// $Id: ErrorReportSOAP12.java,v 1.2 2005-09-14 15:14:18 ylafon Exp $

// Author: Jean-Guilhem Rouel

// (c) COPYRIGHT MIT, ERCIM and Keio, 2003.

// Please first read the full copyright statement in file COPYRIGHT.html

package org.w3c.css.error;

import java.io.PrintWriter;

import java.net.URL;

import java.net.UnknownHostException;

import org.w3c.css.util.ApplContext;

import org.w3c.css.util.Utf8Properties;

/**

 * ErrorReportSOAP12<br />

 * Created: Jul 13, 2005 2:06:00 PM<br />

 * This class allows to create 2 different soap messages to handle errors:

 * <ul>

 * <li>Sender errors if the URI given in parameter of the servlet is invalid</li>

 * <li>Receiver errors if the URI given is valid but inreachable</li>

 * </ul>

 */

public class ErrorReportSOAP12 extends ErrorReport {

    private String title;

    private boolean validURI;

    private Exception exception;

    private ApplContext ac;

    private static Utf8Properties messages;

    private PrintWriter out;

    ErrorReportSOAP12(ApplContext ac, String title, String output, Exception e,

	    boolean validURI) {

	this.ac = ac;

	this.exception = e;

	this.validURI = validURI;

	this.title = title;

    }

    /**

     * @see org.w3c.css.error.ErrorReport#print(java.io.PrintWriter)

     */

    public void print(PrintWriter out) {

	this.out = out;

	// the error message

	String errorMessage = exception.getMessage();

	// the string containing the soap response pattern

	String report;

	if(validURI) {

	    report = messages.getProperty("receiver");

	    if(exception instanceof UnknownHostException) {

		errorMessage = "The host name " + errorMessage +

			       " couldn't be resolved";

            }

	}

	else {

	    report = messages.getProperty("sender");

	}

	processError(report, errorMessage , title + " " + exception);

    }

    /**

     * Prints on the output the soap message str, where each entity<br/>

     * has been replaced by it's value<br/>

     * An entity is an xml comment (<!-- -->) containing a single word

     *  beginning by #<br/>

     * Valid entities names are:

     * <ul>

     * <li><i>charset</i>: prints the charset defined in the Applcontext</li>

     * <li><i>reason</i>: prints the reason of the error</li>

     * <li><i>details</i>: prints the detailed reason of the error</li>

     * </ul>

     * @param str the soap message pattern

     * @param errorMessage the error message (see reason entity)

     * @param details the detailed message error (see details entity)

     */

    private void processError(String str, String errorMessage, String details) {

	try {

	    int i = 0;

	    while ((i = str.indexOf("<!-- #", i)) >= 0) {

		int lastIndexOfEntity = str.indexOf("-->", i);

		String entity = str.substring(i + 6, lastIndexOfEntity - 1)

		    .toLowerCase();

		// reason entity

		if (entity.equals("reason")) {

		    out.print(str.substring(0, i));

		    str = str.substring(lastIndexOfEntity + 3);

		    i = 0;

		    out.print(errorMessage);

		}

		// details entity

		else if (entity.equals("details")) {

		    out.print(str.substring(0, i));

		    str = str.substring(lastIndexOfEntity + 3);

		    i = 0;

		    out.print(details);

		}

		//charset entity

		else if (entity.equals("charset")) {

		    out.print(str.substring(0, i));

		    str = str.substring(lastIndexOfEntity + 3);

		    i = 0;

		    out.print(ac.getContentEncoding());

		}

		else {

		    i += 6; // skip this unknown entity

		}

	    }

	    // print the end of the string

	    if(str != null) {

		out.print(str);

	    }

	} catch (Exception e) {

	    e.printStackTrace();

	    if(str != null) {

		out.print(str);

	    }

	}

    }

    static {

	// load the soaperror.properties

	URL url;

	messages = new Utf8Properties();

	try {

	    url = ErrorReportSOAP12.class.getResource("soaperror.properties");

	    java.io.InputStream f = url.openStream();

	    messages.load(f);

	    f.close();

	} catch (Exception e) {

	    System.err.println("org.w3c.css.error.ErrorReportSOAP12: "

			       + "couldn't load soap error messages properties ");

	    System.err.println("  " + e.toString());

	}

    }

}