1 files changed, 189 insertions, 0 deletions
diff --git a/storage/bdb/test/scr016/TestOpenEmpty.java b/storage/bdb/test/scr016/TestOpenEmpty.java
new file mode 100644
index 00000000000..ae92fd363d9
--- /dev/null
+++ b/storage/bdb/test/scr016/TestOpenEmpty.java
@@ -0,0 +1,189 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1997-2002
+ *	Sleepycat Software.  All rights reserved.
+ *
+ * $Id: TestOpenEmpty.java,v 1.4 2002/08/16 19:35:55 dda Exp $
+ */
+
+package com.sleepycat.test;
+
+import com.sleepycat.db.*;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.InputStreamReader;
+import java.io.IOException;
+import java.io.PrintStream;
+
+public class TestOpenEmpty
+{
+    private static final String FileName = "access.db";
+
+    public TestOpenEmpty()
+    {
+    }
+
+    private static void usage()
+    {
+        System.err.println("usage: TestOpenEmpty\n");
+        System.exit(1);
+    }
+
+    public static void main(String argv[])
+    {
+        try
+        {
+            TestOpenEmpty app = new TestOpenEmpty();
+            app.run();
+        }
+        catch (DbException dbe)
+        {
+            System.err.println("TestOpenEmpty: " + dbe.toString());
+            System.exit(1);
+        }
+        catch (FileNotFoundException fnfe)
+        {
+            System.err.println("TestOpenEmpty: " + fnfe.toString());
+            System.exit(1);
+        }
+        System.exit(0);
+    }
+
+    // Prompts for a line, and keeps prompting until a non blank
+    // line is returned.  Returns null on error.
+    //
+    static public String askForLine(InputStreamReader reader,
+                                    PrintStream out, String prompt)
+    {
+        String result = "";
+        while (result != null && result.length() == 0) {
+            out.print(prompt);
+            out.flush();
+            result = getLine(reader);
+        }
+        return result;
+    }
+
+    // Not terribly efficient, but does the job.
+    // Works for reading a line from stdin or a file.
+    // Returns null on EOF.  If EOF appears in the middle
+    // of a line, returns that line, then null on next call.
+    //
+    static public String getLine(InputStreamReader reader)
+    {
+        StringBuffer b = new StringBuffer();
+        int c;
+        try {
+            while ((c = reader.read()) != -1 && c != '\n') {
+                if (c != '\r')
+                    b.append((char)c);
+            }
+        }
+        catch (IOException ioe) {
+            c = -1;
+        }
+
+        if (c == -1 && b.length() == 0)
+            return null;
+        else
+            return b.toString();
+    }
+
+    public void run()
+         throws DbException, FileNotFoundException
+    {
+        // Remove the previous database.
+        new File(FileName).delete();
+
+        try { (new java.io.FileOutputStream(FileName)).close(); }
+        catch (IOException ioe) { }
+
+        // Create the database object.
+        // There is no environment for this simple example.
+        Db table = new Db(null, 0);
+        table.set_error_stream(System.err);
+        table.set_errpfx("TestOpenEmpty");
+        table.open(null, FileName, null, Db.DB_BTREE, Db.DB_CREATE, 0644);
+
+        //
+        // Insert records into the database, where the key is the user
+        // input and the data is the user input in reverse order.
+        //
+        InputStreamReader reader = new InputStreamReader(System.in);
+
+        for (;;) {
+            String line = askForLine(reader, System.out, "input> ");
+            if (line == null)
+                break;
+
+            String reversed = (new StringBuffer(line)).reverse().toString();
+
+            // See definition of StringDbt below
+            //
+            StringDbt key = new StringDbt(line);
+            StringDbt data = new StringDbt(reversed);
+
+            try
+            {
+                int err;
+                if ((err = table.put(null,
+		    key, data, Db.DB_NOOVERWRITE)) == Db.DB_KEYEXIST) {
+                        System.out.println("Key " + line + " already exists.");
+                }
+            }
+            catch (DbException dbe)
+            {
+                System.out.println(dbe.toString());
+            }
+            System.out.println("");
+        }
+
+        // Acquire an iterator for the table.
+        Dbc iterator;
+        iterator = table.cursor(null, 0);
+
+        // Walk through the table, printing the key/data pairs.
+        // See class StringDbt defined below.
+        //
+        StringDbt key = new StringDbt();
+        StringDbt data = new StringDbt();
+        while (iterator.get(key, data, Db.DB_NEXT) == 0)
+        {
+            System.out.println(key.getString() + " : " + data.getString());
+        }
+        iterator.close();
+        table.close(0);
+    }
+
+    // Here's an example of how you can extend a Dbt in a straightforward
+    // way to allow easy storage/retrieval of strings, or whatever
+    // kind of data you wish.  We've declared it as a static inner
+    // class, but it need not be.
+    //
+    static /*inner*/
+    class StringDbt extends Dbt
+    {
+        StringDbt()
+        {
+            set_flags(Db.DB_DBT_MALLOC); // tell Db to allocate on retrieval
+        }
+
+        StringDbt(String value)
+        {
+            setString(value);
+            set_flags(Db.DB_DBT_MALLOC); // tell Db to allocate on retrieval
+        }
+
+        void setString(String value)
+        {
+            set_data(value.getBytes());
+            set_size(value.length());
+        }
+
+        String getString()
+        {
+            return new String(get_data(), 0, get_size());
+        }
+    }
+}