package org.symbian.tools.tmw.internal.ui.wizard;

import java.text.MessageFormat;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import org.eclipse.core.databinding.validation.IValidator;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.core.runtime.Status;

import org.symbian.tools.tmw.ui.TMWCoreUI;

public class RegexpValidator implements IValidator {

    private final String errorMessage;

    private final Pattern pattern;

    private final boolean match;

    public RegexpValidator(String pattern, String errorMessage, boolean match) {

        this.errorMessage = errorMessage;

        this.match = match;

        this.pattern = Pattern.compile(pattern);

    }

    public IStatus validate(Object value) {

        String string = value.toString();

        Matcher matcher = pattern.matcher(string);

        if (match && !matcher.matches()) {

            return new Status(IStatus.ERROR, TMWCoreUI.PLUGIN_ID, MessageFormat.format(errorMessage, string));

        } else if (!match && matcher.find()) {

            return new Status(IStatus.ERROR, TMWCoreUI.PLUGIN_ID, MessageFormat.format(errorMessage,

                    string.substring(matcher.start(), matcher.end())));

        } else {

            return Status.OK_STATUS;

        }

    }

}