X-Git-Url: http://git.argeo.org/?a=blobdiff_plain;f=org.argeo.eclipse.ui.rcp%2Fsrc%2Forg%2Fargeo%2Feclipse%2Fui%2Fspecific%2FFileHandler.java;fp=org.argeo.eclipse.ui.rcp%2Fsrc%2Forg%2Fargeo%2Feclipse%2Fui%2Fspecific%2FFileHandler.java;h=5da49736d472facf6500a1350dd8ab9905c794bb;hb=864072113f7a44fd2a291a4cb50659d6e67f8c29;hp=0000000000000000000000000000000000000000;hpb=7c91575c43d8ffae589f773735b63a1b2994a25c;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.eclipse.ui.rcp/src/org/argeo/eclipse/ui/specific/FileHandler.java b/org.argeo.eclipse.ui.rcp/src/org/argeo/eclipse/ui/specific/FileHandler.java
new file mode 100644
index 000000000..5da49736d
--- /dev/null
+++ b/org.argeo.eclipse.ui.rcp/src/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;
+	}
+}