dol: initial dol commit

[jump.git] / dol / src / dol / util / Sed.java

diff --git a/dol/src/dol/util/Sed.java b/dol/src/dol/util/Sed.java
new file mode 100644 (file)
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+++ b/dol/src/dol/util/Sed.java
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+/* $Id: Sed.java 1 2010-02-24 13:03:05Z haidw $ */\r
+package dol.util;\r
+\r
+import java.io.BufferedReader;\r
+import java.io.BufferedWriter;\r
+import java.io.File;\r
+import java.io.FileInputStream;\r
+import java.io.FileWriter;\r
+import java.io.IOException;\r
+import java.io.InputStreamReader;\r
+\r
+/**\r
+ * Class to find and replace strings in a files of a directory.\r
+ * The intention is to get a behavior similar to UNIX's sed (stream\r
+ * editor).\r
+ */\r
+public class Sed {\r
+\r
+    /**\r
+     * In the given file, search for occurences of the given search\r
+     * pattern and replace it by the given replacement.\r
+     * searchPattern, replacementPattern will be used in a call of\r
+     * String.replaceAll(searchPattern, replacementPattern).\r
+     *\r
+     * @param filename file to search\r
+     * @param searchPattern regular expression to search for\r
+     * @param replacementPattern replacement\r
+     */\r
+    protected void readReplace(String filename, String searchPattern,\r
+            String replacementPattern) throws IOException {\r
+        String line;\r
+        StringBuffer buffer = new StringBuffer();\r
+        FileInputStream fileInputStream = new FileInputStream(filename);\r
+        BufferedReader reader = new BufferedReader(\r
+                new InputStreamReader(fileInputStream));\r
+        while((line = reader.readLine()) != null) {\r
+            String newline = line.replaceAll(searchPattern, replacementPattern);\r
+            /*\r
+            if (!newline.equals(line)) {\r
+                System.out.println("Found pattern in " + filename\r
+                        + ". New line: " + newline);\r
+            }\r
+            */\r
+            buffer.append(newline + "\n");\r
+        }\r
+        reader.close();\r
+        BufferedWriter out = new BufferedWriter(new FileWriter(filename));\r
+        out.write(buffer.toString());\r
+        out.close();\r
+    }\r
+\r
+    /**\r
+     * Iterate through the given directory tree. For each file found in\r
+     * the file, the method\r
+     * {@link #processFile(java.lang.String)} is called.\r
+     *\r
+     * @param path the path of the directory to be browsed\r
+     * @param currentDir the subdirectory currently explored\r
+     */\r
+    protected void browseDirectoryTree(String path)\r
+            throws IOException {\r
+        File file = new File(path);\r
+\r
+        if (!file.exists()) return;\r
+        if (!file.isDirectory()) return;\r
+\r
+        //loop through files in directory\r
+        String[] files = file.list();\r
+\r
+        for (int k = 0; k < files.length; k++) {\r
+            File newfile = new File(file.getPath(), files[k]);\r
+            if (newfile.isFile())\r
+                readReplace(path + System.getProperty("file.separator")\r
+                        + files[k], _searchPattern, _replacementPattern);\r
+            else if (newfile.isDirectory()) {\r
+                browseDirectoryTree(file.getPath()\r
+                        + System.getProperty("file.separator")\r
+                        + files[k]);\r
+            }\r
+        }\r
+    }\r
+\r
+    /**\r
+     * In the given file or in the files located in the given directory,\r
+     * search for occurences of the given search pattern and replace it\r
+     * by the given replacement. searchPattern, replacementPattern will\r
+     * be used in a call of\r
+     * String.replaceAll(searchPattern, replacementPattern).\r
+     *\r
+     * @param path file or path to search\r
+     * @param searchPattern regular expression to search for\r
+     * @param replacementPattern replacement\r
+     */\r
+    public void sed(String path, String searchPattern,\r
+            String replacementPattern) throws IOException {\r
+        File file = new File(path);\r
+        _searchPattern = searchPattern;\r
+        _replacementPattern = replacementPattern;\r
+        if (!file.exists()) return;\r
+        if (file.isFile()) {\r
+            readReplace(path, searchPattern, replacementPattern);\r
+        }\r
+        else if (file.isDirectory()) {\r
+            browseDirectoryTree(path);\r
+        }\r
+    }\r
+\r
+    /**\r
+     * Test the implementation.\r
+     *\r
+     * @param args args[0] file or directory to search\r
+     *             args[1] regular expression to search for\r
+     *             args[2] replacement\r
+     */\r
+    public static void main(String args[]) {\r
+        if (args.length == 3) {\r
+            try {\r
+                new Sed().sed(args[0], args[1], args[2]);\r
+            }\r
+            catch (IOException e) {\r
+                System.out.println("Sed: An error occured:");\r
+                System.out.println(e.getMessage());\r
+            }\r
+        }\r
+        else {\r
+            System.out.println("usage: java Sed directory|file "\r
+                    + "searchPattern replacementPattern");\r
+        }\r
+    }\r
+\r
+    String _searchPattern = "";\r
+    String _replacementPattern = "";\r
+}\r