/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.sanselan.formats.jpeg;
import java.io.IOException;
import java.util.ArrayList;
import org.apache.sanselan.ImageReadException;
import org.apache.sanselan.Sanselan;
import org.apache.sanselan.common.IImageMetadata;
import org.apache.sanselan.formats.tiff.TiffField;
import org.apache.sanselan.formats.tiff.TiffImageData;
import org.apache.sanselan.formats.tiff.TiffImageMetadata;
import org.apache.sanselan.formats.tiff.constants.TagInfo;
import org.apache.sanselan.util.Debug;
import com.google.code.appengine.awt.Dimension;
import com.google.code.appengine.awt.image.BufferedImage;
public class JpegImageMetadata implements IImageMetadata {
private final JpegPhotoshopMetadata photoshop;
private final TiffImageMetadata exif;
public JpegImageMetadata(final JpegPhotoshopMetadata photoshop,
final TiffImageMetadata exif) {
this.photoshop = photoshop;
this.exif = exif;
}
public TiffImageMetadata getExif() {
return exif;
}
public JpegPhotoshopMetadata getPhotoshop() {
return photoshop;
}
public TiffField findEXIFValue(TagInfo tagInfo) {
TiffField field = findEXIFValue(tagInfo, true);
if (field == null) {
// In some cases, we want an exact directory match (such as GPS values).
// In other cases, we are more permissive (ie. with tags that may appear
// in a number of different directories, depending on the camera manufacturer, etc.
// TODO: Modify TagInfo class to include a "permissive/exact" flag.
field = findEXIFValue(tagInfo, false);
}
return field;
}
public TiffField findEXIFValueWithExactMatch(TagInfo tagInfo) {
return findEXIFValue(tagInfo, true);
}
private TiffField findEXIFValue(TagInfo tagInfo, boolean requireDirectoryMatch) {
ArrayList items = getItems();
for (int i = 0; i < items.size(); i++) {
Object o = items.get(i);
if (!(o instanceof TiffImageMetadata.Item))
continue;
TiffImageMetadata.Item item = (TiffImageMetadata.Item) o;
TiffField field = item.getTiffField();
if (requireDirectoryMatch &&
(field.directoryType != tagInfo.directoryType.directoryType)) {
continue;
}
if (field.tag == tagInfo.tag)
return field;
}
return null;
}
/**
* Returns the size of the first JPEG thumbnail found in the EXIF metadata.
*
* @return Thumbnail width and height or null if no thumbnail.
* @throws ImageReadException
* @throws IOException
*/
public Dimension getEXIFThumbnailSize() throws ImageReadException, IOException {
byte[] data = getEXIFThumbnailData();
if( data != null ){
return Sanselan.getImageSize(data);
}
return null;
}
/**
* Returns the data of the first JPEG thumbnail found in the EXIF metadata.
*
* @return JPEG data or null if no thumbnail.
* @throws ImageReadException
* @throws IOException
*/
public byte[] getEXIFThumbnailData() throws ImageReadException, IOException {
ArrayList dirs = exif.getDirectories();
for (int i = 0; i < dirs.size(); i++) {
TiffImageMetadata.Directory dir = (TiffImageMetadata.Directory) dirs
.get(i);
byte[] data = null;
if( dir.getJpegImageData() != null ){
data = dir.getJpegImageData().data;
}
// Support other image formats here.
if( data != null ){
return data;
}
}
return null;
}
/**
* Get the thumbnail image if available.
*
* @return the thumbnail image.
* May be <code>null</code> if no image could be found.
* @throws ImageReadException
* @throws IOException
*/
public BufferedImage getEXIFThumbnail() throws ImageReadException,
IOException {
if (exif == null) {
return null;
}
ArrayList dirs = exif.getDirectories();
for (int i = 0; i < dirs.size(); i++) {
TiffImageMetadata.Directory dir = (TiffImageMetadata.Directory) dirs
.get(i);
// Debug.debug("dir", dir);
BufferedImage image = dir.getThumbnail();
if (null != image) {
return image;
}
// JpegImageData jpegImageData = dir.getJpegImageData();
// if (jpegImageData != null) {
// ByteArrayInputStream input = new ByteArrayInputStream(jpegImageData.data);
// // JPEG thumbnail as JPEG or other format; try to parse.
// image = ImageIO.read(input);
// if (image != null) {
// return image;
// }
// }
}
return null;
}
public TiffImageData getRawImageData() {
ArrayList dirs = exif.getDirectories();
for (int i = 0; i < dirs.size(); i++) {
TiffImageMetadata.Directory dir = (TiffImageMetadata.Directory) dirs
.get(i);
// Debug.debug("dir", dir);
TiffImageData rawImageData = dir.getTiffImageData();
if (null != rawImageData)
return rawImageData;
}
return null;
}
public ArrayList getItems() {
ArrayList result = new ArrayList();
if (null != exif)
result.addAll(exif.getItems());
if (null != photoshop)
result.addAll(photoshop.getItems());
return result;
}
private static final String newline = System.getProperty("line.separator");
public String toString() {
return toString(null);
}
public String toString(String prefix) {
if (prefix == null)
prefix = "";
StringBuffer result = new StringBuffer();
result.append(prefix);
if (null == exif)
result.append("No Exif metadata.");
else {
result.append("Exif metadata:");
result.append(newline);
result.append(exif.toString("\t"));
}
// if (null != exif && null != photoshop)
result.append(newline);
result.append(prefix);
if (null == photoshop)
result.append("No Photoshop (IPTC) metadata.");
else {
result.append("Photoshop (IPTC) metadata:");
result.append(newline);
result.append(photoshop.toString("\t"));
}
return result.toString();
}
public void dump() {
Debug.debug(this.toString());
}
}