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Use streams

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This commit is contained in:
René Pfeuffer
2018-06-06 17:32:15 +02:00
parent a8c61a9bfd
commit 62711700f9
2 changed files with 41 additions and 21 deletions
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33
scm-webapp/src/main/java/sonia/scm/api/v2/FieldContainerResponseFilter.java
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@@ -1,7 +1,6 @@
package sonia.scm.api.v2;
import com.fasterxml.jackson.databind.JsonNode;
import com.google.common.collect.Lists;
import javax.annotation.Priority;
import javax.ws.rs.Priorities;
@@ -12,6 +11,11 @@ import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.Provider;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import static java.util.Arrays.stream;
import static java.util.Collections.emptyList;
import static java.util.Optional.ofNullable;
/**
* <p>Post processor for rest requests filtering json responses when a {@value PARAMETER_FIELDS} query
@@ -51,27 +55,16 @@ public class FieldContainerResponseFilter implements ContainerResponseFilter {
}
private List<String> extractFieldsFrom(ContainerRequestContext requestContext) {
List<String> fields = Lists.newArrayList();
List<String> fieldParameters = getFieldParameterFrom(requestContext);
if (fieldParameters != null && !fieldParameters.isEmpty()) {
for (String fieldParameter : fieldParameters) {
appendFieldsFromParameter(fields, fieldParameter);
}
}
return fields;
return getFieldParameterFrom(requestContext)
.orElse(emptyList())
.stream()
.flatMap(p -> stream(p.split(FIELD_SEPARATOR)))
.collect(Collectors.toList());
}
private List<String> getFieldParameterFrom(ContainerRequestContext requestContext) {
private Optional<List<String>> getFieldParameterFrom(ContainerRequestContext requestContext) {
MultivaluedMap<String, String> queryParameters = requestContext.getUriInfo().getQueryParameters();
return queryParameters.get(PARAMETER_FIELDS);
List<String> fieldParameters = queryParameters.get(PARAMETER_FIELDS);
return ofNullable(fieldParameters);
}
private void appendFieldsFromParameter(List<String> fields, String fieldParameter) {
for (String field : fieldParameter.split(FIELD_SEPARATOR)) {
fields.add(field);
}
}
}