[GitHub] [pinot] SabrinaZhaozyf commented on a diff in pull request #9501: Add Support for IP Address Function

[GitBox <gi...@apache.org>]

SabrinaZhaozyf commented on code in PR #9501:
URL: https://github.com/apache/pinot/pull/9501#discussion_r1016970805


##########
pinot-common/src/main/java/org/apache/pinot/common/function/scalar/IpAddressFunctions.java:
##########
@@ -0,0 +1,80 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.pinot.common.function.scalar;
+
+import inet.ipaddr.AddressStringException;
+import inet.ipaddr.IPAddress;
+import inet.ipaddr.IPAddressString;
+import inet.ipaddr.PrefixLenException;
+import org.apache.pinot.spi.annotations.ScalarFunction;
+
+
+/**
+ * Inbuilt IP related transform functions
+ *
+ * Functions added:
+ * isSubnetOf(String ipPrefix, String ipAddress) --> boolean
+ *
+ * Functions to add:
+ * ipPrefix(String ipAddress, int prefixBits) -> String ipPrefix
+ * ipSubnetMin(String ipPrefix) -> String ipMin
+ * ipSubnetMax(String ipPrefix) -> String ipMax
+ */
+public class IpAddressFunctions {
+
+  private IpAddressFunctions() {
+  }
+
+  /**
+   * Validates IP prefix prefixStr and returns IPAddress if validated
+   */
+  private static IPAddress getPrefix(String prefixStr) {
+    IPAddress prefixAddr = getAddress(prefixStr);
+    if (!prefixAddr.isPrefixed()) {
+      throw new IllegalArgumentException("IP Address " + prefixStr + " should be prefixed.");
+    }
+    try {
+      return prefixAddr.toPrefixBlock();
+    } catch (PrefixLenException e) {
+      throw e;
+    }
+  }
+
+  /**
+   * Validates IP address ipString and returns IPAddress if validated
+   */
+  private static IPAddress getAddress(String ipString) {
+    try {
+      return new IPAddressString(ipString).toAddress();
+    } catch (AddressStringException e) {
+      throw new IllegalArgumentException("Invalid IP Address format for " + ipString);
+    }
+  }
+
+  @ScalarFunction
+  public static boolean isSubnetOf(String ipPrefix, String ipAddress) {
+    IPAddress prefix = getPrefix(ipPrefix);
+    IPAddress ip = getAddress(ipAddress);
+    if (ip.isPrefixed()) {
+      throw new IllegalArgumentException("IP Address " + ipAddress + " should not be prefixed.");
+    }
+    return prefix.contains(ip);

Review Comment:
   Hi @walterddr , thanks for the comment! Could you please elaborate a bit more?



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