1 files changed, 46 insertions, 0 deletions
diff --git a/netconf/restconf/restconf-common/src/main/java/org/opendaylight/restconf/common/validation/RestconfValidationUtils.java b/netconf/restconf/restconf-common/src/main/java/org/opendaylight/restconf/common/validation/RestconfValidationUtils.java
new file mode 100644
index 0000000..987ce42
--- /dev/null
+++ b/netconf/restconf/restconf-common/src/main/java/org/opendaylight/restconf/common/validation/RestconfValidationUtils.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.restconf.common.validation;
+
+import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
+import org.opendaylight.yangtools.yang.common.ErrorTag;
+import org.opendaylight.yangtools.yang.common.ErrorType;
+
+/**
+ * sal-rest-connector
+ * org.opendaylight.controller.md.sal.rest.common
+ *
+ * <p>
+ * Utility class is centralizing all needed validation functionality for a Restconf osgi module.
+ * All methods have to throw {@link RestconfDocumentedException} only, which is a representation
+ * for all error situation followed by restconf-netconf specification.
+ * See also <a href="https://tools.ietf.org/html/draft-bierman-netconf-restconf-02">RESTCONF</a>.
+ */
+public final class RestconfValidationUtils {
+    private RestconfValidationUtils() {
+        // Hidden on purpose
+    }
+
+    /**
+     * Method returns {@link RestconfDocumentedException} if value is NULL or same input value.
+     * {@link ErrorType} is relevant for server application layer
+     * {@link ErrorTag} is 404 data-missing
+     * See also <a href="https://tools.ietf.org/html/draft-bierman-netconf-restconf-02">RESTCONF</a>.
+     *
+     * @param value         - some value from {@link org.opendaylight.yangtools.yang.model.api.Module}
+     * @param moduleName    - name of {@link org.opendaylight.yangtools.yang.model.api.Module}
+     * @return              - T value (same input value)
+     */
+    public static <T> T checkNotNullDocumented(final T value, final String moduleName) {
+        if (value == null) {
+            final String errMsg = "Module " + moduleName + " was not found.";
+            throw new RestconfDocumentedException(errMsg, ErrorType.APPLICATION, ErrorTag.DATA_MISSING);
+        }
+        return value;
+    }
+}