Annotation of java/classes/org/w3c/jigsaw/servlet/ServletIndexer.java, revision 1.10
1.1 bmahe 1: // ServletIndexer.java
1.10 ! ylafon 2: // $Id: ServletIndexer.java,v 1.9 2000/08/16 21:37:45 ylafon Exp $
1.1 bmahe 3: // (c) COPYRIGHT MIT and INRIA, 1998.
4: // Please first read the full copyright statement in file COPYRIGHT.html
5:
6: package org.w3c.jigsaw.servlet;
7:
1.9 ylafon 8: import java.io.File;
1.1 bmahe 9:
1.9 ylafon 10: import java.util.Enumeration;
11: import java.util.Hashtable;
12:
13:
14:
15: import org.w3c.tools.resources.AttributeHolder;
16: import org.w3c.tools.resources.FramedResource;
17: import org.w3c.tools.resources.InvalidResourceException;
18: import org.w3c.tools.resources.RequestInterface;
19: import org.w3c.tools.resources.Resource;
20: import org.w3c.tools.resources.ResourceReference;
21:
22: import org.w3c.tools.resources.indexer.SampleResourceIndexer;
1.1 bmahe 23:
24: /**
1.10 ! ylafon 25: * @version $Revision: 1.9 $
1.1 bmahe 26: * @author Benoît Mahé (bmahe@w3.org)
27: */
28: public class ServletIndexer extends SampleResourceIndexer {
29:
30: /**
31: * Copy one hastable in another one.
32: * @param fromdefs The source
33: * @param todefs The destination
34: */
35: protected void copyDefs(Hashtable fromdefs, Hashtable toDefs) {
36: Enumeration keys = fromdefs.keys();
37: while(keys.hasMoreElements()) {
38: Object key = keys.nextElement();
39: toDefs.put(keys, fromdefs.get(key));
40: }
41: }
42:
43: /**
44: * Create a default file resource for this file (that exists).
45: * @param directory The directory of the file.
46: * @param name The name of the file.
47: * @param defs A set of default attribute values.
48: * @return An instance of Resource, or <strong>null</strong> if
49: * we were unable to create it.
50: */
51:
52: protected Resource createFileResource(File directory,
53: RequestInterface req,
54: String name,
55: Hashtable defs)
56: {
57: if (! name.endsWith(".class"))
58: return super.createFileResource(directory, req, name, defs);
59: ResourceReference rr = null;
60: FramedResource template = null;
61:
62: // Check that at least one class is defined for all the extensions:
63: String exts[] = getFileExtensions(name) ;
64: if ( exts == null )
65: return null ;
66: for (int i = exts.length-1 ; i >= 0 ; i--) {
67: rr = getTemplateFor(exts[i]) ;
68: if ( rr != null )
69: break ;
70: }
71: if ( rr == null ) {
72: // Look for a default template:
73: if ((rr = loadExtension(defname)) == null)
74: return null ;
75: return super.createFileResource(directory, req, name, defs);
76: } else {
77: //this could become a servlet
78: Hashtable tempdefs = null;
1.10 ! ylafon 79: String s_dir = "directory".intern();
! 80: String s_ide = "identifier".intern();
! 81: String s_ser = "servlet-class".intern();
! 82: String s_con = "context".intern();
! 83: String s_url = "url".intern();
! 84: if (defs != null) {
1.1 bmahe 85: tempdefs = (Hashtable) defs.clone();
1.10 ! ylafon 86: } else {
1.1 bmahe 87: tempdefs = new Hashtable(5) ;
1.10 ! ylafon 88: }
! 89: if ( tempdefs.get(s_dir) == null )
! 90: tempdefs.put(s_dir, directory) ;
! 91: if ( tempdefs.get(s_con) == null )
! 92: tempdefs.put(s_con, getContext());
1.1 bmahe 93: try {
94: template = (FramedResource) rr.lock();
95: if (template instanceof ServletWrapper) {
1.10 ! ylafon 96: if (tempdefs.get(s_ser) == null)
! 97: tempdefs.put(s_ser, name);
1.4 bmahe 98: String id = getIndexedFileName(name);
1.10 ! ylafon 99: tempdefs.put(s_ide, id) ;
! 100: String url = (String) tempdefs.get(s_url);
1.1 bmahe 101: if ((url != null) && (url.endsWith(".class"))) {
1.4 bmahe 102: int idx = url.lastIndexOf(".class");
1.10 ! ylafon 103: tempdefs.put(s_url, url.substring(0, idx));
1.1 bmahe 104: }
105: } else {
1.10 ! ylafon 106: if ( tempdefs.get(s_ide) == null )
! 107: tempdefs.put(s_ide, name);
1.1 bmahe 108: }
109: if (exts != null) {
110: // Merge with values defined by the extension:
111: for (int i = exts.length ; --i >= 0 ; )
112: mergeDefaultAttributes(template, exts[i], tempdefs) ;
113: }
1.2 bmahe 114: // Create, initialize and return the new resource
1.1 bmahe 115: try {
116: FramedResource cloned =
117: (FramedResource) template.getClone(tempdefs);
118: if (cloned instanceof ServletWrapper) {
119: ServletWrapper wrapper = (ServletWrapper) cloned;
120: // check the servlet class
121: if (! wrapper.isWrappingAServlet())
122: return null;
123: }
1.2 bmahe 124: //ok, the defs are good.
1.1 bmahe 125: copyDefs(tempdefs, defs);
126: return cloned;
127: } catch (Exception ex) {
128: ex.printStackTrace() ;
129: return null ;
130: }
131: } catch (InvalidResourceException ex) {
132: ex.printStackTrace();
133: return null;
134: } finally {
135: rr.unlock();
136: }
137: }
1.3 bmahe 138: }
139:
140: /**
141: * Try to create a virtual resource if the real (physical) resource
142: * is not there.
143: * @param directory The directory the file is in.
144: * @param name The name of the file.
145: * @param defs Any default attribute values that should be provided
146: * to the created resource at initialization time.
147: * @return A Resource instance, or <strong>null</strong> if the given
148: * file can't be truned into a resource given our configuration
149: * database.
150: */
151:
152: protected Resource createVirtualResource( File directory,
1.6 ylafon 153: RequestInterface req,
1.3 bmahe 154: String name,
155: Hashtable defs)
156: {
1.6 ylafon 157: Resource res = super.createVirtualResource(directory, req, name, defs);
1.3 bmahe 158: if (res != null)
159: return res;
160: //could be a servlet
1.5 bmahe 161: char fileSeparatorChar = File.separatorChar;
162: String sname = name.replace('.', fileSeparatorChar)+".class";
1.3 bmahe 163: File servletfile = new File(directory, sname);
164: if (servletfile.exists())
1.8 bmahe 165: return createFileResource(directory, null, name+".class", defs);
1.3 bmahe 166: else
167: return null;
1.4 bmahe 168: }
169:
170: protected String getIndexedFileName(String name) {
171: String indexed = name;
172: int idx = name.lastIndexOf(".class");
173: if (idx != -1)
174: indexed = name.substring(0,idx);
175: return indexed;
1.1 bmahe 176: }
177: }
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