001// License: GPL. For details, see LICENSE file.
002package org.openstreetmap.josm.gui.mappaint.mapcss;
003
004import java.lang.reflect.Method;
005import java.text.MessageFormat;
006import java.util.Arrays;
007import java.util.EnumSet;
008import java.util.Map;
009import java.util.Objects;
010import java.util.Set;
011import java.util.function.BiFunction;
012import java.util.function.IntFunction;
013import java.util.function.Predicate;
014import java.util.regex.Pattern;
015import java.util.regex.PatternSyntaxException;
016
017import org.openstreetmap.josm.data.osm.IPrimitive;
018import org.openstreetmap.josm.data.osm.Node;
019import org.openstreetmap.josm.data.osm.OsmPrimitive;
020import org.openstreetmap.josm.data.osm.OsmUtils;
021import org.openstreetmap.josm.data.osm.Relation;
022import org.openstreetmap.josm.data.osm.Tag;
023import org.openstreetmap.josm.data.osm.Way;
024import org.openstreetmap.josm.data.osm.search.SearchCompiler.InDataSourceArea;
025import org.openstreetmap.josm.data.osm.visitor.paint.relations.Multipolygon;
026import org.openstreetmap.josm.data.osm.visitor.paint.relations.MultipolygonCache;
027import org.openstreetmap.josm.gui.mappaint.Cascade;
028import org.openstreetmap.josm.gui.mappaint.ElemStyles;
029import org.openstreetmap.josm.gui.mappaint.Environment;
030import org.openstreetmap.josm.gui.mappaint.mapcss.Condition.Context;
031import org.openstreetmap.josm.gui.mappaint.mapcss.Condition.ToTagConvertable;
032import org.openstreetmap.josm.tools.CheckParameterUtil;
033import org.openstreetmap.josm.tools.JosmRuntimeException;
034import org.openstreetmap.josm.tools.Utils;
035
036/**
037 * Factory to generate {@link Condition}s.
038 * @since 10837 (Extracted from Condition)
039 */
040public final class ConditionFactory {
041
042    private ConditionFactory() {
043        // Hide default constructor for utils classes
044    }
045
046    /**
047     * Create a new condition that checks the key and the value of the object.
048     * @param k The key.
049     * @param v The reference value
050     * @param op The operation to use when comparing the value
051     * @param context The type of context to use.
052     * @param considerValAsKey whether to consider {@code v} as another key and compare the values of key {@code k} and key {@code v}.
053     * @return The new condition.
054     * @throws MapCSSException if the arguments are incorrect
055     */
056    public static Condition createKeyValueCondition(String k, String v, Op op, Context context, boolean considerValAsKey) {
057        switch (context) {
058        case PRIMITIVE:
059            if (KeyValueRegexpCondition.SUPPORTED_OPS.contains(op) && !considerValAsKey) {
060                try {
061                    return new KeyValueRegexpCondition(k, v, op, false);
062                } catch (PatternSyntaxException e) {
063                    throw new MapCSSException(e);
064                }
065            }
066            if (!considerValAsKey && op.equals(Op.EQ))
067                return new SimpleKeyValueCondition(k, v);
068            return new KeyValueCondition(k, v, op, considerValAsKey);
069        case LINK:
070            if (considerValAsKey)
071                throw new MapCSSException("''considerValAsKey'' not supported in LINK context");
072            if ("role".equalsIgnoreCase(k))
073                return new RoleCondition(v, op);
074            else if ("index".equalsIgnoreCase(k))
075                return new IndexCondition(v, op);
076            else
077                throw new MapCSSException(
078                        MessageFormat.format("Expected key ''role'' or ''index'' in link context. Got ''{0}''.", k));
079
080        default: throw new AssertionError();
081        }
082    }
083
084    /**
085     * Create a condition in which the key and the value need to match a given regexp
086     * @param k The key regexp
087     * @param v The value regexp
088     * @param op The operation to use when comparing the key and the value.
089     * @return The new condition.
090     */
091    public static Condition createRegexpKeyRegexpValueCondition(String k, String v, Op op) {
092        return new RegexpKeyValueRegexpCondition(k, v, op);
093    }
094
095    /**
096     * Creates a condition that checks the given key.
097     * @param k The key to test for
098     * @param not <code>true</code> to invert the match
099     * @param matchType The match type to check for.
100     * @param context The context this rule is found in.
101     * @return the new condition.
102     */
103    public static Condition createKeyCondition(String k, boolean not, KeyMatchType matchType, Context context) {
104        switch (context) {
105        case PRIMITIVE:
106            return new KeyCondition(k, not, matchType);
107        case LINK:
108            if (matchType != null)
109                throw new MapCSSException("Question mark operator ''?'' and regexp match not supported in LINK context");
110            if (not)
111                return new RoleCondition(k, Op.NEQ);
112            else
113                return new RoleCondition(k, Op.EQ);
114
115        default: throw new AssertionError();
116        }
117    }
118
119    /**
120     * Create a new pseudo class condition
121     * @param id The id of the pseudo class
122     * @param not <code>true</code> to invert the condition
123     * @param context The context the class is found in.
124     * @return The new condition
125     */
126    public static PseudoClassCondition createPseudoClassCondition(String id, boolean not, Context context) {
127        return PseudoClassCondition.createPseudoClassCondition(id, not, context);
128    }
129
130    /**
131     * Create a new class condition
132     * @param id The id of the class to match
133     * @param not <code>true</code> to invert the condition
134     * @param context Ignored
135     * @return The new condition
136     */
137    public static ClassCondition createClassCondition(String id, boolean not, Context context) {
138        return new ClassCondition(id, not);
139    }
140
141    /**
142     * Create a new condition that a expression needs to be fulfilled
143     * @param e the expression to check
144     * @param context Ignored
145     * @return The new condition
146     */
147    public static ExpressionCondition createExpressionCondition(Expression e, Context context) {
148        return new ExpressionCondition(e);
149    }
150
151    /**
152     * This is the operation that {@link KeyValueCondition} uses to match.
153     */
154    public enum Op {
155        /** The value equals the given reference. */
156        EQ(Objects::equals),
157        /** The value does not equal the reference. */
158        NEQ(EQ),
159        /** The value is greater than or equal to the given reference value (as float). */
160        GREATER_OR_EQUAL(comparisonResult -> comparisonResult >= 0),
161        /** The value is greater than the given reference value (as float). */
162        GREATER(comparisonResult -> comparisonResult > 0),
163        /** The value is less than or equal to the given reference value (as float). */
164        LESS_OR_EQUAL(comparisonResult -> comparisonResult <= 0),
165        /** The value is less than the given reference value (as float). */
166        LESS(comparisonResult -> comparisonResult < 0),
167        /** The reference is treated as regular expression and the value needs to match it. */
168        REGEX((test, prototype) -> Pattern.compile(prototype).matcher(test).find()),
169        /** The reference is treated as regular expression and the value needs to not match it. */
170        NREGEX(REGEX),
171        /** The reference is treated as a list separated by ';'. Spaces around the ; are ignored.
172         *  The value needs to be equal one of the list elements. */
173        ONE_OF((test, prototype) -> Arrays.asList(test.split("\\s*;\\s*")).contains(prototype)),
174        /** The value needs to begin with the reference string. */
175        BEGINS_WITH(String::startsWith),
176        /** The value needs to end with the reference string. */
177        ENDS_WITH(String::endsWith),
178        /** The value needs to contain the reference string. */
179        CONTAINS(String::contains);
180
181        static final Set<Op> NEGATED_OPS = EnumSet.of(NEQ, NREGEX);
182
183        private final BiFunction<String, String, Boolean> function;
184
185        private final boolean negated;
186
187        /**
188         * Create a new string operation.
189         * @param func The function to apply during {@link #eval(String, String)}.
190         */
191        Op(BiFunction<String, String, Boolean> func) {
192            this.function = func;
193            negated = false;
194        }
195
196        /**
197         * Create a new float operation that compares two float values
198         * @param comparatorResult A function to mapt the result of the comparison
199         */
200        Op(IntFunction<Boolean> comparatorResult) {
201            this.function = (test, prototype) -> {
202                float testFloat;
203                try {
204                    testFloat = Float.parseFloat(test);
205                } catch (NumberFormatException e) {
206                    return Boolean.FALSE;
207                }
208                float prototypeFloat = Float.parseFloat(prototype);
209
210                int res = Float.compare(testFloat, prototypeFloat);
211                return comparatorResult.apply(res);
212            };
213            negated = false;
214        }
215
216        /**
217         * Create a new Op by negating an other op.
218         * @param negate inverse operation
219         */
220        Op(Op negate) {
221            this.function = (a, b) -> !negate.function.apply(a, b);
222            negated = true;
223        }
224
225        /**
226         * Evaluates a value against a reference string.
227         * @param testString The value. May be <code>null</code>
228         * @param prototypeString The reference string-
229         * @return <code>true</code> if and only if this operation matches for the given value/reference pair.
230         */
231        public boolean eval(String testString, String prototypeString) {
232            if (testString == null)
233                return negated;
234            else
235                return function.apply(testString, prototypeString);
236        }
237    }
238
239    /**
240     * Most common case of a KeyValueCondition, this is the basic key=value case.
241     *
242     * Extra class for performance reasons.
243     */
244    public static class SimpleKeyValueCondition implements Condition, ToTagConvertable {
245        /**
246         * The key to search for.
247         */
248        public final String k;
249        /**
250         * The value to search for.
251         */
252        public final String v;
253
254        /**
255         * Create a new SimpleKeyValueCondition.
256         * @param k The key
257         * @param v The value.
258         */
259        public SimpleKeyValueCondition(String k, String v) {
260            this.k = k;
261            this.v = v;
262        }
263
264        @Override
265        public boolean applies(Environment e) {
266            return v.equals(e.osm.get(k));
267        }
268
269        @Override
270        public Tag asTag(OsmPrimitive primitive) {
271            return new Tag(k, v);
272        }
273
274        @Override
275        public String toString() {
276            return '[' + k + '=' + v + ']';
277        }
278
279    }
280
281    /**
282     * <p>Represents a key/value condition which is either applied to a primitive.</p>
283     *
284     */
285    public static class KeyValueCondition implements Condition, ToTagConvertable {
286        /**
287         * The key to search for.
288         */
289        public final String k;
290        /**
291         * The value to search for.
292         */
293        public final String v;
294        /**
295         * The key/value match operation.
296         */
297        public final Op op;
298        /**
299         * If this flag is set, {@link #v} is treated as a key and the value is the value set for that key.
300         */
301        public final boolean considerValAsKey;
302
303        /**
304         * <p>Creates a key/value-condition.</p>
305         *
306         * @param k the key
307         * @param v the value
308         * @param op the operation
309         * @param considerValAsKey whether to consider {@code v} as another key and compare the values of key {@code k} and key {@code v}.
310         */
311        public KeyValueCondition(String k, String v, Op op, boolean considerValAsKey) {
312            this.k = k;
313            this.v = v;
314            this.op = op;
315            this.considerValAsKey = considerValAsKey;
316        }
317
318        @Override
319        public boolean applies(Environment env) {
320            return op.eval(env.osm.get(k), considerValAsKey ? env.osm.get(v) : v);
321        }
322
323        @Override
324        public Tag asTag(OsmPrimitive primitive) {
325            return new Tag(k, v);
326        }
327
328        @Override
329        public String toString() {
330            return '[' + k + '\'' + op + '\'' + v + ']';
331        }
332    }
333
334    /**
335     * This condition requires a fixed key to match a given regexp
336     */
337    public static class KeyValueRegexpCondition extends KeyValueCondition {
338        protected static final Set<Op> SUPPORTED_OPS = EnumSet.of(Op.REGEX, Op.NREGEX);
339
340        final Pattern pattern;
341
342        /**
343         * Constructs a new {@code KeyValueRegexpCondition}.
344         * @param k key
345         * @param v value
346         * @param op operation
347         * @param considerValAsKey must be false
348         * @throws PatternSyntaxException if the value syntax is invalid
349         */
350        public KeyValueRegexpCondition(String k, String v, Op op, boolean considerValAsKey) {
351            super(k, v, op, considerValAsKey);
352            CheckParameterUtil.ensureThat(!considerValAsKey, "considerValAsKey is not supported");
353            CheckParameterUtil.ensureThat(SUPPORTED_OPS.contains(op), "Op must be REGEX or NREGEX");
354            this.pattern = Pattern.compile(v);
355        }
356
357        protected boolean matches(Environment env) {
358            final String value = env.osm.get(k);
359            return value != null && pattern.matcher(value).find();
360        }
361
362        @Override
363        public boolean applies(Environment env) {
364            if (Op.REGEX.equals(op)) {
365                return matches(env);
366            } else if (Op.NREGEX.equals(op)) {
367                return !matches(env);
368            } else {
369                throw new IllegalStateException();
370            }
371        }
372    }
373
374    /**
375     * A condition that checks that a key with the matching pattern has a value with the matching pattern.
376     */
377    public static class RegexpKeyValueRegexpCondition extends KeyValueRegexpCondition {
378
379        final Pattern keyPattern;
380
381        /**
382         * Create a condition in which the key and the value need to match a given regexp
383         * @param k The key regexp
384         * @param v The value regexp
385         * @param op The operation to use when comparing the key and the value.
386         */
387        public RegexpKeyValueRegexpCondition(String k, String v, Op op) {
388            super(k, v, op, false);
389            this.keyPattern = Pattern.compile(k);
390        }
391
392        @Override
393        protected boolean matches(Environment env) {
394            for (Map.Entry<String, String> kv: env.osm.getKeys().entrySet()) {
395                if (keyPattern.matcher(kv.getKey()).find() && pattern.matcher(kv.getValue()).find()) {
396                    return true;
397                }
398            }
399            return false;
400        }
401    }
402
403    /**
404     * Role condition.
405     */
406    public static class RoleCondition implements Condition {
407        final String role;
408        final Op op;
409
410        /**
411         * Constructs a new {@code RoleCondition}.
412         * @param role role
413         * @param op operation
414         */
415        public RoleCondition(String role, Op op) {
416            this.role = role;
417            this.op = op;
418        }
419
420        @Override
421        public boolean applies(Environment env) {
422            String testRole = env.getRole();
423            if (testRole == null) return false;
424            return op.eval(testRole, role);
425        }
426    }
427
428    /**
429     * Index condition.
430     */
431    public static class IndexCondition implements Condition {
432        final String index;
433        final Op op;
434
435        /**
436         * Constructs a new {@code IndexCondition}.
437         * @param index index
438         * @param op operation
439         */
440        public IndexCondition(String index, Op op) {
441            this.index = index;
442            this.op = op;
443        }
444
445        @Override
446        public boolean applies(Environment env) {
447            if (env.index == null) return false;
448            if (index.startsWith("-")) {
449                return env.count != null && op.eval(Integer.toString(env.index - env.count), index);
450            } else {
451                return op.eval(Integer.toString(env.index + 1), index);
452            }
453        }
454    }
455
456    /**
457     * This defines how {@link KeyCondition} matches a given key.
458     */
459    public enum KeyMatchType {
460        /**
461         * The key needs to be equal to the given label.
462         */
463        EQ,
464        /**
465         * The key needs to have a true value (yes, ...)
466         * @see OsmUtils#isTrue(String)
467         */
468        TRUE,
469        /**
470         * The key needs to have a false value (no, ...)
471         * @see OsmUtils#isFalse(String)
472         */
473        FALSE,
474        /**
475         * The key needs to match the given regular expression.
476         */
477        REGEX
478    }
479
480    /**
481     * <p>KeyCondition represent one of the following conditions in either the link or the
482     * primitive context:</p>
483     * <pre>
484     *     ["a label"]  PRIMITIVE:   the primitive has a tag "a label"
485     *                  LINK:        the parent is a relation and it has at least one member with the role
486     *                               "a label" referring to the child
487     *
488     *     [!"a label"]  PRIMITIVE:  the primitive doesn't have a tag "a label"
489     *                   LINK:       the parent is a relation but doesn't have a member with the role
490     *                               "a label" referring to the child
491     *
492     *     ["a label"?]  PRIMITIVE:  the primitive has a tag "a label" whose value evaluates to a true-value
493     *                   LINK:       not supported
494     *
495     *     ["a label"?!] PRIMITIVE:  the primitive has a tag "a label" whose value evaluates to a false-value
496     *                   LINK:       not supported
497     * </pre>
498     */
499    public static class KeyCondition implements Condition, ToTagConvertable {
500
501        /**
502         * The key name.
503         */
504        public final String label;
505        /**
506         * If we should negate the result of the match.
507         */
508        public final boolean negateResult;
509        /**
510         * Describes how to match the label against the key.
511         * @see KeyMatchType
512         */
513        public final KeyMatchType matchType;
514        /**
515         * A predicate used to match a the regexp against the key. Only used if the match type is regexp.
516         */
517        public final Predicate<String> containsPattern;
518
519        /**
520         * Creates a new KeyCondition
521         * @param label The key name (or regexp) to use.
522         * @param negateResult If we should negate the result.,
523         * @param matchType The match type.
524         */
525        public KeyCondition(String label, boolean negateResult, KeyMatchType matchType) {
526            this.label = label;
527            this.negateResult = negateResult;
528            this.matchType = matchType == null ? KeyMatchType.EQ : matchType;
529            this.containsPattern = KeyMatchType.REGEX.equals(matchType)
530                    ? Pattern.compile(label).asPredicate()
531                    : null;
532        }
533
534        @Override
535        public boolean applies(Environment e) {
536            switch(e.getContext()) {
537            case PRIMITIVE:
538                switch (matchType) {
539                case TRUE:
540                    return e.osm.isKeyTrue(label) ^ negateResult;
541                case FALSE:
542                    return e.osm.isKeyFalse(label) ^ negateResult;
543                case REGEX:
544                    return e.osm.keySet().stream().anyMatch(containsPattern) ^ negateResult;
545                default:
546                    return e.osm.hasKey(label) ^ negateResult;
547                }
548            case LINK:
549                Utils.ensure(false, "Illegal state: KeyCondition not supported in LINK context");
550                return false;
551            default: throw new AssertionError();
552            }
553        }
554
555        /**
556         * Get the matched key and the corresponding value.
557         * <p>
558         * WARNING: This ignores {@link #negateResult}.
559         * <p>
560         * WARNING: For regexp, the regular expression is returned instead of a key if the match failed.
561         * @param p The primitive to get the value from.
562         * @return The tag.
563         */
564        @Override
565        public Tag asTag(OsmPrimitive p) {
566            String key = label;
567            if (KeyMatchType.REGEX.equals(matchType)) {
568                key = p.keySet().stream().filter(containsPattern).findAny().orElse(key);
569            }
570            return new Tag(key, p.get(key));
571        }
572
573        @Override
574        public String toString() {
575            return '[' + (negateResult ? "!" : "") + label + ']';
576        }
577    }
578
579    /**
580     * Class condition.
581     */
582    public static class ClassCondition implements Condition {
583
584        /** Class identifier */
585        public final String id;
586        final boolean not;
587
588        /**
589         * Constructs a new {@code ClassCondition}.
590         * @param id id
591         * @param not negation or not
592         */
593        public ClassCondition(String id, boolean not) {
594            this.id = id;
595            this.not = not;
596        }
597
598        @Override
599        public boolean applies(Environment env) {
600            Cascade cascade = env.getCascade(env.layer);
601            return cascade != null && (not ^ cascade.containsKey(id));
602        }
603
604        @Override
605        public String toString() {
606            return (not ? "!" : "") + '.' + id;
607        }
608    }
609
610    /**
611     * Like <a href="http://www.w3.org/TR/css3-selectors/#pseudo-classes">CSS pseudo classes</a>, MapCSS pseudo classes
612     * are written in lower case with dashes between words.
613     */
614    public static final class PseudoClasses {
615
616        private PseudoClasses() {
617            // Hide default constructor for utilities classes
618        }
619
620        /**
621         * {@code closed} tests whether the way is closed or the relation is a closed multipolygon
622         * @param e MapCSS environment
623         * @return {@code true} if the way is closed or the relation is a closed multipolygon
624         */
625        static boolean closed(Environment e) { // NO_UCD (unused code)
626            if (e.osm instanceof Way && ((Way) e.osm).isClosed())
627                return true;
628            return e.osm instanceof Relation && ((Relation) e.osm).isMultipolygon();
629        }
630
631        /**
632         * {@code :modified} tests whether the object has been modified.
633         * @param e MapCSS environment
634         * @return {@code true} if the object has been modified
635         * @see IPrimitive#isModified()
636         */
637        static boolean modified(Environment e) { // NO_UCD (unused code)
638            return e.osm.isModified() || e.osm.isNewOrUndeleted();
639        }
640
641        /**
642         * {@code ;new} tests whether the object is new.
643         * @param e MapCSS environment
644         * @return {@code true} if the object is new
645         * @see IPrimitive#isNew()
646         */
647        static boolean _new(Environment e) { // NO_UCD (unused code)
648            return e.osm.isNew();
649        }
650
651        /**
652         * {@code :connection} tests whether the object is a connection node.
653         * @param e MapCSS environment
654         * @return {@code true} if the object is a connection node
655         * @see Node#isConnectionNode()
656         */
657        static boolean connection(Environment e) { // NO_UCD (unused code)
658            return e.osm instanceof Node && e.osm.getDataSet() != null && ((Node) e.osm).isConnectionNode();
659        }
660
661        /**
662         * {@code :tagged} tests whether the object is tagged.
663         * @param e MapCSS environment
664         * @return {@code true} if the object is tagged
665         * @see IPrimitive#isTagged()
666         */
667        static boolean tagged(Environment e) { // NO_UCD (unused code)
668            return e.osm.isTagged();
669        }
670
671        /**
672         * {@code :same-tags} tests whether the object has the same tags as its child/parent.
673         * @param e MapCSS environment
674         * @return {@code true} if the object has the same tags as its child/parent
675         * @see IPrimitive#hasSameInterestingTags(IPrimitive)
676         */
677        static boolean sameTags(Environment e) { // NO_UCD (unused code)
678            return e.osm.hasSameInterestingTags(Utils.firstNonNull(e.child, e.parent));
679        }
680
681        /**
682         * {@code :area-style} tests whether the object has an area style. This is useful for validators.
683         * @param e MapCSS environment
684         * @return {@code true} if the object has an area style
685         * @see ElemStyles#hasAreaElemStyle(IPrimitive, boolean)
686         */
687        static boolean areaStyle(Environment e) { // NO_UCD (unused code)
688            // only for validator
689            return ElemStyles.hasAreaElemStyle(e.osm, false);
690        }
691
692        /**
693         * {@code unconnected}: tests whether the object is a unconnected node.
694         * @param e MapCSS environment
695         * @return {@code true} if the object is a unconnected node
696         */
697        static boolean unconnected(Environment e) { // NO_UCD (unused code)
698            return e.osm instanceof Node && ((Node) e.osm).getParentWays().isEmpty();
699        }
700
701        /**
702         * {@code righthandtraffic} checks if there is right-hand traffic at the current location.
703         * @param e MapCSS environment
704         * @return {@code true} if there is right-hand traffic at the current location
705         * @see ExpressionFactory.Functions#is_right_hand_traffic(Environment)
706         */
707        static boolean righthandtraffic(Environment e) { // NO_UCD (unused code)
708            return ExpressionFactory.Functions.is_right_hand_traffic(e);
709        }
710
711        /**
712         * {@code clockwise} whether the way is closed and oriented clockwise,
713         * or non-closed and the 1st, 2nd and last node are in clockwise order.
714         * @param e MapCSS environment
715         * @return {@code true} if the way clockwise
716         * @see ExpressionFactory.Functions#is_clockwise(Environment)
717         */
718        static boolean clockwise(Environment e) { // NO_UCD (unused code)
719            return ExpressionFactory.Functions.is_clockwise(e);
720        }
721
722        /**
723         * {@code anticlockwise} whether the way is closed and oriented anticlockwise,
724         * or non-closed and the 1st, 2nd and last node are in anticlockwise order.
725         * @param e MapCSS environment
726         * @return {@code true} if the way clockwise
727         * @see ExpressionFactory.Functions#is_anticlockwise(Environment)
728         */
729        static boolean anticlockwise(Environment e) { // NO_UCD (unused code)
730            return ExpressionFactory.Functions.is_anticlockwise(e);
731        }
732
733        /**
734         * {@code unclosed-multipolygon} tests whether the object is an unclosed multipolygon.
735         * @param e MapCSS environment
736         * @return {@code true} if the object is an unclosed multipolygon
737         */
738        static boolean unclosed_multipolygon(Environment e) { // NO_UCD (unused code)
739            return e.osm instanceof Relation && ((Relation) e.osm).isMultipolygon() &&
740                    !e.osm.isIncomplete() && !((Relation) e.osm).hasIncompleteMembers() &&
741                    !MultipolygonCache.getInstance().get((Relation) e.osm).getOpenEnds().isEmpty();
742        }
743
744        private static final Predicate<OsmPrimitive> IN_DOWNLOADED_AREA = new InDataSourceArea(false);
745
746        /**
747         * {@code in-downloaded-area} tests whether the object is within source area ("downloaded area").
748         * @param e MapCSS environment
749         * @return {@code true} if the object is within source area ("downloaded area")
750         * @see InDataSourceArea
751         */
752        static boolean inDownloadedArea(Environment e) { // NO_UCD (unused code)
753            return e.osm instanceof OsmPrimitive && IN_DOWNLOADED_AREA.test((OsmPrimitive) e.osm);
754        }
755
756        static boolean completely_downloaded(Environment e) { // NO_UCD (unused code)
757            if (e.osm instanceof Relation) {
758                return !((Relation) e.osm).hasIncompleteMembers();
759            } else {
760                return true;
761            }
762        }
763
764        static boolean closed2(Environment e) { // NO_UCD (unused code)
765            if (e.osm instanceof Way && ((Way) e.osm).isClosed())
766                return true;
767            if (e.osm instanceof Relation && ((Relation) e.osm).isMultipolygon()) {
768                Multipolygon multipolygon = MultipolygonCache.getInstance().get((Relation) e.osm);
769                return multipolygon != null && multipolygon.getOpenEnds().isEmpty();
770            }
771            return false;
772        }
773
774        static boolean selected(Environment e) { // NO_UCD (unused code)
775            if (e.mc != null) {
776                e.mc.getCascade(e.layer).setDefaultSelectedHandling(false);
777            }
778            return e.osm.isSelected();
779        }
780    }
781
782    /**
783     * Pseudo class condition.
784     */
785    public static class PseudoClassCondition implements Condition {
786
787        final Method method;
788        final boolean not;
789
790        protected PseudoClassCondition(Method method, boolean not) {
791            this.method = method;
792            this.not = not;
793        }
794
795        /**
796         * Create a new pseudo class condition
797         * @param id The id of the pseudo class
798         * @param not <code>true</code> to invert the condition
799         * @param context The context the class is found in.
800         * @return The new condition
801         */
802        public static PseudoClassCondition createPseudoClassCondition(String id, boolean not, Context context) {
803            CheckParameterUtil.ensureThat(!"sameTags".equals(id) || Context.LINK.equals(context), "sameTags only supported in LINK context");
804            if ("open_end".equals(id)) {
805                return new OpenEndPseudoClassCondition(not);
806            }
807            final Method method = getMethod(id);
808            if (method != null) {
809                return new PseudoClassCondition(method, not);
810            }
811            throw new MapCSSException("Invalid pseudo class specified: " + id);
812        }
813
814        protected static Method getMethod(String id) {
815            String cleanId = id.replaceAll("-|_", "");
816            for (Method method : PseudoClasses.class.getDeclaredMethods()) {
817                // for backwards compatibility, consider :sameTags == :same-tags == :same_tags (#11150)
818                final String methodName = method.getName().replaceAll("-|_", "");
819                if (methodName.equalsIgnoreCase(cleanId)) {
820                    return method;
821                }
822            }
823            return null;
824        }
825
826        @Override
827        public boolean applies(Environment e) {
828            try {
829                return not ^ (Boolean) method.invoke(null, e);
830            } catch (ReflectiveOperationException ex) {
831                throw new JosmRuntimeException(ex);
832            }
833        }
834
835        @Override
836        public String toString() {
837            return (not ? "!" : "") + ':' + method.getName();
838        }
839    }
840
841    /**
842     * Open end pseudo class condition.
843     */
844    public static class OpenEndPseudoClassCondition extends PseudoClassCondition {
845        /**
846         * Constructs a new {@code OpenEndPseudoClassCondition}.
847         * @param not negation or not
848         */
849        public OpenEndPseudoClassCondition(boolean not) {
850            super(null, not);
851        }
852
853        @Override
854        public boolean applies(Environment e) {
855            return true;
856        }
857    }
858
859    /**
860     * A condition that is fulfilled whenever the expression is evaluated to be true.
861     */
862    public static class ExpressionCondition implements Condition {
863
864        final Expression e;
865
866        /**
867         * Constructs a new {@code ExpressionFactory}
868         * @param e expression
869         */
870        public ExpressionCondition(Expression e) {
871            this.e = e;
872        }
873
874        @Override
875        public boolean applies(Environment env) {
876            Boolean b = Cascade.convertTo(e.evaluate(env), Boolean.class);
877            return b != null && b;
878        }
879
880        @Override
881        public String toString() {
882            return '[' + e.toString() + ']';
883        }
884    }
885}