package de.saumya.mojo.gems.spec.yaml;
import java.io.IOException;
import org.codehaus.plexus.component.annotations.Component;
import org.yaml.snakeyaml.Dumper;
import org.yaml.snakeyaml.DumperOptions;
import org.yaml.snakeyaml.Loader;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.Constructor;
import de.saumya.mojo.gems.spec.GemSpecification;
import de.saumya.mojo.gems.spec.GemSpecificationIO;
/**
* This is here just be able to quickly switch between snakeYaml and YamlBeans,
* since they are both good, with their own quirks. SnakeYaml won ;) So we can
* clear up this later.
*
* @author cstamas
*/
@SuppressWarnings("deprecation")
@Component(role = GemSpecificationIO.class, hint = "yaml")
public class YamlGemSpecificationIO implements GemSpecificationIO {
protected Yaml _yaml;
public GemSpecification read(final String string) throws IOException {
return readGemSpecfromYaml(string);
}
public String write(final GemSpecification gemspec) throws IOException {
return writeGemSpectoYaml(gemspec);
}
// ==
protected Yaml getYaml() {
if (this._yaml == null) {
final Constructor constructor = new MappingConstructor();
final Loader loader = new Loader(constructor);
final DumperOptions dumperOptions = new DumperOptions();
dumperOptions.setExplicitStart(true);
dumperOptions.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
dumperOptions.setDefaultScalarStyle(DumperOptions.ScalarStyle.PLAIN);
final MappingRepresenter representer = new MappingRepresenter();
final Dumper dumper = new Dumper(representer, dumperOptions);
this._yaml = new Yaml(loader, dumper);
}
return this._yaml;
}
protected GemSpecification readGemSpecfromYaml(final String gemspecString)
throws IOException {
// snake has some problems i could not overcome
// return readGemSpecfromYamlWithSnakeYaml( gemspec );
// yamlbeans makes better yaml at 1st glance
return readGemSpecfromYamlWithSnakeYaml(gemspecString);
}
protected String writeGemSpectoYaml(final GemSpecification gemspec)
throws IOException {
// snake has some problems i could not overcome
// return writeGemSpectoYamlWithSnakeYaml( gemspec );
// yamlbeans makes better yaml at 1st glance
return writeGemSpectoYamlWithSnakeYaml(gemspec);
}
// == SnakeYaml
protected GemSpecification readGemSpecfromYamlWithSnakeYaml(
final String gemspecString) throws IOException {
return (GemSpecification) getYaml().load(gemspecString);
}
protected String writeGemSpectoYamlWithSnakeYaml(
final GemSpecification gemspec) throws IOException {
return getYaml().dump(gemspec);
}
}