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1
18 package org.apache.activemq.web.filter;
19
20 import org.springframework.web.bind.ServletRequestDataBinder;
21 import org.springframework.web.context.WebApplicationContext;
22 import org.springframework.web.context.support.WebApplicationContextUtils;
23
24 import javax.servlet.Filter  ;
25 import javax.servlet.FilterChain ;
26 import javax.servlet.FilterConfig ;
27 import javax.servlet.ServletContext ;
28 import javax.servlet.ServletException ;
29 import javax.servlet.ServletRequest ;
30 import javax.servlet.ServletResponse ;
31 import java.io.IOException ;
32 import java.util.AbstractMap ;
33 import java.util.Collections ;
34 import java.util.Map ;
35 import java.util.Set ;
36
37
57 public class ApplicationContextFilter implements Filter {
58
59 private ServletContext servletContext;
60 private String applicationContextName = "applicationContext";
61 private String requestContextName = "requestContext";
62 private String requestName = "request";
63
64 public void init(FilterConfig config) throws ServletException {
65 this.servletContext = config.getServletContext();
66 this.applicationContextName = getInitParameter(config, "applicationContextName", applicationContextName);
67 this.requestContextName = getInitParameter(config, "requestContextName", requestContextName);
68 this.requestName = getInitParameter(config, "requestName", requestName);
69
70 WebApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(servletContext);
72 Map wrapper = createApplicationContextWrapper(context);
73 servletContext.setAttribute(applicationContextName, wrapper);
74 }
75
76 public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException , ServletException {
77 Map requestContextWrapper = createRequestContextWrapper(request);
79 request.setAttribute(requestContextName, requestContextWrapper);
80 request.setAttribute(requestName, request);
81 chain.doFilter(request, response);
82 }
83
84 public void destroy() {
85 }
86
87 public ServletContext getServletContext() {
88 return servletContext;
89 }
90
91 public String getApplicationContextName() {
92 return applicationContextName;
93 }
94
95 public void setApplicationContextName(String variableName) {
96 this.applicationContextName = variableName;
97 }
98
99 public String getRequestContextName() {
100 return requestContextName;
101 }
102
103 public void setRequestContextName(String requestContextName) {
104 this.requestContextName = requestContextName;
105 }
106
107 protected String getInitParameter(FilterConfig config, String key, String defaultValue) {
108 String parameter = config.getInitParameter(key);
109 return (parameter != null) ? parameter : defaultValue;
110 }
111
112
117 protected Map createApplicationContextWrapper(final WebApplicationContext context) {
118 Map wrapper = new AbstractMap () {
119
120 public WebApplicationContext getContext() {
121 return context;
122 }
123
124 public Object get(Object key) {
125 if (key == null) {
126 return null;
127 }
128 return context.getBean(key.toString());
129 }
130
131 public Set entrySet() {
132 return Collections.EMPTY_SET;
133 }
134
135 };
136 return wrapper;
137 }
138
139
145 protected Map createRequestContextWrapper(final ServletRequest request) {
146 final WebApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(servletContext);
147 Map wrapper = new AbstractMap () {
148
149 public WebApplicationContext getContext() {
150 return context;
151 }
152
153 public Object get(Object key) {
154 if (key == null) {
155 return null;
156 }
157 return bindRequestBean(context.getBean(key.toString()), request);
158 }
159
160 public Set entrySet() {
161 return Collections.EMPTY_SET;
162 }
163
164 };
165 return wrapper;
166
167 }
168
169
174 protected Object bindRequestBean(Object bean, ServletRequest request) {
175 ServletRequestDataBinder binder = new ServletRequestDataBinder(bean, null);
176 binder.bind(request);
177 return bean;
178 }
179
180 }
181 |
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