1 files changed, 147 insertions, 0 deletions
diff --git a/reportbuilder/java/org/libreoffice/report/pentaho/DefaultNameGenerator.java b/reportbuilder/java/org/libreoffice/report/pentaho/DefaultNameGenerator.java
new file mode 100644
index 000000000..46f2a032a
--- /dev/null
+++ b/reportbuilder/java/org/libreoffice/report/pentaho/DefaultNameGenerator.java
@@ -0,0 +1,147 @@
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+package org.libreoffice.report.pentaho;
+
+import org.libreoffice.report.OutputRepository;
+
+import java.io.IOException;
+
+
+public class DefaultNameGenerator
+{
+
+    private final OutputRepository outputRepository;
+
+    public DefaultNameGenerator(final OutputRepository outputRepository)
+    {
+        if (outputRepository == null)
+        {
+            throw new NullPointerException();
+        }
+        this.outputRepository = outputRepository;
+    }
+
+    public String generateName(final String namePrefix, final String mimeType)
+            throws IOException
+    {
+        return generateName(namePrefix, mimeType, true);
+    }
+
+    public String generateStorageName(final String namePrefix, final String mimeType)
+            throws IOException
+    {
+        return generateName(namePrefix, mimeType, false);
+    }
+
+    /**
+     * Generates a new, unique name for storing resources in the output repository. Assuming that proper synchronization
+     * has been applied, the generated name will be unique within that repository.
+     *
+     * @param namePrefix a user defined name for that resource.
+     * @param mimeType   the mime type of the resource to be stored in the repository.
+     * @param isStream
+     * @return the generated, fully qualified name.
+     * @throws java.io.IOException
+     */
+    private String generateName(final String namePrefix, final String mimeType, final boolean isStream)
+            throws IOException
+    {
+        final String name;
+        if (namePrefix != null)
+        {
+            name = namePrefix;
+        }
+        else
+        {
+            name = "file";
+        }
+
+        StringBuffer firstFileName = new StringBuffer();
+        firstFileName.append(name);
+        final String suffix;
+        if (mimeType != null)
+        {
+            suffix = getSuffixForType(mimeType);
+            firstFileName.append('.');
+            firstFileName.append(suffix);
+        }
+        else
+        {
+            suffix = null;
+        }
+        String newName = firstFileName.toString();
+        boolean exists;
+        if (isStream)
+        {
+            exists = outputRepository.exists(newName);
+        }
+        else
+        {
+            exists = outputRepository.existsStorage(newName);
+        }
+        if (exists)
+        {
+            int counter = 0;
+            while (exists)
+            {
+                if (counter < 0) // wraparound should not happen...
+                {
+                    throw new IOException();
+                }
+                firstFileName.delete(0, firstFileName.length());
+                firstFileName.append(name);
+                firstFileName.append(counter);
+                if (suffix != null)
+                {
+                    firstFileName.append('.');
+                    firstFileName.append(suffix);
+                }
+                newName = firstFileName.toString();
+                if (isStream)
+                {
+                    exists = outputRepository.exists(newName);
+                }
+                else
+                {
+                    exists = outputRepository.existsStorage(newName);
+                }
+                counter++;
+            }
+        }
+        return newName;
+    }
+
+    private String getSuffixForType(final String mimeType)
+    {
+        if ("image/png".equals(mimeType))
+        {
+            return "png";
+        }
+        if ("image/jpeg".equals(mimeType))
+        {
+            return "jpg";
+        }
+        if ("image/gif".equals(mimeType))
+        {
+            return "gif";
+        }
+
+        // todo ... use a flexible mapping ...
+        return "dat";
+    }
+}