| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2002 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowlegement: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowlegement may appear in the software itself, |
| * if and wherever such third-party acknowlegements normally appear. |
| * |
| * 4. The names "The Jakarta Project", "Ant", and "Apache Software |
| * Foundation" must not be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache" |
| * nor may "Apache" appear in their names without prior written |
| * permission of the Apache Group. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package org.apache.ant.antcore.execution; |
| import java.lang.reflect.Method; |
| import java.util.Map; |
| |
| /** |
| * Introspects a class and builds a reflector for setting values on |
| * instances of the class |
| * |
| * @author <a href="mailto:conor@apache.org">Conor MacNeill</a> |
| * @created 19 January 2002 |
| */ |
| public class ClassIntrospector { |
| /** The reflector that this introspector populates */ |
| private Reflector reflector; |
| |
| /** |
| * Create a introspector for the bean |
| * |
| * @param bean the class which is introspected |
| * @param converters a collection of converters for converting values |
| * from strings |
| */ |
| public ClassIntrospector(final Class bean, Map converters) { |
| reflector = new Reflector(); |
| |
| Method[] methods = bean.getMethods(); |
| for (int i = 0; i < methods.length; i++) { |
| final Method m = methods[i]; |
| final String name = m.getName(); |
| Class returnType = m.getReturnType(); |
| Class[] args = m.getParameterTypes(); |
| |
| if (name.equals("addText") |
| && returnType.equals(Void.TYPE) |
| && args.length == 1 |
| && args[0].equals(String.class)) { |
| reflector.setAddTextMethod(m); |
| } else if (name.startsWith("set") |
| && name.length() > 3 |
| && returnType.equals(Void.TYPE) |
| && args.length == 1 |
| && !args[0].isArray()) { |
| reflector.addAttributeMethod(m, getPropertyName(name, "set"), |
| converters); |
| } else if (name.startsWith("addConfigured") |
| && name.length() > 13 |
| && returnType.equals(Void.TYPE) |
| && args.length == 1 |
| && !args[0].equals(String.class) |
| && !args[0].isArray() |
| && !args[0].isPrimitive()) { |
| reflector.addElementMethod(m, |
| getPropertyName(name, "addConfigured")); |
| } else if (name.startsWith("add") |
| && name.length() > 3 |
| && returnType.equals(Void.TYPE) |
| && args.length == 1 |
| && !args[0].equals(String.class) |
| && !args[0].isArray() |
| && !args[0].isPrimitive()) { |
| reflector.addElementMethod(m, getPropertyName(name, "add")); |
| } else if (name.startsWith("create") |
| && name.length() > 6 |
| && !returnType.isArray() |
| && !returnType.isPrimitive() |
| && args.length == 0) { |
| reflector.addCreateMethod(m, getPropertyName(name, "create")); |
| } |
| } |
| } |
| |
| /** |
| * Gets the reflector associed with the class we are introspecting |
| * |
| * @return the reflector |
| */ |
| public Reflector getReflector() { |
| return reflector; |
| } |
| |
| /** |
| * extract the name of a property from a method name - subtracting a |
| * given prefix. |
| * |
| * @param methodName the name of the method |
| * @param prefix the prefix to be ignored |
| * @return the property name |
| */ |
| private String getPropertyName(String methodName, String prefix) { |
| int start = prefix.length(); |
| return methodName.substring(start).toLowerCase(); |
| } |
| } |
| |