/*
* Copyright 2012 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Eclipse Public License version 1.0, available at
* http://www.eclipse.org/legal/epl-v10.html
*/
package org.jboss.aesh.cl;
import org.jboss.aesh.cl.internal.OptionInt;
import org.jboss.aesh.cl.internal.ParameterInt;
/**
* Generates a {@link CommandLineParser} based on annotations defined in
* the specified class.
*
* @author <a href="mailto:stale.pedersen@jboss.org">Ståle W. Pedersen</a>
*/
public class ParserGenerator {
public static CommandLineParser generateParser(Class<?>... clazzes) {
ParserBuilder builder = new ParserBuilder();
for(Class clazz : clazzes) {
Parameter param = (Parameter) clazz.getAnnotation(Parameter.class);
if(param == null)
throw new RuntimeException("Can only create parser from class thats annotated with Parameter");
builder.addParameter(generateParameter(param));
}
return builder.generateParser();
}
private static ParameterInt generateParameter(Parameter param) {
if(param.name() == null || param.name().length() < 1)
throw new RuntimeException("The parameter name must be defined");
if(param.options() != null) {
OptionInt[] options = new OptionInt[param.options().length];
for(int i=0; i < param.options().length; i++) {
Option o = param.options()[i];
options[i] = new OptionInt(
o.name(), o.longName(), o.description(),
o.hasValue(), o.argument(), o.required(), o.valueSeparator(),
o.isProperty(), o.hasMultipleValues(), o.type());
}
return new ParameterInt(param.name(), param.usage(),
param.argumentType(), options);
}
else
return new ParameterInt(param.name(), param.usage(),
param.argumentType(), new OptionInt[0]);
}
}