1 files changed, 44 insertions, 0 deletions
diff --git a/verigraph/src/it/polito/verigraph/validation/DpiValidator.java b/verigraph/src/it/polito/verigraph/validation/DpiValidator.java
new file mode 100644
index 0000000..f3c1dfc
--- /dev/null
+++ b/verigraph/src/it/polito/verigraph/validation/DpiValidator.java
@@ -0,0 +1,44 @@
+/*******************************************************************************
+ * Copyright (c) 2017 Politecnico di Torino and others.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Apache License, Version 2.0
+ * which accompanies this distribution, and is available at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *******************************************************************************/
+package it.polito.verigraph.validation;
+
+import com.fasterxml.jackson.databind.JsonNode;
+
+import it.polito.verigraph.model.Configuration;
+import it.polito.verigraph.model.Graph;
+import it.polito.verigraph.model.Node;
+import it.polito.verigraph.validation.exception.ValidationException;
+
+public class DpiValidator implements ValidationInterface {
+
+    public DpiValidator(){
+
+    }
+
+    private void validateKey(String key) throws ValidationException {
+        if (!key.matches("\\w+"))
+            throw new ValidationException("'" + key + "' is not a valid configuration string for a 'dpi'");
+    }
+
+    @Override
+    public void validate(Graph graph, Node node, Configuration configuration) throws ValidationException {
+
+        JsonNode conf = configuration.getConfiguration();
+
+        if (!conf.isArray()) {
+            throw new ValidationException("Configuration of a 'dpi' must be an array");
+        }
+        for (JsonNode key : conf) {
+            if (!key.isTextual())
+                throw new ValidationException("Configuration of a 'dpi' must be an array of strings");
+            validateKey(key.asText());
+        }
+    }
+
+}
+\ No newline at end of file