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/*
* Copyright (C) 2016 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.voicemail.impl.utils;
import android.util.ArrayMap;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
public class XmlUtils {
public static final ArrayMap<String, ?> readThisArrayMapXml(
XmlPullParser parser, String endTag, String[] name, ReadMapCallback callback)
throws XmlPullParserException, java.io.IOException {
ArrayMap<String, Object> map = new ArrayMap<>();
int eventType = parser.getEventType();
do {
if (eventType == XmlPullParser.START_TAG) {
Object val = readThisValueXml(parser, name, callback, true);
map.put(name[0], val);
} else if (eventType == XmlPullParser.END_TAG) {
if (parser.getName().equals(endTag)) {
return map;
}
throw new XmlPullParserException("Expected " + endTag + " end tag at: " + parser.getName());
}
eventType = parser.next();
} while (eventType != XmlPullParser.END_DOCUMENT);
throw new XmlPullParserException("Document ended before " + endTag + " end tag");
}
/**
* Read an ArrayList object from an XmlPullParser. The XML data could previously have been
* generated by writeListXml(). The XmlPullParser must be positioned <em>after</em> the tag that
* begins the list.
*
* @param parser The XmlPullParser from which to read the list data.
* @param endTag Name of the tag that will end the list, usually "list".
* @param name An array of one string, used to return the name attribute of the list's tag.
* @return HashMap The newly generated list.
*/
public static final ArrayList readThisListXml(
XmlPullParser parser,
String endTag,
String[] name,
ReadMapCallback callback,
boolean arrayMap)
throws XmlPullParserException, java.io.IOException {
ArrayList list = new ArrayList();
int eventType = parser.getEventType();
do {
if (eventType == XmlPullParser.START_TAG) {
Object val = readThisValueXml(parser, name, callback, arrayMap);
list.add(val);
} else if (eventType == XmlPullParser.END_TAG) {
if (parser.getName().equals(endTag)) {
return list;
}
throw new XmlPullParserException("Expected " + endTag + " end tag at: " + parser.getName());
}
eventType = parser.next();
} while (eventType != XmlPullParser.END_DOCUMENT);
throw new XmlPullParserException("Document ended before " + endTag + " end tag");
}
/**
* Read a String[] object from an XmlPullParser. The XML data could previously have been generated
* by writeStringArrayXml(). The XmlPullParser must be positioned <em>after</em> the tag that
* begins the list.
*
* @param parser The XmlPullParser from which to read the list data.
* @param endTag Name of the tag that will end the list, usually "string-array".
* @param name An array of one string, used to return the name attribute of the list's tag.
* @return Returns a newly generated String[].
*/
public static String[] readThisStringArrayXml(XmlPullParser parser, String endTag, String[] name)
throws XmlPullParserException, java.io.IOException {
parser.next();
List<String> array = new ArrayList<>();
int eventType = parser.getEventType();
do {
if (eventType == XmlPullParser.START_TAG) {
if (parser.getName().equals("item")) {
try {
array.add(parser.getAttributeValue(null, "value"));
} catch (NullPointerException e) {
throw new XmlPullParserException("Need value attribute in item");
} catch (NumberFormatException e) {
throw new XmlPullParserException("Not a number in value attribute in item");
}
} else {
throw new XmlPullParserException("Expected item tag at: " + parser.getName());
}
} else if (eventType == XmlPullParser.END_TAG) {
if (parser.getName().equals(endTag)) {
return array.toArray(new String[0]);
} else if (parser.getName().equals("item")) {
} else {
throw new XmlPullParserException(
"Expected " + endTag + " end tag at: " + parser.getName());
}
}
eventType = parser.next();
} while (eventType != XmlPullParser.END_DOCUMENT);
throw new XmlPullParserException("Document ended before " + endTag + " end tag");
}
private static Object readThisValueXml(
XmlPullParser parser, String[] name, ReadMapCallback callback, boolean arrayMap)
throws XmlPullParserException, java.io.IOException {
final String valueName = parser.getAttributeValue(null, "name");
final String tagName = parser.getName();
Object res;
if (tagName.equals("null")) {
res = null;
} else if (tagName.equals("string")) {
String value = "";
int eventType;
while ((eventType = parser.next()) != XmlPullParser.END_DOCUMENT) {
if (eventType == XmlPullParser.END_TAG) {
if (parser.getName().equals("string")) {
name[0] = valueName;
return value;
}
throw new XmlPullParserException("Unexpected end tag in <string>: " + parser.getName());
} else if (eventType == XmlPullParser.TEXT) {
value += parser.getText();
} else if (eventType == XmlPullParser.START_TAG) {
throw new XmlPullParserException("Unexpected start tag in <string>: " + parser.getName());
}
}
throw new XmlPullParserException("Unexpected end of document in <string>");
} else if ((res = readThisPrimitiveValueXml(parser, tagName)) != null) {
// all work already done by readThisPrimitiveValueXml
} else if (tagName.equals("string-array")) {
res = readThisStringArrayXml(parser, "string-array", name);
name[0] = valueName;
return res;
} else if (tagName.equals("list")) {
parser.next();
res = readThisListXml(parser, "list", name, callback, arrayMap);
name[0] = valueName;
return res;
} else if (callback != null) {
res = callback.readThisUnknownObjectXml(parser, tagName);
name[0] = valueName;
return res;
} else {
throw new XmlPullParserException("Unknown tag: " + tagName);
}
// Skip through to end tag.
int eventType;
while ((eventType = parser.next()) != XmlPullParser.END_DOCUMENT) {
if (eventType == XmlPullParser.END_TAG) {
if (parser.getName().equals(tagName)) {
name[0] = valueName;
return res;
}
throw new XmlPullParserException(
"Unexpected end tag in <" + tagName + ">: " + parser.getName());
} else if (eventType == XmlPullParser.TEXT) {
throw new XmlPullParserException(
"Unexpected text in <" + tagName + ">: " + parser.getName());
} else if (eventType == XmlPullParser.START_TAG) {
throw new XmlPullParserException(
"Unexpected start tag in <" + tagName + ">: " + parser.getName());
}
}
throw new XmlPullParserException("Unexpected end of document in <" + tagName + ">");
}
private static final Object readThisPrimitiveValueXml(XmlPullParser parser, String tagName)
throws XmlPullParserException, java.io.IOException {
try {
if (tagName.equals("int")) {
return Integer.parseInt(parser.getAttributeValue(null, "value"));
} else if (tagName.equals("long")) {
return Long.valueOf(parser.getAttributeValue(null, "value"));
} else if (tagName.equals("float")) {
return Float.valueOf(parser.getAttributeValue(null, "value"));
} else if (tagName.equals("double")) {
return Double.valueOf(parser.getAttributeValue(null, "value"));
} else if (tagName.equals("boolean")) {
return Boolean.valueOf(parser.getAttributeValue(null, "value"));
} else {
return null;
}
} catch (NullPointerException e) {
throw new XmlPullParserException("Need value attribute in <" + tagName + ">");
} catch (NumberFormatException e) {
throw new XmlPullParserException("Not a number in value attribute in <" + tagName + ">");
}
}
public interface ReadMapCallback {
/**
* Called from readThisMapXml when a START_TAG is not recognized. The input stream is positioned
* within the start tag so that attributes can be read using in.getAttribute.
*
* @param in the XML input stream
* @param tag the START_TAG that was not recognized.
* @return the Object parsed from the stream which will be put into the map.
* @throws XmlPullParserException if the START_TAG is not recognized.
* @throws IOException on XmlPullParser serialization errors.
*/
Object readThisUnknownObjectXml(XmlPullParser in, String tag)
throws XmlPullParserException, IOException;
}
}
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