Annotation of java/classes/org/w3c/jigsaw/servlet/ServletIndexer.java, revision 1.8.4.1
1.1 bmahe 1: // ServletIndexer.java
1.8.4.1 ! bmahe 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:
1.8.4.1 ! bmahe 8: import java.io.File;
1.1 bmahe 9:
1.8.4.1 ! bmahe 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: /**
1.8.4.1 ! bmahe 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;
79: if (defs != null)
80: tempdefs = (Hashtable) defs.clone();
81: else
82: tempdefs = new Hashtable(5) ;
83: if ( tempdefs.get("directory") == null )
84: tempdefs.put("directory", directory) ;
85: if ( tempdefs.get("context") == null )
86: tempdefs.put("context", getContext());
87: try {
88: template = (FramedResource) rr.lock();
89: if (template instanceof ServletWrapper) {
90: if (tempdefs.get("servlet-class") == null)
91: tempdefs.put("servlet-class", name);
1.4 bmahe 92: String id = getIndexedFileName(name);
1.1 bmahe 93: tempdefs.put("identifier", id) ;
94: String url = (String) tempdefs.get("url");
95: if ((url != null) && (url.endsWith(".class"))) {
1.4 bmahe 96: int idx = url.lastIndexOf(".class");
1.1 bmahe 97: tempdefs.put("url", url.substring(0, idx));
98: }
99: } else {
100: if ( tempdefs.get("identifier") == null )
101: tempdefs.put("identifier", name);
102: }
103: if (exts != null) {
104: // Merge with values defined by the extension:
105: for (int i = exts.length ; --i >= 0 ; )
106: mergeDefaultAttributes(template, exts[i], tempdefs) ;
107: }
1.2 bmahe 108: // Create, initialize and return the new resource
1.1 bmahe 109: try {
110: FramedResource cloned =
111: (FramedResource) template.getClone(tempdefs);
112: if (cloned instanceof ServletWrapper) {
113: ServletWrapper wrapper = (ServletWrapper) cloned;
114: // check the servlet class
115: if (! wrapper.isWrappingAServlet())
116: return null;
117: }
1.2 bmahe 118: //ok, the defs are good.
1.1 bmahe 119: copyDefs(tempdefs, defs);
120: return cloned;
121: } catch (Exception ex) {
122: ex.printStackTrace() ;
123: return null ;
124: }
125: } catch (InvalidResourceException ex) {
126: ex.printStackTrace();
127: return null;
128: } finally {
129: rr.unlock();
130: }
131: }
1.3 bmahe 132: }
133:
134: /**
135: * Try to create a virtual resource if the real (physical) resource
136: * is not there.
137: * @param directory The directory the file is in.
138: * @param name The name of the file.
139: * @param defs Any default attribute values that should be provided
140: * to the created resource at initialization time.
141: * @return A Resource instance, or <strong>null</strong> if the given
142: * file can't be truned into a resource given our configuration
143: * database.
144: */
145:
146: protected Resource createVirtualResource( File directory,
1.6 ylafon 147: RequestInterface req,
1.3 bmahe 148: String name,
149: Hashtable defs)
150: {
1.6 ylafon 151: Resource res = super.createVirtualResource(directory, req, name, defs);
1.3 bmahe 152: if (res != null)
153: return res;
154: //could be a servlet
1.5 bmahe 155: char fileSeparatorChar = File.separatorChar;
156: String sname = name.replace('.', fileSeparatorChar)+".class";
1.3 bmahe 157: File servletfile = new File(directory, sname);
158: if (servletfile.exists())
1.8 bmahe 159: return createFileResource(directory, null, name+".class", defs);
1.3 bmahe 160: else
161: return null;
1.4 bmahe 162: }
163:
164: protected String getIndexedFileName(String name) {
165: String indexed = name;
166: int idx = name.lastIndexOf(".class");
167: if (idx != -1)
168: indexed = name.substring(0,idx);
169: return indexed;
1.1 bmahe 170: }
171: }
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