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1 files changed, 161 insertions, 0 deletions

diff --git a/examples/java/src/db/BulkAccessExample.java b/examples/java/src/db/BulkAccessExample.java
new file mode 100644
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+++ b/examples/java/src/db/BulkAccessExample.java
@@ -0,0 +1,161 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1997, 2012 Oracle and/or its affiliates.  All rights reserved.
+ *
+ * $Id$
+ */
+
+package db;
+
+import com.sleepycat.db.*;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.InputStreamReader;
+import java.io.IOException;
+import java.io.PrintStream;
+
+class BulkAccessExample {
+    private static final String FileName = "access.db";
+
+    public BulkAccessExample() {
+    }
+
+    public static void main(String[] argv) {
+        try {
+            BulkAccessExample app = new BulkAccessExample();
+            app.run();
+        } catch (DatabaseException dbe) {
+            System.err.println("BulkAccessExample: " + dbe.toString());
+            System.exit(1);
+        } catch (FileNotFoundException fnfe) {
+            System.err.println("BulkAccessExample: " + 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.
+    //
+    public static 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.
+    //
+    public static 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 DatabaseException, FileNotFoundException {
+        // Remove the previous database.
+        new File(FileName).delete();
+
+        // Create the database object.
+        // There is no environment for this simple example.
+        DatabaseConfig config = new DatabaseConfig();
+        config.setErrorStream(System.err);
+        config.setErrorPrefix("BulkAccessExample");
+        config.setType(DatabaseType.BTREE);
+        config.setAllowCreate(true);
+        config.setMode(0644);
+        Database table = new Database(FileName, null, config);
+
+        //
+        // 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 || (line.compareToIgnoreCase("end") == 0))
+                break;
+
+            String reversed = (new StringBuffer(line)).reverse().toString();
+
+            // See definition of StringEntry below
+            //
+            StringEntry key = new StringEntry(line);
+            StringEntry data = new StringEntry(reversed);
+
+            try {
+                if (table.putNoOverwrite(null, key, data) == OperationStatus.KEYEXIST)
+                    System.out.println("Key " + line + " already exists.");
+            } catch (DatabaseException dbe) {
+                System.out.println(dbe.toString());
+            }
+            System.out.println("");
+        }
+
+        // Acquire a cursor for the table.
+        Cursor cursor = table.openCursor(null, null);
+        DatabaseEntry foo = new DatabaseEntry();
+
+        MultipleKeyDataEntry bulk_data = new MultipleKeyDataEntry();
+        bulk_data.setData(new byte[1024 * 1024]);
+        bulk_data.setUserBuffer(1024 * 1024, true);
+
+        // Walk through the table, printing the key/data pairs.
+        //
+        while (cursor.getNext(foo, bulk_data, null) == OperationStatus.SUCCESS) {
+            StringEntry key, data;
+            key = new StringEntry();
+            data = new StringEntry();
+
+            while (bulk_data.next(key, data))
+                System.out.println(key.getString() + " : " + data.getString());
+        }
+        cursor.close();
+        table.close();
+    }
+
+    // Here's an example of how you can extend DatabaseEntry 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 class StringEntry extends DatabaseEntry {
+        StringEntry() {
+        }
+
+        StringEntry(String value) {
+            setString(value);
+        }
+
+        void setString(String value) {
+            byte[] data = value.getBytes();
+            setData(data);
+            setSize(data.length);
+        }
+
+        String getString() {
+            return new String(getData(), getOffset(), getSize());
+        }
+    }
+}