Move to the root the bundles which will be part of v1.4 and v2.2

[lgpl/argeo-commons.git] / org.argeo.eclipse.ui.rcp / src / main / java / org / argeo / eclipse / ui / specific / FileHandler.java

diff --git a/org.argeo.eclipse.ui.rcp/src/main/java/org/argeo/eclipse/ui/specific/FileHandler.java b/org.argeo.eclipse.ui.rcp/src/main/java/org/argeo/eclipse/ui/specific/FileHandler.java
new file mode 100644 (file)
index 0000000..5da4973
--- /dev/null
+++ b/org.argeo.eclipse.ui.rcp/src/main/java/org/argeo/eclipse/ui/specific/FileHandler.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.argeo.eclipse.ui.specific;
+
+import java.awt.Desktop;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import org.apache.commons.io.IOUtils;
+import org.argeo.ArgeoException;
+
+/**
+ * Abstraction that enable to implement runtime environment specific (typically
+ * RCP or RAP) methods while dealing with files in the UI.
+ * 
+ */
+public class FileHandler {
+
+       private FileProvider provider;
+
+       public FileHandler(FileProvider provider) {
+               this.provider = provider;
+       }
+
+       public void openFile(String fileName, String fileId) {
+               String tmpFileName = fileName;
+               String prefix = "", extension = "";
+               if (fileName != null) {
+                       int ind = fileName.lastIndexOf('.');
+                       if (ind > 0) {
+                               prefix = fileName.substring(0, ind);
+                               extension = fileName.substring(ind);
+                       }
+               }
+
+               InputStream is = null;
+               try {
+                       is = provider.getInputStreamFromFileId(fileId);
+                       File file = createTmpFile(prefix, extension, is);
+                       tmpFileName = file.getName();
+                       Desktop desktop = null;
+                       if (Desktop.isDesktopSupported()) {
+                               desktop = Desktop.getDesktop();
+                       }
+                       desktop.open(file);
+               } catch (IOException e) {
+                       // Note : tmpFileName = fileName if the error has been thrown while
+                       // creating the tmpFile.
+                       throw new ArgeoException("Cannot open file " + tmpFileName, e);
+               } finally {
+                       IOUtils.closeQuietly(is);
+               }
+       }
+
+       private File createTmpFile(String prefix, String suffix, InputStream is) {
+               File tmpFile = null;
+               OutputStream os = null;
+               try {
+                       tmpFile = File.createTempFile(prefix, suffix);
+                       os = new FileOutputStream(tmpFile);
+                       IOUtils.copy(is, os);
+               } catch (IOException e) {
+                       throw new ArgeoException("Cannot open file " + prefix + "."
+                                       + suffix, e);
+               } finally {
+                       IOUtils.closeQuietly(os);
+               }
+               return tmpFile;
+       }
+}