/*
 * Copyright (c) 2014-2021 by Wen Yu
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the Eclipse
 * Public License, v. 2.0 are satisfied: GNU General Public License, version 2
 * or any later version.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
 */

package pixy.image.tiff;

import java.io.IOException;

import pixy.io.RandomAccessOutputStream;
import pixy.string.StringUtils;

/**
 * TIFF Attribute.UNDEFINED type field.
 * 
 * @author Wen Yu, yuwen_66@yahoo.com
 * @version 1.0 02/05/2013
 */
public final class UndefinedField extends TiffField<byte[]> {

	public UndefinedField(short tag, byte[] data) {
		super(tag, FieldType.UNDEFINED, data.length);
		this.data = data;
	}
	
	public byte[] getData() {
		return data.clone();
	}
	
	public String getDataAsString() {
		return StringUtils.byteArrayToHexString(data, 0, MAX_STRING_REPR_LEN);
	}
	
	protected int writeData(RandomAccessOutputStream os, int toOffset) throws IOException {
	
		if (data.length <= 4) {
			dataOffset = (int)os.getStreamPointer();
			byte[] tmp = new byte[4];
			System.arraycopy(data, 0, tmp, 0, data.length);
			os.write(tmp);
		} else {
			dataOffset = toOffset;
			os.writeInt(toOffset);
			os.seek(toOffset);
			os.write(data);
			toOffset += data.length;
		}
		
		return toOffset;
	}
}