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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed 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 com.android.gallery3d.exif;
import android.content.res.XmlResourceParser;
import android.test.InstrumentationTestCase;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
public class ExifReaderTest extends InstrumentationTestCase {
private static final String TAG = "ExifReaderTest";
private final int mImageResourceId;
private final int mXmlResourceId;
private final HashMap<Short, String> mIfd0Value = new HashMap<Short, String>();
private final HashMap<Short, String> mIfd1Value = new HashMap<Short, String>();
private final HashMap<Short, String> mExifIfdValue = new HashMap<Short, String>();
private final HashMap<Short, String> mInteroperabilityIfdValue = new HashMap<Short, String>();
private InputStream mImageInputStream;
public ExifReaderTest(int imageResourceId, int xmlResourceId) {
mImageResourceId = imageResourceId;
mXmlResourceId = xmlResourceId;
}
@Override
public void setUp() throws Exception {
mImageInputStream = getInstrumentation()
.getContext().getResources().openRawResource(mImageResourceId);
XmlResourceParser parser =
getInstrumentation().getContext().getResources().getXml(mXmlResourceId);
ExifXmlReader.readXml(parser, mIfd0Value, mIfd1Value, mExifIfdValue
, mInteroperabilityIfdValue);
parser.close();
}
public void testRead() throws ExifInvalidFormatException, IOException {
ExifReader reader = new ExifReader();
ExifData exifData = reader.getExifData(mImageInputStream);
checkIfd(exifData, ExifData.TYPE_IFD_0, mIfd0Value);
checkIfd(exifData, ExifData.TYPE_IFD_1, mIfd1Value);
checkIfd(exifData, ExifData.TYPE_IFD_EXIF, mExifIfdValue);
checkIfd(exifData, ExifData.TYPE_IFD_INTEROPERABILITY, mInteroperabilityIfdValue);
}
private void checkIfd(ExifData exifData, int ifdType, HashMap<Short, String> ifdValue)
throws IOException {
IfdData ifd = exifData.getIfdData(ifdType);
if (ifd == null) {
assertEquals(0 ,ifdValue.size());
return;
}
ExifTag[] tags = ifd.getAllTags(new ExifTag[0]);
for (ExifTag tag : tags) {
assertEquals(ifdValue.get(tag.getTagId()), readValueToString(tag, ifd));
}
assertEquals(ifdValue.size(), tags.length);
}
private String readValueToString(ExifTag tag, IfdData ifdData) throws IOException {
StringBuilder sbuilder = new StringBuilder();
switch(tag.getDataType()) {
case ExifTag.TYPE_UNDEFINED:
case ExifTag.TYPE_BYTE:
byte buf[] = new byte[tag.getComponentCount()];
ifdData.getBytes(tag.getTagId(), buf);
for(int i = 0; i < tag.getComponentCount(); i++) {
if(i != 0) sbuilder.append(" ");
sbuilder.append(String.format("%02x", buf[i]));
}
break;
case ExifTag.TYPE_ASCII:
// trim the string for comparison between xml
sbuilder.append(ifdData.getString(tag.getTagId()).trim());
break;
case ExifTag.TYPE_INT:
for(int i = 0; i < tag.getComponentCount(); i++) {
if(i != 0) sbuilder.append(" ");
sbuilder.append(ifdData.getUnsignedInt(tag.getTagId(), i));
}
break;
case ExifTag.TYPE_SRATIONAL:
case ExifTag.TYPE_RATIONAL:
for(int i = 0; i < tag.getComponentCount(); i++) {
Rational r = ifdData.getRational(tag.getTagId(), i);
if(i != 0) sbuilder.append(" ");
sbuilder.append(r.getNominator()).append("/").append(r.getDenominator());
}
break;
case ExifTag.TYPE_SHORT:
for(int i = 0; i < tag.getComponentCount(); i++) {
if(i != 0) sbuilder.append(" ");
sbuilder.append(ifdData.getUnsignedShort(tag.getTagId(), i));
}
break;
case ExifTag.TYPE_SINT:
for(int i = 0; i < tag.getComponentCount(); i++) {
if(i != 0) sbuilder.append(" ");
sbuilder.append(ifdData.getInt(tag.getTagId(), i));
}
break;
}
return sbuilder.toString();
}
@Override
public void tearDown() throws Exception {
mImageInputStream.close();
}
}
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