org.eclipse.egit.ui.internal.ValidationUtils.java Source code

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Here is the source code for org.eclipse.egit.ui.internal.ValidationUtils.java

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/*******************************************************************************
 * Copyright (C) 2010, Dariusz Luksza <dariusz@luksza.org>
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *******************************************************************************/

package org.eclipse.egit.ui.internal;

import java.io.IOException;

import org.eclipse.egit.ui.Activator;
import org.eclipse.egit.ui.UIText;
import org.eclipse.jface.dialogs.IInputValidator;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.osgi.util.NLS;

/**
 * A collection of validators
 */
public class ValidationUtils {
    /**
     * Creates and returns input validator for refNames
     *
     * @param repo
     * @param refPrefix
     * @param errorOnEmptyName
     * @return input validator for refNames
     */
    public static IInputValidator getRefNameInputValidator(final Repository repo, final String refPrefix,
            final boolean errorOnEmptyName) {
        return new IInputValidator() {
            public String isValid(String newText) {
                if (newText.length() == 0) {
                    if (errorOnEmptyName)
                        return UIText.ValidationUtils_PleaseEnterNameMessage;
                    else
                        // ignore this
                        return null;
                }
                String testFor = refPrefix + newText;
                try {
                    if (repo.resolve(testFor) != null)
                        return NLS.bind(UIText.ValidationUtils_RefAlreadyExistsMessage, testFor);
                } catch (IOException e1) {
                    Activator.logError(NLS.bind(UIText.ValidationUtils_CanNotResolveRefMessage, testFor), e1);
                    return e1.getMessage();
                }
                if (!Repository.isValidRefName(testFor))
                    return NLS.bind(UIText.ValidationUtils_InvalidRefNameMessage, testFor);
                return null;
            }
        };
    }
}