Add Constant#defined to allow #ifdef style logic.

Rakefile

@@ -74,6 +74,7 @@ def gen_platform_constants(name, pkg, file_name, options = {})
     end
     f.puts "public final int intValue() { return (int) value; }"
     f.puts "public final long longValue() { return value; }"
+    f.puts "public final boolean defined() { return true; }"
     f.puts "}"
   end
 end
@@ -101,6 +102,7 @@ def gen_fake_constants(name, pkg, file_name, options = {})
     f.puts "public static final long MAX_VALUE = #{max_value}L;"
     f.puts "public final int intValue() { return (int) value; }"
     f.puts "public final long longValue() { return value; }"
+    f.puts "public final boolean defined() { return true; }"
     f.puts "}"
   end
 end
@@ -129,6 +131,7 @@ def gen_xplatform_constants(name, pkg, file_name, options = {})
     f.puts "public final int intValue() { return (int) resolver.longValue(this); }"
     f.puts "public final long longValue() { return resolver.longValue(this); }"
     f.puts "public final String description() { return resolver.description(this); }"
+    f.puts "public final boolean defined() { return resolver.defined(this); }"
     f.puts "public final String toString() { return description(); }"
     f.puts "public static #{name} valueOf(long value) { "
     f.puts "    return resolver.valueOf(value);"

src/main/java/com/kenai/constantine/ConstantSet.java

@@ -161,6 +161,10 @@ public String name() {
             return constant.name();
         }
 
+        public boolean defined() {
+            return true;
+        }
+
         public int hashCode() {
             return constant.hashCode();
         }

src/main/java/com/kenai/constantine/platform/AddressFamily.java

@@ -52,6 +52,7 @@ public enum AddressFamily implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static AddressFamily valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/ConstantResolver.java

@@ -91,6 +91,11 @@ public long longValue() {
         public String name() {
             return name;
         }
+
+        public boolean defined() {
+            return false;
+        }
+
         @Override
         public String toString() {
             return name;

src/main/java/com/kenai/constantine/platform/Errno.java

@@ -95,6 +95,7 @@ public enum Errno implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static Errno valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/Fcntl.java

@@ -42,6 +42,7 @@ public enum Fcntl implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static Fcntl valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/INAddr.java

@@ -18,6 +18,7 @@ public enum INAddr implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static INAddr valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/IPProto.java

@@ -38,6 +38,7 @@ public enum IPProto implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static IPProto valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/NameInfo.java

@@ -18,6 +18,7 @@ public enum NameInfo implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static NameInfo valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/OpenFlags.java

@@ -30,6 +30,7 @@ public enum OpenFlags implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static OpenFlags valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/PRIO.java

@@ -15,6 +15,7 @@ public enum PRIO implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static PRIO valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/ProtocolFamily.java

@@ -49,6 +49,7 @@ public enum ProtocolFamily implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static ProtocolFamily valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/RLIM.java

@@ -14,6 +14,7 @@ public enum RLIM implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static RLIM valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/RLIMIT.java

@@ -28,6 +28,7 @@ public enum RLIMIT implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static RLIMIT valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/Shutdown.java

@@ -13,6 +13,7 @@ public enum Shutdown implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static Shutdown valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/Signal.java

@@ -48,6 +48,7 @@ public enum Signal implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static Signal valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/Sock.java

@@ -16,6 +16,7 @@ public enum Sock implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static Sock valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/SocketLevel.java

@@ -14,6 +14,7 @@ public enum SocketLevel implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static SocketLevel valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/SocketOption.java

@@ -52,6 +52,7 @@ public enum SocketOption implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static SocketOption valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/Sysconf.java

@@ -138,6 +138,7 @@ public enum Sysconf implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static Sysconf valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/TCP.java

@@ -26,6 +26,7 @@ public enum TCP implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static TCP valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/com/kenai/constantine/platform/WaitFlags.java

@@ -16,6 +16,7 @@ public enum WaitFlags implements com.kenai.constantine.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return true; }
 public final String toString() { return description(); }
 public final static WaitFlags valueOf(int value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/Constant.java

@@ -27,4 +27,5 @@ public interface Constant {
     int intValue();
     long longValue();
     String name();
+    boolean defined();
 }

src/main/java/jnr/constants/platform/AddressFamily.java

@@ -50,6 +50,7 @@ public enum AddressFamily implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static AddressFamily valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/ConstantResolver.java

@@ -91,6 +91,10 @@ public final String name() {
             return name;
         }
 
+        public final boolean defined() {
+            return false;
+        }
+
         @Override
         public final String toString() {
             return name;
@@ -176,6 +180,11 @@ final String description(E e) {
     }
 
 
+    final boolean defined(E e) {
+        return getConstant(e).defined();
+    }
+
+
     @SuppressWarnings("unchecked")
     final E valueOf(long value) {
         E e;

src/main/java/jnr/constants/platform/Errno.java

@@ -93,6 +93,7 @@ public enum Errno implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static Errno valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/Fcntl.java

@@ -40,6 +40,7 @@ public enum Fcntl implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static Fcntl valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/INAddr.java

@@ -16,6 +16,7 @@ public enum INAddr implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static INAddr valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/IPProto.java

@@ -36,6 +36,7 @@ public enum IPProto implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static IPProto valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/NameInfo.java

@@ -16,6 +16,7 @@ public enum NameInfo implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static NameInfo valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/OpenFlags.java

@@ -28,6 +28,7 @@ public enum OpenFlags implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static OpenFlags valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/PRIO.java

@@ -13,6 +13,7 @@ public enum PRIO implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static PRIO valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/ProtocolFamily.java

@@ -47,6 +47,7 @@ public enum ProtocolFamily implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static ProtocolFamily valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/RLIM.java

@@ -12,6 +12,7 @@ public enum RLIM implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static RLIM valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/RLIMIT.java

@@ -26,6 +26,7 @@ public enum RLIMIT implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static RLIMIT valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/Shutdown.java

@@ -11,6 +11,7 @@ public enum Shutdown implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static Shutdown valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/Signal.java

@@ -46,6 +46,7 @@ public enum Signal implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static Signal valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/Sock.java

@@ -14,6 +14,7 @@ public enum Sock implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static Sock valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/SocketLevel.java

@@ -12,6 +12,7 @@ public enum SocketLevel implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static SocketLevel valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/SocketOption.java

@@ -50,6 +50,7 @@ public enum SocketOption implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static SocketOption valueOf(long value) { 
     return resolver.valueOf(value);

src/main/java/jnr/constants/platform/Sysconf.java

@@ -136,6 +136,7 @@ public enum Sysconf implements jnr.constants.Constant {
 public final int intValue() { return (int) resolver.longValue(this); }
 public final long longValue() { return resolver.longValue(this); }
 public final String description() { return resolver.description(this); }
+public final boolean defined() { return resolver.defined(this); }
 public final String toString() { return description(); }
 public static Sysconf valueOf(long value) { 
     return resolver.valueOf(value);