src/main/java/net/matrix/app/repository/ResourceSelectionSet.java
public Set<String> catalogNames() {
		Set<String> catalogs = new HashSet<>();
		for (ResourceSelection selection : selections) {
			catalogs.add(selection.getCatalog());
		}
		return catalogs;
	}
public Set<String> catalogNames() {
		Set<String> catalogs = new HashSet<>();
		for (ResourceSelection selection : selections) {
			catalogs.add(selection.getCatalog());
		}
		return catalogs;
	}
汇总得到所有资源仓库选择的类别信息。

@return 类别名称集合