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package com.sos.scheduler.engine.kernel.command;
import com.google.common.collect.ImmutableMap;
import com.sos.scheduler.engine.kernel.SchedulerException;
import org.w3c.dom.Element;
import static java.util.Arrays.asList;
class DispatchingXmlCommandParser implements CommandXmlParser {
private final ImmutableMap<String,SingleCommandXmlParser> singleCommandParsers;
private final ImmutableMap<String,PrefixCommandXmlParser> prefixCommandParsers;
DispatchingXmlCommandParser(Iterable<CommandXmlParser> parsers) {
ImmutableMap.Builder<String,SingleCommandXmlParser> builder = new ImmutableMap.Builder<String,SingleCommandXmlParser>();
ImmutableMap.Builder<String,PrefixCommandXmlParser> prefixBuilder = new ImmutableMap.Builder<String,PrefixCommandXmlParser>();
for (CommandXmlParser p: parsers) {
if (p instanceof SingleCommandXmlParser) {
SingleCommandXmlParser pp = (SingleCommandXmlParser)p;
builder.put(pp.getCommandName(), pp);
} else
if (p instanceof PrefixCommandXmlParser) {
PrefixCommandXmlParser pp = (PrefixCommandXmlParser)p;
prefixBuilder.put(pp.getCommandPrefix(), pp);
} else
throw new SchedulerException("Unknown CommandParser " + p);
}
singleCommandParsers = builder.build();
prefixCommandParsers = prefixBuilder.build();
}
DispatchingXmlCommandParser(CommandXmlParser... parsers) {
this(asList(parsers));
}
@Override public final Command parse(Element element) {
return commandParser(element.getNodeName()).parse(element);
}
private CommandXmlParser commandParser(String name) {
CommandXmlParser result = null;
int t = name.indexOf(PrefixCommandXmlParser.prefixTerminator);
if (t >= 0) result = prefixCommandParsers.get(name.substring(0, t + 1));
if (result == null) result = singleCommandParsers.get(name);
if (result == null) throw new UnknownCommandException("<" + name + ">");
return result;
}
}