| /* |
| * 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 org.xmlpull.v1.XmlPullParser; |
| import org.xmlpull.v1.XmlPullParserException; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| |
| public class ExifXmlReader { |
| |
| private static final String XML_EXIF_TAG = "exif"; |
| private static final String XML_IFD_TAG = "ifd"; |
| private static final String XML_IFD_NAME = "name"; |
| private static final String XML_TAG = "tag"; |
| private static final String XML_IFD0 = "ifd0"; |
| private static final String XML_IFD1 = "ifd1"; |
| private static final String XML_EXIF_IFD = "exif-ifd"; |
| private static final String XML_INTEROPERABILITY_IFD = "interoperability-ifd"; |
| private static final String XML_TAG_ID = "id"; |
| |
| public static void readXml(XmlPullParser parser, HashMap<Short, String> ifd0, |
| HashMap<Short, String> ifd1, HashMap<Short, String> exifIfd, |
| HashMap<Short, String> interoperabilityIfd) throws XmlPullParserException, |
| IOException { |
| |
| while (parser.next() != XmlPullParser.END_DOCUMENT) { |
| if (parser.getEventType() == XmlPullParser.START_TAG) { |
| break; |
| } |
| } |
| |
| assert(parser.getName().equals(XML_EXIF_TAG)); |
| |
| parser.require(XmlPullParser.START_TAG, null, XML_EXIF_TAG); |
| while (parser.next() != XmlPullParser.END_TAG) { |
| if (parser.getEventType() == XmlPullParser.START_TAG) { |
| readXmlIfd(parser, ifd0, ifd1, exifIfd, interoperabilityIfd); |
| } |
| } |
| parser.require(XmlPullParser.END_TAG, null, XML_EXIF_TAG); |
| } |
| |
| private static void readXmlIfd(XmlPullParser parser, HashMap<Short, String> ifd0, |
| HashMap<Short, String> ifd1, HashMap<Short, String> exifIfd, |
| HashMap<Short, String> interoperabilityIfd) throws XmlPullParserException, |
| IOException { |
| parser.require(XmlPullParser.START_TAG, null, XML_IFD_TAG); |
| String name = parser.getAttributeValue(null, XML_IFD_NAME); |
| HashMap<Short, String> ifdData = null; |
| if (XML_IFD0.equals(name)) { |
| ifdData = ifd0; |
| } else if (XML_IFD1.equals(name)) { |
| ifdData = ifd1; |
| } else if (XML_EXIF_IFD.equals(name)) { |
| ifdData = exifIfd; |
| } else if (XML_INTEROPERABILITY_IFD.equals(name)) { |
| ifdData = interoperabilityIfd; |
| } else { |
| throw new RuntimeException("Unknown IFD name in xml file: " + name); |
| } |
| while (parser.next() != XmlPullParser.END_TAG) { |
| if (parser.getEventType() == XmlPullParser.START_TAG) { |
| readXmlTag(parser, ifdData); |
| } |
| } |
| parser.require(XmlPullParser.END_TAG, null, XML_IFD_TAG); |
| } |
| |
| private static void readXmlTag(XmlPullParser parser, HashMap<Short, String> data) |
| throws XmlPullParserException, IOException { |
| parser.require(XmlPullParser.START_TAG, null, XML_TAG); |
| short id = Integer.decode(parser.getAttributeValue(null, XML_TAG_ID)).shortValue(); |
| String value = ""; |
| if (parser.next() == XmlPullParser.TEXT) { |
| value = parser.getText(); |
| parser.next(); |
| } |
| data.put(id, value); |
| parser.require(XmlPullParser.END_TAG, null, XML_TAG); |
| } |
| } |