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Commons Beanutils example source code file (StringConverter.java)

This example Commons Beanutils source code file (StringConverter.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Beanutils tags/keywords

abstractconverter, abstractconverter, class, class, object, object, stringconverter, stringconverter, throwable

The Commons Beanutils StringConverter.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}
 * implementation that converts an incoming
 * object into a <code>java.lang.String object.
 * <p>
 * Note that ConvertUtils really is designed to do string->object conversions,
 * and offers very little support for object->string conversions. The
 * ConvertUtils/ConvertUtilsBean methods only select a converter to apply
 * based upon the target type being converted to, and generally assume that
 * the input is a string (by calling its toString method if needed).
 * <p>
 * This class is therefore just a dummy converter that converts its input
 * into a string by calling the input object's toString method and returning
 * that value.
 * <p>
 * It is possible to replace this converter with something that has a big
 * if/else statement that selects behaviour based on the real type of the
 * object being converted (or possibly has a map of converters, and looks
 * them up based on the class of the input object). However this is not part
 * of the existing ConvertUtils framework.
 *  
 *
 * @author Craig R. McClanahan
 * @version $Revision: 690380 $ $Date: 2008-08-29 21:04:38 +0100 (Fri, 29 Aug 2008) $
 * @since 1.3
 */
public final class StringConverter extends AbstractConverter {


    /**
     * Construct a <b>java.lang.String Converter that throws
     * a <code>ConversionException if an error occurs.
     */
    public StringConverter() {
        super();
    }

    /**
     * Construct a <b>java.lang.String 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 StringConverter(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 String.class;
    }

    /**
     * Convert the specified input object into an output object of the
     * specified type.
     *
     * @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 {
        return value.toString();
    }


}

Other Commons Beanutils examples (source code examples)

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