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package io.dico.dicore.command;
import java.util.List;
public abstract class InheritingContextFilter implements IContextFilter {
private static final String[] emptyStringArray = new String[0];
private static String[] addParent(String[] path, String parent) {
String[] out = new String[path.length + 1];
System.arraycopy(path, 0, out, 1, path.length);
out[0] = parent;
return out;
}
protected abstract boolean isInherited(IContextFilter filter);
@Override
public void filterContext(ExecutionContext context) throws CommandException {
ICommandAddress address = context.getAddress();
String[] traversedPath = emptyStringArray;
do {
traversedPath = addParent(traversedPath, address.getMainKey());
address = address.getParent();
if (address != null && address.hasCommand()) {
boolean doBreak = true;
Command command = address.getCommand();
List<IContextFilter> contextFilterList = command.getContextFilters();
for (IContextFilter filter : contextFilterList) {
if (isInherited(filter)) {
if (filter == this) {
// do the same for next parent
// this method is necessary to keep traversedPath information
doBreak = false;
} else {
filter.filterSubContext(context, traversedPath);
}
}
}
if (doBreak) {
break;
}
}
} while (address != null);
}
static InheritingContextFilter inheritingPriority(Priority priority) {
return new InheritingContextFilter() {
@Override
protected boolean isInherited(IContextFilter filter) {
return filter.getPriority() == priority;
}
@Override
public Priority getPriority() {
return priority;
}
};
}
}
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