PROX-461: Add IpGenerator (#34)

build_utils

@@ -1 +1 @@
-Subproject commit 34f432a1e8e0adedbba23ecd29c1eb2412a8d416
+Subproject commit f42e059d9ec93826ba4ad23232eed8ce67bd5486

pom.xml

@@ -13,7 +13,7 @@
     </parent>
 
     <artifactId>adapter-common-lib</artifactId>
-    <version>0.0.27</version>
+    <version>0.0.28</version>
     <packaging>jar</packaging>
 
     <name>adapter-common-lib</name>

src/main/java/com/rbkmoney/adapter/common/utils/generator/IpGenerator.java

@@ -0,0 +1,35 @@
+package com.rbkmoney.adapter.common.utils.generator;
+
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.util.StringUtils;
+
+import java.net.Inet6Address;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+
+@Slf4j
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public final class IpGenerator {
+
+    public static final String DEFAULT_IP_ADDRESS = "127.0.0.1";
+
+    public static String checkAndGenerate(String ip) {
+        return checkAndGenerate(ip, DEFAULT_IP_ADDRESS);
+    }
+
+    public static String checkAndGenerate(String ip, String defaultIpAddress) {
+        try {
+            InetAddress address = InetAddress.getByName(ip);
+            if (StringUtils.isEmpty(ip) || address instanceof Inet6Address) {
+                return defaultIpAddress;
+            }
+        } catch (UnknownHostException e) {
+            log.error("Error when convert ipAddress: {}", ip, e);
+            return defaultIpAddress;
+        }
+        return ip;
+    }
+
+}

src/test/java/com/rbkmoney/adapter/common/utils/generator/IpGeneratorTest.java

@@ -0,0 +1,26 @@
+package com.rbkmoney.adapter.common.utils.generator;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public final class IpGeneratorTest {
+
+    public static final String IP_V4 = "123.0.0.2";
+
+    @Test
+    public void checkAndGenerate() {
+        String expectedIp = "127.0.0.1";
+        String resultIp = IpGenerator.checkAndGenerate("2001:0db8:85a3:0000:0000:8a2e:0370:7334");
+        Assert.assertEquals(expectedIp, resultIp);
+
+        resultIp = IpGenerator.checkAndGenerate("");
+        Assert.assertEquals(expectedIp, resultIp);
+
+        resultIp = IpGenerator.checkAndGenerate(null);
+        Assert.assertEquals(expectedIp, resultIp);
+
+        resultIp = IpGenerator.checkAndGenerate(IP_V4);
+        Assert.assertEquals(IP_V4, resultIp);
+    }
+
+}