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The JGoodies Validation helps you validate user input in Swing apps and report validation errors and warnings. It has been designed to work with different architectures and programming flavors.

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/*
 * Copyright (c) 2003-2013 JGoodies Software GmbH. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  o Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  o Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 *  o Neither the name of JGoodies Software GmbH nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.jgoodies.validation.util;

import static com.jgoodies.common.base.Preconditions.checkNotNull;

import com.jgoodies.validation.ValidationResult;
import com.jgoodies.validation.ValidationResultModel;

/**
 * A default implementation of the {@link ValidationResultModel} interface
 * that holds a ValidationResult.
 *
 * @author  Karsten Lentzsch
 * @version $Revision: 1.11 $
 */
public class DefaultValidationResultModel extends AbstractValidationResultModel {

    /**
     * Holds this model's validation result.
     */
    private ValidationResult validationResult;


    // Instance Creation ******************************************************

    /**
     * Constructs a DefaultValidationResultModel initialized
     * with an empty validation result.
     */
    public DefaultValidationResultModel() {
        validationResult = ValidationResult.EMPTY;
    }


    // Accessors **************************************************************

    /**
     * Returns this model's validation result.
     *
     * @return the current validation result
     */
    @Override
	public final ValidationResult getResult() {
        return validationResult;
    }


    /**
     * Sets a new unmodifiable non-null validation result and
     * notifies all registered listeners about changes of the result itself
     * and the properties for severity, errors and messages.
     * This method is typically invoked at the end of the {@code #validate()}
     * method.
     *
     * Note: If the given validation result is modifiable,
     * an unmodifiable copy is set - and reported as new value in the
     * PropertyChangeEvent.
     *
     * @param newResult  the validation result to be set
     *
     * @throws NullPointerException if {@code newResult} is {@code null}
     *
     * @see #getResult()
     * @see ValidationResultModelContainer#setResult(ValidationResult)
     */
    @Override
	public void setResult(ValidationResult newResult) {
        checkNotNull(newResult, "The new result must not be null.");
        ValidationResult oldResult = getResult();
        validationResult = ValidationResult.unmodifiableResult(newResult);
        firePropertyChanges(oldResult, getResult());
    }


}