Major merge with Classpath.

	Removed many duplicate files.
	* HACKING: Updated.x
	* classpath: Imported new directory.
	* standard.omit: New file.
	* Makefile.in, aclocal.m4, configure: Rebuilt.
	* sources.am: New file.
	* configure.ac: Run Classpath configure script.  Moved code around
	to support.  Disable xlib AWT peers (temporarily).
	* Makefile.am (SUBDIRS): Added 'classpath'
	(JAVAC): Removed.
	(AM_CPPFLAGS): Added more -I options.
	(BOOTCLASSPATH): Simplified.
	Completely redid how sources are built.
	Include sources.am.
	* include/Makefile.am (tool_include__HEADERS): Removed jni.h.
	* include/jni.h: Removed (in Classpath).
	* scripts/classes.pl: Updated to look at built classes.
	* scripts/makemake.tcl: New file.
	* testsuite/libjava.jni/jni.exp (gcj_jni_compile_c_to_so): Added
	-I options.
	(gcj_jni_invocation_compile_c_to_binary): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@102082 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 0 insertions, 740 deletions

diff --git a/libjava/java/security/Security.java b/libjava/java/security/Security.java
deleted file mode 100644
index 54b97923efd..00000000000
--- a/libjava/java/security/Security.java
+++ /dev/null
@@ -1,740 +0,0 @@
-/* Security.java --- Java base security class implementation
-   Copyright (C) 1999, 2001, 2002, 2003, 2004  Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING.  If not, write to the
-Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library.  Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module.  An independent module is a module which is not derived from
-or based on this library.  If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so.  If you do not wish to do so, delete this
-exception statement from your version. */
-
-
-package java.security;
-
-import gnu.classpath.SystemProperties;
-
-import gnu.classpath.Configuration;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.net.URL;
-import java.util.Collections;
-import java.util.Enumeration;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.LinkedHashSet;
-import java.util.Map;
-import java.util.Properties;
-import java.util.Set;
-import java.util.Vector;
-
-/**
- * This class centralizes all security properties and common security methods.
- * One of its primary uses is to manage providers.
- *
- * @author Mark Benvenuto (ivymccough@worldnet.att.net)
- */
-public final class Security
-{
-  private static final String ALG_ALIAS = "Alg.Alias.";
-
-  private static Vector providers = new Vector();
-  private static Properties secprops = new Properties();
-  
-  static
-    {
-      String base = SystemProperties.getProperty("gnu.classpath.home.url");
-      String vendor = SystemProperties.getProperty("gnu.classpath.vm.shortname");
-
-      // Try VM specific security file
-      boolean loaded = loadProviders (base, vendor);
-    
-      // Append classpath standard provider if possible
-      if (!loadProviders (base, "classpath")
-	  && !loaded
-	  && providers.size() == 0)
-	  {
-	      if (Configuration.DEBUG)
-		  {
-		      /* No providers found and both security files failed to
-		       * load properly. Give a warning in case of DEBUG is
-		       * enabled. Could be done with java.util.logging later.
-		       */
-		      System.err.println
-			  ("WARNING: could not properly read security provider files:");
-		      System.err.println
-			  ("         " + base + "/security/" + vendor
-			   + ".security");
-		      System.err.println
-			  ("         " + base + "/security/" + "classpath"
-			   + ".security");
-		      System.err.println
-			  ("         Falling back to standard GNU security provider");
-		  }
-	      providers.addElement (new gnu.java.security.provider.Gnu());
-	  }
-    }
-  // This class can't be instantiated.
-  private Security()
-  {
-  }
-
-  /**
-   * Tries to load the vender specific security providers from the given
-   * base URL. Returns true if the resource could be read and completely
-   * parsed successfully, false otherwise.
-   */
-  private static boolean loadProviders(String baseUrl, String vendor)
-  {
-    if (baseUrl == null || vendor == null)
-      return false;
-
-    boolean result = true;
-    String secfilestr = baseUrl + "/security/" + vendor + ".security";
-    try
-      {
-	InputStream fin = new URL(secfilestr).openStream();
-	secprops.load(fin);
-
-	int i = 1;
-	String name;
-	while ((name = secprops.getProperty("security.provider." + i)) != null)
-	  {
-	    Exception exception = null;
-	    try
-	      {
-		providers.addElement(Class.forName(name).newInstance());
-	      }
-	    catch (ClassNotFoundException x)
-	      {
-	        exception = x;
-	      }
-	    catch (InstantiationException x)
-	      {
-	        exception = x;
-	      }
-	    catch (IllegalAccessException x)
-	      {
-	        exception = x;
-	      }
-
-	    if (exception != null)
-	      {
-		System.err.println ("WARNING: Error loading security provider "
-				    + name + ": " + exception);
-		result = false;
-	      }
-	    i++;
-	  }
-      }
-    catch (IOException ignored)
-      {
-	result = false;
-      }
-
-    return result;
-  }
-
-  /**
-   * Gets a specified property for an algorithm. The algorithm name should be a
-   * standard name. See Appendix A in the Java Cryptography Architecture API
-   * Specification & Reference for information about standard algorithm
-   * names. One possible use is by specialized algorithm parsers, which may map
-   * classes to algorithms which they understand (much like {@link Key} parsers
-   * do).
-   *
-   * @param algName the algorithm name.
-   * @param propName the name of the property to get.
-   * @return the value of the specified property.
-   * @deprecated This method used to return the value of a proprietary property
-   * in the master file of the "SUN" Cryptographic Service Provider in order to
-   * determine how to parse algorithm-specific parameters. Use the new
-   * provider-based and algorithm-independent {@link AlgorithmParameters} and
-   * {@link KeyFactory} engine classes (introduced in the Java 2 platform)
-   * instead.
-   */
-  public static String getAlgorithmProperty(String algName, String propName)
-  {
-    if (algName == null || propName == null)
-      return null;
-
-    String property = String.valueOf(propName) + "." + String.valueOf(algName);
-    Provider p;
-    for (Iterator i = providers.iterator(); i.hasNext(); )
-      {
-        p = (Provider) i.next();
-        for (Iterator j = p.keySet().iterator(); j.hasNext(); )
-          {
-            String key = (String) j.next();
-            if (key.equalsIgnoreCase(property))
-              return p.getProperty(key);
-          }
-      }
-    return null;
-  }
-
-  /**
-   * <p>Adds a new provider, at a specified position. The position is the
-   * preference order in which providers are searched for requested algorithms.
-   * Note that it is not guaranteed that this preference will be respected. The
-   * position is 1-based, that is, <code>1</code> is most preferred, followed by
-   * <code>2</code>, and so on.</p>
-   *
-   * <p>If the given provider is installed at the requested position, the
-   * provider that used to be at that position, and all providers with a
-   * position greater than position, are shifted up one position (towards the
-   * end of the list of installed providers).</p>
-   *
-   * <p>A provider cannot be added if it is already installed.</p>
-   *
-   * <p>First, if there is a security manager, its <code>checkSecurityAccess()
-   * </code> method is called with the string <code>"insertProvider."+provider.
-   * getName()</code> to see if it's ok to add a new provider. If the default
-   * implementation of <code>checkSecurityAccess()</code> is used (i.e., that
-   * method is not overriden), then this will result in a call to the security
-   * manager's <code>checkPermission()</code> method with a
-   * <code>SecurityPermission("insertProvider."+provider.getName())</code>
-   * permission.</p>
-   *
-   * @param provider the provider to be added.
-   * @param position the preference position that the caller would like for
-   * this provider.
-   * @return the actual preference position in which the provider was added, or
-   * <code>-1</code> if the provider was not added because it is already
-   * installed.
-   * @throws SecurityException if a security manager exists and its
-   * {@link SecurityManager#checkSecurityAccess(String)} method denies access
-   * to add a new provider.
-   * @see #getProvider(String)
-   * @see #removeProvider(String)
-   * @see SecurityPermission
-   */
-  public static int insertProviderAt(Provider provider, int position)
-  {
-    SecurityManager sm = System.getSecurityManager();
-    if (sm != null)
-      sm.checkSecurityAccess("insertProvider." + provider.getName());
-
-    position--;
-    int max = providers.size ();
-    for (int i = 0; i < max; i++)
-      {
-	if (((Provider) providers.elementAt(i)).getName().equals(provider.getName()))
-	  return -1;
-      }
-
-    if (position < 0)
-      position = 0;
-    if (position > max)
-      position = max;
-
-    providers.insertElementAt(provider, position);
-
-    return position + 1;
-  }
-
-  /**
-   * <p>Adds a provider to the next position available.</p>
-   *
-   * <p>First, if there is a security manager, its <code>checkSecurityAccess()
-   * </code> method is called with the string <code>"insertProvider."+provider.
-   * getName()</code> to see if it's ok to add a new provider. If the default
-   * implementation of <code>checkSecurityAccess()</code> is used (i.e., that
-   * method is not overriden), then this will result in a call to the security
-   * manager's <code>checkPermission()</code> method with a
-   * <code>SecurityPermission("insertProvider."+provider.getName())</code>
-   * permission.</p>
-   *
-   * @param provider the provider to be added.
-   * @return the preference position in which the provider was added, or
-   * <code>-1</code> if the provider was not added because it is already
-   * installed.
-   * @throws SecurityException if a security manager exists and its
-   * {@link SecurityManager#checkSecurityAccess(String)} method denies access
-   * to add a new provider.
-   * @see #getProvider(String)
-   * @see #removeProvider(String)
-   * @see SecurityPermission
-   */
-  public static int addProvider(Provider provider)
-  {
-    return insertProviderAt (provider, providers.size () + 1);
-  }
-
-  /**
-   * <p>Removes the provider with the specified name.</p>
-   *
-   * <p>When the specified provider is removed, all providers located at a
-   * position greater than where the specified provider was are shifted down
-   * one position (towards the head of the list of installed providers).</p>
-   *
-   * <p>This method returns silently if the provider is not installed.</p>
-   *
-   * <p>First, if there is a security manager, its <code>checkSecurityAccess()
-   * </code> method is called with the string <code>"removeProvider."+name</code>
-   * to see if it's ok to remove the provider. If the default implementation of
-   * <code>checkSecurityAccess()</code> is used (i.e., that method is not
-   * overriden), then this will result in a call to the security manager's
-   * <code>checkPermission()</code> method with a <code>SecurityPermission(
-   * "removeProvider."+name)</code> permission.</p>
-   *
-   * @param name the name of the provider to remove.
-   * @throws SecurityException if a security manager exists and its
-   * {@link SecurityManager#checkSecurityAccess(String)} method denies access
-   * to remove the provider.
-   * @see #getProvider(String)
-   * @see #addProvider(Provider)
-   */
-  public static void removeProvider(String name)
-  {
-    SecurityManager sm = System.getSecurityManager();
-    if (sm != null)
-      sm.checkSecurityAccess("removeProvider." + name);
-
-    int max = providers.size ();
-    for (int i = 0; i < max; i++)
-      {
-	if (((Provider) providers.elementAt(i)).getName().equals(name))
-	  {
-	    providers.remove(i);
-	    break;
-	  }
-      }
-  }
-
-  /**
-   * Returns an array containing all the installed providers. The order of the
-   * providers in the array is their preference order.
-   *
-   * @return an array of all the installed providers.
-   */
-  public static Provider[] getProviders()
-  {
-    Provider[] array = new Provider[providers.size ()];
-    providers.copyInto (array);
-    return array;
-  }
-
-  /**
-   * Returns the provider installed with the specified name, if any. Returns
-   * <code>null</code> if no provider with the specified name is installed.
-   *
-   * @param name the name of the provider to get.
-   * @return the provider of the specified name.
-   * @see #removeProvider(String)
-   * @see #addProvider(Provider)
-   */
-  public static Provider getProvider(String name)
-  {
-    Provider p;
-    int max = providers.size ();
-    for (int i = 0; i < max; i++)
-      {
-	p = (Provider) providers.elementAt(i);
-	if (p.getName().equals(name))
-	  return p;
-      }
-    return null;
-  }
-
-  /**
-   * <p>Gets a security property value.</p>
-   *
-   * <p>First, if there is a security manager, its <code>checkPermission()</code>
-   * method is called with a <code>SecurityPermission("getProperty."+key)</code>
-   * permission to see if it's ok to retrieve the specified security property
-   * value.</p>
-   *
-   * @param key the key of the property being retrieved.
-   * @return the value of the security property corresponding to key.
-   * @throws SecurityException if a security manager exists and its
-   * {@link SecurityManager#checkPermission(Permission)} method denies access
-   * to retrieve the specified security property value.
-   * @see #setProperty(String, String)
-   * @see SecurityPermission
-   */
-  public static String getProperty(String key)
-  {
-    SecurityManager sm = System.getSecurityManager();
-    if (sm != null)
-      sm.checkSecurityAccess("getProperty." + key);
-
-    return secprops.getProperty(key);
-  }
-
-  /**
-   * <p>Sets a security property value.</p>
-   *
-   * <p>First, if there is a security manager, its <code>checkPermission()</code>
-   * method is called with a <code>SecurityPermission("setProperty."+key)</code>
-   * permission to see if it's ok to set the specified security property value.
-   * </p>
-   *
-   * @param key the name of the property to be set.
-   * @param datnum the value of the property to be set.
-   * @throws SecurityException if a security manager exists and its
-   * {@link SecurityManager#checkPermission(Permission)} method denies access
-   * to set the specified security property value.
-   * @see #getProperty(String)
-   * @see SecurityPermission
-   */
-  public static void setProperty(String key, String datnum)
-  {
-    SecurityManager sm = System.getSecurityManager();
-    if (sm != null)
-      sm.checkSecurityAccess("setProperty." + key);
-
-    secprops.put(key, datnum);
-  }
-
-  /**
-   * Returns a Set of Strings containing the names of all available algorithms
-   * or types for the specified Java cryptographic service (e.g., Signature,
-   * MessageDigest, Cipher, Mac, KeyStore). Returns an empty Set if there is no
-   * provider that supports the specified service. For a complete list of Java
-   * cryptographic services, please see the Java Cryptography Architecture API
-   * Specification &amp; Reference. Note: the returned set is immutable.
-   *
-   * @param serviceName the name of the Java cryptographic service (e.g.,
-   * Signature, MessageDigest, Cipher, Mac, KeyStore). Note: this parameter is
-   * case-insensitive.
-   * @return a Set of Strings containing the names of all available algorithms
-   * or types for the specified Java cryptographic service or an empty set if
-   * no provider supports the specified service.
-   * @since 1.4
-   */
-  public static Set getAlgorithms(String serviceName)
-  {
-    HashSet result = new HashSet();
-    if (serviceName == null || serviceName.length() == 0)
-      return result;
-
-    serviceName = serviceName.trim();
-    if (serviceName.length() == 0)
-      return result;
-
-    serviceName = serviceName.toUpperCase()+".";
-    Provider[] providers = getProviders();
-    int ndx;
-    for (int i = 0; i < providers.length; i++)
-      for (Enumeration e = providers[i].propertyNames(); e.hasMoreElements(); )
-        {
-          String service = ((String) e.nextElement()).trim();
-          if (service.toUpperCase().startsWith(serviceName))
-            {
-              service = service.substring(serviceName.length()).trim();
-              ndx = service.indexOf(' '); // get rid of attributes
-              if (ndx != -1)
-                service = service.substring(0, ndx);
-              result.add(service);
-            }
-        }
-    return Collections.unmodifiableSet(result);
-  }
-
-  /**
-   * <p>Returns an array containing all installed providers that satisfy the
-   * specified selection criterion, or <code>null</code> if no such providers
-   * have been installed. The returned providers are ordered according to their
-   * preference order.</p>
-   *
-   * <p>A cryptographic service is always associated with a particular
-   * algorithm or type. For example, a digital signature service is always
-   * associated with a particular algorithm (e.g., <i>DSA</i>), and a
-   * CertificateFactory service is always associated with a particular
-   * certificate type (e.g., <i>X.509</i>).</p>
-   *
-   * <p>The selection criterion must be specified in one of the following two
-   * formats:</p>
-   *
-   * <ul>
-   *    <li><p>&lt;crypto_service&gt;.&lt;algorithm_or_type&gt;</p>
-   *    <p>The cryptographic service name must not contain any dots.</p>
-   *    <p>A provider satisfies the specified selection criterion iff the
-   *    provider implements the specified algorithm or type for the specified
-   *    cryptographic service.</p>
-   *    <p>For example, "CertificateFactory.X.509" would be satisfied by any
-   *    provider that supplied a CertificateFactory implementation for X.509
-   *    certificates.</p></li>
-   *
-   *    <li><p>&lt;crypto_service&gt;.&lt;algorithm_or_type&gt; &lt;attribute_name&gt;:&lt;attribute_value&gt;</p>
-   *    <p>The cryptographic service name must not contain any dots. There must
-   *    be one or more space charaters between the the &lt;algorithm_or_type&gt;
-   *    and the &lt;attribute_name&gt;.</p>
-   *    <p>A provider satisfies this selection criterion iff the provider
-   *    implements the specified algorithm or type for the specified
-   *    cryptographic service and its implementation meets the constraint
-   *    expressed by the specified attribute name/value pair.</p>
-   *    <p>For example, "Signature.SHA1withDSA KeySize:1024" would be satisfied
-   *    by any provider that implemented the SHA1withDSA signature algorithm
-   *    with a keysize of 1024 (or larger).</p></li>
-   * </ul>
-   *
-   * <p>See Appendix A in the Java Cryptogaphy Architecture API Specification
-   * &amp; Reference for information about standard cryptographic service names,
-   * standard algorithm names and standard attribute names.</p>
-   *
-   * @param filter the criterion for selecting providers. The filter is case-
-   * insensitive.
-   * @return all the installed providers that satisfy the selection criterion,
-   * or null if no such providers have been installed.
-   * @throws InvalidParameterException if the filter is not in the required
-   * format.
-   * @see #getProviders(Map)
-   */
-  public static Provider[] getProviders(String filter)
-  {
-    if (providers == null || providers.isEmpty())
-      return null;
-
-    if (filter == null || filter.length() == 0)
-      return getProviders();
-
-    HashMap map = new HashMap(1);
-    int i = filter.indexOf(':');
-    if (i == -1) // <service>.<algorithm>
-      map.put(filter, "");
-    else // <service>.<algorithm> <attribute>:<value>
-      map.put(filter.substring(0, i), filter.substring(i+1));
-
-    return getProviders(map);
-  }
-
- /**
-  * <p>Returns an array containing all installed providers that satisfy the
-  * specified selection criteria, or <code>null</code> if no such providers
-  * have been installed. The returned providers are ordered according to their
-  * preference order.</p>
-  *
-  * <p>The selection criteria are represented by a map. Each map entry
-  * represents a selection criterion. A provider is selected iff it satisfies
-  * all selection criteria. The key for any entry in such a map must be in one
-  * of the following two formats:</p>
-  *
-  * <ul>
-  *    <li><p>&lt;crypto_service&gt;.&lt;algorithm_or_type&gt;</p>
-  *    <p>The cryptographic service name must not contain any dots.</p>
-  *    <p>The value associated with the key must be an empty string.</p>
-  *    <p>A provider satisfies this selection criterion iff the provider
-  *    implements the specified algorithm or type for the specified
-  *    cryptographic service.</p></li>
-  *
-  *    <li><p>&lt;crypto_service&gt;.&lt;algorithm_or_type&gt; &lt;attribute_name&gt;</p>
-  *    <p>The cryptographic service name must not contain any dots. There must
-  *    be one or more space charaters between the &lt;algorithm_or_type&gt; and
-  *    the &lt;attribute_name&gt;.</p>
-  *    <p>The value associated with the key must be a non-empty string. A
-  *    provider satisfies this selection criterion iff the provider implements
-  *    the specified algorithm or type for the specified cryptographic service
-  *    and its implementation meets the constraint expressed by the specified
-  *    attribute name/value pair.</p></li>
-  * </ul>
-  *
-  * <p>See Appendix A in the Java Cryptogaphy Architecture API Specification
-  * &amp; Reference for information about standard cryptographic service names,
-  * standard algorithm names and standard attribute names.</p>
-  *
-  * @param filter the criteria for selecting providers. The filter is case-
-  * insensitive.
-  * @return all the installed providers that satisfy the selection criteria,
-  * or <code>null</code> if no such providers have been installed.
-  * @throws InvalidParameterException if the filter is not in the required
-  * format.
-  * @see #getProviders(String)
-  */
-  public static Provider[] getProviders(Map filter)
-  {
-    if (providers == null || providers.isEmpty())
-      return null;
-
-    if (filter == null)
-      return getProviders();
-
-    Set querries = filter.keySet();
-    if (querries == null || querries.isEmpty())
-      return getProviders();
-
-    LinkedHashSet result = new LinkedHashSet(providers); // assume all
-    int dot, ws;
-    String querry, service, algorithm, attribute, value;
-    LinkedHashSet serviceProviders = new LinkedHashSet(); // preserve insertion order
-    for (Iterator i = querries.iterator(); i.hasNext(); )
-      {
-        querry = (String) i.next();
-        if (querry == null) // all providers
-          continue;
-
-        querry = querry.trim();
-        if (querry.length() == 0) // all providers
-          continue;
-
-        dot = querry.indexOf('.');
-        if (dot == -1) // syntax error
-          throw new InvalidParameterException(
-              "missing dot in '" + String.valueOf(querry)+"'");
-
-        value = (String) filter.get(querry);
-        // deconstruct querry into [service, algorithm, attribute]
-        if (value == null || value.trim().length() == 0) // <service>.<algorithm>
-          {
-            value = null;
-            attribute = null;
-            service = querry.substring(0, dot).trim();
-            algorithm = querry.substring(dot+1).trim();
-          }
-        else // <service>.<algorithm> <attribute>
-          {
-            ws = querry.indexOf(' ');
-            if (ws == -1)
-              throw new InvalidParameterException(
-                  "value (" + String.valueOf(value) +
-                  ") is not empty, but querry (" + String.valueOf(querry) +
-                  ") is missing at least one space character");
-            value = value.trim();
-            attribute = querry.substring(ws+1).trim();
-            // was the dot in the attribute?
-            if (attribute.indexOf('.') != -1)
-              throw new InvalidParameterException(
-                  "attribute_name (" + String.valueOf(attribute) +
-                  ") in querry (" + String.valueOf(querry) + ") contains a dot");
-
-            querry = querry.substring(0, ws).trim();
-            service = querry.substring(0, dot).trim();
-            algorithm = querry.substring(dot+1).trim();
-          }
-
-        // service and algorithm must not be empty
-        if (service.length() == 0)
-          throw new InvalidParameterException(
-              "<crypto_service> in querry (" + String.valueOf(querry) +
-              ") is empty");
-
-        if (algorithm.length() == 0)
-          throw new InvalidParameterException(
-              "<algorithm_or_type> in querry (" + String.valueOf(querry) +
-              ") is empty");
-
-        selectProviders(service, algorithm, attribute, value, result, serviceProviders);
-        result.retainAll(serviceProviders); // eval next retaining found providers
-        if (result.isEmpty()) // no point continuing
-          break;
-      }
-
-    if (result.isEmpty())
-      return null;
-
-    return (Provider[]) result.toArray(new Provider[0]);
-  }
-
-  private static void selectProviders(String svc, String algo, String attr,
-                                      String val, LinkedHashSet providerSet,
-                                      LinkedHashSet result)
-  {
-    result.clear(); // ensure we start with an empty result set
-    for (Iterator i = providerSet.iterator(); i.hasNext(); )
-      {
-        Provider p = (Provider) i.next();
-        if (provides(p, svc, algo, attr, val))
-          result.add(p);
-      }
-  }
-
-  private static boolean provides(Provider p, String svc, String algo,
-                                  String attr, String val)
-  {
-    Iterator it;
-    String serviceDotAlgorithm = null;
-    String key = null;
-    String realVal;
-    boolean found = false;
-    // if <svc>.<algo> <attr> is in the set then so is <svc>.<algo>
-    // but it may be stored under an alias <algo>. resolve
-    outer: for (int r = 0; r < 3; r++) // guard against circularity
-      {
-        serviceDotAlgorithm = (svc+"."+String.valueOf(algo)).trim();
-        for (it = p.keySet().iterator(); it.hasNext(); )
-          {
-            key = (String) it.next();
-            if (key.equalsIgnoreCase(serviceDotAlgorithm)) // eureka
-              {
-                found = true;
-                break outer;
-              }
-            // it may be there but as an alias
-            if (key.equalsIgnoreCase(ALG_ALIAS + serviceDotAlgorithm))
-              {
-                algo = p.getProperty(key);
-                continue outer;
-              }
-            // else continue inner
-          }
-      }
-
-    if (!found)
-      return false;
-
-    // found a candidate for the querry.  do we have an attr to match?
-    if (val == null) // <service>.<algorithm> querry
-      return true;
-
-    // <service>.<algorithm> <attribute>; find the key entry that match
-    String realAttr;
-    int limit = serviceDotAlgorithm.length() + 1;
-    for (it = p.keySet().iterator(); it.hasNext(); )
-      {
-        key = (String) it.next();
-        if (key.length() <= limit)
-          continue;
-
-        if (key.substring(0, limit).equalsIgnoreCase(serviceDotAlgorithm+" "))
-          {
-            realAttr = key.substring(limit).trim();
-            if (! realAttr.equalsIgnoreCase(attr))
-              continue;
-
-            // eveything matches so far.  do the value
-            realVal = p.getProperty(key);
-            if (realVal == null)
-              return false;
-
-            realVal = realVal.trim();
-            // is it a string value?
-            if (val.equalsIgnoreCase(realVal))
-              return true;
-
-            // assume value is a number. cehck for greater-than-or-equal
-            return (new Integer(val).intValue() >= new Integer(realVal).intValue());
-          }
-      }
-
-    return false;
-  }
-}