EDIT

// $Id$

/**

* Copyright (C) 2009 EDIT

* European Distributed Institute of Taxonomy 

* http://www.e-taxonomy.eu

* 

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.common.media;

import java.io.IOException;

import java.io.InputStream;

import java.net.URI;

import java.util.HashMap;

import java.util.Map;

import org.apache.commons.lang.StringUtils;

import org.apache.http.HttpException;

import org.apache.http.client.ClientProtocolException;

import org.apache.log4j.Logger;

import org.apache.sanselan.ImageReadException;

import org.apache.sanselan.Sanselan;

import org.apache.sanselan.common.IImageMetadata;

import org.apache.sanselan.common.ImageMetadata.Item;

import eu.etaxonomy.cdm.common.UriUtils;

/**

 * @author k.luther

 * @date 27.11.2009

 *

 */

public  class ImageInfo extends MediaInfo {

	private static Logger logger = Logger.getLogger(ImageInfo.class);

	private int width;

	private int height;

	private int bitPerPixel;

	private URI imageUri;

	private Map<String, String> metaData;

//********************** Factory Methods ******************************/

	public static ImageInfo NewInstance(URI imageUri, Integer timeOut) throws IOException, HttpException {

		ImageInfo instance = new ImageInfo(imageUri);

		instance.readSuffix();

		instance.readImageLength();

		instance.readImageInfo(timeOut);

		return instance;

	}

	public static ImageInfo NewInstanceWithMetaData(URI imageUri, Integer timeOut) throws IOException, HttpException {

		ImageInfo instance = NewInstance(imageUri, timeOut);

		instance.readMetaData(timeOut);

		return instance;

	}

//*********************** CONSTRUCTOR **************************************/

	private ImageInfo(URI imageUri){

		this.imageUri = imageUri;

	}

//*************************** GETTER /SETTER *******************************/

	public URI getUri() {

		return imageUri;

	}

	public int getWidth() {

		return width;

	}

	public int getHeight() {

		return height;

	}

	public int getBitPerPixel() {

		return bitPerPixel;

	}

	public Map<String, String> getMetaData(){

		return metaData;

	}

//**************************** METHODS *****************************/

	private void readSuffix(){

		String path = imageUri.getPath();

		String suffix = path.substring(StringUtils.lastIndexOf(path, '.') + 1);

		setSuffix(suffix);

	}

	private void readImageLength() throws ClientProtocolException, IOException, HttpException{

		long length = UriUtils.getResourceLength(imageUri, null); 

		setLength(length);

	}

	/**

	 * Reads the image infos (width, height, bitPerPixel, metadata, format, mime type)

	 * @param timeOut

	 * @throws IOException

	 * @throws HttpException

	 */

	private void readImageInfo(Integer timeOut) throws IOException, HttpException{

		InputStream inputStream;

		try {

			inputStream = UriUtils.getInputStream(imageUri);

			org.apache.sanselan.ImageInfo imageInfo = Sanselan.getImageInfo(inputStream, null);

			setFormatName(imageInfo.getFormatName());

			setMimeType(imageInfo.getMimeType());

			width = imageInfo.getWidth();

			height = imageInfo.getHeight();

			bitPerPixel = imageInfo.getBitsPerPixel();

		} catch (ImageReadException e) {

			logger.error("Could not read: " + imageUri + ". " + e.getMessage());

			throw new IOException(e);

		}	

	}

	public Map<String, String> readMetaData(Integer timeOut) throws IOException, HttpException {

		try {

			InputStream inputStream = UriUtils.getInputStream(imageUri);

			IImageMetadata mediaData;

			mediaData = Sanselan.getMetadata(inputStream, null);

			if (mediaData != null){

				metaData = new HashMap<String, String>();

				for (Object object : mediaData.getItems()){

					Item item = (Item) object;

					if (item.getKeyword().contains("/")){

						String key = item.getKeyword();

						//key.replace("/", "");

						int index = key.indexOf("/");

						key = key.substring(0, index);

						metaData.put(key, item.getText());	

					}else{

						metaData.put(item.getKeyword(), item.getText());						

					}

				}

			}

		} catch (ImageReadException e) {

			logger.error("Could not read: " + imageUri + ". " + e.getMessage());

			throw new IOException(e);

		}

		return metaData;

	}

// ******************* TO STRING **********************************/

	@Override

	public String toString(){

        return getFormatName() + " [" + getMimeType()+ "] w:" + width + " h:" + height + " depth:" + bitPerPixel;

	}

}