2019-05-06 22:06:13 +02:00
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/**
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*
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* Copyright 2019 Florian Schmaus
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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 org.jivesoftware.smack.test.util;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.Reader;
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import java.io.StringReader;
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import java.lang.reflect.InvocationTargetException;
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import java.nio.charset.StandardCharsets;
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import java.util.function.Predicate;
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import javax.xml.namespace.QName;
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import org.jivesoftware.smack.packet.Element;
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import org.jivesoftware.smack.parsing.SmackParsingException;
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import org.jivesoftware.smack.provider.Provider;
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import org.jivesoftware.smack.xml.XmlPullParser;
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import org.jivesoftware.smack.xml.XmlPullParserException;
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import org.jivesoftware.smack.xml.XmlPullParserFactory;
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import org.jivesoftware.smack.xml.stax.StaxXmlPullParserFactory;
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import org.jivesoftware.smack.xml.xpp3.Xpp3XmlPullParserFactory;
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public class SmackTestUtil {
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@SuppressWarnings("ImmutableEnumChecker")
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public enum XmlPullParserKind {
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StAX(StaxXmlPullParserFactory.class),
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XPP3(Xpp3XmlPullParserFactory.class),
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;
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public final XmlPullParserFactory factory;
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XmlPullParserKind(Class<? extends XmlPullParserFactory> factoryClass) {
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try {
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factory = factoryClass.getDeclaredConstructor().newInstance();
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}
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catch (InstantiationException | IllegalAccessException | IllegalArgumentException
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| InvocationTargetException | NoSuchMethodException | SecurityException e) {
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throw new AssertionError(e);
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}
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}
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}
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public static <E extends Element, P extends Provider<E>> E parse(CharSequence xml, Class<P> providerClass, XmlPullParserKind parserKind)
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throws XmlPullParserException, IOException, SmackParsingException {
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P provider = providerClassToProvider(providerClass);
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return parse(xml, provider, parserKind);
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}
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public static <E extends Element, P extends Provider<E>> E parse(InputStream inputStream, Class<P> providerClass, XmlPullParserKind parserKind)
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throws XmlPullParserException, IOException, SmackParsingException {
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P provider = providerClassToProvider(providerClass);
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return parse(inputStream, provider, parserKind);
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}
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public static <E extends Element, P extends Provider<E>> E parse(Reader reader, Class<P> providerClass, XmlPullParserKind parserKind)
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throws XmlPullParserException, IOException, SmackParsingException {
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P provider = providerClassToProvider(providerClass);
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return parse(reader, provider, parserKind);
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}
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public static <E extends Element> E parse(CharSequence xml, Provider<E> provider, XmlPullParserKind parserKind)
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throws XmlPullParserException, IOException, SmackParsingException {
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String xmlString = xml.toString();
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Reader reader = new StringReader(xmlString);
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return parse(reader, provider, parserKind);
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}
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public static <E extends Element> E parse(InputStream inputStream, Provider<E> provider, XmlPullParserKind parserKind)
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throws XmlPullParserException, IOException, SmackParsingException {
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InputStreamReader inputStreamReader = new InputStreamReader(inputStream, StandardCharsets.UTF_8);
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return parse(inputStreamReader, provider, parserKind);
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}
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public static <E extends Element> E parse(Reader reader, Provider<E> provider, XmlPullParserKind parserKind)
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throws XmlPullParserException, IOException, SmackParsingException {
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XmlPullParser parser = getParserFor(reader, parserKind);
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E element = provider.parse(parser);
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return element;
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}
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public static XmlPullParser getParserFor(String xml, XmlPullParserKind parserKind) throws XmlPullParserException, IOException {
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Reader reader = new StringReader(xml);
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return getParserFor(reader, parserKind);
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}
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public static XmlPullParser getParserFor(InputStream inputStream, XmlPullParserKind parserKind) throws XmlPullParserException, IOException {
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InputStreamReader inputStreamReader = new InputStreamReader(inputStream, StandardCharsets.UTF_8);
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return getParserFor(inputStreamReader, parserKind);
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}
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public static XmlPullParser getParserFor(Reader reader, XmlPullParserKind parserKind) throws XmlPullParserException, IOException {
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XmlPullParser parser = parserKind.factory.newXmlPullParser(reader);
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forwardParserToStartElement(parser);
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return parser;
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}
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public static XmlPullParser getParserFor(String xml, QName startTagQName, XmlPullParserKind parserKind)
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throws XmlPullParserException, IOException {
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XmlPullParser parser = getParserFor(xml, parserKind);
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2019-07-24 09:18:39 +02:00
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forwardParserToStartElement(parser, p -> p.getQName().equals(startTagQName));
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2019-05-06 22:06:13 +02:00
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return parser;
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}
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public static XmlPullParser getParserFor(String xml, String startTagLocalpart, XmlPullParserKind parserKind)
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throws XmlPullParserException, IOException {
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XmlPullParser parser = getParserFor(xml, parserKind);
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2019-07-24 09:18:39 +02:00
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forwardParserToStartElement(parser, p -> p.getName().equals(startTagLocalpart));
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2019-05-06 22:06:13 +02:00
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return parser;
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}
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private static <E extends Element, P extends Provider<E>> P providerClassToProvider(Class<P> providerClass) {
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P provider;
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// TODO: Consider adding a shortcut in case there is a static INSTANCE field holding an instance of the
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// requested provider.
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try {
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provider = providerClass.getDeclaredConstructor().newInstance();
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}
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catch (InstantiationException | IllegalAccessException | IllegalArgumentException | InvocationTargetException
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| NoSuchMethodException | SecurityException e) {
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throw new AssertionError(e);
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}
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return provider;
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}
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private static void forwardParserToStartElement(XmlPullParser parser) throws XmlPullParserException, IOException {
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forwardParserToStartElement(parser, p -> true);
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}
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private static void forwardParserToStartElement(XmlPullParser parser,
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Predicate<XmlPullParser> doneForwarding) throws XmlPullParserException, IOException {
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outerloop: while (true) {
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XmlPullParser.Event event = parser.getEventType();
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switch (event) {
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case START_ELEMENT:
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if (doneForwarding.test(parser)) {
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break outerloop;
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}
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break;
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case END_DOCUMENT:
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throw new IllegalArgumentException("Not matching START_ELEMENT found");
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default:
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// Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
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break;
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}
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parser.next();
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}
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}
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}
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