ErrorHandlerImpl.java

package com.occamlab.te;

import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXParseException;

import java.io.PrintWriter;

/**
 * Handles errors arising while processing XML resources and records the numbers
 * of error and warning notifications received.
 * 
 */
public class ErrorHandlerImpl implements ErrorHandler {
    private int ErrorCount = 0;

    private int WarningCount = 0;

    private PrintWriter Logger;

    private String Prefix = "";

    public ErrorHandlerImpl() {
        this(null, new PrintWriter(System.out));
    }

    public ErrorHandlerImpl(String role, PrintWriter logger) {
        setRole(role);
        setLogger(logger);
    }

    public void setRole(String role) {
        if (role != null) {
            Prefix = role + " ";
        }
    }

    public void setLogger(PrintWriter logger) {
        Logger = logger;
    }

    public String getErrorCounts() {
        String msg = "";
        if (ErrorCount > 0 || WarningCount > 0) {
            if (ErrorCount > 0) {
                msg += ErrorCount + " error" + (ErrorCount == 1 ? "" : "s");
                if (WarningCount > 0)
                    msg += " and ";
            }
            if (WarningCount > 0) {
                msg += WarningCount + " warning"
                        + (WarningCount == 1 ? "" : "s");
            }
        } else {
            msg = "No errors or warnings";
        }
        msg += " detected.";
        return msg;
    }

    private void error(String type, SAXParseException e) {
        Logger.print(type);
        if (e.getLineNumber() >= 0) {
            Logger.print(" at line " + e.getLineNumber());
            if (e.getColumnNumber() >= 0) {
                Logger.print(", column " + e.getColumnNumber());
            }
            if (e.getSystemId() != null) {
                Logger.print(" of " + e.getSystemId());
            }
        } else {
            if (e.getSystemId() != null) {
                Logger.print(" in " + e.getSystemId());
            }
        }
        Logger.println(":");
        Logger.println("  " + e.getMessage());
        Logger.flush();
        // System.err.println(type + " at line " + + e.getLineNumber() + ",
        // column " + e.getColumnNumber() + " of " + e.getSystemId() + ":");
        // System.err.println(" " + e.getMessage());
    }

    public int getErrorCount() {
        return ErrorCount;
    }

    public int getWarningCount() {
        return WarningCount;
    }

    public void error(SAXParseException exception) {
        error(Prefix + "error", exception);
        ErrorCount++;
    }

    public void fatalError(SAXParseException exception) {
        error("Fatal " + Prefix + "error", exception);
        ErrorCount++;
    }

    public void warning(SAXParseException exception) {
        error(Prefix + "warning", exception);
        WarningCount++;
    }
}