001// License: GPL. For details, see LICENSE file.
002package org.openstreetmap.josm.gui.mappaint.mapcss;
003
004import java.lang.reflect.InvocationTargetException;
005import java.lang.reflect.Method;
006import java.text.MessageFormat;
007import java.util.Arrays;
008import java.util.EnumSet;
009import java.util.Map;
010import java.util.Objects;
011import java.util.Set;
012import java.util.function.BiFunction;
013import java.util.function.IntFunction;
014import java.util.function.Predicate;
015import java.util.regex.Pattern;
016
017import org.openstreetmap.josm.Main;
018import org.openstreetmap.josm.actions.search.SearchCompiler.InDataSourceArea;
019import org.openstreetmap.josm.data.osm.Node;
020import org.openstreetmap.josm.data.osm.OsmPrimitive;
021import org.openstreetmap.josm.data.osm.OsmUtils;
022import org.openstreetmap.josm.data.osm.Relation;
023import org.openstreetmap.josm.data.osm.Tag;
024import org.openstreetmap.josm.data.osm.Way;
025import org.openstreetmap.josm.data.osm.visitor.paint.relations.MultipolygonCache;
026import org.openstreetmap.josm.gui.mappaint.Cascade;
027import org.openstreetmap.josm.gui.mappaint.ElemStyles;
028import org.openstreetmap.josm.gui.mappaint.Environment;
029import org.openstreetmap.josm.gui.mappaint.mapcss.Condition.Context;
030import org.openstreetmap.josm.gui.mappaint.mapcss.Condition.ToTagConvertable;
031import org.openstreetmap.josm.tools.CheckParameterUtil;
032import org.openstreetmap.josm.tools.Utils;
033
034/**
035 * Factory to generate {@link Condition}s.
036 * @since 10837 (Extracted from Condition)
037 */
038public final class ConditionFactory {
039
040    private ConditionFactory() {
041        // Hide default constructor for utils classes
042    }
043
044    /**
045     * Create a new condition that checks the key and the value of the object.
046     * @param k The key.
047     * @param v The reference value
048     * @param op The operation to use when comparing the value
049     * @param context The type of context to use.
050     * @param considerValAsKey whether to consider {@code v} as another key and compare the values of key {@code k} and key {@code v}.
051     * @return The new condition.
052     */
053    public static Condition createKeyValueCondition(String k, String v, Op op, Context context, boolean considerValAsKey) {
054        switch (context) {
055        case PRIMITIVE:
056            if (KeyValueRegexpCondition.SUPPORTED_OPS.contains(op) && !considerValAsKey)
057                return new KeyValueRegexpCondition(k, v, op, false);
058            if (!considerValAsKey && op.equals(Op.EQ))
059                return new SimpleKeyValueCondition(k, v);
060            return new KeyValueCondition(k, v, op, considerValAsKey);
061        case LINK:
062            if (considerValAsKey)
063                throw new MapCSSException("''considerValAsKey'' not supported in LINK context");
064            if ("role".equalsIgnoreCase(k))
065                return new RoleCondition(v, op);
066            else if ("index".equalsIgnoreCase(k))
067                return new IndexCondition(v, op);
068            else
069                throw new MapCSSException(
070                        MessageFormat.format("Expected key ''role'' or ''index'' in link context. Got ''{0}''.", k));
071
072        default: throw new AssertionError();
073        }
074    }
075
076    /**
077     * Create a condition in which the key and the value need to match a given regexp
078     * @param k The key regexp
079     * @param v The value regexp
080     * @param op The operation to use when comparing the key and the value.
081     * @return The new condition.
082     */
083    public static Condition createRegexpKeyRegexpValueCondition(String k, String v, Op op) {
084        return new RegexpKeyValueRegexpCondition(k, v, op);
085    }
086
087    /**
088     * Creates a condition that checks the given key.
089     * @param k The key to test for
090     * @param not <code>true</code> to invert the match
091     * @param matchType The match type to check for.
092     * @param context The context this rule is found in.
093     * @return the new condition.
094     */
095    public static Condition createKeyCondition(String k, boolean not, KeyMatchType matchType, Context context) {
096        switch (context) {
097        case PRIMITIVE:
098            return new KeyCondition(k, not, matchType);
099        case LINK:
100            if (matchType != null)
101                throw new MapCSSException("Question mark operator ''?'' and regexp match not supported in LINK context");
102            if (not)
103                return new RoleCondition(k, Op.NEQ);
104            else
105                return new RoleCondition(k, Op.EQ);
106
107        default: throw new AssertionError();
108        }
109    }
110
111    /**
112     * Create a new pseudo class condition
113     * @param id The id of the pseudo class
114     * @param not <code>true</code> to invert the condition
115     * @param context The context the class is found in.
116     * @return The new condition
117     */
118    public static PseudoClassCondition createPseudoClassCondition(String id, boolean not, Context context) {
119        return PseudoClassCondition.createPseudoClassCondition(id, not, context);
120    }
121
122    /**
123     * Create a new class condition
124     * @param id The id of the class to match
125     * @param not <code>true</code> to invert the condition
126     * @param context Ignored
127     * @return The new condition
128     */
129    public static ClassCondition createClassCondition(String id, boolean not, Context context) {
130        return new ClassCondition(id, not);
131    }
132
133    /**
134     * Create a new condition that a expression needs to be fulfilled
135     * @param e the expression to check
136     * @param context Ignored
137     * @return The new condition
138     */
139    public static ExpressionCondition createExpressionCondition(Expression e, Context context) {
140        return new ExpressionCondition(e);
141    }
142
143    /**
144     * This is the operation that {@link KeyValueCondition} uses to match.
145     */
146    public enum Op {
147        /** The value equals the given reference. */
148        EQ(Objects::equals),
149        /** The value does not equal the reference. */
150        NEQ(EQ),
151        /** The value is greater than or equal to the given reference value (as float). */
152        GREATER_OR_EQUAL(comparisonResult -> comparisonResult >= 0),
153        /** The value is greater than the given reference value (as float). */
154        GREATER(comparisonResult -> comparisonResult > 0),
155        /** The value is less than or equal to the given reference value (as float). */
156        LESS_OR_EQUAL(comparisonResult -> comparisonResult <= 0),
157        /** The value is less than the given reference value (as float). */
158        LESS(comparisonResult -> comparisonResult < 0),
159        /** The reference is treated as regular expression and the value needs to match it. */
160        REGEX((test, prototype) -> Pattern.compile(prototype).matcher(test).find()),
161        /** The reference is treated as regular expression and the value needs to not match it. */
162        NREGEX(REGEX),
163        /** The reference is treated as a list separated by ';'. Spaces around the ; are ignored.
164         *  The value needs to be equal one of the list elements. */
165        ONE_OF((test, prototype) -> Arrays.asList(test.split("\\s*;\\s*")).contains(prototype)),
166        /** The value needs to begin with the reference string. */
167        BEGINS_WITH(String::startsWith),
168        /** The value needs to end with the reference string. */
169        ENDS_WITH(String::endsWith),
170        /** The value needs to contain the reference string. */
171        CONTAINS(String::contains);
172
173        static final Set<Op> NEGATED_OPS = EnumSet.of(NEQ, NREGEX);
174
175        private final BiFunction<String, String, Boolean> function;
176
177        private final boolean negated;
178
179        /**
180         * Create a new string operation.
181         * @param func The function to apply during {@link #eval(String, String)}.
182         */
183        Op(BiFunction<String, String, Boolean> func) {
184            this.function = func;
185            negated = false;
186        }
187
188        /**
189         * Create a new float operation that compares two float values
190         * @param comparatorResult A function to mapt the result of the comparison
191         */
192        Op(IntFunction<Boolean> comparatorResult) {
193            this.function = (test, prototype) -> {
194                float testFloat;
195                try {
196                    testFloat = Float.parseFloat(test);
197                } catch (NumberFormatException e) {
198                    return false;
199                }
200                float prototypeFloat = Float.parseFloat(prototype);
201
202                int res = Float.compare(testFloat, prototypeFloat);
203                return comparatorResult.apply(res);
204            };
205            negated = false;
206        }
207
208        /**
209         * Create a new Op by negating an other op.
210         * @param negate inverse operation
211         */
212        Op(Op negate) {
213            this.function = (a, b) -> !negate.function.apply(a, b);
214            negated = true;
215        }
216
217        /**
218         * Evaluates a value against a reference string.
219         * @param testString The value. May be <code>null</code>
220         * @param prototypeString The reference string-
221         * @return <code>true</code> if and only if this operation matches for the given value/reference pair.
222         */
223        public boolean eval(String testString, String prototypeString) {
224            if (testString == null)
225                return negated;
226            else
227                return function.apply(testString, prototypeString);
228        }
229    }
230
231    /**
232     * Most common case of a KeyValueCondition, this is the basic key=value case.
233     *
234     * Extra class for performance reasons.
235     */
236    public static class SimpleKeyValueCondition implements Condition, ToTagConvertable {
237        /**
238         * The key to search for.
239         */
240        public final String k;
241        /**
242         * The value to search for.
243         */
244        public final String v;
245
246        /**
247         * Create a new SimpleKeyValueCondition.
248         * @param k The key
249         * @param v The value.
250         */
251        public SimpleKeyValueCondition(String k, String v) {
252            this.k = k;
253            this.v = v;
254        }
255
256        @Override
257        public boolean applies(Environment e) {
258            return v.equals(e.osm.get(k));
259        }
260
261        @Override
262        public Tag asTag(OsmPrimitive primitive) {
263            return new Tag(k, v);
264        }
265
266        @Override
267        public String toString() {
268            return '[' + k + '=' + v + ']';
269        }
270
271    }
272
273    /**
274     * <p>Represents a key/value condition which is either applied to a primitive.</p>
275     *
276     */
277    public static class KeyValueCondition implements Condition, ToTagConvertable {
278        /**
279         * The key to search for.
280         */
281        public final String k;
282        /**
283         * The value to search for.
284         */
285        public final String v;
286        /**
287         * The key/value match operation.
288         */
289        public final Op op;
290        /**
291         * If this flag is set, {@link #v} is treated as a key and the value is the value set for that key.
292         */
293        public final boolean considerValAsKey;
294
295        /**
296         * <p>Creates a key/value-condition.</p>
297         *
298         * @param k the key
299         * @param v the value
300         * @param op the operation
301         * @param considerValAsKey whether to consider {@code v} as another key and compare the values of key {@code k} and key {@code v}.
302         */
303        public KeyValueCondition(String k, String v, Op op, boolean considerValAsKey) {
304            this.k = k;
305            this.v = v;
306            this.op = op;
307            this.considerValAsKey = considerValAsKey;
308        }
309
310        @Override
311        public boolean applies(Environment env) {
312            return op.eval(env.osm.get(k), considerValAsKey ? env.osm.get(v) : v);
313        }
314
315        @Override
316        public Tag asTag(OsmPrimitive primitive) {
317            return new Tag(k, v);
318        }
319
320        @Override
321        public String toString() {
322            return '[' + k + '\'' + op + '\'' + v + ']';
323        }
324    }
325
326    /**
327     * This condition requires a fixed key to match a given regexp
328     */
329    public static class KeyValueRegexpCondition extends KeyValueCondition {
330        protected static final Set<Op> SUPPORTED_OPS = EnumSet.of(Op.REGEX, Op.NREGEX);
331
332        final Pattern pattern;
333
334        /**
335         * Constructs a new {@code KeyValueRegexpCondition}.
336         * @param k key
337         * @param v value
338         * @param op operation
339         * @param considerValAsKey must be false
340         */
341        public KeyValueRegexpCondition(String k, String v, Op op, boolean considerValAsKey) {
342            super(k, v, op, considerValAsKey);
343            CheckParameterUtil.ensureThat(!considerValAsKey, "considerValAsKey is not supported");
344            CheckParameterUtil.ensureThat(SUPPORTED_OPS.contains(op), "Op must be REGEX or NREGEX");
345            this.pattern = Pattern.compile(v);
346        }
347
348        protected boolean matches(Environment env) {
349            final String value = env.osm.get(k);
350            return value != null && pattern.matcher(value).find();
351        }
352
353        @Override
354        public boolean applies(Environment env) {
355            if (Op.REGEX.equals(op)) {
356                return matches(env);
357            } else if (Op.NREGEX.equals(op)) {
358                return !matches(env);
359            } else {
360                throw new IllegalStateException();
361            }
362        }
363    }
364
365    /**
366     * A condition that checks that a key with the matching pattern has a value with the matching pattern.
367     */
368    public static class RegexpKeyValueRegexpCondition extends KeyValueRegexpCondition {
369
370        final Pattern keyPattern;
371
372        /**
373         * Create a condition in which the key and the value need to match a given regexp
374         * @param k The key regexp
375         * @param v The value regexp
376         * @param op The operation to use when comparing the key and the value.
377         */
378        public RegexpKeyValueRegexpCondition(String k, String v, Op op) {
379            super(k, v, op, false);
380            this.keyPattern = Pattern.compile(k);
381        }
382
383        @Override
384        protected boolean matches(Environment env) {
385            for (Map.Entry<String, String> kv: env.osm.getKeys().entrySet()) {
386                if (keyPattern.matcher(kv.getKey()).find() && pattern.matcher(kv.getValue()).find()) {
387                    return true;
388                }
389            }
390            return false;
391        }
392    }
393
394    /**
395     * Role condition.
396     */
397    public static class RoleCondition implements Condition {
398        final String role;
399        final Op op;
400
401        /**
402         * Constructs a new {@code RoleCondition}.
403         * @param role role
404         * @param op operation
405         */
406        public RoleCondition(String role, Op op) {
407            this.role = role;
408            this.op = op;
409        }
410
411        @Override
412        public boolean applies(Environment env) {
413            String testRole = env.getRole();
414            if (testRole == null) return false;
415            return op.eval(testRole, role);
416        }
417    }
418
419    /**
420     * Index condition.
421     */
422    public static class IndexCondition implements Condition {
423        final String index;
424        final Op op;
425
426        /**
427         * Constructs a new {@code IndexCondition}.
428         * @param index index
429         * @param op operation
430         */
431        public IndexCondition(String index, Op op) {
432            this.index = index;
433            this.op = op;
434        }
435
436        @Override
437        public boolean applies(Environment env) {
438            if (env.index == null) return false;
439            if (index.startsWith("-")) {
440                return env.count != null && op.eval(Integer.toString(env.index - env.count), index);
441            } else {
442                return op.eval(Integer.toString(env.index + 1), index);
443            }
444        }
445    }
446
447    /**
448     * This defines how {@link KeyCondition} matches a given key.
449     */
450    public enum KeyMatchType {
451        /**
452         * The key needs to be equal to the given label.
453         */
454        EQ,
455        /**
456         * The key needs to have a true value (yes, ...)
457         * @see OsmUtils#isTrue(String)
458         */
459        TRUE,
460        /**
461         * The key needs to have a false value (no, ...)
462         * @see OsmUtils#isFalse(String)
463         */
464        FALSE,
465        /**
466         * The key needs to match the given regular expression.
467         */
468        REGEX
469    }
470
471    /**
472     * <p>KeyCondition represent one of the following conditions in either the link or the
473     * primitive context:</p>
474     * <pre>
475     *     ["a label"]  PRIMITIVE:   the primitive has a tag "a label"
476     *                  LINK:        the parent is a relation and it has at least one member with the role
477     *                               "a label" referring to the child
478     *
479     *     [!"a label"]  PRIMITIVE:  the primitive doesn't have a tag "a label"
480     *                   LINK:       the parent is a relation but doesn't have a member with the role
481     *                               "a label" referring to the child
482     *
483     *     ["a label"?]  PRIMITIVE:  the primitive has a tag "a label" whose value evaluates to a true-value
484     *                   LINK:       not supported
485     *
486     *     ["a label"?!] PRIMITIVE:  the primitive has a tag "a label" whose value evaluates to a false-value
487     *                   LINK:       not supported
488     * </pre>
489     */
490    public static class KeyCondition implements Condition, ToTagConvertable {
491
492        /**
493         * The key name.
494         */
495        public final String label;
496        /**
497         * If we should negate the result of the match.
498         */
499        public final boolean negateResult;
500        /**
501         * Describes how to match the label against the key.
502         * @see KeyMatchType
503         */
504        public final KeyMatchType matchType;
505        /**
506         * A predicate used to match a the regexp against the key. Only used if the match type is regexp.
507         */
508        public final Predicate<String> containsPattern;
509
510        /**
511         * Creates a new KeyCondition
512         * @param label The key name (or regexp) to use.
513         * @param negateResult If we should negate the result.,
514         * @param matchType The match type.
515         */
516        public KeyCondition(String label, boolean negateResult, KeyMatchType matchType) {
517            this.label = label;
518            this.negateResult = negateResult;
519            this.matchType = matchType == null ? KeyMatchType.EQ : matchType;
520            this.containsPattern = KeyMatchType.REGEX.equals(matchType)
521                    ? Pattern.compile(label).asPredicate()
522                    : null;
523        }
524
525        @Override
526        public boolean applies(Environment e) {
527            switch(e.getContext()) {
528            case PRIMITIVE:
529                switch (matchType) {
530                case TRUE:
531                    return e.osm.isKeyTrue(label) ^ negateResult;
532                case FALSE:
533                    return e.osm.isKeyFalse(label) ^ negateResult;
534                case REGEX:
535                    return e.osm.keySet().stream().anyMatch(containsPattern) ^ negateResult;
536                default:
537                    return e.osm.hasKey(label) ^ negateResult;
538                }
539            case LINK:
540                Utils.ensure(false, "Illegal state: KeyCondition not supported in LINK context");
541                return false;
542            default: throw new AssertionError();
543            }
544        }
545
546        /**
547         * Get the matched key and the corresponding value.
548         * <p>
549         * WARNING: This ignores {@link #negateResult}.
550         * <p>
551         * WARNING: For regexp, the regular expression is returned instead of a key if the match failed.
552         * @param p The primitive to get the value from.
553         * @return The tag.
554         */
555        @Override
556        public Tag asTag(OsmPrimitive p) {
557            String key = label;
558            if (KeyMatchType.REGEX.equals(matchType)) {
559                key = p.keySet().stream().filter(containsPattern).findAny().orElse(key);
560            }
561            return new Tag(key, p.get(key));
562        }
563
564        @Override
565        public String toString() {
566            return '[' + (negateResult ? "!" : "") + label + ']';
567        }
568    }
569
570    /**
571     * Class condition.
572     */
573    public static class ClassCondition implements Condition {
574
575        /** Class identifier */
576        public final String id;
577        final boolean not;
578
579        /**
580         * Constructs a new {@code ClassCondition}.
581         * @param id id
582         * @param not negation or not
583         */
584        public ClassCondition(String id, boolean not) {
585            this.id = id;
586            this.not = not;
587        }
588
589        @Override
590        public boolean applies(Environment env) {
591            Cascade cascade = env.getCascade(env.layer);
592            return cascade != null && (not ^ cascade.containsKey(id));
593        }
594
595        @Override
596        public String toString() {
597            return (not ? "!" : "") + '.' + id;
598        }
599    }
600
601    /**
602     * Like <a href="http://www.w3.org/TR/css3-selectors/#pseudo-classes">CSS pseudo classes</a>, MapCSS pseudo classes
603     * are written in lower case with dashes between words.
604     */
605    public static final class PseudoClasses {
606
607        private PseudoClasses() {
608            // Hide default constructor for utilities classes
609        }
610
611        /**
612         * {@code closed} tests whether the way is closed or the relation is a closed multipolygon
613         * @param e MapCSS environment
614         * @return {@code true} if the way is closed or the relation is a closed multipolygon
615         */
616        static boolean closed(Environment e) { // NO_UCD (unused code)
617            if (e.osm instanceof Way && ((Way) e.osm).isClosed())
618                return true;
619            if (e.osm instanceof Relation && ((Relation) e.osm).isMultipolygon())
620                return true;
621            return false;
622        }
623
624        /**
625         * {@code :modified} tests whether the object has been modified.
626         * @param e MapCSS environment
627         * @return {@code true} if the object has been modified
628         * @see OsmPrimitive#isModified()
629         */
630        static boolean modified(Environment e) { // NO_UCD (unused code)
631            return e.osm.isModified() || e.osm.isNewOrUndeleted();
632        }
633
634        /**
635         * {@code ;new} tests whether the object is new.
636         * @param e MapCSS environment
637         * @return {@code true} if the object is new
638         * @see OsmPrimitive#isNew()
639         */
640        static boolean _new(Environment e) { // NO_UCD (unused code)
641            return e.osm.isNew();
642        }
643
644        /**
645         * {@code :connection} tests whether the object is a connection node.
646         * @param e MapCSS environment
647         * @return {@code true} if the object is a connection node
648         * @see Node#isConnectionNode()
649         */
650        static boolean connection(Environment e) { // NO_UCD (unused code)
651            return e.osm instanceof Node && e.osm.getDataSet() != null && ((Node) e.osm).isConnectionNode();
652        }
653
654        /**
655         * {@code :tagged} tests whether the object is tagged.
656         * @param e MapCSS environment
657         * @return {@code true} if the object is tagged
658         * @see OsmPrimitive#isTagged()
659         */
660        static boolean tagged(Environment e) { // NO_UCD (unused code)
661            return e.osm.isTagged();
662        }
663
664        /**
665         * {@code :same-tags} tests whether the object has the same tags as its child/parent.
666         * @param e MapCSS environment
667         * @return {@code true} if the object has the same tags as its child/parent
668         * @see OsmPrimitive#hasSameInterestingTags(OsmPrimitive)
669         */
670        static boolean sameTags(Environment e) { // NO_UCD (unused code)
671            return e.osm.hasSameInterestingTags(Utils.firstNonNull(e.child, e.parent));
672        }
673
674        /**
675         * {@code :area-style} tests whether the object has an area style. This is useful for validators.
676         * @param e MapCSS environment
677         * @return {@code true} if the object has an area style
678         * @see ElemStyles#hasAreaElemStyle(OsmPrimitive, boolean)
679         */
680        static boolean areaStyle(Environment e) { // NO_UCD (unused code)
681            // only for validator
682            return ElemStyles.hasAreaElemStyle(e.osm, false);
683        }
684
685        /**
686         * {@code unconnected}: tests whether the object is a unconnected node.
687         * @param e MapCSS environment
688         * @return {@code true} if the object is a unconnected node
689         */
690        static boolean unconnected(Environment e) { // NO_UCD (unused code)
691            return e.osm instanceof Node && OsmPrimitive.getFilteredList(e.osm.getReferrers(), Way.class).isEmpty();
692        }
693
694        /**
695         * {@code righthandtraffic} checks if there is right-hand traffic at the current location.
696         * @param e MapCSS environment
697         * @return {@code true} if there is right-hand traffic at the current location
698         * @see ExpressionFactory.Functions#is_right_hand_traffic(Environment)
699         */
700        static boolean righthandtraffic(Environment e) { // NO_UCD (unused code)
701            return ExpressionFactory.Functions.is_right_hand_traffic(e);
702        }
703
704        /**
705         * {@code clockwise} whether the way is closed and oriented clockwise,
706         * or non-closed and the 1st, 2nd and last node are in clockwise order.
707         * @param e MapCSS environment
708         * @return {@code true} if the way clockwise
709         * @see ExpressionFactory.Functions#is_clockwise(Environment)
710         */
711        static boolean clockwise(Environment e) { // NO_UCD (unused code)
712            return ExpressionFactory.Functions.is_clockwise(e);
713        }
714
715        /**
716         * {@code anticlockwise} whether the way is closed and oriented anticlockwise,
717         * or non-closed and the 1st, 2nd and last node are in anticlockwise order.
718         * @param e MapCSS environment
719         * @return {@code true} if the way clockwise
720         * @see ExpressionFactory.Functions#is_anticlockwise(Environment)
721         */
722        static boolean anticlockwise(Environment e) { // NO_UCD (unused code)
723            return ExpressionFactory.Functions.is_anticlockwise(e);
724        }
725
726        /**
727         * {@code unclosed-multipolygon} tests whether the object is an unclosed multipolygon.
728         * @param e MapCSS environment
729         * @return {@code true} if the object is an unclosed multipolygon
730         */
731        static boolean unclosed_multipolygon(Environment e) { // NO_UCD (unused code)
732            return e.osm instanceof Relation && ((Relation) e.osm).isMultipolygon() &&
733                    !e.osm.isIncomplete() && !((Relation) e.osm).hasIncompleteMembers() &&
734                    !MultipolygonCache.getInstance().get(Main.map.mapView, (Relation) e.osm).getOpenEnds().isEmpty();
735        }
736
737        private static final Predicate<OsmPrimitive> IN_DOWNLOADED_AREA = new InDataSourceArea(false);
738
739        /**
740         * {@code in-downloaded-area} tests whether the object is within source area ("downloaded area").
741         * @param e MapCSS environment
742         * @return {@code true} if the object is within source area ("downloaded area")
743         * @see InDataSourceArea
744         */
745        static boolean inDownloadedArea(Environment e) { // NO_UCD (unused code)
746            return IN_DOWNLOADED_AREA.test(e.osm);
747        }
748
749        static boolean completely_downloaded(Environment e) { // NO_UCD (unused code)
750            if (e.osm instanceof Relation) {
751                return !((Relation) e.osm).hasIncompleteMembers();
752            } else {
753                return true;
754            }
755        }
756
757        static boolean closed2(Environment e) { // NO_UCD (unused code)
758            if (e.osm instanceof Way && ((Way) e.osm).isClosed())
759                return true;
760            if (e.osm instanceof Relation && ((Relation) e.osm).isMultipolygon())
761                return MultipolygonCache.getInstance().get(Main.map.mapView, (Relation) e.osm).getOpenEnds().isEmpty();
762            return false;
763        }
764
765        static boolean selected(Environment e) { // NO_UCD (unused code)
766            Cascade c = e.mc.getCascade(e.layer);
767            c.setDefaultSelectedHandling(false);
768            return e.osm.isSelected();
769        }
770    }
771
772    /**
773     * Pseudo class condition.
774     */
775    public static class PseudoClassCondition implements Condition {
776
777        final Method method;
778        final boolean not;
779
780        protected PseudoClassCondition(Method method, boolean not) {
781            this.method = method;
782            this.not = not;
783        }
784
785        /**
786         * Create a new pseudo class condition
787         * @param id The id of the pseudo class
788         * @param not <code>true</code> to invert the condition
789         * @param context The context the class is found in.
790         * @return The new condition
791         */
792        public static PseudoClassCondition createPseudoClassCondition(String id, boolean not, Context context) {
793            CheckParameterUtil.ensureThat(!"sameTags".equals(id) || Context.LINK.equals(context), "sameTags only supported in LINK context");
794            if ("open_end".equals(id)) {
795                return new OpenEndPseudoClassCondition(not);
796            }
797            final Method method = getMethod(id);
798            if (method != null) {
799                return new PseudoClassCondition(method, not);
800            }
801            throw new MapCSSException("Invalid pseudo class specified: " + id);
802        }
803
804        protected static Method getMethod(String id) {
805            String cleanId = id.replaceAll("-|_", "");
806            for (Method method : PseudoClasses.class.getDeclaredMethods()) {
807                // for backwards compatibility, consider :sameTags == :same-tags == :same_tags (#11150)
808                final String methodName = method.getName().replaceAll("-|_", "");
809                if (methodName.equalsIgnoreCase(cleanId)) {
810                    return method;
811                }
812            }
813            return null;
814        }
815
816        @Override
817        public boolean applies(Environment e) {
818            try {
819                return not ^ (Boolean) method.invoke(null, e);
820            } catch (IllegalAccessException | InvocationTargetException ex) {
821                throw new RuntimeException(ex);
822            }
823        }
824
825        @Override
826        public String toString() {
827            return (not ? "!" : "") + ':' + method.getName();
828        }
829    }
830
831    /**
832     * Open end pseudo class condition.
833     */
834    public static class OpenEndPseudoClassCondition extends PseudoClassCondition {
835        /**
836         * Constructs a new {@code OpenEndPseudoClassCondition}.
837         * @param not negation or not
838         */
839        public OpenEndPseudoClassCondition(boolean not) {
840            super(null, not);
841        }
842
843        @Override
844        public boolean applies(Environment e) {
845            return true;
846        }
847    }
848
849    /**
850     * A condition that is fulfilled whenever the expression is evaluated to be true.
851     */
852    public static class ExpressionCondition implements Condition {
853
854        final Expression e;
855
856        /**
857         * Constructs a new {@code ExpressionFactory}
858         * @param e expression
859         */
860        public ExpressionCondition(Expression e) {
861            this.e = e;
862        }
863
864        @Override
865        public boolean applies(Environment env) {
866            Boolean b = Cascade.convertTo(e.evaluate(env), Boolean.class);
867            return b != null && b;
868        }
869
870        @Override
871        public String toString() {
872            return '[' + e.toString() + ']';
873        }
874    }
875}