Annotation of java/classes/org/w3c/jigsaw/servlet/ServletIndexer.java, revision 1.11
1.1 bmahe 1: // ServletIndexer.java
1.11 ! ylafon 2: // $Id: ServletIndexer.java,v 1.10 2002/06/26 17:55:05 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;
9: import java.util.Enumeration;
10: import java.util.Hashtable;
1.11 ! ylafon 11: import java.util.Map;
1.9 ylafon 12: import org.w3c.tools.resources.FramedResource;
13: import org.w3c.tools.resources.InvalidResourceException;
14: import org.w3c.tools.resources.RequestInterface;
15: import org.w3c.tools.resources.Resource;
16: import org.w3c.tools.resources.ResourceReference;
17: import org.w3c.tools.resources.indexer.SampleResourceIndexer;
1.1 bmahe 18:
19: /**
1.11 ! ylafon 20: * @author Benoît Mahé (bmahe@w3.org)
! 21: * @version $Revision: 1.10 $
1.1 bmahe 22: */
23: public class ServletIndexer extends SampleResourceIndexer {
24:
25: /**
26: * Copy one hastable in another one.
1.11 ! ylafon 27: *
1.1 bmahe 28: * @param fromdefs The source
1.11 ! ylafon 29: * @param todefs The destination
1.1 bmahe 30: */
31: protected void copyDefs(Hashtable fromdefs, Hashtable toDefs) {
1.11 ! ylafon 32: Enumeration keys = fromdefs.keys();
! 33: while (keys.hasMoreElements()) {
! 34: Object key = keys.nextElement();
! 35: toDefs.put(keys, fromdefs.get(key));
! 36: }
1.1 bmahe 37: }
38:
39: /**
40: * Create a default file resource for this file (that exists).
1.11 ! ylafon 41: *
1.1 bmahe 42: * @param directory The directory of the file.
1.11 ! ylafon 43: * @param name The name of the file.
! 44: * @param defs A set of default attribute values.
1.1 bmahe 45: * @return An instance of Resource, or <strong>null</strong> if
1.11 ! ylafon 46: * we were unable to create it.
1.1 bmahe 47: */
48:
49: protected Resource createFileResource(File directory,
1.11 ! ylafon 50: RequestInterface req,
! 51: String name,
! 52: Hashtable defs) {
! 53: if (!name.endsWith(".class"))
! 54: return super.createFileResource(directory, req, name, defs);
! 55: ResourceReference rr = null;
! 56: FramedResource template = null;
! 57:
! 58: // Check that at least one class is defined for all the extensions:
! 59: String exts[] = getFileExtensions(name);
! 60: if (exts == null)
! 61: return null;
! 62: for (int i = exts.length - 1; i >= 0; i--) {
! 63: rr = getTemplateFor(exts[i]);
! 64: if (rr != null)
! 65: break;
! 66: }
! 67: if (rr == null) {
! 68: // Look for a default template:
! 69: if ((rr = loadExtension(defname)) == null)
! 70: return null;
! 71: return super.createFileResource(directory, req, name, defs);
! 72: } else {
! 73: //this could become a servlet
! 74: Hashtable tempdefs = null;
! 75: String s_dir = "directory".intern();
! 76: String s_ide = "identifier".intern();
! 77: String s_ser = "servlet-class".intern();
! 78: String s_con = "context".intern();
! 79: String s_url = "url".intern();
! 80: if (defs != null) {
! 81: tempdefs = (Hashtable) defs.clone();
! 82: } else {
! 83: tempdefs = new Hashtable(5);
! 84: }
! 85: if (tempdefs.get(s_dir) == null)
! 86: tempdefs.put(s_dir, directory);
! 87: if (tempdefs.get(s_con) == null)
! 88: tempdefs.put(s_con, getContext());
! 89: try {
! 90: template = (FramedResource) rr.lock();
! 91: if (template instanceof ServletWrapper) {
! 92: if (tempdefs.get(s_ser) == null)
! 93: tempdefs.put(s_ser, name);
! 94: String id = getIndexedFileName(name);
! 95: tempdefs.put(s_ide, id);
! 96: String url = (String) tempdefs.get(s_url);
! 97: if ((url != null) && (url.endsWith(".class"))) {
! 98: int idx = url.lastIndexOf(".class");
! 99: tempdefs.put(s_url, url.substring(0, idx));
! 100: }
! 101: } else {
! 102: if (tempdefs.get(s_ide) == null)
! 103: tempdefs.put(s_ide, name);
! 104: }
! 105: if (exts != null) {
! 106: // Merge with values defined by the extension:
! 107: for (int i = exts.length; --i >= 0; )
! 108: mergeDefaultAttributes(template, exts[i], tempdefs);
! 109: }
! 110: // Create, initialize and return the new resource
! 111: try {
! 112: FramedResource cloned =
! 113: (FramedResource) template.getClone(tempdefs);
! 114: if (cloned instanceof ServletWrapper) {
! 115: ServletWrapper wrapper = (ServletWrapper) cloned;
! 116: // check the servlet class
! 117: if (!wrapper.isWrappingAServlet())
! 118: return null;
! 119: }
! 120: //ok, the defs are good.
! 121: copyDefs(tempdefs, defs);
! 122: return cloned;
! 123: } catch (Exception ex) {
! 124: ex.printStackTrace();
! 125: return null;
! 126: }
! 127: } catch (InvalidResourceException ex) {
! 128: ex.printStackTrace();
! 129: return null;
! 130: } finally {
! 131: rr.unlock();
! 132: }
! 133: }
1.3 bmahe 134: }
135:
136: /**
137: * Try to create a virtual resource if the real (physical) resource
138: * is not there.
1.11 ! ylafon 139: *
1.3 bmahe 140: * @param directory The directory the file is in.
1.11 ! ylafon 141: * @param name The name of the file.
! 142: * @param defs Any default attribute values that should be provided
! 143: * to the created resource at initialization time.
1.3 bmahe 144: * @return A Resource instance, or <strong>null</strong> if the given
1.11 ! ylafon 145: * file can't be truned into a resource given our configuration
! 146: * database.
1.3 bmahe 147: */
148:
1.11 ! ylafon 149: protected Resource createVirtualResource(File directory,
! 150: RequestInterface req,
! 151: String name,
! 152: Map<String, Object> defs) {
! 153: Resource res = super.createVirtualResource(directory, req, name, defs);
! 154: if (res != null)
! 155: return res;
! 156: //could be a servlet
! 157: char fileSeparatorChar = File.separatorChar;
! 158: String sname = name.replace('.', fileSeparatorChar) + ".class";
! 159: File servletfile = new File(directory, sname);
! 160: if (servletfile.exists())
! 161: return createFileResource(directory, null, name + ".class", defs);
! 162: else
! 163: return null;
1.4 bmahe 164: }
165:
166: protected String getIndexedFileName(String name) {
1.11 ! ylafon 167: String indexed = name;
! 168: int idx = name.lastIndexOf(".class");
! 169: if (idx != -1)
! 170: indexed = name.substring(0, idx);
! 171: return indexed;
1.1 bmahe 172: }
173: }
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