org.eclipse.jface.databinding.dialog.ValidationMessageProvider.java Source code

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Here is the source code for org.eclipse.jface.databinding.dialog.ValidationMessageProvider.java

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/*******************************************************************************
 * Copyright (c) 2009, 2018 Ovidio Mallo and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     Ovidio Mallo - initial API and implementation (bug 248877)
 ******************************************************************************/

package org.eclipse.jface.databinding.dialog;

import org.eclipse.core.databinding.ValidationStatusProvider;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.dialogs.IMessageProvider;

/**
 * Standard implementation of the {@link IValidationMessageProvider} interface.
 *
 * @since 1.4
 */
public class ValidationMessageProvider implements IValidationMessageProvider {

    /**
     * Returns the {@link IStatus#getMessage() message} of the
     * <code>IStatus</code> contained in the provided
     * <code>validationStatusProvider</code> as is or <code>null</code> if the
     * <code>validationStatusProvider</code> is itself <code>null</code>.
     */
    @Override
    public String getMessage(ValidationStatusProvider statusProvider) {
        if (statusProvider != null) {
            IStatus status = statusProvider.getValidationStatus().getValue();
            return status.getMessage();
        }
        return null;
    }

    /**
     * Returns the message type defined in {@link IMessageProvider} which
     * naturally maps to the {@link IStatus#getSeverity()} of the
     * <code>IStatus</code> contained in the provided
     * <code>validationStatusProvider</code>.
     */
    @Override
    public int getMessageType(ValidationStatusProvider statusProvider) {
        if (statusProvider == null) {
            return IMessageProvider.NONE;
        }

        IStatus status = statusProvider.getValidationStatus().getValue();
        int severity = status.getSeverity();
        switch (severity) {
        case IStatus.OK:
            return IMessageProvider.NONE;
        case IStatus.CANCEL:
            return IMessageProvider.NONE;
        case IStatus.INFO:
            return IMessageProvider.INFORMATION;
        case IStatus.WARNING:
            return IMessageProvider.WARNING;
        case IStatus.ERROR:
            return IMessageProvider.ERROR;
        default:
            Assert.isTrue(false, "incomplete switch statement"); //$NON-NLS-1$
            return -1; // unreachable
        }
    }
}