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ResultSetMappingProcessor.java
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ResultSetMappingProcessor.java
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package cz.cvut.kbss.jopa.query.mapper;
import cz.cvut.kbss.jopa.model.annotations.ConstructorResult;
import cz.cvut.kbss.jopa.model.annotations.SparqlResultSetMapping;
import cz.cvut.kbss.jopa.model.annotations.VariableResult;
import cz.cvut.kbss.jopa.query.ResultSetMappingManager;
import java.util.Objects;
/**
* Builds mappers for {@link SparqlResultSetMapping} instances discovered on classpath.
*/
public class ResultSetMappingProcessor {
private final ResultSetMappingManager manager = new ResultSetMappingManager();
/**
* Builds result set mapper for the specified mapping.
*
* @param mapping Mapping configuration
*/
public void buildMapper(SparqlResultSetMapping mapping) {
Objects.requireNonNull(mapping);
final ResultRowMapper rowMapper = new ResultRowMapper(mapping.name());
buildVariableMappers(mapping, rowMapper);
buildConstructorMappers(mapping, rowMapper);
manager.addMapper(rowMapper.getName(), rowMapper);
}
private void buildVariableMappers(SparqlResultSetMapping mapping, ResultRowMapper parent) {
for (VariableResult vr : mapping.variables()) {
parent.addMapper(new VariableResultMapper(vr));
}
}
private void buildConstructorMappers(SparqlResultSetMapping mapping, ResultRowMapper parent) {
for (ConstructorResult cr : mapping.classes()) {
final ConstructorResultMapper mapper = new ConstructorResultMapper(cr.targetClass());
for (VariableResult vr : cr.variables()) {
mapper.addParameterMapper(new VariableResultMapper(vr));
}
parent.addMapper(mapper);
}
}
public ResultSetMappingManager getManager() {
return manager;
}
}