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org.apache.jetspeed.om.page.proxy.PageProxy	0%	0%

1		/*
2		* Licensed to the Apache Software Foundation (ASF) under one or more
3		* contributor license agreements. See the NOTICE file distributed with
4		* this work for additional information regarding copyright ownership.
5		* The ASF licenses this file to You under the Apache License, Version 2.0
6		* (the "License"); you may not use this file except in compliance with
7		* the License. You may obtain a copy of the License at
8		*
9		* http://www.apache.org/licenses/LICENSE-2.0
10		*
11		* Unless required by applicable law or agreed to in writing, software
12		* distributed under the License is distributed on an "AS IS" BASIS,
13		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14		* See the License for the specific language governing permissions and
15		* limitations under the License.
16		*/
17		package org.apache.jetspeed.om.page.proxy;
18
19		import java.lang.reflect.InvocationHandler;
20		import java.lang.reflect.Method;
21		import java.lang.reflect.Proxy;
22
23		import org.apache.jetspeed.om.folder.Folder;
24		import org.apache.jetspeed.om.folder.proxy.FolderProxy;
25		import org.apache.jetspeed.om.page.Page;
26		import org.apache.jetspeed.page.document.proxy.NodeProxy;
27		import org.apache.jetspeed.portalsite.view.SiteView;
28
29		/**
30		* This class proxies PSML Page instances to create a logical view
31		* of site content using the Dynamic Proxy pattern.
32		*
33		* @author <a href="mailto:rwatler@apache.org">Randy Watler</a>
34		* @version $Id: PageProxy.java 517121 2007-03-12 07:45:49Z ate $
35		*/
36		public class PageProxy extends NodeProxy implements InvocationHandler
37		{
38		/**
39		* *_METHOD - Page method constants
40		*/
41	0	protected static final Method GET_MENU_DEFINITIONS_METHOD = reflectMethod(Page.class, "getMenuDefinitions", null);
42
43		/**
44		* page - proxy delegate page instance
45		*/
46		private Page page;
47
48		/**
49		* newInstance - creates a new proxy instance that implements the Page interface
50		*
51		* @param view site view owner of this proxy
52		* @param locatorName name of profile locator associated
53		* with the proxy delegate
54		* @param parentFolder view parent proxy folder
55		* @param page proxy delegate
56		*/
57		public static Page newInstance(SiteView view, String locatorName, Folder parentFolder, Page page)
58		{
59	0	return (Page)Proxy.newProxyInstance(page.getClass().getClassLoader(), new Class[]{Page.class}, class="keyword">new PageProxy(view, locatorName, parentFolder, page));
60		}
61
62		/**
63		* PageProxy - private constructor used by newInstance()
64		*
65		* @param view site view owner of this proxy
66		* @param locatorName name of profile locator associated
67		* with the proxy delegate
68		* @param parentFolder view parent proxy folder
69		* @param page proxy delegate
70		*/
71		private PageProxy(SiteView view, String locatorName, Folder parentFolder, Page page)
72		{
73	0	super(view, locatorName, parentFolder, page.getName(), page.isHidden());
74	0	this.page = page;
75	0	}
76
77		/**
78		* invoke - method invocation dispatch for this proxy, (defaults to
79		* invocation of delegate unless method is implemented in this
80		* proxy handler or should be hidden/stubbed)
81		*
82		* @param proxy instance invoked against
83		* @param method Page interface method invoked
84		* @param args method arguments
85		* @throws Throwable
86		*/
87		public Object invoke(Object proxy, Method m, Object [] args) throws Throwable
88		{
89		// proxy implementation method dispatch
90	0	if (m.equals(GET_MENU_DEFINITIONS_METHOD))
91		{
92	0	return getMenuDefinitions();
93		}
94	0	else if (m.equals(GET_PARENT_METHOD))
95		{
96	0	return getParent();
97		}
98	0	else if (m.equals(GET_PATH_METHOD))
99		{
100	0	return getPath();
101		}
102	0	else if (m.equals(GET_URL_METHOD))
103		{
104	0	return getUrl();
105		}
106	0	else if (m.equals(EQUALS_METHOD))
107		{
108	0	return new Boolean(equals(args[0]));
109		}
110	0	else if (m.equals(HASH_CODE_METHOD))
111		{
112	0	return new Integer(hashCode());
113		}
114	0	else if (m.equals(IS_HIDDEN_METHOD))
115		{
116	0	return new Boolean(isHidden());
117		}
118	0	else if (m.equals(TO_STRING_METHOD))
119		{
120	0	return toString();
121		}
122
123		// proxy suppression of not implemented or mutable methods
124	0	if (m.getName().startsWith("set"))
125		{
126	0	throw new RuntimeException("Page instance is immutable from proxy.");
127		}
128
129		// attempt to invoke method on delegate Page instance
130	0	return m.invoke(page, args);
131		}
132
133		/**
134		* getPage - get proxy delegate page instance
135		*
136		* @return delegate page
137		*/
138		public Page getPage()
139		{
140	0	return page;
141		}
142
143		/**
144		* aggregateMenuDefinitionLocators - aggregate all menu definition locators
145		* in site view for this folder or page
146		*/
147		protected void aggregateMenuDefinitionLocators()
148		{
149		// merge page and parent folder menu definition locators
150		// by name, (most specific page definitions are merged first
151		// since they override any folder definitions); note parent
152		// folder menu definitions include standard menu definition
153		// locator defaults
154	0	mergeMenuDefinitionLocators(page.getMenuDefinitions(), page);
155	0	FolderProxy parentFolderProxy = (FolderProxy)Proxy.getInvocationHandler(getParent());
156	0	mergeMenuDefinitionLocators(parentFolderProxy.getMenuDefinitionLocators());
157	0	}
158		}

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