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1 package jfun.yan.web;
2
3 import java.io.InputStream  ;
4 import java.net.MalformedURLException ;
5 import java.net.URL ;
6
7 import javax.servlet.ServletContext ;
8
9 import jfun.yan.util.resource.ResourceLoader;
10
11
18 public class ServletContextResourceLoader implements ResourceLoader {
19 private final ServletContext ctxt;
20 private final ResourceLoader loader;
21 private static final String WEB_RESOURCE_PREFIX = "/";
22 public ServletContextResourceLoader(ServletContext ctxt,
23 ResourceLoader loader) {
24 this.loader = loader;
25 this.ctxt = ctxt;
26 }
27
28 public URL getResource(String path) {
29 if(isWebResource(path)){
30 try{
31 return ctxt.getResource(path);
32 }
33 catch(MalformedURLException e){
34 return null;
35 }
36 }
37 else{
38 return loader.getResource(path);
39 }
40 }
41
42 public InputStream getResourceAsStream(String path) {
43 if(isWebResource(path)){
44 return ctxt.getResourceAsStream(path);
45 }
46 else{
47 return loader.getResourceAsStream(path);
48 }
49 }
50 private static boolean isWebResource(String path){
51 return path!=null && path.trim().startsWith(WEB_RESOURCE_PREFIX);
52 }
53
56 public ServletContext getServletContext(){
57 return ctxt;
58 }
59
62 public ResourceLoader getResourceLoader(){
63 return loader;
64 }
65
66 public boolean equals(Object obj) {
67 if(obj instanceof ServletContextResourceLoader){
68 final ServletContextResourceLoader other = (ServletContextResourceLoader)obj;
69 return ctxt.equals(other.ctxt) && loader.equals(other.loader);
70 }
71 else return false;
72 }
73
74 public int hashCode() {
75 return ctxt.hashCode()*31+loader.hashCode();
76 }
77
78 public String toString() {
79 return getClass().getName();
80 }
81
82 }
83 |
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