SSTable.java 文件源码

public static Set<Component> discoverComponentsFor(Descriptor desc)
{
    Set<Component.Type> knownTypes = Sets.difference(Component.TYPES, Collections.singleton(Component.Type.CUSTOM));
    Set<Component> components = Sets.newHashSetWithExpectedSize(knownTypes.size());
    for (Component.Type componentType : knownTypes)
    {
        if (componentType == Component.Type.DIGEST)
        {
            if (desc.digestComponent != null && new File(desc.filenameFor(desc.digestComponent)).exists())
                components.add(desc.digestComponent);
        }
        else
        {
            Component component = new Component(componentType);
            if (new File(desc.filenameFor(component)).exists())
                components.add(component);
        }
    }
    return components;
}