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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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package basicajax;

import java.io.IOException;
import java.io.InputStreamReader;
import java.io.StringWriter;
import java.io.BufferedReader;
import java.io.PrintWriter;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;

/**
 * EL Functions.
 */
public class Functions {

    private static final Logger LOGGER = Logger.getLogger(Functions.class.getName());


    // ---------------------------------------------------------- Public Methods


    /**
     * <p>
     * Write the file content to the current ResponseWriter.
     * </p>
     *
     * @param ctx the <code>FacesContext</code> for the current request
     * @param file the file to display
     */
    public static void writeSource(FacesContext ctx, String file) {

        // PENDING - add logic to colorize key words/XML elements?
        // PENDING - add logic to strip licence header

        ExternalContext extCtx = ctx.getExternalContext();
        BufferedReader r =
              new BufferedReader(
                    new InputStreamReader(extCtx.getResourceAsStream(file)));
        StringWriter w = new StringWriter();
        PrintWriter pw = new PrintWriter(w);

        try {
            int lineNumber = 1;
            for (String s = r.readLine(); s != null; s = r.readLine()) {
                pw.format("%3s", Integer.toString(lineNumber++));
                pw.write(": ");
                pw.write(s);
                pw.write('\n');
            }
            ctx.getResponseWriter().writeText(w.toString(), null);
        } catch (IOException ioe) {
            if (LOGGER.isLoggable(Level.SEVERE)) {
                LOGGER.log(Level.SEVERE,
                           ioe.toString(),
                           ioe);
            }
        }

    }
}
