BasicAttributeContext xref

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1   /*
2    * $Id: BasicAttributeContext.java 784215 2009-06-12 17:36:13Z apetrelli $
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   * http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  package org.apache.tiles.context;
23  
24  import java.util.Map;
25  import java.util.Stack;
26  
27  import org.apache.tiles.Attribute;
28  import org.apache.tiles.AttributeContext;
29  
30  /***
31   * Deprecated implementation for <code>AttributeContext</code>, maintained
32   * for compatibility reasons.
33   *
34   * @version $Rev: 784215 $ $Date: 2009-06-12 19:36:13 +0200 (ven, 12 giu 2009) $
35   * @deprecated Use {@link org.apache.tiles.BasicAttributeContext}.
36   */
37  @Deprecated
38  public class BasicAttributeContext extends
39          org.apache.tiles.BasicAttributeContext {
40  
41      /***
42       * Name used to store attribute context stack.
43       */
44      private static final String ATTRIBUTE_CONTEXT_STACK =
45          "org.apache.tiles.AttributeContext.STACK";
46  
47      /***
48       * Constructor.
49       */
50      public BasicAttributeContext() {
51          super();
52      }
53  
54      /***
55       * Constructor.
56       * Create a context and set specified attributes.
57       *
58       * @param attributes Attributes to initialize context.
59       */
60      public BasicAttributeContext(Map<String, Attribute> attributes) {
61          super(attributes);
62      }
63  
64      /***
65       * Copy constructor.
66       *
67       * @param context The constructor to copy.
68       */
69      public BasicAttributeContext(AttributeContext context) {
70          super(context);
71      }
72  
73      /***
74       * Copy constructor.
75       *
76       * @param context The constructor to copy.
77       */
78      public BasicAttributeContext(BasicAttributeContext context) {
79          super(context);
80      }
81  
82      /***
83       * Get attribute context from request.
84       *
85       * @param tilesContext current Tiles application context.
86       * @return BasicAttributeContext or null if context is not found.
87       * @deprecated Use {@link org.apache.tiles.TilesContainer#getAttributeContext(Object...)}.
88       */
89      @Deprecated
90      public static AttributeContext getContext(TilesRequestContext tilesContext) {
91          Stack<AttributeContext> contextStack = getContextStack(tilesContext);
92          if (!contextStack.isEmpty()) {
93              return contextStack.peek();
94          } else {
95              return null;
96          }
97      }
98  
99      /***
100      * Returns the context stack.
101      *
102      * @param tilesContext The Tiles context object to use.
103      * @return The needed stack of contexts.
104      * @deprecated Use {@link org.apache.tiles.TilesContainer#getAttributeContext(Object...)},
105      * {@link org.apache.tiles.TilesContainer#startContext(Object...)} or
106      * {@link org.apache.tiles.TilesContainer#endContext(Object...)}.
107      */
108     @Deprecated
109     @SuppressWarnings("unchecked")
110     public static Stack<AttributeContext> getContextStack(TilesRequestContext tilesContext) {
111         Stack<AttributeContext> contextStack =
112             (Stack<AttributeContext>) tilesContext.getRequestScope().get(
113                 BasicAttributeContext.ATTRIBUTE_CONTEXT_STACK);
114         if (contextStack == null) {
115             contextStack = new Stack<AttributeContext>();
116             tilesContext.getRequestScope().put(BasicAttributeContext.ATTRIBUTE_CONTEXT_STACK,
117                     contextStack);
118         }
119 
120         return contextStack;
121     }
122 
123     /***
124      * Pushes a context object in the stack.
125      *
126      * @param context The context to push.
127      * @param tilesContext The Tiles context object to use.
128      * @deprecated Use {@link org.apache.tiles.TilesContainer#startContext(Object...)}.
129      */
130     @Deprecated
131     public static void pushContext(AttributeContext context,
132             TilesRequestContext tilesContext) {
133         Stack<AttributeContext> contextStack = getContextStack(tilesContext);
134         contextStack.push(context);
135     }
136 
137     /***
138      * Pops a context object out of the stack.
139      *
140      * @param tilesContext The Tiles context object to use.
141      * @return The popped context object.
142      * @deprecated Use {@link org.apache.tiles.TilesContainer#endContext(Object...)}.
143      */
144     @Deprecated
145     public static AttributeContext popContext(TilesRequestContext tilesContext) {
146         Stack<AttributeContext> contextStack = getContextStack(tilesContext);
147         return contextStack.pop();
148     }
149 }