/**
* Returns the Capabilities of this filter, customized based on the data. I.e., if removes all
* class capabilities, in case there's not class attribute present or removes the NO_CLASS
* capability, in case that there's a class present.
*
* @param data the data to use for customization
* @return the capabilities of this object, based on the data
* @see #getCapabilities()
*/
public Capabilities getCapabilities(Instances data) {
Capabilities result;
Capabilities classes;
Iterator iter;
Capability cap;
result = getCapabilities();
// no class? -> remove all class capabilites apart from NO_CLASS
if (data.classIndex() == -1) {
classes = result.getClassCapabilities();
iter = classes.capabilities();
while (iter.hasNext()) {
cap = (Capability) iter.next();
if (cap != Capability.NO_CLASS) {
result.disable(cap);
result.disableDependency(cap);
}
}
}
// class? -> remove NO_CLASS
else {
result.disable(Capability.NO_CLASS);
result.disableDependency(Capability.NO_CLASS);
}
return result;
}
/**
* retrieves the data from the given Capabilities object
*
* @param c the capabilities object to initialize with
*/
public void assign(Capabilities c) {
for (Capability cap : Capability.values()) {
// capability
if (c.handles(cap)) enable(cap);
else disable(cap);
// dependency
if (c.hasDependency(cap)) enableDependency(cap);
else disableDependency(cap);
}
setMinimumNumberInstances(c.getMinimumNumberInstances());
}
/**
* disables the dependency of the given capability Disabling NOMINAL_ATTRIBUTES also disables
* BINARY_ATTRIBUTES, UNARY_ATTRIBUTES and EMPTY_NOMINAL_ATTRIBUTES. Disabling BINARY_ATTRIBUTES
* also disables UNARY_ATTRIBUTES and EMPTY_NOMINAL_ATTRIBUTES. Disabling UNARY_ATTRIBUTES also
* disables EMPTY_NOMINAL_ATTRIBUTES. The same hierarchy applies to the class capabilities.
*
* @param c the capability to disable the dependency flag for
*/
public void disableDependency(Capability c) {
// attributes
if (c == Capability.NOMINAL_ATTRIBUTES) {
disableDependency(Capability.BINARY_ATTRIBUTES);
} else if (c == Capability.BINARY_ATTRIBUTES) {
disableDependency(Capability.UNARY_ATTRIBUTES);
} else if (c == Capability.UNARY_ATTRIBUTES) {
disableDependency(Capability.EMPTY_NOMINAL_ATTRIBUTES);
}
// class
else if (c == Capability.NOMINAL_CLASS) {
disableDependency(Capability.BINARY_CLASS);
} else if (c == Capability.BINARY_CLASS) {
disableDependency(Capability.UNARY_CLASS);
} else if (c == Capability.UNARY_CLASS) {
disableDependency(Capability.EMPTY_NOMINAL_CLASS);
}
m_Dependencies.remove(c);
}
/**
* disables all attribute type dependencies
*
* @see #enableAllAttributeDependencies()
* @see #getAttributeCapabilities()
*/
public void disableAllAttributeDependencies() {
for (Capability cap : Capability.values()) {
if (cap.isAttribute()) disableDependency(cap);
}
}
/**
* disables all class type dependencies
*
* @see #enableAllClassDependencies()
* @see #getClassCapabilities()
*/
public void disableAllClassDependencies() {
for (Capability cap : Capability.values()) {
if (cap.isClass()) disableDependency(cap);
}
}