/*
 * Copyright (c) 2014, grossmann
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * 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.
 * * Neither the name of the jo-widgets.org 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 jo-widgets.org 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 org.jowidgets.tools.image;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;

import org.jowidgets.common.image.IUrlImageDescriptor;
import org.jowidgets.util.Assert;

public class UrlImageDescriptor implements IUrlImageDescriptor {

    private final URL url;

    /**
     * Creates a new UrlImageDescriptor from a file
     * 
     * @param file A File used to create the url from
     * 
     * @throws IllegalArgumentException if the url is malformed
     */
    public UrlImageDescriptor(final File file) {
        this(createUrl(file));
    }

    /**
     * Creates a new UrlImageDescriptor
     * 
     * @param url A String defining the url
     * 
     * @throws IllegalArgumentException if the url is malformed
     */
    public UrlImageDescriptor(final String url) {
        this(createUrl(url));
    }

    /**
     * Creates a new UrlImageDescriptor
     * 
     * @param url The url to use, must not be null
     */
    public UrlImageDescriptor(final URL url) {
        Assert.paramNotNull(url, "url");
        this.url = url;
    }

    private static URL createUrl(final String url) {
        Assert.paramNotEmpty(url, "url");
        try {
            return new URL(url);
        }
        catch (final MalformedURLException e) {
            throw new IllegalArgumentException(e);
        }
    }

    private static URL createUrl(final File file) {
        Assert.paramNotNull(file, "file");
        try {
            return file.toURI().toURL();
        }
        catch (final MalformedURLException e) {
            throw new IllegalArgumentException(e);
        }
    }

    @Override
    public final URL getImageUrl() {
        return url;
    }

    @Override
    public String toString() {
        return "UrlImageDescriptor [url=" + url + "]";
    }

}