add two facts: java_libjvm_path java_default_home

* dirname containing base directory of java
* e.g. java binary is `${::java_default_home}/jre/bin/java`

* dirname containing `libjvm.so`
* Most people will use this for LD_LIBRARY_PATH

lib/facter/java_default_home.rb

@@ -0,0 +1,21 @@
+# Fact: java_default_home
+#
+# Purpose: get absolute path of java system home
+#
+# Resolution:
+#   Uses `readlink` to resolve the path of `/usr/bin/java` then returns subsubdir
+#
+# Caveats:
+#   Requires readlink
+#
+# Notes:
+#   None
+Facter.add(:java_default_home) do
+  confine :kernel => 'Linux'
+  setcode do
+    if Facter::Util::Resolution.which('readlink')
+      java_bin = Facter::Util::Resolution.exec('readlink -e /usr/bin/java').strip
+      java_default_home = File.dirname(File.dirname(File.dirname(java_bin)))
+    end
+  end
+end

lib/facter/java_libjvm_path.rb

@@ -0,0 +1,25 @@
+# Fact: java_libjvm_path
+#
+# Purpose: get path to libjvm.so
+#
+# Resolution:
+#   Lists file in java default home and searches for the file
+#
+# Caveats:
+#   Needs to list files recursively. Returns the first match
+#
+# Notes:
+#   None
+Facter.add(:java_libjvm_path) do
+  confine :kernel => "Linux"
+  setcode do
+    java_default_home = Facter.value(:java_default_home)
+    java_libjvm_file = Dir.glob("#{java_default_home}/jre/lib/**/libjvm.so")
+    if java_libjvm_file.nil? || java_libjvm_file.empty?
+      nil
+    else
+      File.dirname(java_libjvm_file[0])
+    end
+  end
+end
+