Examples with Meta com.vaadin.flow.component.page.Meta used on opensource projects

Example 1 with Meta

use of com.vaadin.flow.component.page.Meta in project flow by vaadin.

the class BootstrapUtils method getMetaTargets.

/**
 * Returns the map which contains name and content of the customized meta
 * tag for the target route chain that was navigated to, specified with
 * {@link Meta} on the {@link Route} class or the {@link ParentLayout} of
 * the route.
 *
 * @param context
 *            the bootstrap context
 * @return the map contains name and content value string for the customized
 *         meta tag
 */
static Map<String, String> getMetaTargets(BootstrapHandler.BootstrapContext context) {
    List<Meta> metaAnnotations = context.getPageConfigurationAnnotations(Meta.class);
    boolean illegalValue = false;
    Map<String, String> map = new HashMap<>();
    for (Meta meta : metaAnnotations) {
        if (!meta.name().isEmpty() && !meta.content().isEmpty()) {
            map.put(meta.name(), meta.content());
        } else {
            illegalValue = true;
            break;
        }
    }
    if (illegalValue) {
        throw new IllegalStateException("Meta tags added via Meta annotation contain null value on name or content attribute.");
    }
    return map;
}