Moving to root below branch label

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@2005 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/filesys/util/IPAddress.java

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+/*
+ * Copyright (C) 2005 Alfresco, Inc.
+ *
+ * Licensed under the Mozilla Public License version 1.1 
+ * with a permitted attribution clause. You may obtain a
+ * copy of the License at
+ *
+ *   http://www.alfresco.org/legal/license.txt
+ *
+ * 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.alfresco.filesys.util;
+
+import java.net.InetAddress;
+import java.util.StringTokenizer;
+
+/**
+ * TCP/IP Address Utility Class
+ */
+public class IPAddress
+{
+
+    /**
+     * Check if the specified address is a valid numeric TCP/IP address
+     * 
+     * @param ipaddr String
+     * @return boolean
+     */
+    public final static boolean isNumericAddress(String ipaddr)
+    {
+
+        // Check if the string is valid
+
+        if (ipaddr == null || ipaddr.length() < 7 || ipaddr.length() > 15)
+            return false;
+
+        // Check the address string, should be n.n.n.n format
+
+        StringTokenizer token = new StringTokenizer(ipaddr, ".");
+        if (token.countTokens() != 4)
+            return false;
+
+        while (token.hasMoreTokens())
+        {
+
+            // Get the current token and convert to an integer value
+
+            String ipNum = token.nextToken();
+
+            try
+            {
+                int ipVal = Integer.valueOf(ipNum).intValue();
+                if (ipVal < 0 || ipVal > 255)
+                    return false;
+            }
+            catch (NumberFormatException ex)
+            {
+                return false;
+            }
+        }
+
+        // Looks like a valid IP address
+
+        return true;
+    }
+
+    /**
+     * Check if the specified address is a valid numeric TCP/IP address and return as an integer
+     * value
+     * 
+     * @param ipaddr String
+     * @return int
+     */
+    public final static int parseNumericAddress(String ipaddr)
+    {
+
+        // Check if the string is valid
+
+        if (ipaddr == null || ipaddr.length() < 7 || ipaddr.length() > 15)
+            return 0;
+
+        // Check the address string, should be n.n.n.n format
+
+        StringTokenizer token = new StringTokenizer(ipaddr, ".");
+        if (token.countTokens() != 4)
+            return 0;
+
+        int ipInt = 0;
+
+        while (token.hasMoreTokens())
+        {
+
+            // Get the current token and convert to an integer value
+
+            String ipNum = token.nextToken();
+
+            try
+            {
+
+                // Validate the current address part
+
+                int ipVal = Integer.valueOf(ipNum).intValue();
+                if (ipVal < 0 || ipVal > 255)
+                    return 0;
+
+                // Add to the integer address
+
+                ipInt = (ipInt << 8) + ipVal;
+            }
+            catch (NumberFormatException ex)
+            {
+                return 0;
+            }
+        }
+
+        // Return the integer address
+
+        return ipInt;
+    }
+
+    /**
+     * Convert an IP address into an integer value
+     * 
+     * @param ipaddr InetAddress
+     * @return int
+     */
+    public final static int asInteger(InetAddress ipaddr)
+    {
+
+        // Get the address as an array of bytes
+
+        byte[] addrBytes = ipaddr.getAddress();
+
+        // Build an integer value from the bytes
+
+        return DataPacker.getInt(addrBytes, 0);
+    }
+
+    /**
+     * Check if the specified address is within the required subnet
+     * 
+     * @param ipaddr String
+     * @param subnet String
+     * @param mask String
+     * @return boolean
+     */
+    public final static boolean isInSubnet(String ipaddr, String subnet, String mask)
+    {
+
+        // Convert the addresses to integer values
+
+        int ipaddrInt = parseNumericAddress(ipaddr);
+        if (ipaddrInt == 0)
+            return false;
+
+        int subnetInt = parseNumericAddress(subnet);
+        if (subnetInt == 0)
+            return false;
+
+        int maskInt = parseNumericAddress(mask);
+        if (maskInt == 0)
+            return false;
+
+        // Check if the address is part of the subnet
+
+        if ((ipaddrInt & maskInt) == subnetInt)
+            return true;
+        return false;
+    }
+
+    /**
+     * Convert a raw IP address array as a String
+     * 
+     * @param ipaddr byte[]
+     * @return String
+     */
+    public final static String asString(byte[] ipaddr)
+    {
+
+        // Check if the address is valid
+
+        if (ipaddr == null || ipaddr.length != 4)
+            return null;
+
+        // Convert the raw IP address to a string
+
+        StringBuffer str = new StringBuffer();
+
+        str.append((int) (ipaddr[0] & 0xFF));
+        str.append(".");
+        str.append((int) (ipaddr[1] & 0xFF));
+        str.append(".");
+        str.append((int) (ipaddr[2] & 0xFF));
+        str.append(".");
+        str.append((int) (ipaddr[3] & 0xFF));
+
+        // Return the address string
+
+        return str.toString();
+    }
+}