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From r...@apache.org
Subject cvs commit: jakarta-tomcat-4.1/catalina/src/share/org/apache/naming/resources WARDirContext.java LocalStrings.properties
Date Sat, 20 Jan 2001 18:54:36 GMT
remm        01/01/20 10:54:36

  Modified:    catalina/src/share/org/apache/naming/resources
                        LocalStrings.properties
  Added:       catalina/src/share/org/apache/naming/resources
                        WARDirContext.java
  Log:
  - Add a new WARDirContext.
  - Enables to run web applications directly from a WAR file
    (without unpacking).
  - Will not be compatible with any servlets who want to directly read
    files from the filesystem. Jasper falls into that category.
  
  Revision  Changes    Path
  1.4       +2 -0      jakarta-tomcat-4.1/catalina/src/share/org/apache/naming/resources/LocalStrings.properties
  
  Index: LocalStrings.properties
  ===================================================================
  RCS file: /home/cvs/jakarta-tomcat-4.1/catalina/src/share/org/apache/naming/resources/LocalStrings.properties,v
  retrieving revision 1.3
  retrieving revision 1.4
  diff -u -r1.3 -r1.4
  --- LocalStrings.properties	2001/01/13 21:17:06	1.3
  +++ LocalStrings.properties	2001/01/20 18:54:36	1.4
  @@ -1,4 +1,6 @@
   fileResources.base=Document base {0} does not exist or is not a readable directory
  +warResources.notWar=Doc base must point to a WAR file
  +warResources.invalidWar=Invalid or unreadable WAR file : {0}
   jarResources.syntax=Document base {0} must start with 'jar:' and end with '!/'
   resources.alreadyStarted=Resources has already been started
   resources.connect=Cannot connect to document base {0}
  
  
  
  1.1                  jakarta-tomcat-4.1/catalina/src/share/org/apache/naming/resources/WARDirContext.java
  
  Index: WARDirContext.java
  ===================================================================
  /*
   * $Header: /home/cvs/jakarta-tomcat-4.1/catalina/src/share/org/apache/naming/resources/WARDirContext.java,v
1.1 2001/01/20 18:54:36 remm Exp $
   * $Revision: 1.1 $
   * $Date: 2001/01/20 18:54:36 $
   *
   * ====================================================================
   *
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 1999 The Apache Software Foundation.  All rights 
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer. 
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:  
   *       "This product includes software developed by the 
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written 
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Group.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   * [Additional notices, if required by prior licensing conditions]
   *
   */ 
  
  
  package org.apache.naming.resources;
  
  import java.util.Hashtable;
  import java.util.Vector;
  import java.util.Date;
  import java.util.Enumeration;
  import java.io.File;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.io.IOException;
  import java.util.zip.ZipEntry;
  import java.util.zip.ZipFile;
  import java.util.zip.ZipException;
  import javax.naming.Context;
  import javax.naming.Name;
  import javax.naming.NameParser;
  import javax.naming.NamingEnumeration;
  import javax.naming.NamingException;
  import javax.naming.CompositeName;
  import javax.naming.NameParser;
  import javax.naming.OperationNotSupportedException;
  import javax.naming.NameAlreadyBoundException;
  import javax.naming.directory.DirContext;
  import javax.naming.directory.Attributes;
  import javax.naming.directory.Attribute;
  import javax.naming.directory.ModificationItem;
  import javax.naming.directory.SearchControls;
  import org.apache.naming.StringManager;
  import org.apache.naming.NameParserImpl;
  import org.apache.naming.NamingEntry;
  import org.apache.naming.NamingContextBindingsEnumeration;
  import org.apache.naming.NamingContextEnumeration;
  
  /**
   * WAR Directory Context implementation.
   *
   * @author Remy Maucherat
   * @version $Revision: 1.1 $ $Date: 2001/01/20 18:54:36 $
   */
  
  public class WARDirContext extends BaseDirContext {
  
  
      // ----------------------------------------------------------- Constructors
  
  
      /**
       * Builds a WAR directory context using the given environment.
       */
      public WARDirContext() {
          super();
      }
  
  
      /**
       * Builds a WAR directory context using the given environment.
       */
      public WARDirContext(Hashtable env) {
          super(env);
      }
  
  
      /**
       * Constructor used for returning fake subcontexts.
       */
      protected WARDirContext(ZipFile base, Entry entries) {
          this.base = base;
          this.entries = entries;
      }
  
  
      // ----------------------------------------------------- Instance Variables
  
  
      /**
       * The WAR file.
       */
      protected ZipFile base = null;
  
  
      /**
       * WAR entries.
       */
      protected Entry entries = null;
  
  
      // ------------------------------------------------------------- Properties
  
  
      /**
       * Set the document root.
       * 
       * @param docBase The new document root
       * 
       * @exception IllegalArgumentException if the specified value is not
       *  supported by this implementation
       * @exception IllegalArgumentException if this would create a
       *  malformed URL
       */
      public void setDocBase(String docBase) {
  
  	// Validate the format of the proposed document root
  	if (docBase == null)
  	    throw new IllegalArgumentException
  		(sm.getString("resources.null"));
  	if (!(docBase.endsWith(".war")))
  	    throw new IllegalArgumentException
  		(sm.getString("warResources.notWar"));
  
  	// Calculate a File object referencing this document base directory
  	File base = new File(docBase);
  
  	// Validate that the document base is an existing directory
  	if (!base.exists() || !base.canRead() || base.isDirectory())
  	    throw new IllegalArgumentException
  		(sm.getString("warResources.notWar"));
          try {
              this.base = new ZipFile(base);
          } catch (Exception e) {
  	    throw new IllegalArgumentException
  		(sm.getString("warResources.invalidWar", e.getMessage()));
          }
          super.setDocBase(docBase);
  
          loadEntries();
  
      }
  
  
      // -------------------------------------------------------- Context Methods
  
  
      /**
       * Retrieves the named object.
       * 
       * @param name the name of the object to look up
       * @return the object bound to name
       * @exception NamingException if a naming exception is encountered
       */
      public Object lookup(String name)
          throws NamingException {
          return lookup(new CompositeName(name));
      }
  
  
      /**
       * Retrieves the named object. If name is empty, returns a new instance 
       * of this context (which represents the same naming context as this 
       * context, but its environment may be modified independently and it may 
       * be accessed concurrently).
       * 
       * @param name the name of the object to look up
       * @return the object bound to name
       * @exception NamingException if a naming exception is encountered
       */
      public Object lookup(Name name)
          throws NamingException {
          if (name.isEmpty())
              return this;
          Entry entry = treeLookup(name);
          if (entry == null)
              throw new NamingException
                  (sm.getString("resources.notFound", name));
          ZipEntry zipEntry = entry.getEntry();
          if (zipEntry.isDirectory())
              return new WARDirContext(base, entry);
          else
              return new WARResource(entry.getEntry());
      }
  
  
      /**
       * Unbinds the named object. Removes the terminal atomic name in name 
       * from the target context--that named by all but the terminal atomic 
       * part of name.
       * <p>
       * This method is idempotent. It succeeds even if the terminal atomic 
       * name is not bound in the target context, but throws 
       * NameNotFoundException if any of the intermediate contexts do not exist. 
       * 
       * @param name the name to bind; may not be empty
       * @exception NameNotFoundException if an intermediate context does not 
       * exist
       * @exception NamingException if a naming exception is encountered
       */
      public void unbind(String name)
          throws NamingException {
          throw new OperationNotSupportedException();
      }
  
  
      /**
       * Binds a new name to the object bound to an old name, and unbinds the 
       * old name. Both names are relative to this context. Any attributes 
       * associated with the old name become associated with the new name. 
       * Intermediate contexts of the old name are not changed.
       * 
       * @param oldName the name of the existing binding; may not be empty
       * @param newName the name of the new binding; may not be empty
       * @exception NameAlreadyBoundException if newName is already bound
       * @exception NamingException if a naming exception is encountered
       */
      public void rename(String oldName, String newName)
          throws NamingException {
          throw new OperationNotSupportedException();
      }
  
  
      /**
       * Enumerates the names bound in the named context, along with the class 
       * names of objects bound to them. The contents of any subcontexts are 
       * not included.
       * <p>
       * If a binding is added to or removed from this context, its effect on 
       * an enumeration previously returned is undefined.
       * 
       * @param name the name of the context to list
       * @return an enumeration of the names and class names of the bindings in 
       * this context. Each element of the enumeration is of type NameClassPair.
       * @exception NamingException if a naming exception is encountered
       */
      public NamingEnumeration list(String name)
          throws NamingException {
          return list(new CompositeName(name));
      }
  
  
      /**
       * Enumerates the names bound in the named context, along with the class 
       * names of objects bound to them. The contents of any subcontexts are 
       * not included.
       * <p>
       * If a binding is added to or removed from this context, its effect on 
       * an enumeration previously returned is undefined.
       * 
       * @param name the name of the context to list
       * @return an enumeration of the names and class names of the bindings in 
       * this context. Each element of the enumeration is of type NameClassPair.
       * @exception NamingException if a naming exception is encountered
       */
      public NamingEnumeration list(Name name)
          throws NamingException {
          if (name.isEmpty())
              return new NamingContextEnumeration(list(entries));
          Entry entry = treeLookup(name);
          if (entry == null)
              throw new NamingException
                  (sm.getString("resources.notFound", name));
          return new NamingContextEnumeration(list(entry));
      }
  
  
      /**
       * Enumerates the names bound in the named context, along with the 
       * objects bound to them. The contents of any subcontexts are not 
       * included.
       * <p>
       * If a binding is added to or removed from this context, its effect on 
       * an enumeration previously returned is undefined.
       * 
       * @param name the name of the context to list
       * @return an enumeration of the bindings in this context. 
       * Each element of the enumeration is of type Binding.
       * @exception NamingException if a naming exception is encountered
       */
      public NamingEnumeration listBindings(String name)
          throws NamingException {
          return listBindings(new CompositeName(name));
      }
  
  
      /**
       * Enumerates the names bound in the named context, along with the 
       * objects bound to them. The contents of any subcontexts are not 
       * included.
       * <p>
       * If a binding is added to or removed from this context, its effect on 
       * an enumeration previously returned is undefined.
       * 
       * @param name the name of the context to list
       * @return an enumeration of the bindings in this context. 
       * Each element of the enumeration is of type Binding.
       * @exception NamingException if a naming exception is encountered
       */
      public NamingEnumeration listBindings(Name name)
          throws NamingException {
          if (name.isEmpty())
              return new NamingContextBindingsEnumeration(list(entries));
          Entry entry = treeLookup(name);
          if (entry == null)
              throw new NamingException
                  (sm.getString("resources.notFound", name));
          return new NamingContextBindingsEnumeration(list(entry));
      }
  
  
      /**
       * Destroys the named context and removes it from the namespace. Any 
       * attributes associated with the name are also removed. Intermediate 
       * contexts are not destroyed.
       * <p>
       * This method is idempotent. It succeeds even if the terminal atomic 
       * name is not bound in the target context, but throws 
       * NameNotFoundException if any of the intermediate contexts do not exist. 
       * 
       * In a federated naming system, a context from one naming system may be 
       * bound to a name in another. One can subsequently look up and perform 
       * operations on the foreign context using a composite name. However, an 
       * attempt destroy the context using this composite name will fail with 
       * NotContextException, because the foreign context is not a "subcontext" 
       * of the context in which it is bound. Instead, use unbind() to remove 
       * the binding of the foreign context. Destroying the foreign context 
       * requires that the destroySubcontext() be performed on a context from 
       * the foreign context's "native" naming system.
       * 
       * @param name the name of the context to be destroyed; may not be empty
       * @exception NameNotFoundException if an intermediate context does not 
       * exist
       * @exception NotContextException if the name is bound but does not name 
       * a context, or does not name a context of the appropriate type
       */
      public void destroySubcontext(String name)
          throws NamingException {
          throw new OperationNotSupportedException();
      }
  
  
      /**
       * Retrieves the named object, following links except for the terminal 
       * atomic component of the name. If the object bound to name is not a 
       * link, returns the object itself.
       * 
       * @param name the name of the object to look up
       * @return the object bound to name, not following the terminal link 
       * (if any).
       * @exception NamingException if a naming exception is encountered
       */
      public Object lookupLink(String name)
          throws NamingException {
          // Note : Links are not supported
          return lookup(name);
      }
  
  
      /**
       * Retrieves the full name of this context within its own namespace.
       * <p>
       * Many naming services have a notion of a "full name" for objects in 
       * their respective namespaces. For example, an LDAP entry has a 
       * distinguished name, and a DNS record has a fully qualified name. This 
       * method allows the client application to retrieve this name. The string 
       * returned by this method is not a JNDI composite name and should not be 
       * passed directly to context methods. In naming systems for which the 
       * notion of full name does not make sense, 
       * OperationNotSupportedException is thrown.
       * 
       * @return this context's name in its own namespace; never null
       * @exception OperationNotSupportedException if the naming system does 
       * not have the notion of a full name
       * @exception NamingException if a naming exception is encountered
       */
      public String getNameInNamespace()
          throws NamingException {
          return docBase;
      }
  
  
      // ----------------------------------------------------- DirContext Methods
  
  
      /**
       * Retrieves selected attributes associated with a named object. 
       * See the class description regarding attribute models, attribute type 
       * names, and operational attributes.
       * 
       * @return the requested attributes; never null
       * @param name the name of the object from which to retrieve attributes
       * @param attrIds the identifiers of the attributes to retrieve. null 
       * indicates that all attributes should be retrieved; an empty array 
       * indicates that none should be retrieved
       * @exception NamingException if a naming exception is encountered
       */
      public Attributes getAttributes(String name, String[] attrIds)
          throws NamingException {
          return getAttributes(new CompositeName(name), attrIds);
      }
  
  
      /**
       * Retrieves all of the attributes associated with a named object. 
       * 
       * @return the set of attributes associated with name. 
       * Returns an empty attribute set if name has no attributes; never null.
       * @param name the name of the object from which to retrieve attributes
       * @exception NamingException if a naming exception is encountered
       */
      public Attributes getAttributes(Name name, String[] attrIds)
          throws NamingException {
          
          Entry entry = null;
          if (name.isEmpty())
              entry = entries;
          else
              entry = treeLookup(name);
          if (entry == null)
              throw new NamingException
                  (sm.getString("resources.notFound", name));
          
          ZipEntry zipEntry = entry.getEntry();
  
          ResourceAttributes attrs = new ResourceAttributes();
          attrs.setCreationDate(new Date(zipEntry.getTime()));
          attrs.setName(entry.getName());
          if (!zipEntry.isDirectory())
              attrs.setResourceType("");
          attrs.setContentLength(zipEntry.getSize());
          attrs.setLastModified(new Date(zipEntry.getTime()));
          
          return attrs;
          
      }
  
  
      /**
       * Modifies the attributes associated with a named object. The order of 
       * the modifications is not specified. Where possible, the modifications 
       * are performed atomically.
       * 
       * @param name the name of the object whose attributes will be updated
       * @param mod_op the modification operation, one of: ADD_ATTRIBUTE, 
       * REPLACE_ATTRIBUTE, REMOVE_ATTRIBUTE
       * @param attrs the attributes to be used for the modification; may not 
       * be null
       * @exception AttributeModificationException if the modification cannot be
       * completed successfully
       * @exception NamingException if a naming exception is encountered
       */
      public void modifyAttributes(String name, int mod_op, Attributes attrs)
          throws NamingException {
          throw new OperationNotSupportedException();
      }
  
  
      /**
       * Modifies the attributes associated with a named object using an an 
       * ordered list of modifications. The modifications are performed in the 
       * order specified. Each modification specifies a modification operation 
       * code and an attribute on which to operate. Where possible, the 
       * modifications are performed atomically.
       * 
       * @param name the name of the object whose attributes will be updated
       * @param mods an ordered sequence of modifications to be performed; may 
       * not be null
       * @exception AttributeModificationException if the modification cannot be
       * completed successfully
       * @exception NamingException if a naming exception is encountered
       */
      public void modifyAttributes(String name, ModificationItem[] mods)
          throws NamingException {
          throw new OperationNotSupportedException();
      }
  
  
      /**
       * Binds a name to an object, along with associated attributes. If attrs 
       * is null, the resulting binding will have the attributes associated 
       * with obj if obj is a DirContext, and no attributes otherwise. If attrs 
       * is non-null, the resulting binding will have attrs as its attributes; 
       * any attributes associated with obj are ignored.
       * 
       * @param name the name to bind; may not be empty
       * @param obj the object to bind; possibly null
       * @param attrs the attributes to associate with the binding
       * @exception NameAlreadyBoundException if name is already bound
       * @exception InvalidAttributesException if some "mandatory" attributes 
       * of the binding are not supplied
       * @exception NamingException if a naming exception is encountered
       */
      public void bind(String name, Object obj, Attributes attrs)
          throws NamingException {
          throw new OperationNotSupportedException();
      }
  
  
      /**
       * Binds a name to an object, along with associated attributes, 
       * overwriting any existing binding. If attrs is null and obj is a 
       * DirContext, the attributes from obj are used. If attrs is null and obj 
       * is not a DirContext, any existing attributes associated with the object
       * already bound in the directory remain unchanged. If attrs is non-null, 
       * any existing attributes associated with the object already bound in 
       * the directory are removed and attrs is associated with the named 
       * object. If obj is a DirContext and attrs is non-null, the attributes 
       * of obj are ignored.
       * 
       * @param name the name to bind; may not be empty
       * @param obj the object to bind; possibly null
       * @param attrs the attributes to associate with the binding
       * @exception InvalidAttributesException if some "mandatory" attributes 
       * of the binding are not supplied
       * @exception NamingException if a naming exception is encountered
       */
      public void rebind(String name, Object obj, Attributes attrs)
          throws NamingException {
          throw new OperationNotSupportedException();
      }
  
  
      /**
       * Creates and binds a new context, along with associated attributes. 
       * This method creates a new subcontext with the given name, binds it in 
       * the target context (that named by all but terminal atomic component of 
       * the name), and associates the supplied attributes with the newly 
       * created object. All intermediate and target contexts must already 
       * exist. If attrs is null, this method is equivalent to 
       * Context.createSubcontext().
       * 
       * @param name the name of the context to create; may not be empty
       * @param attrs the attributes to associate with the newly created context
       * @return the newly created context
       * @exception NameAlreadyBoundException if the name is already bound
       * @exception InvalidAttributesException if attrs does not contain all 
       * the mandatory attributes required for creation
       * @exception NamingException if a naming exception is encountered
       */
      public DirContext createSubcontext(String name, Attributes attrs)
          throws NamingException {
          throw new OperationNotSupportedException();
      }
  
  
      /**
       * Retrieves the schema associated with the named object. The schema 
       * describes rules regarding the structure of the namespace and the 
       * attributes stored within it. The schema specifies what types of 
       * objects can be added to the directory and where they can be added; 
       * what mandatory and optional attributes an object can have. The range 
       * of support for schemas is directory-specific.
       * 
       * @param name the name of the object whose schema is to be retrieved
       * @return the schema associated with the context; never null
       * @exception OperationNotSupportedException if schema not supported
       * @exception NamingException if a naming exception is encountered
       */
      public DirContext getSchema(String name)
          throws NamingException {
          throw new OperationNotSupportedException();
      }
  
  
      /**
       * Retrieves a context containing the schema objects of the named 
       * object's class definitions.
       * 
       * @param name the name of the object whose object class definition is to 
       * be retrieved
       * @return the DirContext containing the named object's class 
       * definitions; never null
       * @exception OperationNotSupportedException if schema not supported
       * @exception NamingException if a naming exception is encountered
       */
      public DirContext getSchemaClassDefinition(String name)
          throws NamingException {
          throw new OperationNotSupportedException();
      }
  
  
      /**
       * Searches in a single context for objects that contain a specified set 
       * of attributes, and retrieves selected attributes. The search is 
       * performed using the default SearchControls settings.
       * 
       * @param name the name of the context to search
       * @param matchingAttributes the attributes to search for. If empty or 
       * null, all objects in the target context are returned.
       * @param attributesToReturn the attributes to return. null indicates 
       * that all attributes are to be returned; an empty array indicates that 
       * none are to be returned.
       * @return a non-null enumeration of SearchResult objects. Each 
       * SearchResult contains the attributes identified by attributesToReturn 
       * and the name of the corresponding object, named relative to the 
       * context named by name.
       * @exception NamingException if a naming exception is encountered
       */
      public NamingEnumeration search(String name, Attributes matchingAttributes,
                                      String[] attributesToReturn)
          throws NamingException {
          throw new OperationNotSupportedException();
      }
  
  
      /**
       * Searches in a single context for objects that contain a specified set 
       * of attributes. This method returns all the attributes of such objects. 
       * It is equivalent to supplying null as the atributesToReturn parameter 
       * to the method search(Name, Attributes, String[]).
       * 
       * @param name the name of the context to search
       * @param matchingAttributes the attributes to search for. If empty or 
       * null, all objects in the target context are returned.
       * @return a non-null enumeration of SearchResult objects. Each 
       * SearchResult contains the attributes identified by attributesToReturn 
       * and the name of the corresponding object, named relative to the 
       * context named by name.
       * @exception NamingException if a naming exception is encountered
       */
      public NamingEnumeration search(String name, Attributes matchingAttributes)
          throws NamingException {
          throw new OperationNotSupportedException();
      }
  
  
      /**
       * Searches in the named context or object for entries that satisfy the 
       * given search filter. Performs the search as specified by the search 
       * controls.
       * 
       * @param name the name of the context or object to search
       * @param filter the filter expression to use for the search; may not be 
       * null
       * @param cons the search controls that control the search. If null, 
       * the default search controls are used (equivalent to 
       * (new SearchControls())).
       * @return an enumeration of SearchResults of the objects that satisfy 
       * the filter; never null
       * @exception InvalidSearchFilterException if the search filter specified 
       * is not supported or understood by the underlying directory
       * @exception InvalidSearchControlsException if the search controls 
       * contain invalid settings
       * @exception NamingException if a naming exception is encountered
       */
      public NamingEnumeration search(String name, String filter, 
                                      SearchControls cons)
          throws NamingException {
          throw new OperationNotSupportedException();
      }
  
  
      /**
       * Searches in the named context or object for entries that satisfy the 
       * given search filter. Performs the search as specified by the search 
       * controls.
       * 
       * @param name the name of the context or object to search
       * @param filterExpr the filter expression to use for the search. 
       * The expression may contain variables of the form "{i}" where i is a 
       * nonnegative integer. May not be null.
       * @param filterArgs the array of arguments to substitute for the 
       * variables in filterExpr. The value of filterArgs[i] will replace each 
       * occurrence of "{i}". If null, equivalent to an empty array.
       * @param cons the search controls that control the search. If null, the 
       * default search controls are used (equivalent to (new SearchControls())).
       * @return an enumeration of SearchResults of the objects that satisy the 
       * filter; never null
       * @exception ArrayIndexOutOfBoundsException if filterExpr contains {i} 
       * expressions where i is outside the bounds of the array filterArgs
       * @exception InvalidSearchControlsException if cons contains invalid 
       * settings
       * @exception InvalidSearchFilterException if filterExpr with filterArgs 
       * represents an invalid search filter
       * @exception NamingException if a naming exception is encountered
       */
      public NamingEnumeration search(String name, String filterExpr, 
                                      Object[] filterArgs, SearchControls cons)
          throws NamingException {
          throw new OperationNotSupportedException();
      }
  
  
      // ------------------------------------------------------ Protected Methods
  
  
      /**
       * Normalize the name of an entry read from the Zip.
       */
      protected String normalize(ZipEntry entry) {
  
          String result = "/" + entry.getName();
          if (entry.isDirectory()) {
              result = result.substring(0, result.length() - 1);
          }
          return result;
  
      }
  
  
      /**
       * Constructs a tree of the entries contained in a WAR file.
       */
      protected void loadEntries() {
  
          try {
  
              Enumeration entryList = base.entries();
              entries = new Entry("/", new ZipEntry("/"));
              
              while (entryList.hasMoreElements()) {
                  
                  ZipEntry entry = (ZipEntry) entryList.nextElement();
                  String name = normalize(entry);
                  int pos = name.lastIndexOf('/');
                  String entryName = name.substring(pos + 1, name.length());
                  Name compositeName = new CompositeName(name.substring(0, pos));
                  Entry parent = treeLookup(compositeName);
                  Entry child = new Entry(entryName, entry);
                  if (parent != null)
                      parent.addChild(child);
                  
              }
  
          } catch (Exception e) {
          }
  
      }
  
  
      /**
       * Entry tree lookup.
       */
      protected Entry treeLookup(Name name) {
          if (name.isEmpty())
              return entries;
          Entry currentEntry = entries;
          for (int i = 0; i < name.size(); i++) {
              if (name.get(i).length() == 0)
                  continue;
              currentEntry = currentEntry.getChild(name.get(i));
              if (currentEntry == null)
                  return null;
          }
          return currentEntry;
      }
  
  
      /**
       * List children as objects.
       */
      protected Vector list(Entry entry) {
          
          Vector entries = new Vector();
          Entry[] children = entry.getChildren();
          NamingEntry namingEntry = null;
          
          for (int i = 0; i < children.length; i++) {
              ZipEntry current = children[i].getEntry();
              Object object = null;
              if (current.isDirectory()) {
                  object = new WARDirContext(base, children[i]);
              } else {
                  object = new WARResource(current);
              }
              namingEntry = new NamingEntry
                  (children[i].getName(), object, NamingEntry.ENTRY);
              entries.addElement(namingEntry);
          }
          
          return entries;
          
      }
  
  
      // ---------------------------------------------------- Entries Inner Class
  
  
      /**
       * Entries structure.
       */
      protected class Entry {
  
  
          // -------------------------------------------------------- Constructor
          
          
          public Entry(String name, ZipEntry entry) {
              this.name = name;
              this.entry = entry;
          }
          
          
          // --------------------------------------------------- Member Variables
          
          
          protected String name = null;
          
          
          protected ZipEntry entry = null;
          
          
          protected Entry children[] = new Entry[0];
          
          
          // ----------------------------------------------------- Public Methods
          
          
          public ZipEntry getEntry() {
              return entry;
          }
          
          
          public String getName() {
              return name;
          }
          
          
          public void addChild(Entry entry) {
              Entry[] newChildren = new Entry[children.length + 1];
              for (int i = 0; i < children.length; i++)
                  newChildren[i] = children[i];
              newChildren[children.length] = entry;
              children = newChildren;
          }
  
  
          public Entry[] getChildren() {
              return children;
          }
  
  
          public Entry getChild(String name) {
              for (int i = 0; i < children.length; i++) {
                  if (children[i].name.equals(name)) {
                      return children[i];
                  }
              }
              return null;
          }
  
  
      }
  
  
      // ------------------------------------------------ WARResource Inner Class
  
  
      /**
       * This specialized resource implementation avoids opening the IputStream
       * to the WAR right away.
       */
      protected class WARResource extends Resource {
          
          
          // -------------------------------------------------------- Constructor
          
          
          public WARResource(ZipEntry entry) {
              this.entry = entry;
          }
          
          
          // --------------------------------------------------- Member Variables
          
          
          protected ZipEntry entry;
          
          
          // ----------------------------------------------------- Public Methods
          
          
          /**
           * Content accessor.
           * 
           * @return InputStream
           */
          public InputStream streamContent()
              throws IOException {
              try {
                  if ((inputStream == null) && (binaryContent == null)) {
                      inputStream = base.getInputStream(entry);
                  }
              } catch (ZipException e) {
                  throw new IOException(e.getMessage());
              }
              return super.streamContent();
          }
          
          
      }
  
  
  }
  
  
  
  

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