[x].data.value where values[x].type == 'URL'

    final JSONObject jsonResponse = new JSONObject(jsonString);
    final JSONArray valuesArray = jsonResponse.getJSONArray("values");
    for (int i = 0; i < valuesArray.length(); i++) {
        final JSONObject object = valuesArray.getJSONObject(i);
        final String type = object.getString("type");
        if ("URL".equals(type) && object.has("data")) {
            final JSONObject data = object.getJSONObject("data");
            if (data.has("value")) {
                // the field we were looking for
                return data.getString("value");
            }
        }
    }
    // no URL field??
    logger.error("Handle API response did not incude a URL field");
    return null;
}
 

import org.apache.wicket.ajax.json.JSONException; //导入依赖的package包/类
private IModel<String> createJsonModel(final IModel<SolrDocument> model, final IModel<String> endpointModel) {
    // Prepare a JSON object that holds the CQL endpoint and the document self link
    return new AbstractReadOnlyModel<String>() {
        @Override
        public String getObject() {
            final String endPoint = endpointModel.getObject();
            final Object selfLink = model.getObject().getFirstValue(FacetConstants.FIELD_SELF_LINK);
            try {
                final JSONObject json = new JSONObject();
                json.put(endPoint, new JSONArray(new Object[]{selfLink}));
                return json.toString(2);
            } catch (JSONException ex) {
                logger.warn("Could not create JSON for aggregation context with endpoint '{}' and docId '{}'", endPoint, selfLink, ex);
                return null;
            }
        }

        @Override
        public void detach() {
            super.detach();
            endpointModel.detach();
        }

    };
}
 

import org.apache.wicket.ajax.json.JSONException; //导入依赖的package包/类
@Override
protected void postprocessConfiguration(JSONObject attributesJson, Component component) throws JSONException {
	super.postprocessConfiguration(attributesJson, component);
	if (choice) {
		/* RadioGroups *may* not have an ID in the resulting HTML, so we must attach the handler to each
		 * input with the correct name in the same form.
		 * See also: getUniqueEventName(), getCallbackScript(), updateAjaxAttributes()
		 */
		attributesJson.put(AjaxAttributeName.MARKUP_ID.jsonName(), component.findParent(Form.class).getMarkupId());
		attributesJson.put(AjaxAttributeName.CHILD_SELECTOR.jsonName(), "input[name=\"" + ((FormComponent<?>)component).getInputName() + "\"]");
	}
}
 

import org.apache.wicket.ajax.json.JSONException; //导入依赖的package包/类
/**
 * creates the initializer script
 *
 * @param data configuration data
 * @return new initializer script.
 */
protected CharSequence createInitializerScript(final Map<String, Object> data) {
    try {
        return "window.wicketClientSideLogging(jQuery, Wicket, window.amplify, " + JSONObject.valueToString(data) + ");";
    } catch (JSONException e) {
        throw new WicketRuntimeException(e);
    }
}