recursive replace

[meviz.git] / src / main / java / eu / svjatoslav / meviz / replace / Main.java

diff --git a/src/main/java/eu/svjatoslav/meviz/replace/Main.java b/src/main/java/eu/svjatoslav/meviz/replace/Main.java
new file mode 100755 (executable)
index 0000000..3355e92
--- /dev/null
+++ b/src/main/java/eu/svjatoslav/meviz/replace/Main.java
@@ -0,0 +1,110 @@
+/*
+ * Meviz - Various tools collection to work with multimedia.
+ * Copyright (C) 2012, Svjatoslav Agejenko, svjatoslav@svjatoslav.eu
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ */
+
+package eu.svjatoslav.meviz.replace;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+
+import eu.svjatoslav.meviz.Module;
+
+public class Main implements Module {
+
+       CommandlineHandler commandlineHandler = new CommandlineHandler();
+
+       CommandlineOptions options;
+
+
+       @Override
+       public String getDescription() {
+               return "Replace one string to another string in all occurrances and all files recursively.";
+       }
+
+       @Override
+       public String getModuleCommand() {
+               return "replace";
+       }
+
+       public void processDirectory(final File directory) {
+
+               for (final File file : directory.listFiles())
+                       if (file.isDirectory()) {
+                               if (options.recursive)
+                                       processDirectory(file);
+                       } else
+                               try {
+                                       processFile(file);
+                               } catch (final IOException exception) {
+                                       System.out.println("Error processing file: "
+                                                       + file.getAbsolutePath());
+                                       System.out.println("   exception: "
+                                                       + exception.getMessage());
+                               }
+
+       }
+
+       public void processFile(final File file) throws IOException {
+
+               FileReader fileReader = new FileReader(file);
+               BufferedReader bufferedReader = new BufferedReader(fileReader);
+
+               StringBuffer result = new StringBuffer();
+
+               boolean contentChanged = false;
+
+               while (true) {
+                       String line = bufferedReader.readLine();
+                       if (line == null)
+                               break;
+
+                       String newLine = line.replace(options.searchForPattern,
+                                       options.replaceWithPattern);
+
+                       if (!contentChanged)
+                               if (!newLine.equals(line))
+                                       contentChanged = true;
+
+                       result.append(newLine);
+                       result.append("\n");
+               }
+
+               bufferedReader.close();
+               fileReader.close();
+
+               if (contentChanged) {
+                       FileWriter fileWriter = new FileWriter(file);
+                       fileWriter.write(result.toString());
+                       fileWriter.close();
+               }
+
+       }
+
+       @Override
+       public void run(final String[] args) throws IOException {
+
+               options = commandlineHandler.parseCommandlineArguments(args);
+
+               if (options == null) {
+                       showCommandlineHelp();
+                       return;
+               }
+
+               processDirectory(options.targetDirectory);
+
+       }
+
+       @Override
+       public void showCommandlineHelp() {
+               commandlineHandler.initParser().showHelp();
+       }
+
+}