Jake Slack | 03928ae | 2014-05-13 18:41:56 -0700 | [diff] [blame] | 1 | // |
| 2 | // ======================================================================== |
| 3 | // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| 4 | // ------------------------------------------------------------------------ |
| 5 | // All rights reserved. This program and the accompanying materials |
| 6 | // are made available under the terms of the Eclipse Public License v1.0 |
| 7 | // and Apache License v2.0 which accompanies this distribution. |
| 8 | // |
| 9 | // The Eclipse Public License is available at |
| 10 | // http://www.eclipse.org/legal/epl-v10.html |
| 11 | // |
| 12 | // The Apache License v2.0 is available at |
| 13 | // http://www.opensource.org/licenses/apache2.0.php |
| 14 | // |
| 15 | // You may elect to redistribute this code under either of these licenses. |
| 16 | // ======================================================================== |
| 17 | // |
| 18 | |
| 19 | package org.eclipse.jetty.util.ajax; |
| 20 | |
| 21 | import java.lang.reflect.Method; |
| 22 | import java.lang.reflect.Modifier; |
| 23 | import java.util.Arrays; |
| 24 | import java.util.HashSet; |
| 25 | import java.util.Locale; |
| 26 | import java.util.Map; |
| 27 | import java.util.Set; |
| 28 | |
| 29 | import org.eclipse.jetty.util.ajax.JSON.Output; |
| 30 | |
| 31 | /* ------------------------------------------------------------ */ |
| 32 | /** |
| 33 | * Convert an Object to JSON using reflection on getters methods. |
| 34 | * |
| 35 | * |
| 36 | * |
| 37 | */ |
| 38 | public class JSONObjectConvertor implements JSON.Convertor |
| 39 | { |
| 40 | private boolean _fromJSON; |
| 41 | private Set _excluded=null; |
| 42 | |
| 43 | public JSONObjectConvertor() |
| 44 | { |
| 45 | _fromJSON=false; |
| 46 | } |
| 47 | |
| 48 | public JSONObjectConvertor(boolean fromJSON) |
| 49 | { |
| 50 | _fromJSON=fromJSON; |
| 51 | } |
| 52 | |
| 53 | /* ------------------------------------------------------------ */ |
| 54 | /** |
| 55 | * @param fromJSON |
| 56 | * @param excluded An array of field names to exclude from the conversion |
| 57 | */ |
| 58 | public JSONObjectConvertor(boolean fromJSON,String[] excluded) |
| 59 | { |
| 60 | _fromJSON=fromJSON; |
| 61 | if (excluded!=null) |
| 62 | _excluded=new HashSet(Arrays.asList(excluded)); |
| 63 | } |
| 64 | |
| 65 | public Object fromJSON(Map map) |
| 66 | { |
| 67 | if (_fromJSON) |
| 68 | throw new UnsupportedOperationException(); |
| 69 | return map; |
| 70 | } |
| 71 | |
| 72 | public void toJSON(Object obj, Output out) |
| 73 | { |
| 74 | try |
| 75 | { |
| 76 | Class c=obj.getClass(); |
| 77 | |
| 78 | if (_fromJSON) |
| 79 | out.addClass(obj.getClass()); |
| 80 | |
| 81 | Method[] methods = obj.getClass().getMethods(); |
| 82 | |
| 83 | for (int i=0;i<methods.length;i++) |
| 84 | { |
| 85 | Method m=methods[i]; |
| 86 | if (!Modifier.isStatic(m.getModifiers()) && |
| 87 | m.getParameterTypes().length==0 && |
| 88 | m.getReturnType()!=null && |
| 89 | m.getDeclaringClass()!=Object.class) |
| 90 | { |
| 91 | String name=m.getName(); |
| 92 | if (name.startsWith("is")) |
| 93 | name=name.substring(2,3).toLowerCase(Locale.ENGLISH)+name.substring(3); |
| 94 | else if (name.startsWith("get")) |
| 95 | name=name.substring(3,4).toLowerCase(Locale.ENGLISH)+name.substring(4); |
| 96 | else |
| 97 | continue; |
| 98 | |
| 99 | if (includeField(name,obj,m)) |
| 100 | out.add(name, m.invoke(obj,(Object[])null)); |
| 101 | } |
| 102 | } |
| 103 | } |
| 104 | catch (Throwable e) |
| 105 | { |
| 106 | throw new IllegalArgumentException(e); |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | protected boolean includeField(String name, Object o, Method m) |
| 111 | { |
| 112 | return _excluded==null || !_excluded.contains(name); |
| 113 | } |
| 114 | |
| 115 | } |