1 files changed, 74 insertions, 0 deletions
diff --git a/src/main/java/com/networknt/schema/PatternValidator.java b/src/main/java/com/networknt/schema/PatternValidator.java
new file mode 100644
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--- /dev/null
+++ b/src/main/java/com/networknt/schema/PatternValidator.java
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+/*
+ * Copyright (c) 2016 Network New Technologies Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.networknt.schema;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.networknt.schema.regex.RegularExpression;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Collections;
+import java.util.Optional;
+import java.util.Set;
+
+public class PatternValidator extends BaseJsonValidator {
+    private static final Logger logger = LoggerFactory.getLogger(PatternValidator.class);
+    private String pattern;
+    private RegularExpression compiledPattern;
+
+    public PatternValidator(SchemaLocation schemaLocation, JsonNodePath evaluationPath, JsonNode schemaNode, JsonSchema parentSchema, ValidationContext validationContext) {
+        super(schemaLocation, evaluationPath, schemaNode, parentSchema, ValidatorTypeCode.PATTERN, validationContext);
+
+        this.pattern = Optional.ofNullable(schemaNode).filter(JsonNode::isTextual).map(JsonNode::textValue).orElse(null);
+        try {
+            this.compiledPattern = RegularExpression.compile(this.pattern, validationContext);
+        } catch (RuntimeException e) {
+            e.setStackTrace(new StackTraceElement[0]);
+            logger.error("Failed to compile pattern '{}': {}", this.pattern, e.getMessage());
+            throw e;
+        }
+    }
+
+    private boolean matches(String value) {
+        return this.compiledPattern.matches(value);
+    }
+
+    @Override
+    public Set<ValidationMessage> validate(ExecutionContext executionContext, JsonNode node, JsonNode rootNode, JsonNodePath instanceLocation) {
+        debug(logger, node, rootNode, instanceLocation);
+
+        JsonType nodeType = TypeFactory.getValueNodeType(node, this.validationContext.getConfig());
+        if (nodeType != JsonType.STRING) {
+            return Collections.emptySet();
+        }
+
+        try {
+            if (!matches(node.asText())) {
+                return Collections.singleton(message().instanceNode(node).instanceLocation(instanceLocation)
+                        .locale(executionContext.getExecutionConfig().getLocale())
+                        .failFast(executionContext.isFailFast()).arguments(this.pattern).build());
+            }
+        } catch (JsonSchemaException e) {
+            throw e;
+        } catch (RuntimeException e) {
+            logger.error("Failed to apply pattern '{}' at {}: {}", this.pattern, instanceLocation, e.getMessage());
+            throw e;
+        }
+
+        return Collections.emptySet();
+    }
+}