001    /**
002     *  Licensed to the Apache Software Foundation (ASF) under one or more
003     *  contributor license agreements.  See the NOTICE file distributed with
004     *  this work for additional information regarding copyright ownership.
005     *  The ASF licenses this file to You under the Apache License, Version 2.0
006     *  (the "License"); you may not use this file except in compliance with
007     *  the License.  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     *  Unless required by applicable law or agreed to in writing, software
012     *  distributed under the License is distributed on an "AS IS" BASIS,
013     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     *  See the License for the specific language governing permissions and
015     *  limitations under the License.
016     */
017    
018    package org.apache.geronimo.common.propertyeditor;
019    
020    import org.apache.geronimo.kernel.ClassLoading;
021    
022    /**
023     * A property editor for converting class names into class object instances
024     *
025     * @version $Rev: 476049 $
026     */
027    public class ClassEditor extends TextPropertyEditorSupport {
028        /**
029         * Return a resolved class using the text value of the property as the name.
030         * The class is loading using the current context class loader, using the resolution
031         * rules defined by ClassLoading.java.
032         *
033         * @return a Class object created from the text value of the name.
034         * @throws PropertyEditorException Unable to resolve the Class object from the name.
035         */
036        public Object getValue() {
037            try {
038                // load this using the current thread's context loader.
039                String className = getAsText().trim();
040                return ClassLoading.loadClass(className, Thread.currentThread().getContextClassLoader());
041            } catch (Exception e) {
042                // not found exceptions are just turned into wrapped property exceptions.
043                throw new PropertyEditorException("Unable to resolve class " + getAsText(), e);
044            }
045        }
046    }