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https://github.com/vanitasvitae/Smack.git
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4133eb175c
Introducing Smack's own XmlPullParser interface which tries to stay as compatible as possible to XPP3. The interface is used to either wrap StAX's XMLStreamReader if Smack is used on Java SE, and XPP3's XmlPullParser if Smack is used on on Android. Fixes SMACK-591. Also introduce JUnit 5 and non-strict javadoc projects.
150 lines
6 KiB
Java
150 lines
6 KiB
Java
/**
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*
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* Copyright © 2014-2019 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.provider;
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import java.io.IOException;
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import java.lang.reflect.InvocationTargetException;
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import org.jivesoftware.smack.packet.ExtensionElement;
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import org.jivesoftware.smack.packet.IQ;
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import org.jivesoftware.smack.packet.XmlEnvironment;
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import org.jivesoftware.smack.util.ParserUtils;
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import org.jivesoftware.smack.xml.XmlPullParser;
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import org.jivesoftware.smack.xml.XmlPullParserException;
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public class IntrospectionProvider{
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// Unfortunately, we have to create two introspection providers, with the exactly the same code here
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public abstract static class IQIntrospectionProvider<I extends IQ> extends IQProvider<I> {
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private final Class<I> elementClass;
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protected IQIntrospectionProvider(Class<I> elementClass) {
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this.elementClass = elementClass;
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}
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@SuppressWarnings("unchecked")
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@Override
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public I parse(XmlPullParser parser, int initialDepth, XmlEnvironment xmlEnvironment) throws XmlPullParserException, IOException {
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try {
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return (I) parseWithIntrospection(elementClass, parser, initialDepth);
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}
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catch (NoSuchMethodException | SecurityException | InstantiationException | IllegalAccessException
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| IllegalArgumentException | InvocationTargetException | ClassNotFoundException e) {
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// TODO: Should probably be SmackParsingException (once it exists).
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throw new IOException(e);
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}
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}
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}
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public abstract static class PacketExtensionIntrospectionProvider<PE extends ExtensionElement> extends ExtensionElementProvider<PE> {
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private final Class<PE> elementClass;
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protected PacketExtensionIntrospectionProvider(Class<PE> elementClass) {
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this.elementClass = elementClass;
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}
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@SuppressWarnings("unchecked")
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@Override
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public PE parse(XmlPullParser parser, int initialDepth, XmlEnvironment xmlEnvironment) throws XmlPullParserException, IOException {
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try {
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return (PE) parseWithIntrospection(elementClass, parser, initialDepth);
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}
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catch (NoSuchMethodException | SecurityException | InstantiationException | IllegalAccessException
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| IllegalArgumentException | InvocationTargetException | ClassNotFoundException e) {
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// TODO: Should probably be SmackParsingException (once it exists).
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throw new IOException(e);
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}
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}
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}
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public static Object parseWithIntrospection(Class<?> objectClass,
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XmlPullParser parser, final int initialDepth) throws NoSuchMethodException, SecurityException,
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InstantiationException, IllegalAccessException, XmlPullParserException,
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IOException, IllegalArgumentException, InvocationTargetException,
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ClassNotFoundException {
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ParserUtils.assertAtStartTag(parser);
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Object object = objectClass.getConstructor().newInstance();
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outerloop: while (true) {
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XmlPullParser.Event eventType = parser.next();
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switch (eventType) {
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case START_ELEMENT:
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String name = parser.getName();
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String stringValue = parser.nextText();
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Class<?> propertyType = object.getClass().getMethod(
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"get" + Character.toUpperCase(name.charAt(0)) + name.substring(1)).getReturnType();
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// Get the value of the property by converting it from a
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// String to the correct object type.
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Object value = decode(propertyType, stringValue);
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// Set the value of the bean.
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object.getClass().getMethod(
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"set" + Character.toUpperCase(name.charAt(0)) + name.substring(1),
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propertyType).invoke(object, value);
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break;
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case END_ELEMENT:
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if (parser.getDepth() == initialDepth) {
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break outerloop;
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}
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break;
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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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}
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ParserUtils.assertAtEndTag(parser);
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return object;
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}
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/**
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* Decodes a String into an object of the specified type. If the object
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* type is not supported, null will be returned.
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*
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* @param type the type of the property.
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* @param value the encode String value to decode.
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* @return the String value decoded into the specified type.
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* @throws ClassNotFoundException
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*/
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private static Object decode(Class<?> type, String value) throws ClassNotFoundException {
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String name = type.getName();
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switch (name) {
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case "java.lang.String":
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return value;
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case "boolean":
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// CHECKSTYLE:OFF
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return Boolean.valueOf(value);
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// CHECKSTYLE:ON
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case "int":
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return Integer.valueOf(value);
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case "long":
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return Long.valueOf(value);
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case "float":
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return Float.valueOf(value);
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case "double":
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return Double.valueOf(value);
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case "short":
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return Short.valueOf(value);
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case "byte":
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return Byte.valueOf(value);
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case "java.lang.Class":
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return Class.forName(value);
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}
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return null;
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}
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}
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