110 lines
3.9 KiB
Java
110 lines
3.9 KiB
Java
/**
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*
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* Copyright 2019-2021 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.ParameterizedType;
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import java.lang.reflect.Type;
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import java.lang.reflect.TypeVariable;
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import java.text.ParseException;
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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.xml.XmlPullParserException;
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public class AbstractProvider<E extends Element> {
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private final Class<E> elementClass;
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@SuppressWarnings("unchecked")
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protected AbstractProvider() {
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Type currentType = getClass().getGenericSuperclass();
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while (!(currentType instanceof ParameterizedType)) {
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Class<?> currentClass = (Class<?>) currentType;
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currentType = currentClass.getGenericSuperclass();
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}
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ParameterizedType parameterizedGenericSuperclass = (ParameterizedType) currentType;
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Type[] actualTypeArguments = parameterizedGenericSuperclass.getActualTypeArguments();
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Type elementType = actualTypeArguments[0];
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if (elementType instanceof Class) {
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elementClass = (Class<E>) elementType;
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} else if (elementType instanceof ParameterizedType) {
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ParameterizedType parameteriezedElementType = (ParameterizedType) elementType;
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elementClass = (Class<E>) parameteriezedElementType.getRawType();
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} else if (elementType instanceof TypeVariable) {
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TypeVariable<?> typeVariableElementType = (TypeVariable<?>) elementType;
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elementClass = (Class<E>) typeVariableElementType.getClass();
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} else {
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throw new AssertionError("Element type '" + elementType + "' (" + elementType.getClass()
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+ ") is neither of type Class, ParameterizedType or TypeVariable");
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}
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}
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public final Class<E> getElementClass() {
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return elementClass;
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}
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public static final class TextParseException extends SmackParsingException {
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/**
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*
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*/
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private static final long serialVersionUID = 1L;
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private final ParseException parseException;
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private TextParseException(ParseException parseException) {
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super(parseException);
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this.parseException = parseException;
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}
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public ParseException getParseException() {
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return parseException;
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}
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}
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public static final class NumberFormatParseException extends SmackParsingException {
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/**
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*
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*/
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private static final long serialVersionUID = 1L;
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private NumberFormatParseException(NumberFormatException numberFormatException) {
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super(numberFormatException);
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}
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}
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protected interface WrappableParser<E> {
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E parse() throws XmlPullParserException, IOException, SmackParsingException, ParseException;
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}
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protected static <E> E wrapExceptions(WrappableParser<E> parser)
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throws XmlPullParserException, IOException, SmackParsingException {
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E e;
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try {
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e = parser.parse();
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} catch (ParseException parseException) {
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throw new TextParseException(parseException);
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} catch (NumberFormatException numberFormatException) {
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throw new NumberFormatParseException(numberFormatException);
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}
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return e;
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}
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}
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