SMACK-361 Some general code cleanup added some missing hashcode methods and added back some removed public API methods (marked as deprecated).

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/branches/smack_3_3_0@13598 b35dd754-fafc-0310-a699-88a17e54d16e

source/org/jivesoftware/smack/util/Base32Encoder.java

@@ -29,7 +29,7 @@ import java.io.IOException;
  */
 public class Base32Encoder implements StringEncoder {
 
-    private static Base32Encoder instance;
+    private static Base32Encoder instance = new Base32Encoder();
     private static final String ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ2345678";
 
     private Base32Encoder() {
@@ -37,9 +37,6 @@ public class Base32Encoder implements StringEncoder {
     }
 
     public static Base32Encoder getInstance() {
-        if (instance == null) {
-            instance = new Base32Encoder();
-        }
         return instance;
     }
 

source/org/jivesoftware/smack/util/Base64Encoder.java

@@ -20,16 +20,13 @@ package org.jivesoftware.smack.util;
  */
 public class Base64Encoder implements StringEncoder {
 
-    private static Base64Encoder instance;
+    private static Base64Encoder instance = new Base64Encoder();
 
     private Base64Encoder() {
         // Use getInstance()
     }
 
     public static Base64Encoder getInstance() {
-        if (instance == null) {
-            instance = new Base64Encoder();
-        }
         return instance;
     }
 

source/org/jivesoftware/smack/util/StringEncoder.java

@@ -17,8 +17,6 @@
  */
 package org.jivesoftware.smack.util;
 
-// TODO move StringEncoder, Base64Encoder and Base32Encoder to smack.util
-
 public interface StringEncoder {
     /**
      * Encodes an string to another representation
@@ -26,7 +24,7 @@ public interface StringEncoder {
      * @param string
      * @return
      */
-    public String encode(String string);
+    String encode(String string);
     
     /**
      * Decodes an string back to it's initial representation
@@ -34,5 +32,5 @@ public interface StringEncoder {
      * @param string
      * @return
      */
-    public String decode(String string);
+    String decode(String string);
 }

source/org/jivesoftware/smackx/FormField.java

@@ -299,24 +299,23 @@ public class FormField {
         return buf.toString();
     }
 
+    @Override
     public boolean equals(Object obj) {
         if (obj == null)
             return false;
         if (obj == this)
             return true;
-        if (obj.getClass() != getClass())
+        if (!(obj instanceof FormField))
             return false;
 
         FormField other = (FormField) obj;
 
-        String thisXml = toXML();
+        return toXML().equals(other.toXML());
-        String otherXml = other.toXML();
-
-        if (thisXml.equals(otherXml)) {
-            return true;
-        } else {
-            return false;
     }
+
+    @Override
+    public int hashCode() {
+        return toXML().hashCode();
     }
 
     /**
@@ -356,6 +355,7 @@ public class FormField {
             return value;
         }
 
+        @Override
         public String toString() {
             return getLabel();
         }
@@ -375,6 +375,7 @@ public class FormField {
             return buf.toString();
         }
 
+        @Override
         public boolean equals(Object obj) {
             if (obj == null)
                 return false;
@@ -396,5 +397,13 @@ public class FormField {
 
             return true;
         }
+
+        @Override
+        public int hashCode() {
+            int result = 1;
+            result = 37 * result + value.hashCode();
+            result = 37 * result + (label == null ? 0 : label.hashCode());
+            return result;
+        }
     }
 }

source/org/jivesoftware/smackx/NodeInformationProvider.java

@@ -45,7 +45,7 @@ public interface NodeInformationProvider {
      *  
      * @return a list of the Items defined in the node.
      */
-    public abstract List<DiscoverItems.Item> getNodeItems();
+    List<DiscoverItems.Item> getNodeItems();
 
     /**
      * Returns a list of the features defined in the node. For
@@ -55,7 +55,7 @@ public interface NodeInformationProvider {
      *
      * @return a list of the feature strings defined in the node.
      */
-    public abstract List<String> getNodeFeatures();
+    List<String> getNodeFeatures();
 
     /**
      * Returns a list of the indentites defined in the node. For
@@ -64,12 +64,12 @@ public interface NodeInformationProvider {
      *
      * @return a list of the Identities defined in the node.
      */
-    public abstract List<DiscoverInfo.Identity> getNodeIdentities();
+    List<DiscoverInfo.Identity> getNodeIdentities();
 
     /**
      * Returns a list of the packet extensions defined in the node.
      *
      * @return a list of the packet extensions defined in the node.
      */
-    public abstract List<PacketExtension> getNodePacketExtensions();
+    List<PacketExtension> getNodePacketExtensions();
 }

source/org/jivesoftware/smackx/ServiceDiscoveryManager.java

@@ -513,7 +513,7 @@ public class ServiceDiscoveryManager {
 
         // If the node version is known, store the new entry.
         if (nvh != null) {
-            if (EntityCapsManager.verifyDiscvoerInfoVersion(nvh.getVer(), nvh.getHash(), info))
+            if (EntityCapsManager.verifyDiscoverInfoVersion(nvh.getVer(), nvh.getHash(), info))
                 EntityCapsManager.addDiscoverInfoByNode(nvh.getNodeVer(), info);
         }
 

source/org/jivesoftware/smackx/entitycaps/EntityCapsManager.java

@@ -506,7 +506,7 @@ public class EntityCapsManager {
      * @param info
      * @return true if it's valid and should be cache, false if not
      */
-    public static boolean verifyDiscvoerInfoVersion(String ver, String hash, DiscoverInfo info) {
+    public static boolean verifyDiscoverInfoVersion(String ver, String hash, DiscoverInfo info) {
         // step 3.3 check for duplicate identities
         if (info.containsDuplicateIdentities())
             return false;
@@ -583,7 +583,7 @@ public class EntityCapsManager {
         // NAME is not included (in accordance with XEP-0030, the category and
         // type MUST be included.
         SortedSet<DiscoverInfo.Identity> sortedIdentities = new TreeSet<DiscoverInfo.Identity>();
-        ;
+
         for (Iterator<DiscoverInfo.Identity> it = discoverInfo.getIdentities(); it.hasNext();)
             sortedIdentities.add(it.next());
 
@@ -616,7 +616,7 @@ public class EntityCapsManager {
         // only use the data form for calculation is it has a hidden FORM_TYPE
         // field
         // see XEP-0115 5.4 step 3.6
-        if (extendedInfo != null && extendedInfo.hasHiddenFromTypeField()) {
+        if (extendedInfo != null && extendedInfo.hasHiddenFormTypeField()) {
             synchronized (extendedInfo) {
                 // 6. If the service discovery information response includes
                 // XEP-0128 data forms, sort the forms by the FORM_TYPE (i.e.,

source/org/jivesoftware/smackx/entitycaps/cache/EntityCapsPersistentCache.java

@@ -24,15 +24,15 @@ public interface EntityCapsPersistentCache {
      * @param node
      * @param info
      */
-    abstract void addDiscoverInfoByNodePersistent(String node, DiscoverInfo info);
+    void addDiscoverInfoByNodePersistent(String node, DiscoverInfo info);
 
     /**
      * Replay the Caches data into EntityCapsManager
      */
-    abstract void replay() throws IOException;
+    void replay() throws IOException;
 
     /**
      * Empty the Cache
      */
-    abstract void emptyCache();
+    void emptyCache();
 }

source/org/jivesoftware/smackx/entitycaps/provider/CapsExtensionProvider.java

@@ -1,4 +1,4 @@
-/*
+/**
  * Copyright 2009 Jonas Ådahl.
  * Copyright 2011-2013 Florian Schmaus
  *

source/org/jivesoftware/smackx/packet/DataForm.java

@@ -202,7 +202,7 @@ public class DataForm implements PacketExtension {
      *
      * @return
      */
-    public boolean hasHiddenFromTypeField() {
+    public boolean hasHiddenFormTypeField() {
         boolean found = false;
         for (FormField f : fields) {
             if (f.getVariable().equals("FORM_TYPE") && f.getType() != null && f.getType().equals("hidden"))

source/org/jivesoftware/smackx/packet/DiscoverInfo.java

@@ -257,13 +257,25 @@ public class DiscoverInfo extends IQ {
      * attributes.
      * 
      */
-    public static class Identity implements Comparable<Object> {
+    public static class Identity implements Comparable<Identity> {
 
         private String category;
         private String name;
         private String type;
         private String lang; // 'xml:lang;
 
+        /**
+         * Creates a new identity for an XMPP entity.
+         * 
+         * @param category the entity's category.
+         * @param name the entity's name.
+         * @deprecated As per the spec, the type field is mandatory and the 3 argument constructor should be used instead.
+         */
+        public Identity(String category, String name) {
+            this.category = category;
+            this.name = name;
+        }
+        
         /**
          * Creates a new identity for an XMPP entity.
          * 'category' and 'type' are required by 
@@ -274,6 +286,9 @@ public class DiscoverInfo extends IQ {
          * @param type the entity's type (required as per XEP-30).
          */
         public Identity(String category, String name, String type) {
+            if ((category == null) || (type == null))
+                throw new IllegalArgumentException("category and type cannot be null");
+            
             this.category = category;
             this.name = name;
             this.type = type;
@@ -313,6 +328,7 @@ public class DiscoverInfo extends IQ {
          * 'type' attribute refer to <a href="http://www.jabber.org/registrar/disco-categories.html">Jabber::Registrar</a> 
          *
          * @param type the identity's type.
+         * @deprecated As per the spec, this field is mandatory and the 3 argument constructor should be used instead.
          */
         public void setType(String type) {
             this.type = type;
@@ -374,12 +390,15 @@ public class DiscoverInfo extends IQ {
 
             String otherLang = other.lang == null ? "" : other.lang;
             String thisLang = lang == null ? "" : lang;
-
-            if (!other.type.equals(type))
-                return false;
             if (!otherLang.equals(thisLang))
                 return false;
             
+            // This safeguard can be removed once the deprecated constructor is removed.
+            String otherType = other.type == null ? "" : other.type;
+            String thisType = type == null ? "" : type;
+            if (!otherType.equals(thisType))
+                return false;
+
             String otherName = other.name == null ? "" : other.name;
             String thisName = name == null ? "" : other.name;
             if (!thisName.equals(otherName))
@@ -388,22 +407,34 @@ public class DiscoverInfo extends IQ {
             return true;
         }
         
+        @Override
+        public int hashCode() {
+            int result = 1;
+            result = 37 * result + category.hashCode();
+            result = 37 * result + (lang == null ? 0 : lang.hashCode());
+            result = 37 * result + (type == null ? 0 : type.hashCode());
+            result = 37 * result + (name == null ? 0 : name.hashCode());
+            return result;
+        }
+
         /**
-         * Compares and identity with another object. The comparison order is:
+         * Compares this identity with another one. The comparison order is:
          * Category, Type, Lang. If all three are identical the other Identity is considered equal.
          * Name is not used for comparision, as defined by XEP-0115
          * 
          * @param obj
          * @return
          */
-        public int compareTo(Object obj) {
+        public int compareTo(DiscoverInfo.Identity other) {
-
-            DiscoverInfo.Identity other = (DiscoverInfo.Identity) obj;
             String otherLang = other.lang == null ? "" : other.lang;
             String thisLang = lang == null ? "" : lang;
             
+            // This can be removed once the deprecated constructor is removed.
+            String otherType = other.type == null ? "" : other.type;
+            String thisType = type == null ? "" : type;
+
             if (category.equals(other.category)) {
-                if (type.equals(other.type)) {
+                if (thisType.equals(otherType)) {
                     if (thisLang.equals(otherLang)) {
                         // Don't compare on name, XEP-30 says that name SHOULD
                         // be equals for all identities of an entity
@@ -412,7 +443,7 @@ public class DiscoverInfo extends IQ {
                         return thisLang.compareTo(otherLang);
                     }
                 } else {
-                    return type.compareTo(other.type);
+                    return thisType.compareTo(otherType);
                 }
             } else {
                 return category.compareTo(other.category);
@@ -436,6 +467,8 @@ public class DiscoverInfo extends IQ {
          * @param variable the feature's variable.
          */
         public Feature(String variable) {
+            if (variable == null)
+                throw new IllegalArgumentException("variable cannot be null");
             this.variable = variable;
         }
 
@@ -465,5 +498,10 @@ public class DiscoverInfo extends IQ {
             DiscoverInfo.Feature other = (DiscoverInfo.Feature) obj;
             return variable.equals(other.variable);
         }
+
+        @Override
+        public int hashCode() {
+            return 37 * variable.hashCode();
+        }
     }
 }

test/org/jivesoftware/smack/util/ConnectionUtils.java

@@ -6,6 +6,8 @@ import org.jivesoftware.smack.XMPPException;
 
 public class ConnectionUtils {
 
+    private ConnectionUtils() {}
+    
     public static void becomeFriends(Connection con0, Connection con1) throws XMPPException {
         Roster r0 = con0.getRoster();
         Roster r1 = con1.getRoster();