Beginnings of a Java API. This is under heavy construction.

Signed-off-by: Christoph M. Wintersteiger <cwinter@microsoft.com>

src/api/java/com/Microsoft/Z3/Log.java

@@ -0,0 +1,60 @@
+/**
+ * This file was automatically generated from Log.cs 
+ **/
+
+package com.Microsoft.Z3;
+
+/* using System; */
+
+    /**
+     * Interaction logging for Z3.
+     * <remarks>
+     * Note that this is a global, static log and if multiple Context 
+     * objects are created, it logs the interaction with all of them.
+     * </remarks>
+     **/
+    public final class Log
+    {
+        private  boolean mIsOpen = false;
+
+        /**
+         * Open an interaction log file.
+         * <param name="filename">the name of the file to open</param>
+         * @return True if opening the log file succeeds, false otherwise.
+         **/
+        public  boolean Open(String filename)
+        {
+            mIsOpen = true;
+            return Native.openLog(filename) == 1;
+        }
+
+        /**
+         * Closes the interaction log.
+         **/
+        public  void Close()
+        {
+            mIsOpen = false;
+            Native.closeLog();
+        }
+
+        /**
+         * Appends the user-provided string <paramref name="s"/> to the interaction log.
+         **/
+        public  void Append(String s)
+        {
+            
+
+            if (!mIsOpen)
+                throw new Z3Exception("Log cannot be closed.");
+            Native.appendLog(s);
+        }
+
+        /**
+         * Checks whether the interaction log is opened.
+         * @return True if the interaction log is open, false otherwise.
+         **/
+        public  boolean isOpen()
+        {
+            return mIsOpen;
+        }
+    }