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Commons Beanutils example source code file (ClassConverter.java)
The Commons Beanutils ClassConverter.java source code/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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 org.apache.commons.beanutils.converters; /** * {@link org.apache.commons.beanutils.Converter} implementaion that handles conversion * to and from <b>java.lang.Class objects. * <p> * The class will be loaded from the thread context class * loader (if it exists); otherwise the class loader that loaded this class * will be used. * <p> * Can be configured to either return a <i>default value or throw a * <code>ConversionException if a conversion error occurs. * * @author Tomas Viberg * @version $Revision: 690380 $ $Date: 2008-08-29 21:04:38 +0100 (Fri, 29 Aug 2008) $ * @since 1.4 */ public final class ClassConverter extends AbstractConverter { /** * Construct a <b>java.lang.Class Converter that throws * a <code>ConversionException if an error occurs. */ public ClassConverter() { super(); } /** * Construct a <b>java.lang.Class Converter that returns * a default value if an error occurs. * * @param defaultValue The default value to be returned * if the value to be converted is missing or an error * occurs converting the value. */ public ClassConverter(Object defaultValue) { super(defaultValue); } /** * Return the default type this <code>Converter handles. * * @return The default type this <code>Converter handles. * @since 1.8.0 */ protected Class getDefaultType() { return Class.class; } /** * <p>Convert a java.lang.Class or object into a String. * * @param value The input value to be converted * @return the converted String value. * @since 1.8.0 */ protected String convertToString(Object value) { return (value instanceof Class) ? ((Class)value).getName() : value.toString(); } /** * <p>Convert the input object into a java.lang.Class. * * @param type Data type to which this value should be converted. * @param value The input value to be converted. * @return The converted value. * @throws Throwable if an error occurs converting to the specified type * @since 1.8.0 */ protected Object convertToType(Class type, Object value) throws Throwable { ClassLoader classLoader = Thread.currentThread().getContextClassLoader(); if (classLoader != null) { try { return (classLoader.loadClass(value.toString())); } catch (ClassNotFoundException ex) { // Don't fail, carry on and try this class's class loader // (see issue# BEANUTILS-263) } } // Try this class's class loader classLoader = ClassConverter.class.getClassLoader(); return (classLoader.loadClass(value.toString())); } } Other Commons Beanutils examples (source code examples)Here is a short list of links related to this Commons Beanutils ClassConverter.java source code file: |
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