Examples with ValueConstraint org.apache.stanbol.entityhub.servicesapi.query.ValueConstraint used on opensource projects

Example 11 with ValueConstraint

use of org.apache.stanbol.entityhub.servicesapi.query.ValueConstraint in project stanbol by apache.

the class FieldMappingUtils method parseConstraint.

private static Constraint parseConstraint(String filterString) {
    if (filterString.startsWith("d=")) {
        String[] dataTypeStrings = filterString.substring(2).split(";");
        Set<String> dataTypes = new HashSet<String>();
        for (int i = 0; i < dataTypeStrings.length; i++) {
            DataTypeEnum dataType = DataTypeEnum.getDataTypeByShortName(dataTypeStrings[i]);
            if (dataType == null) {
                dataType = DataTypeEnum.getDataType(dataTypeStrings[i]);
            }
            if (dataType != null) {
                dataTypes.add(dataType.getUri());
            } else {
                log.warn(String.format("DataType %s not supported! Datatype get not used by this Filter", dataTypeStrings[i]));
            }
        }
        if (dataTypes.isEmpty()) {
            log.warn(String.format("Unable to parse a valied data type form \"%s\"! A data type filter MUST define at least a single dataType. No filter will be used.", filterString));
            return null;
        } else {
            return new ValueConstraint(null, dataTypes);
        }
    } else if (filterString.startsWith("@=")) {
        String[] langs = filterString.substring(2).split(";");
        for (int i = 0; i < langs.length; i++) {
            if (langs[i].length() < 1 || "null".equals(langs[i])) {
                langs[i] = null;
            }
        }
        if (langs.length < 1) {
            log.warn("Unable to parse a language form \"%s\"! A language filter MUST define at least a singel language. No filter will be used." + filterString);
            return null;
        } else {
            return new TextConstraint((String) null, langs);
        }
    } else {
        log.warn(String.format("Filters need to start with \"p=\" (dataType) or \"@=\" (language). Parsed filter: \"%s\".", filterString));
        return null;
    }
}