| /* |
| * $Id$ |
| * |
| * 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.struts2.views.gxp; |
| |
| import com.google.gxp.html.HtmlClosure; |
| |
| import java.lang.reflect.Method; |
| |
| /** |
| * @author Bob Lee |
| */ |
| public class Param { |
| |
| public static final String BODY_PARAM_NAME = "body"; |
| |
| String name; |
| Class type; |
| Class gxpClass; |
| boolean optional; |
| Object defaultValue; |
| |
| Param(Class gxpClass, String name, Class type) { |
| this.gxpClass = gxpClass; |
| this.name = name; |
| this.type = type; |
| |
| // if you specify a default parameter value in a GXP, a getDefaultXxx() |
| // method will be present. |
| try { |
| Method defaultGetter = gxpClass.getMethod("getDefault" + capitalize(name)); |
| this.defaultValue = defaultGetter.invoke(null); |
| this.optional = true; |
| } catch (NoSuchMethodException ignored) { |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| private static String capitalize(String s) { |
| if (s.isEmpty()) { |
| return s; |
| } |
| char first = s.charAt(0); |
| char capitalized = Character.toUpperCase(first); |
| return (first == capitalized) ? s : capitalized + s.substring(1); |
| } |
| |
| public String getName() { |
| return name; |
| } |
| |
| public Class getType() { |
| return type; |
| } |
| |
| boolean isBody() { |
| return name.equals(BODY_PARAM_NAME) && type.equals(HtmlClosure.class); |
| } |
| |
| public String toString() { |
| return "Param[name: " + name |
| + ", type: " + type.getName() |
| + ", optional: " + optional |
| + (optional ? ", defaultValue: " + defaultValue : "") |
| + "]"; |
| } |
| |
| public boolean isOptional() { |
| return optional; |
| } |
| |
| public Object getDefaultValue() { |
| if (!optional) |
| throw new RuntimeException("Parameter '" + name + "' in " + gxpClass.getName() + " is not optional."); |
| return defaultValue; |
| } |
| |
| } |