--- /dev/null
+package jalview.datamodel.features;
+
+import jalview.datamodel.ContiguousI;
+import jalview.datamodel.SequenceFeature;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * A data store for a set of sequence features that supports efficient lookup of
+ * features overlapping a given range. Intended for (but not limited to) storage
+ * of features for one sequence and feature type.
+ *
+ * @author gmcarstairs
+ *
+ */
+public class FeatureStore
+{
+ /**
+ * a class providing criteria for performing a binary search of a list
+ */
+ abstract static class SearchCriterion
+ {
+ /**
+ * Answers true if the entry passes the search criterion test
+ *
+ * @param entry
+ * @return
+ */
+ abstract boolean compare(SequenceFeature entry);
+
+ /**
+ * serves a search condition for finding the first feature whose start
+ * position follows a given target location
+ *
+ * @param target
+ * @return
+ */
+ static SearchCriterion byStart(final long target)
+ {
+ return new SearchCriterion() {
+
+ @Override
+ boolean compare(SequenceFeature entry)
+ {
+ return entry.getBegin() >= target;
+ }
+ };
+ }
+
+ /**
+ * serves a search condition for finding the first feature whose end
+ * position is at or follows a given target location
+ *
+ * @param target
+ * @return
+ */
+ static SearchCriterion byEnd(final long target)
+ {
+ return new SearchCriterion()
+ {
+
+ @Override
+ boolean compare(SequenceFeature entry)
+ {
+ return entry.getEnd() >= target;
+ }
+ };
+ }
+
+ /**
+ * serves a search condition for finding the first feature which follows the
+ * given range as determined by a supplied comparator
+ *
+ * @param target
+ * @return
+ */
+ static SearchCriterion byFeature(final ContiguousI to,
+ final Comparator<ContiguousI> rc)
+ {
+ return new SearchCriterion()
+ {
+
+ @Override
+ boolean compare(SequenceFeature entry)
+ {
+ return rc.compare(entry, to) >= 0;
+ }
+ };
+ }
+ }
+
+ /*
+ * Non-positional features have no (zero) start/end position.
+ * Kept as a separate list in case this criterion changes in future.
+ */
+ List<SequenceFeature> nonPositionalFeatures;
+
+ /*
+ * An ordered list of features, with the promise that no feature in the list
+ * properly contains any other. This constraint allows bounded linear search
+ * of the list for features overlapping a region.
+ * Contact features are not included in this list.
+ */
+ List<SequenceFeature> nonNestedFeatures;
+
+ /*
+ * contact features ordered by first contact position
+ */
+ List<SequenceFeature> contactFeatureStarts;
+
+ /*
+ * contact features ordered by second contact position
+ */
+ List<SequenceFeature> contactFeatureEnds;
+
+ /*
+ * Nested Containment List is used to hold any features that are nested
+ * within (properly contained by) any other feature. This is a recursive tree
+ * which supports depth-first scan for features overlapping a range.
+ * It is used here as a 'catch-all' fallback for features that cannot be put
+ * into a simple ordered list without invalidating the search methods.
+ */
+ NCList<SequenceFeature> nestedFeatures;
+
+ /*
+ * Feature groups represented in stored positional features
+ * (possibly including null)
+ */
+ Set<String> positionalFeatureGroups;
+
+ /*
+ * Feature groups represented in stored non-positional features
+ * (possibly including null)
+ */
+ Set<String> nonPositionalFeatureGroups;
+
+ /*
+ * the total length of all positional features; contact features count 1 to
+ * the total and 1 to size(), consistent with an average 'feature length' of 1
+ */
+ int totalExtent;
+
+ float positionalMinScore;
+
+ float positionalMaxScore;
+
+ float nonPositionalMinScore;
+
+ float nonPositionalMaxScore;
+
+ /**
+ * Constructor
+ */
+ public FeatureStore()
+ {
+ nonNestedFeatures = new ArrayList<SequenceFeature>();
+ positionalFeatureGroups = new HashSet<String>();
+ nonPositionalFeatureGroups = new HashSet<String>();
+ positionalMinScore = Float.NaN;
+ positionalMaxScore = Float.NaN;
+ nonPositionalMinScore = Float.NaN;
+ nonPositionalMaxScore = Float.NaN;
+
+ // we only construct nonPositionalFeatures, contactFeatures
+ // or the NCList if we need to
+ }
+
+ /**
+ * Adds one sequence feature to the store, and returns true, unless the
+ * feature is already contained in the store, in which case this method
+ * returns false. Containment is determined by SequenceFeature.equals()
+ * comparison.
+ *
+ * @param feature
+ */
+ public boolean addFeature(SequenceFeature feature)
+ {
+ if (contains(feature))
+ {
+ return false;
+ }
+
+ /*
+ * keep a record of feature groups
+ */
+ if (!feature.isNonPositional())
+ {
+ positionalFeatureGroups.add(feature.getFeatureGroup());
+ }
+
+ boolean added = false;
+
+ if (feature.isContactFeature())
+ {
+ added = addContactFeature(feature);
+ }
+ else if (feature.isNonPositional())
+ {
+ added = addNonPositionalFeature(feature);
+ }
+ else
+ {
+ added = addNonNestedFeature(feature);
+ if (!added)
+ {
+ /*
+ * detected a nested feature - put it in the NCList structure
+ */
+ added = addNestedFeature(feature);
+ }
+ }
+
+ if (added)
+ {
+ /*
+ * record the total extent of positional features, to make
+ * getTotalFeatureLength possible; we count the length of a
+ * contact feature as 1
+ */
+ totalExtent += getFeatureLength(feature);
+
+ /*
+ * record the minimum and maximum score for positional
+ * and non-positional features
+ */
+ float score = feature.getScore();
+ if (!Float.isNaN(score))
+ {
+ if (feature.isNonPositional())
+ {
+ nonPositionalMinScore = min(nonPositionalMinScore, score);
+ nonPositionalMaxScore = max(nonPositionalMaxScore, score);
+ }
+ else
+ {
+ positionalMinScore = min(positionalMinScore, score);
+ positionalMaxScore = max(positionalMaxScore, score);
+ }
+ }
+ }
+
+ return added;
+ }
+
+ /**
+ * Answers true if this store contains the given feature (testing by
+ * SequenceFeature.equals), else false
+ *
+ * @param feature
+ * @return
+ */
+ public boolean contains(SequenceFeature feature)
+ {
+ if (feature.isNonPositional())
+ {
+ return nonPositionalFeatures == null ? false : nonPositionalFeatures
+ .contains(feature);
+ }
+
+ if (feature.isContactFeature())
+ {
+ return contactFeatureStarts == null ? false : listContains(
+ contactFeatureStarts, feature);
+ }
+
+ if (listContains(nonNestedFeatures, feature))
+ {
+ return true;
+ }
+
+ return nestedFeatures == null ? false : nestedFeatures
+ .contains(feature);
+ }
+
+ /**
+ * Answers the 'length' of the feature, counting 0 for non-positional features
+ * and 1 for contact features
+ *
+ * @param feature
+ * @return
+ */
+ protected static int getFeatureLength(SequenceFeature feature)
+ {
+ if (feature.isNonPositional())
+ {
+ return 0;
+ }
+ if (feature.isContactFeature())
+ {
+ return 1;
+ }
+ return 1 + feature.getEnd() - feature.getBegin();
+ }
+
+ /**
+ * Adds the feature to the list of non-positional features (with lazy
+ * instantiation of the list if it is null), and returns true. The feature
+ * group is added to the set of distinct feature groups for non-positional
+ * features. This method allows duplicate features, so test before calling to
+ * prevent this.
+ *
+ * @param feature
+ */
+ protected boolean addNonPositionalFeature(SequenceFeature feature)
+ {
+ if (nonPositionalFeatures == null)
+ {
+ nonPositionalFeatures = new ArrayList<SequenceFeature>();
+ }
+
+ nonPositionalFeatures.add(feature);
+
+ nonPositionalFeatureGroups.add(feature.getFeatureGroup());
+
+ return true;
+ }
+
+ /**
+ * Adds one feature to the NCList that can manage nested features (creating
+ * the NCList if necessary), and returns true. If the feature is already
+ * stored in the NCList (by equality test), then it is not added, and this
+ * method returns false.
+ */
+ protected synchronized boolean addNestedFeature(SequenceFeature feature)
+ {
+ if (nestedFeatures == null)
+ {
+ nestedFeatures = new NCList<>(feature);
+ return true;
+ }
+ return nestedFeatures.add(feature, false);
+ }
+
+ /**
+ * Add a feature to the list of non-nested features, maintaining the ordering
+ * of the list. A check is made for whether the feature is nested in (properly
+ * contained by) an existing feature. If there is no nesting, the feature is
+ * added to the list and the method returns true. If nesting is found, the
+ * feature is not added and the method returns false.
+ *
+ * @param feature
+ * @return
+ */
+ protected boolean addNonNestedFeature(SequenceFeature feature)
+ {
+ synchronized (nonNestedFeatures)
+ {
+ /*
+ * find the first stored feature which doesn't precede the new one
+ */
+ int insertPosition = binarySearch(nonNestedFeatures,
+ SearchCriterion.byFeature(feature, RangeComparator.BY_START_POSITION));
+
+ /*
+ * fail if we detect feature enclosure - of the new feature by
+ * the one preceding it, or of the next feature by the new one
+ */
+ if (insertPosition > 0)
+ {
+ if (encloses(nonNestedFeatures.get(insertPosition - 1), feature))
+ {
+ return false;
+ }
+ }
+ if (insertPosition < nonNestedFeatures.size())
+ {
+ if (encloses(feature, nonNestedFeatures.get(insertPosition)))
+ {
+ return false;
+ }
+ }
+
+ /*
+ * checks passed - add the feature
+ */
+ nonNestedFeatures.add(insertPosition, feature);
+
+ return true;
+ }
+ }
+
+ /**
+ * Answers true if range1 properly encloses range2, else false
+ *
+ * @param range1
+ * @param range2
+ * @return
+ */
+ protected boolean encloses(ContiguousI range1, ContiguousI range2)
+ {
+ int begin1 = range1.getBegin();
+ int begin2 = range2.getBegin();
+ int end1 = range1.getEnd();
+ int end2 = range2.getEnd();
+ if (begin1 == begin2 && end1 > end2)
+ {
+ return true;
+ }
+ if (begin1 < begin2 && end1 >= end2)
+ {
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * Add a contact feature to the lists that hold them ordered by start (first
+ * contact) and by end (second contact) position, ensuring the lists remain
+ * ordered, and returns true. This method allows duplicate features to be
+ * added, so test before calling to avoid this.
+ *
+ * @param feature
+ * @return
+ */
+ protected synchronized boolean addContactFeature(SequenceFeature feature)
+ {
+ if (contactFeatureStarts == null)
+ {
+ contactFeatureStarts = new ArrayList<SequenceFeature>();
+ }
+ if (contactFeatureEnds == null)
+ {
+ contactFeatureEnds = new ArrayList<SequenceFeature>();
+ }
+
+ /*
+ * binary search the sorted list to find the insertion point
+ */
+ int insertPosition = binarySearch(contactFeatureStarts,
+ SearchCriterion.byFeature(feature,
+ RangeComparator.BY_START_POSITION));
+ contactFeatureStarts.add(insertPosition, feature);
+ // and resort to mak siccar...just in case insertion point not quite right
+ Collections.sort(contactFeatureStarts, RangeComparator.BY_START_POSITION);
+
+ insertPosition = binarySearch(contactFeatureStarts,
+ SearchCriterion.byFeature(feature,
+ RangeComparator.BY_END_POSITION));
+ contactFeatureEnds.add(feature);
+ Collections.sort(contactFeatureEnds, RangeComparator.BY_END_POSITION);
+
+ return true;
+ }
+
+ /**
+ * Answers true if the list contains the feature, else false. This method is
+ * optimised for the condition that the list is sorted on feature start
+ * position ascending, and will give unreliable results if this does not hold.
+ *
+ * @param features
+ * @param feature
+ * @return
+ */
+ protected static boolean listContains(List<SequenceFeature> features,
+ SequenceFeature feature)
+ {
+ if (features == null || feature == null)
+ {
+ return false;
+ }
+
+ /*
+ * locate the first entry in the list which does not precede the feature
+ */
+ int pos = binarySearch(features,
+ SearchCriterion.byFeature(feature, RangeComparator.BY_START_POSITION));
+ int len = features.size();
+ while (pos < len)
+ {
+ SequenceFeature sf = features.get(pos);
+ if (sf.getBegin() > feature.getBegin())
+ {
+ return false; // no match found
+ }
+ if (sf.equals(feature))
+ {
+ return true;
+ }
+ pos++;
+ }
+ return false;
+ }
+
+ /**
+ * Returns a (possibly empty) list of features whose extent overlaps the given
+ * range. The returned list is not ordered. Contact features are included if
+ * either of the contact points lies within the range.
+ *
+ * @param start
+ * start position of overlap range (inclusive)
+ * @param end
+ * end position of overlap range (inclusive)
+ * @return
+ */
+ public List<SequenceFeature> findOverlappingFeatures(long start, long end)
+ {
+ List<SequenceFeature> result = new ArrayList<>();
+
+ findNonNestedFeatures(start, end, result);
+
+ findContactFeatures(start, end, result);
+
+ if (nestedFeatures != null)
+ {
+ result.addAll(nestedFeatures.findOverlaps(start, end));
+ }
+
+ return result;
+ }
+
+ /**
+ * Adds contact features to the result list where either the second or the
+ * first contact position lies within the target range
+ *
+ * @param from
+ * @param to
+ * @param result
+ */
+ protected void findContactFeatures(long from, long to,
+ List<SequenceFeature> result)
+ {
+ if (contactFeatureStarts != null)
+ {
+ findContactStartFeatures(from, to, result);
+ }
+ if (contactFeatureEnds != null)
+ {
+ findContactEndFeatures(from, to, result);
+ }
+ }
+
+ /**
+ * Adds to the result list any contact features whose end (second contact
+ * point), but not start (first contact point), lies in the query from-to
+ * range
+ *
+ * @param from
+ * @param to
+ * @param result
+ */
+ protected void findContactEndFeatures(long from, long to,
+ List<SequenceFeature> result)
+ {
+ /*
+ * find the first contact feature (if any) that does not lie
+ * entirely before the target range
+ */
+ int startPosition = binarySearch(contactFeatureEnds,
+ SearchCriterion.byEnd(from));
+ for (; startPosition < contactFeatureEnds.size(); startPosition++)
+ {
+ SequenceFeature sf = contactFeatureEnds.get(startPosition);
+ if (!sf.isContactFeature())
+ {
+ System.err.println("Error! non-contact feature type "
+ + sf.getType() + " in contact features list");
+ continue;
+ }
+
+ int begin = sf.getBegin();
+ if (begin >= from && begin <= to)
+ {
+ /*
+ * this feature's first contact position lies in the search range
+ * so we don't include it in results a second time
+ */
+ continue;
+ }
+
+ int end = sf.getEnd();
+ if (end >= from && end <= to)
+ {
+ result.add(sf);
+ }
+ if (end > to)
+ {
+ break;
+ }
+ }
+ }
+
+ /**
+ * Adds non-nested features to the result list that lie within the target
+ * range. Non-positional features (start=end=0), contact features and nested
+ * features are excluded.
+ *
+ * @param from
+ * @param to
+ * @param result
+ */
+ protected void findNonNestedFeatures(long from, long to,
+ List<SequenceFeature> result)
+ {
+ /*
+ * find the first feature whose end position is
+ * after the target range start
+ */
+ int startIndex = binarySearch(nonNestedFeatures,
+ SearchCriterion.byEnd(from));
+
+ final int startIndex1 = startIndex;
+ int i = startIndex1;
+ while (i < nonNestedFeatures.size())
+ {
+ SequenceFeature sf = nonNestedFeatures.get(i);
+ if (sf.getBegin() > to)
+ {
+ break;
+ }
+ if (sf.getBegin() <= to && sf.getEnd() >= from)
+ {
+ result.add(sf);
+ }
+ i++;
+ }
+ }
+
+ /**
+ * Adds contact features whose start position lies in the from-to range to the
+ * result list
+ *
+ * @param from
+ * @param to
+ * @param result
+ */
+ protected void findContactStartFeatures(long from, long to,
+ List<SequenceFeature> result)
+ {
+ int startPosition = binarySearch(contactFeatureStarts,
+ SearchCriterion.byStart(from));
+
+ for (; startPosition < contactFeatureStarts.size(); startPosition++)
+ {
+ SequenceFeature sf = contactFeatureStarts.get(startPosition);
+ if (!sf.isContactFeature())
+ {
+ System.err.println("Error! non-contact feature type "
+ + sf.getType() + " in contact features list");
+ continue;
+ }
+ int begin = sf.getBegin();
+ if (begin >= from && begin <= to)
+ {
+ result.add(sf);
+ }
+ }
+ }
+
+ /**
+ * Answers a list of all positional features stored, in no guaranteed order
+ *
+ * @return
+ */
+ public List<SequenceFeature> getPositionalFeatures()
+ {
+ /*
+ * add non-nested features (may be all features for many cases)
+ */
+ List<SequenceFeature> result = new ArrayList<>();
+ result.addAll(nonNestedFeatures);
+
+ /*
+ * add any contact features - from the list by start position
+ */
+ if (contactFeatureStarts != null)
+ {
+ result.addAll(contactFeatureStarts);
+ }
+
+ /*
+ * add any nested features
+ */
+ if (nestedFeatures != null)
+ {
+ result.addAll(nestedFeatures.getEntries());
+ }
+
+ return result;
+ }
+
+ /**
+ * Answers a list of all contact features. If there are none, returns an
+ * immutable empty list.
+ *
+ * @return
+ */
+ public List<SequenceFeature> getContactFeatures()
+ {
+ if (contactFeatureStarts == null)
+ {
+ return Collections.emptyList();
+ }
+ return new ArrayList<>(contactFeatureStarts);
+ }
+
+ /**
+ * Answers a list of all non-positional features. If there are none, returns
+ * an immutable empty list.
+ *
+ * @return
+ */
+ public List<SequenceFeature> getNonPositionalFeatures()
+ {
+ if (nonPositionalFeatures == null)
+ {
+ return Collections.emptyList();
+ }
+ return new ArrayList<>(nonPositionalFeatures);
+ }
+
+ /**
+ * Deletes the given feature from the store, returning true if it was found
+ * (and deleted), else false. This method makes no assumption that the feature
+ * is in the 'expected' place in the store, in case it has been modified since
+ * it was added.
+ *
+ * @param sf
+ */
+ public synchronized boolean delete(SequenceFeature sf)
+ {
+ /*
+ * try the non-nested positional features first
+ */
+ boolean removed = nonNestedFeatures.remove(sf);
+
+ /*
+ * if not found, try contact positions (and if found, delete
+ * from both lists of contact positions)
+ */
+ if (!removed && contactFeatureStarts != null)
+ {
+ removed = contactFeatureStarts.remove(sf);
+ if (removed)
+ {
+ contactFeatureEnds.remove(sf);
+ }
+ }
+
+ boolean removedNonPositional = false;
+
+ /*
+ * if not found, try non-positional features
+ */
+ if (!removed && nonPositionalFeatures != null)
+ {
+ removedNonPositional = nonPositionalFeatures.remove(sf);
+ removed = removedNonPositional;
+ }
+
+ /*
+ * if not found, try nested features
+ */
+ if (!removed && nestedFeatures != null)
+ {
+ removed = nestedFeatures.delete(sf);
+ }
+
+ if (removed)
+ {
+ rescanAfterDelete();
+ }
+
+ return removed;
+ }
+
+ /**
+ * Rescan all features to recompute any cached values after an entry has been
+ * deleted. This is expected to be an infrequent event, so performance here is
+ * not critical.
+ */
+ protected synchronized void rescanAfterDelete()
+ {
+ positionalFeatureGroups.clear();
+ nonPositionalFeatureGroups.clear();
+ totalExtent = 0;
+ positionalMinScore = Float.NaN;
+ positionalMaxScore = Float.NaN;
+ nonPositionalMinScore = Float.NaN;
+ nonPositionalMaxScore = Float.NaN;
+
+ /*
+ * scan non-positional features for groups and scores
+ */
+ for (SequenceFeature sf : getNonPositionalFeatures())
+ {
+ nonPositionalFeatureGroups.add(sf.getFeatureGroup());
+ float score = sf.getScore();
+ nonPositionalMinScore = min(nonPositionalMinScore, score);
+ nonPositionalMaxScore = max(nonPositionalMaxScore, score);
+ }
+
+ /*
+ * scan positional features for groups, scores and extents
+ */
+ for (SequenceFeature sf : getPositionalFeatures())
+ {
+ positionalFeatureGroups.add(sf.getFeatureGroup());
+ float score = sf.getScore();
+ positionalMinScore = min(positionalMinScore, score);
+ positionalMaxScore = max(positionalMaxScore, score);
+ totalExtent += getFeatureLength(sf);
+ }
+ }
+
+ /**
+ * A helper method to return the minimum of two floats, where a non-NaN value
+ * is treated as 'less than' a NaN value (unlike Math.min which does the
+ * opposite)
+ *
+ * @param f1
+ * @param f2
+ */
+ protected static float min(float f1, float f2)
+ {
+ if (Float.isNaN(f1))
+ {
+ return Float.isNaN(f2) ? f1 : f2;
+ }
+ else
+ {
+ return Float.isNaN(f2) ? f1 : Math.min(f1, f2);
+ }
+ }
+
+ /**
+ * A helper method to return the maximum of two floats, where a non-NaN value
+ * is treated as 'greater than' a NaN value (unlike Math.max which does the
+ * opposite)
+ *
+ * @param f1
+ * @param f2
+ */
+ protected static float max(float f1, float f2)
+ {
+ if (Float.isNaN(f1))
+ {
+ return Float.isNaN(f2) ? f1 : f2;
+ }
+ else
+ {
+ return Float.isNaN(f2) ? f1 : Math.max(f1, f2);
+ }
+ }
+
+ /**
+ * Answers true if this store has no features, else false
+ *
+ * @return
+ */
+ public boolean isEmpty()
+ {
+ boolean hasFeatures = !nonNestedFeatures.isEmpty()
+ || (contactFeatureStarts != null && !contactFeatureStarts
+ .isEmpty())
+ || (nonPositionalFeatures != null && !nonPositionalFeatures
+ .isEmpty())
+ || (nestedFeatures != null && nestedFeatures.size() > 0);
+
+ return !hasFeatures;
+ }
+
+ /**
+ * Answers the set of distinct feature groups stored, possibly including null,
+ * as an unmodifiable view of the set. The parameter determines whether the
+ * groups for positional or for non-positional features are returned.
+ *
+ * @param positionalFeatures
+ * @return
+ */
+ public Set<String> getFeatureGroups(boolean positionalFeatures)
+ {
+ if (positionalFeatures)
+ {
+ return Collections.unmodifiableSet(positionalFeatureGroups);
+ }
+ else
+ {
+ return nonPositionalFeatureGroups == null ? Collections
+ .<String> emptySet() : Collections
+ .unmodifiableSet(nonPositionalFeatureGroups);
+ }
+ }
+
+ /**
+ * Performs a binary search of the (sorted) list to find the index of the
+ * first entry which returns true for the given comparator function. Returns
+ * the length of the list if there is no such entry.
+ *
+ * @param features
+ * @param sc
+ * @return
+ */
+ protected static int binarySearch(List<SequenceFeature> features,
+ SearchCriterion sc)
+ {
+ int start = 0;
+ int end = features.size() - 1;
+ int matched = features.size();
+
+ while (start <= end)
+ {
+ int mid = (start + end) / 2;
+ SequenceFeature entry = features.get(mid);
+ boolean compare = sc.compare(entry);
+ if (compare)
+ {
+ matched = mid;
+ end = mid - 1;
+ }
+ else
+ {
+ start = mid + 1;
+ }
+ }
+
+ return matched;
+ }
+
+ /**
+ * Answers the number of positional (or non-positional) features stored.
+ * Contact features count as 1.
+ *
+ * @param positional
+ * @return
+ */
+ public int getFeatureCount(boolean positional)
+ {
+ if (!positional)
+ {
+ return nonPositionalFeatures == null ? 0 : nonPositionalFeatures
+ .size();
+ }
+
+ int size = nonNestedFeatures.size();
+
+ if (contactFeatureStarts != null)
+ {
+ // note a contact feature (start/end) counts as one
+ size += contactFeatureStarts.size();
+ }
+
+ if (nestedFeatures != null)
+ {
+ size += nestedFeatures.size();
+ }
+
+ return size;
+ }
+
+ /**
+ * Answers the total length of positional features (or zero if there are
+ * none). Contact features contribute a value of 1 to the total.
+ *
+ * @return
+ */
+ public int getTotalFeatureLength()
+ {
+ return totalExtent;
+ }
+
+ /**
+ * Answers the minimum score held for positional or non-positional features.
+ * This may be Float.NaN if there are no features, are none has a non-NaN
+ * score.
+ *
+ * @param positional
+ * @return
+ */
+ public float getMinimumScore(boolean positional)
+ {
+ return positional ? positionalMinScore : nonPositionalMinScore;
+ }
+
+ /**
+ * Answers the maximum score held for positional or non-positional features.
+ * This may be Float.NaN if there are no features, are none has a non-NaN
+ * score.
+ *
+ * @param positional
+ * @return
+ */
+ public float getMaximumScore(boolean positional)
+ {
+ return positional ? positionalMaxScore : nonPositionalMaxScore;
+ }
+
+ /**
+ * Answers a list of all either positional or non-positional features whose
+ * feature group matches the given group (which may be null)
+ *
+ * @param positional
+ * @param group
+ * @return
+ */
+ public List<SequenceFeature> getFeaturesForGroup(boolean positional,
+ String group)
+ {
+ List<SequenceFeature> result = new ArrayList<>();
+
+ /*
+ * if we know features don't include the target group, no need
+ * to inspect them for matches
+ */
+ if (positional && !positionalFeatureGroups.contains(group)
+ || !positional && !nonPositionalFeatureGroups.contains(group))
+ {
+ return result;
+ }
+
+ List<SequenceFeature> sfs = positional ? getPositionalFeatures()
+ : getNonPositionalFeatures();
+ for (SequenceFeature sf : sfs)
+ {
+ String featureGroup = sf.getFeatureGroup();
+ if (group == null && featureGroup == null || group != null
+ && group.equals(featureGroup))
+ {
+ result.add(sf);
+ }
+ }
+ return result;
+ }
+
+ /**
+ * Adds the shift value to the start and end of all positional features.
+ * Returns true if at least one feature was updated, else false.
+ *
+ * @param shift
+ * @return
+ */
+ public synchronized boolean shiftFeatures(int shift)
+ {
+ /*
+ * Because begin and end are final fields (to ensure the data store's
+ * integrity), we have to delete each feature and re-add it as amended.
+ * (Although a simple shift of all values would preserve data integrity!)
+ */
+ boolean modified = false;
+ for (SequenceFeature sf : getPositionalFeatures())
+ {
+ modified = true;
+ int newBegin = sf.getBegin() + shift;
+ int newEnd = sf.getEnd() + shift;
+
+ /*
+ * sanity check: don't shift left of the first residue
+ */
+ if (newEnd > 0)
+ {
+ newBegin = Math.max(1, newBegin);
+ SequenceFeature sf2 = new SequenceFeature(sf, newBegin, newEnd,
+ sf.getFeatureGroup(), sf.getScore());
+ addFeature(sf2);
+ }
+ delete(sf);
+ }
+ return modified;
+ }
+}
git://source.jalview.org / jalview.git / blobdiff