Example usage for org.apache.commons.lang.mutable MutableDouble MutableDouble

Introduction

In this page you can find the example usage for org.apache.commons.lang.mutable MutableDouble MutableDouble.

Prototype

public MutableDouble() 

Source Link

Document

Constructs a new MutableDouble with the default value of zero.

Usage

From source file:com.google.gerrit.server.ReviewerRecommender.java

private Map<Account.Id, MutableDouble> baseRankingForCandidateList(List<Account.Id> candidates,
        ProjectControl projectControl, double baseWeight) throws OrmException {
    // Get each reviewer's activity based on number of applied labels
    // (weighted 10d), number of comments (weighted 0.5d) and number of owned
    // changes (weighted 1d).
    Map<Account.Id, MutableDouble> reviewers = new LinkedHashMap<>();
    if (candidates.size() == 0) {
        return reviewers;
    }//from   w ww  .  ja  v a  2 s  . co m
    List<Predicate<ChangeData>> predicates = new ArrayList<>();
    for (Account.Id id : candidates) {
        try {
            Predicate<ChangeData> projectQuery = changeQueryBuilder
                    .project(projectControl.getProject().getName());

            // Get all labels for this project and create a compound OR query to
            // fetch all changes where users have applied one of these labels
            List<LabelType> labelTypes = projectControl.getLabelTypes().getLabelTypes();
            List<Predicate<ChangeData>> labelPredicates = new ArrayList<>(labelTypes.size());
            for (LabelType type : labelTypes) {
                labelPredicates.add(changeQueryBuilder.label(type.getName() + ",user=" + id));
            }
            Predicate<ChangeData> reviewerQuery = Predicate.and(projectQuery, Predicate.or(labelPredicates));

            Predicate<ChangeData> ownerQuery = Predicate.and(projectQuery,
                    changeQueryBuilder.owner(id.toString()));
            Predicate<ChangeData> commentedByQuery = Predicate.and(projectQuery,
                    changeQueryBuilder.commentby(id.toString()));

            predicates.add(reviewerQuery);
            predicates.add(ownerQuery);
            predicates.add(commentedByQuery);
            reviewers.put(id, new MutableDouble());
        } catch (QueryParseException e) {
            // Unhandled: If an exception is thrown, we won't increase the
            // candidates's score
            log.error("Exception while suggesting reviewers", e);
        }
    }

    List<List<ChangeData>> result = internalChangeQuery.setLimit(25).setRequestedFields(ImmutableSet.of())
            .query(predicates);

    Iterator<List<ChangeData>> queryResultIterator = result.iterator();
    Iterator<Account.Id> reviewersIterator = reviewers.keySet().iterator();

    int i = 0;
    Account.Id currentId = null;
    while (queryResultIterator.hasNext()) {
        List<ChangeData> currentResult = queryResultIterator.next();
        if (i % WEIGHTS.length == 0) {
            currentId = reviewersIterator.next();
        }

        reviewers.get(currentId).add(WEIGHTS[i % WEIGHTS.length] * baseWeight * currentResult.size());
        i++;
    }
    return reviewers;
}

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