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AnnotatedAbstractModule.java
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AnnotatedAbstractModule.java
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package cz.cvut.spipes.modules;
import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;
import org.apache.jena.rdf.model.AnonId;
import org.apache.jena.rdf.model.Literal;
import org.apache.jena.rdf.model.RDFNode;
import org.apache.jena.rdf.model.RDFVisitor;
import org.apache.jena.rdf.model.Resource;
import org.apache.jena.rdf.model.ResourceFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public abstract class AnnotatedAbstractModule extends AbstractModule {
private static final Logger LOG = LoggerFactory.getLogger(AnnotatedAbstractModule.class);
@Override
public void loadConfiguration() {
final Map<String,Field> vars = new HashMap<>();
for(final Field f: this.getClass().getDeclaredFields()) {
final Parameter p = f.getAnnotation(Parameter.class);
if ( p == null ) {
continue;
} else if (vars.containsKey(p.name())) {
throw new RuntimeException(String.format("Two parameters are named the same %s, except prefix", p.name()));
} else {
vars.put(p.name(), f);
}
LOG.trace("Processing parameter {} ", f.getName());
RDFNode node = this.getEffectiveValue(ResourceFactory.createProperty(p.urlPrefix()+p.name()));
if ( node != null ) {
final Object result = node.visitWith(new RDFVisitor() {
@Override
public Object visitBlank(Resource r, AnonId id) {
return null;
}
@Override
public Object visitURI(Resource r, String uri) { return r; }
@Override
public Object visitLiteral(Literal l) { return l.getValue(); }
});
try {
f.setAccessible(true);
f.set(this, result);
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
}
}
}