Gets the destination image type. - Java 2D Graphics

Java examples for 2D Graphics:Image

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Description

Gets the destination image type.

Demo Code

/*/*from  w  w  w. ja  v a 2  s  .  c om*/
 * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 */
//package com.java2s;

import java.util.Iterator;
import javax.imageio.IIOException;

import javax.imageio.ImageReadParam;
import javax.imageio.ImageTypeSpecifier;

public class Main {
    /**
     * Gets the destination image type.
     */
    public static final ImageTypeSpecifier getDestinationType(
            ImageReadParam param, Iterator<ImageTypeSpecifier> imageTypes)
            throws IIOException {

        if (imageTypes == null || !imageTypes.hasNext()) {
            throw new IllegalArgumentException("imageTypes null or empty!");
        }

        ImageTypeSpecifier imageType = null;

        // If param is non-null, use it
        if (param != null) {
            imageType = param.getDestinationType();
        }

        // No info from param, use fallback image type
        if (imageType == null) {
            Object o = imageTypes.next();
            if (!(o instanceof ImageTypeSpecifier)) {
                throw new IllegalArgumentException(
                        "Non-ImageTypeSpecifier retrieved from imageTypes!");
            }
            imageType = (ImageTypeSpecifier) o;
        } else {
            boolean foundIt = false;
            while (imageTypes.hasNext()) {
                ImageTypeSpecifier type = imageTypes.next();
                if (type.equals(imageType)) {
                    foundIt = true;
                    break;
                }
            }

            if (!foundIt) {
                throw new IIOException(
                        "Destination type from ImageReadParam does not match!");
            }
        }

        return imageType;
    }
}

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