Prelimary stuff for REST error reporting

Change-Id: Ie562498d0a9394c3e839ceb463e9beab9e1ecff2
diff --git a/src/main/java/net/onrc/onos/api/rest/RestError.java b/src/main/java/net/onrc/onos/api/rest/RestError.java
new file mode 100644
index 0000000..8b958de
--- /dev/null
+++ b/src/main/java/net/onrc/onos/api/rest/RestError.java
@@ -0,0 +1,60 @@
+package net.onrc.onos.api.rest;
+
+/**
+ * Describes a REST error.
+ * code is a unique identifier for the error.
+ * summary is indended to be a short description of what happened.
+ * description is a long description of the problem, and can be formatted using
+ * variable replacement.  Variable placeholders are indicated with the string
+ * "{}" in the description.
+ * Objects of this class are immutable.
+ */
+
+public final class RestError {
+
+    private final RestErrorCodes.RestErrorCode code;
+    private final String summary;
+    private final String description;
+
+    /**
+     * Constructs a new RestError object from a code, summary and description.
+     *
+     * @param newCode code for the new error
+     * @param newSummary short summary for the new error
+     * @param newDescription formatable description for the new error
+     */
+    public RestError(final RestErrorCodes.RestErrorCode newCode,
+                     final String newSummary,
+                     final String newDescription) {
+        code = newCode;
+        summary = newSummary;
+        description = newDescription;
+    }
+
+    /**
+     * Gets the summary of the error.
+     *
+     * @return string for the summary
+     */
+    public String getSummary() {
+        return summary;
+    }
+
+    /**
+     * Gets the unique code for this error.
+     *
+     * @return unique code
+     */
+    public RestErrorCodes.RestErrorCode getCode() {
+        return code;
+    }
+
+    /**
+     * Gets the unformatted description string for the error.
+     *
+     * @return the unformatted description string.
+     */
+    public String getDescription() {
+        return description;
+    }
+}