[ADD] File merge function

Author: kang0921ok

src/com/yahoo/platform/yui/compressor/YUICompressor.java

@@ -34,7 +34,7 @@ public static void main(String args[]) {
         CmdLineParser.Option preserveUnknownHintsOpt = parser.addBooleanOption('p', "preservehints");
 
         Reader in = null;
-        Writer out = null;
+        BufferedWriter out = null;
         Writer mungemap = null;
 
         try {
@@ -113,7 +113,7 @@ public static void main(String args[]) {
             } else {
                 pattern = output.split(":");
             }
-            
+
             try {
                 String mungemapFilename = (String) parser.getOptionValue(mungemapFilenameOpt);
                 if (mungemapFilename != null) {
@@ -168,7 +168,7 @@ public static void main(String args[]) {
                             JavaScriptCompressor compressor = new JavaScriptCompressor(in, new ErrorReporter() {
 
                                 public void warning(String message, String sourceName,
-                                        int line, String lineSource, int lineOffset) {
+                                                    int line, String lineSource, int lineOffset) {
                                     System.err.println("\n[WARNING] in " + localFilename);
                                     if (line < 0) {
                                         System.err.println("  " + message);
@@ -178,7 +178,7 @@ public void warning(String message, String sourceName,
                                 }
 
                                 public void error(String message, String sourceName,
-                                        int line, String lineSource, int lineOffset) {
+                                                  int line, String lineSource, int lineOffset) {
                                     System.err.println("[ERROR] in " + localFilename);
                                     if (line < 0) {
                                         System.err.println("  " + message);
@@ -188,7 +188,7 @@ public void error(String message, String sourceName,
                                 }
 
                                 public EvaluatorException runtimeError(String message, String sourceName,
-                                        int line, String lineSource, int lineOffset) {
+                                                                       int line, String lineSource, int lineOffset) {
                                     error(message, sourceName, line, lineSource, lineOffset);
                                     return new EvaluatorException(message);
                                 }
@@ -199,9 +199,10 @@ public EvaluatorException runtimeError(String message, String sourceName,
                             in.close(); in = null;
 
                             if (outputFilename == null) {
-                                out = new OutputStreamWriter(System.out, charset);
+                                out = new BufferedWriter(new OutputStreamWriter(System.out, charset));
                             } else {
-                                out = new OutputStreamWriter(new FileOutputStream(outputFilename), charset);
+                                out = new BufferedWriter
+                                        (new OutputStreamWriter(new FileOutputStream(outputFilename, true), charset));
                                 if (mungemap != null) {
                                     mungemap.write("\n\nFile: "+outputFilename+"\n\n");
                                 }
@@ -227,9 +228,10 @@ public EvaluatorException runtimeError(String message, String sourceName,
                         in.close(); in = null;
 
                         if (outputFilename == null) {
-                            out = new OutputStreamWriter(System.out, charset);
-                        } else {
-                            out = new OutputStreamWriter(new FileOutputStream(outputFilename), charset);
+                            out = new BufferedWriter(new OutputStreamWriter(System.out, charset));
+                        }  else {
+                            out = new BufferedWriter
+                                    (new OutputStreamWriter(new FileOutputStream(outputFilename), charset));
                         }
 
                         compressor.compress(out, linebreakpos);
@@ -306,4 +308,4 @@ private static void usage() {
                         + "option is required. Otherwise, the 'type' option is required only if the input\n"
                         + "file extension is neither 'js' nor 'css'.");
     }
-}
+}