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annotate src/org/eclipse/jetty/server/handler/AbstractHandlerContainer.java @ 1058:419bf9c03d84
remove HttpGenerator._method
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 08 Nov 2016 04:17:22 -0700 |
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1 // |
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2 // ======================================================================== |
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
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4 // ------------------------------------------------------------------------ |
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5 // All rights reserved. This program and the accompanying materials |
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6 // are made available under the terms of the Eclipse Public License v1.0 |
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7 // and Apache License v2.0 which accompanies this distribution. |
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8 // |
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9 // The Eclipse Public License is available at |
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10 // http://www.eclipse.org/legal/epl-v10.html |
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11 // |
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12 // The Apache License v2.0 is available at |
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13 // http://www.opensource.org/licenses/apache2.0.php |
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14 // |
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15 // You may elect to redistribute this code under either of these licenses. |
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16 // ======================================================================== |
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17 // |
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18 |
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19 package org.eclipse.jetty.server.handler; |
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20 |
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21 |
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22 import java.io.IOException; |
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23 |
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24 import org.eclipse.jetty.server.Handler; |
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25 import org.eclipse.jetty.server.HandlerContainer; |
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26 import org.eclipse.jetty.util.LazyList; |
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27 import org.eclipse.jetty.util.TypeUtil; |
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28 |
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29 |
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30 /* ------------------------------------------------------------ */ |
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31 /** Abstract Handler Container. |
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32 * This is the base class for handlers that may contain other handlers. |
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33 * |
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34 */ |
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35 public abstract class AbstractHandlerContainer extends AbstractHandler implements HandlerContainer |
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36 { |
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37 /* ------------------------------------------------------------ */ |
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38 public AbstractHandlerContainer() |
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39 { |
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40 } |
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41 |
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42 /* ------------------------------------------------------------ */ |
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43 public Handler[] getChildHandlers() |
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44 { |
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45 Object list = expandChildren(null,null); |
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46 return (Handler[])LazyList.toArray(list, Handler.class); |
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47 } |
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48 |
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49 /* ------------------------------------------------------------ */ |
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50 public Handler[] getChildHandlersByClass(Class<?> byclass) |
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51 { |
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52 Object list = expandChildren(null,byclass); |
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53 return (Handler[])LazyList.toArray(list, byclass); |
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54 } |
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55 |
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56 /* ------------------------------------------------------------ */ |
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57 public <T extends Handler> T getChildHandlerByClass(Class<T> byclass) |
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58 { |
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59 // TODO this can be more efficient? |
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60 Object list = expandChildren(null,byclass); |
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61 if (list==null) |
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62 return null; |
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63 return (T)LazyList.get(list, 0); |
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64 } |
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65 |
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66 /* ------------------------------------------------------------ */ |
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67 protected Object expandChildren(Object list, Class<?> byClass) |
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68 { |
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69 return list; |
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70 } |
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71 |
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72 /* ------------------------------------------------------------ */ |
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73 protected Object expandHandler(Handler handler, Object list, Class<Handler> byClass) |
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74 { |
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75 if (handler==null) |
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76 return list; |
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77 |
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78 if (byClass==null || byClass.isAssignableFrom(handler.getClass())) |
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79 list=LazyList.add(list, handler); |
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80 |
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81 if (handler instanceof AbstractHandlerContainer) |
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82 list=((AbstractHandlerContainer)handler).expandChildren(list, byClass); |
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83 else if (handler instanceof HandlerContainer) |
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84 { |
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85 HandlerContainer container = (HandlerContainer)handler; |
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86 Handler[] handlers=byClass==null?container.getChildHandlers():container.getChildHandlersByClass(byClass); |
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87 list=LazyList.addArray(list, handlers); |
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88 } |
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89 |
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90 return list; |
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91 } |
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92 |
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93 /* ------------------------------------------------------------ */ |
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94 public static <T extends HandlerContainer> T findContainerOf(HandlerContainer root,Class<T>type, Handler handler) |
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95 { |
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96 if (root==null || handler==null) |
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97 return null; |
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98 |
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99 Handler[] branches=root.getChildHandlersByClass(type); |
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100 if (branches!=null) |
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101 { |
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102 for (Handler h:branches) |
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103 { |
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104 T container = (T)h; |
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105 Handler[] candidates = container.getChildHandlersByClass(handler.getClass()); |
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106 if (candidates!=null) |
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107 { |
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108 for (Handler c:candidates) |
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109 if (c==handler) |
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110 return container; |
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111 } |
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112 } |
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113 } |
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114 return null; |
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115 } |
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116 |
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117 /* ------------------------------------------------------------ */ |
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118 public void dump(Appendable out,String indent) throws IOException |
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119 { |
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120 dumpThis(out); |
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121 dump(out,indent,getBeans(),TypeUtil.asList(getHandlers())); |
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122 } |
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123 } |