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[Jnode-svn-commits] SF.net SVN: jnode:[5369] trunk/cli/src/commands/org/jnode/command
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From: <chr...@us...> - 2009-04-30 04:12:28
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Revision: 5369
http://jnode.svn.sourceforge.net/jnode/?rev=5369&view=rev
Author: chrisboertien
Date: 2009-04-30 04:12:27 +0000 (Thu, 30 Apr 2009)
Log Message:
-----------
New openReader methods for IOUtils and some cat updates
Signed-off-by: chrisboertien <chr...@gm...>
Modified Paths:
--------------
trunk/cli/src/commands/org/jnode/command/file/CatCommand.java
trunk/cli/src/commands/org/jnode/command/util/IOUtils.java
Modified: trunk/cli/src/commands/org/jnode/command/file/CatCommand.java
===================================================================
--- trunk/cli/src/commands/org/jnode/command/file/CatCommand.java 2009-04-30 03:13:37 UTC (rev 5368)
+++ trunk/cli/src/commands/org/jnode/command/file/CatCommand.java 2009-04-30 04:12:27 UTC (rev 5369)
@@ -41,7 +41,7 @@
/**
* Read files or network resources and write the concatenation to standard output. If
* no filenames or URIs are provided, copy standard input to standard output. Data is
- * copied byte-wise.
+ * copied byte-wise unless flags are used that add additional formatting to the lines.
* <p>
* If any file or URL cannot be opened, it is skipped and we (eventually) set a non-zero
* return code. If we get an IOException reading or writing data, we allow it to propagate.
@@ -50,6 +50,7 @@
* @author Andreas H\u00e4nel
* @author cr...@jn...
* @author Fabien DUMINY (fd...@jn...)
+ * @author chris boertien
*/
public class CatCommand extends AbstractCommand {
@@ -81,6 +82,7 @@
private File[] files;
private String end;
private int rc = 0;
+ private int lineCount;
private boolean squeeze;
private boolean numAll;
private boolean numNB;
@@ -190,7 +192,6 @@
private void processReader(BufferedReader reader) throws IOException {
String line;
boolean haveBlank = false;
- int lineCount = 0;
while ((line = reader.readLine()) != null) {
if (line.length() == 0) {
@@ -217,8 +218,8 @@
* Attempt to open a file, writing an error message on failure. If the file
* is '-', return stdin.
*
- * @param fname the filename of the file to be opened
- * @return An open stream, or <code>null</code>.
+ * @param file the file to open the stream on
+ * @return the reader, or null
*/
private InputStream openFileStream(File file) {
InputStream ret = null;
@@ -235,15 +236,21 @@
return ret;
}
+ /**
+ * Attempt to open a file reader, writing an error message on failure. If the file
+ * is '-', return stdin.
+ *
+ * @param file the file to open the reader on
+ * @return the reader, or null
+ */
private BufferedReader openFileReader(File file) {
BufferedReader ret = null;
if (file.getName().equals("-")) {
ret = new BufferedReader(in, BUFFER_SIZE);
} else {
- try {
- ret = new BufferedReader(new FileReader(file), BUFFER_SIZE);
- } catch (FileNotFoundException e) {
+ ret = IOUtils.openBufferedReader(file, BUFFER_SIZE);
+ if (ret == null) {
err.format(err_file, file);
}
}
Modified: trunk/cli/src/commands/org/jnode/command/util/IOUtils.java
===================================================================
--- trunk/cli/src/commands/org/jnode/command/util/IOUtils.java 2009-04-30 03:13:37 UTC (rev 5368)
+++ trunk/cli/src/commands/org/jnode/command/util/IOUtils.java 2009-04-30 04:12:27 UTC (rev 5369)
@@ -27,8 +27,10 @@
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
+import java.io.FileReader;
import java.io.Flushable;
import java.io.InputStream;
+import java.io.LineNumberReader;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
@@ -218,6 +220,66 @@
}
/**
+ * Opens a Reader on a file.
+ *
+ * This method will not throw a FileNotFoundException like the FileReader
+ * constructor would.
+ *
+ * @param file the file to open the reader on
+ * @return the reader, or null if the file could not be opened
+ * @throws NullPointerException if file is null
+ */
+ public static Reader openReader(File file) {
+ checkNull(file);
+
+ try {
+ return new FileReader(file);
+ } catch (FileNotFoundException e) {
+ // fall through
+ }
+
+ return null;
+ }
+
+ /**
+ * Opens a BufferedReader on a file.
+ *
+ * This method will not throw a FileNotFoundException like the FileReader
+ * constructor would.
+ *
+ * @param file the file to open the reader on
+ * @param bufferSize the buffer size to use for this reader
+ * @return the reader, or null if the file could not be opened
+ * @throws NullPointerException if file is null
+ */
+ public static BufferedReader openBufferedReader(File file, int bufferSize) {
+ Reader reader = openReader(file);
+ if (reader != null) {
+ return new BufferedReader(reader, bufferSize);
+ }
+ return null;
+ }
+
+ /**
+ * Opens a LineNumberReader on a file.
+ *
+ * This method will not throw a FileNotFoundException like the FileReader
+ * constructor would.
+ *
+ * @param file the file to open the reader on
+ * @param bufferSize the buffer size to use for this reader
+ * @return the reader, or null if the file could not be opened
+ * @throws NullPointerException if file is null
+ */
+ public static LineNumberReader openLineReader(File file, int bufferSize) {
+ Reader reader = openReader(file);
+ if (reader != null) {
+ return new LineNumberReader(reader, bufferSize);
+ }
+ return null;
+ }
+
+ /**
* Opens an OutputStream on a file for writing.
*
* If the file exists and has content, it will be overwritten. That is to say the append
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