Examples with OffsetComparator gate.util.OffsetComparator used on opensource projects

Example 1 with OffsetComparator

use of gate.util.OffsetComparator in project gate-core by GateNLP.

the class LuceneDocument method getTokens.

/**
 * This method given a GATE document and other required parameters, for each
 * annotation of type indexUnitAnnotationType creates a separate list of
 * baseTokens underlying in it.
 */
private List<Token>[] getTokens(gate.Document document, AnnotationSet inputAs, List<String> featuresToInclude, List<String> featuresToExclude, String baseTokenAnnotationType, AnnotationSet baseTokenSet, String indexUnitAnnotationType, AnnotationSet indexUnitSet, Set<String> indexedFeatures) {
    boolean excludeFeatures = false;
    boolean includeFeatures = false;
    // features
    if (!featuresToInclude.isEmpty()) {
        includeFeatures = true;
    } else if (!featuresToExclude.isEmpty()) {
        excludeFeatures = true;
    }
    HashSet<OffsetGroup> unitOffsetsSet = new HashSet<OffsetGroup>();
    if (indexUnitAnnotationType == null || indexUnitAnnotationType.trim().length() == 0 || indexUnitSet == null || indexUnitSet.size() == 0) {
        // the index Unit Annotation Type is not specified
        // therefore we consider the entire document as a single unit
        OffsetGroup group = new OffsetGroup();
        group.startOffset = 0L;
        group.endOffset = document.getContent().size();
        unitOffsetsSet.add(group);
    } else {
        Iterator<Annotation> iter = indexUnitSet.iterator();
        while (iter.hasNext()) {
            Annotation annotation = iter.next();
            OffsetGroup group = new OffsetGroup();
            group.startOffset = annotation.getStartNode().getOffset();
            group.endOffset = annotation.getEndNode().getOffset();
            unitOffsetsSet.add(group);
        }
    }
    Set<String> allTypes = new HashSet<String>();
    for (String aType : inputAs.getAllTypes()) {
        if (aType.indexOf(".") > -1 || aType.indexOf("=") > -1 || aType.indexOf(";") > -1 || aType.indexOf(",") > -1) {
            System.err.println("Annotations of type " + aType + " cannot be indexed as the type name contains one of the ., =, or ; character");
            continue;
        }
        allTypes.add(aType);
    }
    if (baseTokenSet != null && baseTokenSet.size() > 0) {
        allTypes.remove(baseTokenAnnotationType);
    }
    if (indexUnitSet != null && indexUnitSet.size() > 0)
        allTypes.remove(indexUnitAnnotationType);
    AnnotationSet toUseSet = new AnnotationSetImpl(document);
    for (String type : allTypes) {
        for (Annotation a : inputAs.get(type)) {
            try {
                toUseSet.add(a.getStartNode().getOffset(), a.getEndNode().getOffset(), a.getType(), a.getFeatures());
            } catch (InvalidOffsetException ioe) {
                throw new GateRuntimeException(ioe);
            }
        }
    }
    @SuppressWarnings({ "cast", "unchecked", "rawtypes" }) List<Token>[] toReturn = (List<Token>[]) new List[unitOffsetsSet.size()];
    Iterator<OffsetGroup> iter = unitOffsetsSet.iterator();
    int counter = 0;
    while (iter.hasNext()) {
        OffsetGroup group = iter.next();
        List<Token> newTokens = new ArrayList<Token>();
        List<Annotation> tokens = new ArrayList<Annotation>(toUseSet.getContained(group.startOffset, group.endOffset));
        // add tokens from the baseTokenSet
        if (baseTokenSet != null && baseTokenSet.size() != 0) {
            tokens.addAll(baseTokenSet.getContained(group.startOffset, group.endOffset));
        }
        if (tokens.isEmpty())
            return null;
        Collections.sort(tokens, new OffsetComparator());
        int position = -1;
        for (int i = 0; i < tokens.size(); i++) {
            byte inc = 1;
            Annotation annot = tokens.get(i);
            String type = annot.getType();
            // if the feature is specified in featuresToExclude -exclude it
            if (excludeFeatures && featuresToExclude.contains(type))
                continue;
            // exclude it
            if (includeFeatures && !featuresToInclude.contains(type))
                continue;
            int startOffset = annot.getStartNode().getOffset().intValue();
            int endOffset = annot.getEndNode().getOffset().intValue();
            String text = document.getContent().toString().substring(startOffset, endOffset);
            Token token1 = new Token(type, startOffset, endOffset, "*");
            // we add extra info of position
            if (i > 0) {
                if (annot.getStartNode().getOffset().longValue() == tokens.get(i - 1).getStartNode().getOffset().longValue()) {
                    token1.setPositionIncrement(0);
                    inc = 0;
                }
            }
            position += inc;
            token1.setPosition(position);
            newTokens.add(token1);
            if (!type.equals(baseTokenAnnotationType) || (annot.getFeatures().get("string") == null)) {
                // we need to create one string feature for this
                Token tk1 = new Token(text, startOffset, endOffset, type + ".string");
                indexedFeatures.add(type + ".string");
                tk1.setPositionIncrement(0);
                tk1.setPosition(position);
                newTokens.add(tk1);
            }
            // now find out the features and add them
            FeatureMap features = annot.getFeatures();
            Iterator<Object> fIter = features.keySet().iterator();
            while (fIter.hasNext()) {
                String type1 = fIter.next().toString();
                // it
                if (excludeFeatures && featuresToExclude.contains(type + "." + type1)) {
                    continue;
                }
                // exclude it
                if (includeFeatures && !featuresToInclude.contains(type + "." + type1))
                    continue;
                Object tempText = features.get(type1);
                if (tempText == null)
                    continue;
                String text1 = tempText.toString();
                // we need to qualify the type names
                // for each annotation type feature we add AT.Feature=="**" to be able
                // to search for it
                // to calculate stats
                Token tempToken = new Token(text1, startOffset, endOffset, type + "." + type1);
                indexedFeatures.add(type + "." + type1);
                tempToken.setPositionIncrement(0);
                tempToken.setPosition(position);
                newTokens.add(tempToken);
                Token onlyATFeature = new Token(type + "." + type1, startOffset, endOffset, "**");
                onlyATFeature.setPosition(position);
                onlyATFeature.setPositionIncrement(0);
                newTokens.add(onlyATFeature);
            }
        }
        toReturn[counter] = newTokens;
        counter++;
    }
    return toReturn;
}