239 lines
9.3 KiB
Java
239 lines
9.3 KiB
Java
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.voicemail.impl.utils;
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import android.util.ArrayMap;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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import org.xmlpull.v1.XmlPullParser;
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import org.xmlpull.v1.XmlPullParserException;
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public class XmlUtils {
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public static final ArrayMap<String, ?> readThisArrayMapXml(
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XmlPullParser parser, String endTag, String[] name, ReadMapCallback callback)
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throws XmlPullParserException, java.io.IOException {
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ArrayMap<String, Object> map = new ArrayMap<>();
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int eventType = parser.getEventType();
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do {
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if (eventType == XmlPullParser.START_TAG) {
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Object val = readThisValueXml(parser, name, callback, true);
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map.put(name[0], val);
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} else if (eventType == XmlPullParser.END_TAG) {
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if (parser.getName().equals(endTag)) {
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return map;
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}
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throw new XmlPullParserException("Expected " + endTag + " end tag at: " + parser.getName());
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}
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eventType = parser.next();
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} while (eventType != XmlPullParser.END_DOCUMENT);
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throw new XmlPullParserException("Document ended before " + endTag + " end tag");
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}
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/**
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* Read an ArrayList object from an XmlPullParser. The XML data could previously have been
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* generated by writeListXml(). The XmlPullParser must be positioned <em>after</em> the tag that
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* begins the list.
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*
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* @param parser The XmlPullParser from which to read the list data.
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* @param endTag Name of the tag that will end the list, usually "list".
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* @param name An array of one string, used to return the name attribute of the list's tag.
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* @return HashMap The newly generated list.
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*/
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public static final ArrayList readThisListXml(
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XmlPullParser parser,
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String endTag,
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String[] name,
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ReadMapCallback callback,
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boolean arrayMap)
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throws XmlPullParserException, java.io.IOException {
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ArrayList list = new ArrayList();
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int eventType = parser.getEventType();
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do {
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if (eventType == XmlPullParser.START_TAG) {
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Object val = readThisValueXml(parser, name, callback, arrayMap);
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list.add(val);
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} else if (eventType == XmlPullParser.END_TAG) {
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if (parser.getName().equals(endTag)) {
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return list;
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}
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throw new XmlPullParserException("Expected " + endTag + " end tag at: " + parser.getName());
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}
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eventType = parser.next();
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} while (eventType != XmlPullParser.END_DOCUMENT);
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throw new XmlPullParserException("Document ended before " + endTag + " end tag");
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}
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/**
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* Read a String[] object from an XmlPullParser. The XML data could previously have been generated
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* by writeStringArrayXml(). The XmlPullParser must be positioned <em>after</em> the tag that
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* begins the list.
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*
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* @param parser The XmlPullParser from which to read the list data.
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* @param endTag Name of the tag that will end the list, usually "string-array".
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* @param name An array of one string, used to return the name attribute of the list's tag.
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* @return Returns a newly generated String[].
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*/
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public static String[] readThisStringArrayXml(XmlPullParser parser, String endTag, String[] name)
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throws XmlPullParserException, java.io.IOException {
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parser.next();
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List<String> array = new ArrayList<>();
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int eventType = parser.getEventType();
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do {
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if (eventType == XmlPullParser.START_TAG) {
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if (parser.getName().equals("item")) {
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try {
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array.add(parser.getAttributeValue(null, "value"));
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} catch (NullPointerException e) {
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throw new XmlPullParserException("Need value attribute in item");
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} catch (NumberFormatException e) {
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throw new XmlPullParserException("Not a number in value attribute in item");
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}
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} else {
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throw new XmlPullParserException("Expected item tag at: " + parser.getName());
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}
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} else if (eventType == XmlPullParser.END_TAG) {
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if (parser.getName().equals(endTag)) {
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return array.toArray(new String[0]);
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} else if (parser.getName().equals("item")) {
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} else {
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throw new XmlPullParserException(
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"Expected " + endTag + " end tag at: " + parser.getName());
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}
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}
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eventType = parser.next();
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} while (eventType != XmlPullParser.END_DOCUMENT);
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throw new XmlPullParserException("Document ended before " + endTag + " end tag");
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}
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private static Object readThisValueXml(
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XmlPullParser parser, String[] name, ReadMapCallback callback, boolean arrayMap)
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throws XmlPullParserException, java.io.IOException {
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final String valueName = parser.getAttributeValue(null, "name");
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final String tagName = parser.getName();
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Object res;
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if (tagName.equals("null")) {
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res = null;
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} else if (tagName.equals("string")) {
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String value = "";
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int eventType;
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while ((eventType = parser.next()) != XmlPullParser.END_DOCUMENT) {
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if (eventType == XmlPullParser.END_TAG) {
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if (parser.getName().equals("string")) {
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name[0] = valueName;
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return value;
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}
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throw new XmlPullParserException("Unexpected end tag in <string>: " + parser.getName());
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} else if (eventType == XmlPullParser.TEXT) {
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value += parser.getText();
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} else if (eventType == XmlPullParser.START_TAG) {
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throw new XmlPullParserException("Unexpected start tag in <string>: " + parser.getName());
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}
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}
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throw new XmlPullParserException("Unexpected end of document in <string>");
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} else if ((res = readThisPrimitiveValueXml(parser, tagName)) != null) {
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// all work already done by readThisPrimitiveValueXml
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} else if (tagName.equals("string-array")) {
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res = readThisStringArrayXml(parser, "string-array", name);
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name[0] = valueName;
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return res;
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} else if (tagName.equals("list")) {
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parser.next();
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res = readThisListXml(parser, "list", name, callback, arrayMap);
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name[0] = valueName;
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return res;
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} else if (callback != null) {
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res = callback.readThisUnknownObjectXml(parser, tagName);
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name[0] = valueName;
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return res;
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} else {
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throw new XmlPullParserException("Unknown tag: " + tagName);
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}
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// Skip through to end tag.
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int eventType;
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while ((eventType = parser.next()) != XmlPullParser.END_DOCUMENT) {
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if (eventType == XmlPullParser.END_TAG) {
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if (parser.getName().equals(tagName)) {
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name[0] = valueName;
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return res;
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}
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throw new XmlPullParserException(
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"Unexpected end tag in <" + tagName + ">: " + parser.getName());
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} else if (eventType == XmlPullParser.TEXT) {
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throw new XmlPullParserException(
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"Unexpected text in <" + tagName + ">: " + parser.getName());
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} else if (eventType == XmlPullParser.START_TAG) {
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throw new XmlPullParserException(
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"Unexpected start tag in <" + tagName + ">: " + parser.getName());
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}
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}
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throw new XmlPullParserException("Unexpected end of document in <" + tagName + ">");
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}
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private static final Object readThisPrimitiveValueXml(XmlPullParser parser, String tagName)
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throws XmlPullParserException, java.io.IOException {
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try {
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if (tagName.equals("int")) {
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return Integer.parseInt(parser.getAttributeValue(null, "value"));
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} else if (tagName.equals("long")) {
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return Long.valueOf(parser.getAttributeValue(null, "value"));
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} else if (tagName.equals("float")) {
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return Float.valueOf(parser.getAttributeValue(null, "value"));
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} else if (tagName.equals("double")) {
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return Double.valueOf(parser.getAttributeValue(null, "value"));
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} else if (tagName.equals("boolean")) {
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return Boolean.valueOf(parser.getAttributeValue(null, "value"));
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} else {
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return null;
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}
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} catch (NullPointerException e) {
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throw new XmlPullParserException("Need value attribute in <" + tagName + ">");
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} catch (NumberFormatException e) {
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throw new XmlPullParserException("Not a number in value attribute in <" + tagName + ">");
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}
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}
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public interface ReadMapCallback {
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/**
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* Called from readThisMapXml when a START_TAG is not recognized. The input stream is positioned
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* within the start tag so that attributes can be read using in.getAttribute.
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*
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* @param in the XML input stream
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* @param tag the START_TAG that was not recognized.
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* @return the Object parsed from the stream which will be put into the map.
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* @throws XmlPullParserException if the START_TAG is not recognized.
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* @throws IOException on XmlPullParser serialization errors.
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*/
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Object readThisUnknownObjectXml(XmlPullParser in, String tag)
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throws XmlPullParserException, IOException;
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}
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}
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