add support for patternProperties keyword

core/pom.xml

@@ -117,6 +117,7 @@
                                         -->
                                         <inculde>**/tests/draft2020-12/minItems.json</inculde>
                                         <inculde>**/tests/draft2020-12/maxItems.json</inculde>
+                                        <inculde>**/tests/draft2020-12/patternProperties.json</inculde>
                                     </includes>
                                 </resource>
                             </resources>

core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/ApplicatorVocabulary.java

@@ -37,6 +37,7 @@ public ApplicatorVocabulary() {
         this.vocab =
             new DefaultVocabulary(
                 URI.create("https://json-schema.org/draft/2020-12/vocab/applicator"),
+                new PatternPropertiesKeywordType(),
                 new PrefixItemsKeywordType(),
                 new ItemsKeywordType()
             );

core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/PatternPropertiesKeywordType.java

@@ -0,0 +1,97 @@
+/*
+ * The MIT License
+ *
+ * Copyright 2023 sebastian.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package io.github.sebastiantoepfer.jsonschema.core.vocab.applicator;
+
+import io.github.sebastiantoepfer.jsonschema.InstanceType;
+import io.github.sebastiantoepfer.jsonschema.JsonSchema;
+import io.github.sebastiantoepfer.jsonschema.JsonSchemas;
+import io.github.sebastiantoepfer.jsonschema.keyword.Applicator;
+import io.github.sebastiantoepfer.jsonschema.keyword.Keyword;
+import io.github.sebastiantoepfer.jsonschema.keyword.KeywordType;
+import jakarta.json.JsonObject;
+import jakarta.json.JsonValue;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+
+final class PatternPropertiesKeywordType implements KeywordType {
+
+    @Override
+    public String name() {
+        return "patternProperties";
+    }
+
+    @Override
+    public Keyword createKeyword(final JsonSchema schema, final JsonValue value) {
+        return new PatternPropertiesKeyword(value.asJsonObject());
+    }
+
+    private class PatternPropertiesKeyword implements Applicator {
+
+        private final Map<Pattern, JsonValue> properties;
+
+        public PatternPropertiesKeyword(final JsonObject schema) {
+            this.properties =
+                schema
+                    .entrySet()
+                    .stream()
+                    .map(e -> Map.entry(Pattern.compile(e.getKey()), e.getValue()))
+                    .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
+        }
+
+        @Override
+        public Collection<KeywordCategory> categories() {
+            return List.of(Keyword.KeywordCategory.APPLICATOR, Keyword.KeywordCategory.ANNOTATION);
+        }
+
+        @Override
+        public boolean hasName(final String name) {
+            return Objects.equals(name(), name);
+        }
+
+        @Override
+        public boolean applyTo(final JsonValue instance) {
+            return !InstanceType.OBJECT.isInstance(instance) || propertiesMatches(instance.asJsonObject());
+        }
+
+        private boolean propertiesMatches(final JsonObject instance) {
+            return instance.entrySet().stream().allMatch(this::propertyMatches);
+        }
+
+        private boolean propertyMatches(final Map.Entry<String, JsonValue> property) {
+            return properties
+                .entrySet()
+                .stream()
+                .filter(e -> e.getKey().matcher(property.getKey()).find())
+                .findFirst()
+                .map(Map.Entry::getValue)
+                .map(JsonSchemas::load)
+                .map(schema -> schema.validator().validate(property.getValue()).isEmpty())
+                .orElse(true);
+        }
+    }
+}

core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/PatternPropertiesKeywordTypeTest.java

@@ -0,0 +1,120 @@
+/*
+ * The MIT License
+ *
+ * Copyright 2023 sebastian.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package io.github.sebastiantoepfer.jsonschema.core.vocab.applicator;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.containsInAnyOrder;
+import static org.hamcrest.Matchers.is;
+
+import io.github.sebastiantoepfer.jsonschema.core.DefaultJsonSchemaFactory;
+import io.github.sebastiantoepfer.jsonschema.keyword.Keyword;
+import jakarta.json.Json;
+import jakarta.json.JsonValue;
+import org.junit.jupiter.api.Test;
+
+class PatternPropertiesKeywordTypeTest {
+
+    @Test
+    void should_know_his_name() {
+        final Keyword keyword = new PatternPropertiesKeywordType()
+            .createKeyword(new DefaultJsonSchemaFactory().create(JsonValue.TRUE), JsonValue.EMPTY_JSON_OBJECT);
+
+        assertThat(keyword.hasName("patternProperties"), is(true));
+        assertThat(keyword.hasName("test"), is(false));
+    }
+
+    @Test
+    void should_be_an_applicator_and_an_annotation() {
+        assertThat(
+            new PatternPropertiesKeywordType()
+                .createKeyword(new DefaultJsonSchemaFactory().create(JsonValue.TRUE), JsonValue.EMPTY_JSON_OBJECT)
+                .categories(),
+            containsInAnyOrder(Keyword.KeywordCategory.APPLICATOR, Keyword.KeywordCategory.ANNOTATION)
+        );
+    }
+
+    @Test
+    void should_be_valid_for_non_object() {
+        assertThat(
+            new PatternPropertiesKeywordType()
+                .createKeyword(new DefaultJsonSchemaFactory().create(JsonValue.TRUE), JsonValue.EMPTY_JSON_OBJECT)
+                .asApplicator()
+                .applyTo(JsonValue.FALSE),
+            is(true)
+        );
+    }
+
+    @Test
+    void should_be_valid_for_empty_object() {
+        assertThat(
+            new PatternPropertiesKeywordType()
+                .createKeyword(new DefaultJsonSchemaFactory().create(JsonValue.TRUE), JsonValue.EMPTY_JSON_OBJECT)
+                .asApplicator()
+                .applyTo(JsonValue.EMPTY_JSON_OBJECT),
+            is(true)
+        );
+    }
+
+    @Test
+    void should_be_valid_if_properties_applies_to_his_schema() {
+        assertThat(
+            new PatternPropertiesKeywordType()
+                .createKeyword(
+                    new DefaultJsonSchemaFactory().create(JsonValue.TRUE),
+                    Json.createObjectBuilder().add("t.st", JsonValue.TRUE).build()
+                )
+                .asApplicator()
+                .applyTo(Json.createObjectBuilder().add("test", 1).build()),
+            is(true)
+        );
+    }
+
+    @Test
+    void should_be_invalid_if_properties_not_applies_to_his_schema() {
+        assertThat(
+            new PatternPropertiesKeywordType()
+                .createKeyword(
+                    new DefaultJsonSchemaFactory().create(JsonValue.TRUE),
+                    Json.createObjectBuilder().add("t.st", JsonValue.FALSE).build()
+                )
+                .asApplicator()
+                .applyTo(Json.createObjectBuilder().add("test", 1).build()),
+            is(false)
+        );
+    }
+
+    @Test
+    void should_be_valid_if_properties_not_covered() {
+        assertThat(
+            new PatternPropertiesKeywordType()
+                .createKeyword(
+                    new DefaultJsonSchemaFactory().create(JsonValue.TRUE),
+                    Json.createObjectBuilder().add("t.st", JsonValue.FALSE).build()
+                )
+                .asApplicator()
+                .applyTo(Json.createObjectBuilder().add("foo", 1).build()),
+            is(true)
+        );
+    }
+}