com.liferay.image.editor.hook.action.ActionUtil.java Source code

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Here is the source code for com.liferay.image.editor.hook.action.ActionUtil.java

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/**
 * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.image.editor.hook.action;

import com.liferay.portal.kernel.language.LanguageUtil;
import com.liferay.portal.kernel.util.Base64;
import com.liferay.portal.kernel.util.FileUtil;
import com.liferay.portal.kernel.util.StringPool;
import com.liferay.portal.kernel.util.WebKeys;
import com.liferay.portal.theme.ThemeDisplay;

import java.awt.image.BufferedImage;

import java.io.ByteArrayInputStream;
import java.io.File;

import java.util.Iterator;

import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;

import javax.portlet.ActionRequest;

/**
 * @author Roberto Daz
 */
public class ActionUtil {

    public static String getChangeLog(ActionRequest actionRequest) {
        ThemeDisplay themeDisplay = (ThemeDisplay) actionRequest.getAttribute(WebKeys.THEME_DISPLAY);

        return LanguageUtil.get(themeDisplay.getLocale(), "this-image-has-been-modified-using-web-image-editor");
    }

    public static File getImageFromBlob(String blob, String formatName) throws Exception {

        blob = blob.substring(blob.indexOf(StringPool.COMMA) + 1);

        byte[] decodedBytes = Base64.decode(blob);

        ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(decodedBytes);

        ImageInputStream imageInputStream = ImageIO.createImageInputStream(byteArrayInputStream);

        Iterator<?> readerIterator = ImageIO.getImageReadersByFormatName(formatName);

        ImageReader reader = (ImageReader) readerIterator.next();

        reader.setInput(imageInputStream, true);

        ImageReadParam defaultReadParam = reader.getDefaultReadParam();

        BufferedImage bufferedImage = reader.read(0, defaultReadParam);

        File imageFile = FileUtil.createTempFile();

        ImageIO.write(bufferedImage, formatName, imageFile);

        return imageFile;
    }

}