Thread: [Japi-cvs] SF.net SVN: japi: [259] libs/argparser/trunk/src/doc/examples/Recode.java

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Revision: 259
          http://svn.sourceforge.net/japi/?rev=259&view=rev
Author:   christianhujer
Date:     2006-12-14 15:09:33 -0800 (Thu, 14 Dec 2006)

Log Message:
-----------
Added new example: Recode.

Added Paths:
-----------
    libs/argparser/trunk/src/doc/examples/Recode.java

Added: libs/argparser/trunk/src/doc/examples/Recode.java
===================================================================

--- libs/argparser/trunk/src/doc/examples/Recode.java	                        (rev 0)
+++ libs/argparser/trunk/src/doc/examples/Recode.java	2006-12-14 23:09:33 UTC (rev 259)
@@ -0,0 +1,101 @@
+package examples;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.io.Reader;
+import java.io.Writer;
+import java.io.FileNotFoundException;
+import java.util.List;
+import net.sf.japi.io.args.BasicCommand;
+import net.sf.japi.io.args.Option;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Recode is a Java program that recodes files from one encoding to another.
+ * Warning: This file changes permissions and eventually ownership.
+ * @author <a href="mailto:ch...@ri...">Christian Hujer</a>
+ */
+public class Recode extends BasicCommand {
+
+    /** The InputEncoding to use. */
+    private String inputEncoding;
+
+    /** The OutputEncoding to use. */
+    private String outputEncoding;
+
+    @Option({"i", "inputEncoding"})
+    public void setInputEncoding(final String inputEncoding) {
+        this.inputEncoding = inputEncoding;
+    }
+
+    @Option({"o", "outputEncoding"})
+    public void setOutputEncoding(final String outputEncoding) {
+        this.outputEncoding = outputEncoding;
+    }
+
+    /** {@inheritDoc} */
+    @SuppressWarnings({"InstanceMethodNamingConvention"})
+    public int run(@NotNull List<String> args) throws Exception {
+        int returnCode = 0;
+        if (args.size() == 0) {
+            recode(System.in, System.out);
+        } else {
+            for (final String filename : args) {
+                try {
+                    recode(filename);
+                } catch (final IOException e) {
+                    returnCode = 1;
+                    System.err.println(e);
+                }
+            }
+        }
+        return returnCode;
+    }
+
+    /**
+     * Recodes a File from the specified input encoding to the specified output encoding.
+     * @param filename Filename of the file to recode
+     * @throws IOException In case of I/O problems.
+     */
+    public void recode(final String filename) throws IOException {
+        final File file = new File(filename);
+        final File tmpFile = File.createTempFile("recode", null, file.getParentFile());
+        final InputStream in = new FileInputStream(file);
+        try {
+            final OutputStream out = new FileOutputStream(tmpFile);
+            try {
+                recode(in, out);
+            } finally {
+                out.close();
+            }
+            if (!tmpFile.renameTo(file)) {
+                tmpFile.delete();
+                throw new FileNotFoundException("Couldn't open " + file + " for writing.");
+            }
+        } finally {
+            in.close();
+        }
+    }
+
+    /**
+     * Recodes a Stream and writes the data to another Stream.
+     * @param in InputStream to recode
+     * @param out OutputStream to recode
+     * @throws IOException In case of I/O problems.
+     */
+    public void recode(final InputStream in, final OutputStream out) throws IOException {
+        final Reader cin  = new InputStreamReader(in, inputEncoding);
+        final Writer cout = new OutputStreamWriter(out, outputEncoding);
+        final char[] buf = new char[4096];
+        //noinspection StatementWithEmptyBody
+        for (int charsRead; (charsRead = cin.read(buf)) != -1; cout.write(buf, 0, charsRead));
+        cout.flush();
+    }
+
+} // class Recode


Property changes on: libs/argparser/trunk/src/doc/examples/Recode.java
___________________________________________________________________
Name: svn:mime-type
   + text/plain
Name: svn:eol-style
   + LF


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Thread: [Japi-cvs] SF.net SVN: japi: [259] libs/argparser/trunk/src/doc/examples/Recode.java

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