| /* |
| * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package com.sun.beans.decoder; |
| |
| import com.sun.beans.finder.MethodFinder; |
| |
| import java.lang.reflect.Method; |
| |
| import sun.reflect.misc.MethodUtil; |
| |
| /** |
| * This class is intended to handle <method> element. |
| * It describes invocation of the method. |
| * The {@code name} attribute denotes |
| * the name of the method to invoke. |
| * If the {@code class} attribute is specified |
| * this element invokes static method of specified class. |
| * The inner elements specifies the arguments of the method. |
| * For example:<pre> |
| * <method name="valueOf" class="java.lang.Long"> |
| * <string>10</string> |
| * </method></pre> |
| * is equivalent to {@code Long.valueOf("10")} in Java code. |
| * <p>The following attributes are supported: |
| * <dl> |
| * <dt>name |
| * <dd>the method name |
| * <dt>class |
| * <dd>the type of object for instantiation |
| * <dt>id |
| * <dd>the identifier of the variable that is intended to store the result |
| * </dl> |
| * |
| * @since 1.7 |
| * |
| * @author Sergey A. Malenkov |
| */ |
| final class MethodElementHandler extends NewElementHandler { |
| private String name; |
| |
| /** |
| * Parses attributes of the element. |
| * The following attributes are supported: |
| * <dl> |
| * <dt>name |
| * <dd>the method name |
| * <dt>class |
| * <dd>the type of object for instantiation |
| * <dt>id |
| * <dd>the identifier of the variable that is intended to store the result |
| * </dl> |
| * |
| * @param name the attribute name |
| * @param value the attribute value |
| */ |
| @Override |
| public void addAttribute(String name, String value) { |
| if (name.equals("name")) { // NON-NLS: the attribute name |
| this.name = value; |
| } else { |
| super.addAttribute(name, value); |
| } |
| } |
| |
| /** |
| * Returns the result of method execution. |
| * |
| * @param type the base class |
| * @param args the array of arguments |
| * @return the value of this element |
| * @throws Exception if calculation is failed |
| */ |
| @Override |
| protected ValueObject getValueObject(Class<?> type, Object[] args) throws Exception { |
| Object bean = getContextBean(); |
| Class<?>[] types = getArgumentTypes(args); |
| Method method = (type != null) |
| ? MethodFinder.findStaticMethod(type, this.name, types) |
| : MethodFinder.findMethod(bean.getClass(), this.name, types); |
| |
| if (method.isVarArgs()) { |
| args = getArguments(args, method.getParameterTypes()); |
| } |
| Object value = MethodUtil.invoke(method, bean, args); |
| return method.getReturnType().equals(void.class) |
| ? ValueObjectImpl.VOID |
| : ValueObjectImpl.create(value); |
| } |
| } |