mirror of git://gcc.gnu.org/git/gcc.git
524 lines
15 KiB
Java
524 lines
15 KiB
Java
/* CompoundName.java --
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Copyright (C) 2001, 2004, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.naming;
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import gnu.java.lang.CPStringBuilder;
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import java.io.IOException;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutputStream;
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import java.io.Serializable;
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import java.util.Enumeration;
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import java.util.NoSuchElementException;
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import java.util.Properties;
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import java.util.Vector;
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/**
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* Represents hierarchical names from the single namespace. For instance,
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* the path /home/audriusa/classpath/file.txt is the compound name, using
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* the filesystem namespace.
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*
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* @author Tom Tromey (tromey@redhat.com)
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* @date May 16, 2001
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*
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* FIXME: this class is underspecified. For instance, the `flat'
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* direction is never described. If it means that the CompoundName
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* can only have a single element, then the Enumeration-based
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* constructor ought to throw InvalidNameException.
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*
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* @since 1.3
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*/
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public class CompoundName implements Name, Cloneable, Serializable
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{
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private static final long serialVersionUID = 3513100557083972036L;
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private CompoundName (Properties syntax)
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{
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elts = new Vector<String> ();
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mySyntax = syntax;
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initializeSyntax ();
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}
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protected CompoundName (Enumeration<String> comps, Properties syntax)
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{
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elts = new Vector<String> ();
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mySyntax = syntax;
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initializeSyntax ();
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try
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{
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while (comps.hasMoreElements ())
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elts.add (comps.nextElement ());
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}
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catch (NoSuchElementException ignore)
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{
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}
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}
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public CompoundName (String n, Properties syntax)
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throws InvalidNameException
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{
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elts = new Vector<String> ();
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mySyntax = syntax;
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initializeSyntax ();
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StringBuilder new_element = new StringBuilder ();
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int i = 0;
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// QUOTE==null means no quoting right now. When it is set it is
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// the value of the closing quote.
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String quote = null;
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while (i < n.length ())
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{
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String special = isSpecial (n, i);
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if (special == escape && escape != null)
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{
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if (n.length () == i + special.length ())
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{
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// A trailing escape is treated as itself.
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new_element.append (special);
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i += special.length ();
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}
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else
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{
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String eSpecial = isSpecial (n, i + special.length ());
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if (eSpecial != null)
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{
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// Treat the escape as an escape.
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new_element.append (eSpecial);
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i += special.length () + eSpecial.length ();
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}
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else
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{
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// Treat the escape as itself.
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new_element.append (special);
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i += special.length ();
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}
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continue;
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}
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}
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else if (quote != null)
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{
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// It is safe to use == here.
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if (quote == special)
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{
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// Quotes must surround a complete component.
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if (i + quote.length () < n.length ()
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&& ! n.startsWith (separator, i + quote.length ()))
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throw new InvalidNameException ("close quote before end of component");
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elts.add (new_element.toString ());
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new_element.setLength (0);
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i += quote.length ();
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quote = null;
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continue;
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}
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// Otherwise, fall through.
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}
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// Quotes are only special at the start of a component.
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else if (new_element.length () == 0
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&& special == beginQuote
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&& beginQuote != null)
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{
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quote = endQuote;
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i += special.length ();
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continue;
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}
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else if (new_element.length () == 0
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&& special == beginQuote2
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&& beginQuote2 != null)
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{
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quote = endQuote2;
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i += special.length ();
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continue;
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}
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else if (direction != FLAT && special == separator)
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{
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elts.add (new_element.toString ());
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new_element.setLength (0);
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i += special.length ();
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continue;
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}
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// Nothing in particular, so try the next character.
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new_element.append (n.charAt (i));
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++i;
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}
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if (new_element.length () != 0)
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elts.add (new_element.toString ());
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if (direction == RIGHT_TO_LEFT)
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{
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// Reverse the order of the elements.
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int len = elts.size ();
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for (i = 0; i < len / 2; ++i)
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{
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String t = elts.set (i, elts.get (len - i - 1));
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elts.set (len - i - 1, t);
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}
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}
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// Error checking.
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if (quote != null)
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throw new InvalidNameException ("unterminated quote");
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}
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public Name add (int posn, String comp) throws InvalidNameException
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{
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elts.add (posn, comp);
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return this;
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}
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public Name add (String comp) throws InvalidNameException
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{
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elts.add (comp);
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return this;
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}
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public Name addAll (int posn, Name n) throws InvalidNameException
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{
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Enumeration<String> e = n.getAll ();
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try
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{
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while (e.hasMoreElements ())
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{
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elts.add (posn, e.nextElement ());
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++posn;
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}
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}
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catch (NoSuchElementException ignore)
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{
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}
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return this;
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}
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public Name addAll (Name suffix) throws InvalidNameException
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{
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Enumeration<String> e = suffix.getAll ();
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try
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{
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while (e.hasMoreElements ())
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elts.add (e.nextElement ());
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}
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catch (NoSuchElementException ignore)
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{
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}
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return this;
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}
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public Object clone ()
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{
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return new CompoundName (elts.elements (), mySyntax);
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}
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public int compareTo (Object obj)
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{
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if (! (obj instanceof CompoundName))
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throw new ClassCastException ("CompoundName.compareTo() expected CompoundName");
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CompoundName cn = (CompoundName) obj;
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int last = Math.min (cn.elts.size (), elts.size ());
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for (int i = 0; i < last; ++i)
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{
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String f = canonicalize (elts.get (i));
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int comp = f.compareTo (canonicalize (cn.elts.get (i)));
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if (comp != 0)
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return comp;
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}
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return elts.size () - cn.elts.size ();
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}
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public boolean endsWith (Name n)
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{
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if (! (n instanceof CompoundName))
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return false;
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CompoundName cn = (CompoundName) n;
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if (cn.elts.size () > elts.size ())
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return false;
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int delta = elts.size () - cn.elts.size ();
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for (int i = 0; i < cn.elts.size (); ++i)
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{
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String f = canonicalize (elts.get (delta + i));
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if (! f.equals (canonicalize (cn.elts.get (i))))
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return false;
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}
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return true;
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}
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public boolean equals (Object obj)
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{
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if (! (obj instanceof CompoundName))
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return false;
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return compareTo (obj) == 0;
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}
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public String get (int posn)
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{
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return elts.get (posn);
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}
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public Enumeration<String> getAll ()
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{
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return elts.elements ();
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}
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public Name getPrefix (int posn)
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{
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CompoundName cn = new CompoundName (mySyntax);
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for (int i = 0; i < posn; ++i)
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cn.elts.add (elts.get (i));
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return cn;
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}
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public Name getSuffix (int posn)
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{
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if (posn > elts.size ())
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throw new ArrayIndexOutOfBoundsException (posn);
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CompoundName cn = new CompoundName (mySyntax);
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for (int i = posn; i < elts.size (); ++i)
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cn.elts.add (elts.get (i));
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return cn;
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}
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public int hashCode ()
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{
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int h = 0;
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for (int i = 0; i < elts.size (); ++i)
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h += canonicalize (elts.get (i)).hashCode ();
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return h;
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}
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public boolean isEmpty ()
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{
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return elts.isEmpty ();
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}
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public Object remove (int posn) throws InvalidNameException
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{
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return elts.remove (posn);
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}
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public int size ()
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{
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return elts.size ();
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}
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public boolean startsWith (Name n)
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{
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if (! (n instanceof CompoundName))
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return false;
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CompoundName cn = (CompoundName) n;
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if (cn.elts.size () > elts.size ())
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return false;
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for (int i = 0; i < cn.elts.size (); ++i)
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{
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String f = canonicalize (elts.get (i));
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if (! f.equals (canonicalize (cn.elts.get (i))))
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return false;
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}
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return true;
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}
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// If ELEMENT starts with some meta-sequence at OFFSET, then return
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// the string representing the meta-sequence. Otherwise return
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// null.
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private String isSpecial (String element, int offset)
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{
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String special = null;
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if (separator != null && element.startsWith (separator, offset))
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special = separator;
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else if (escape != null && element.startsWith (escape, offset))
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special = escape;
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else if (beginQuote != null && element.startsWith (beginQuote, offset))
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special = beginQuote;
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else if (endQuote != null && element.startsWith (endQuote, offset))
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special = endQuote;
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else if (beginQuote2 != null
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&& element.startsWith (beginQuote2, offset))
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special = beginQuote2;
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else if (endQuote2 != null && element.startsWith (endQuote2, offset))
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special = endQuote2;
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return special;
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}
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public String toString ()
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{
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CPStringBuilder result = new CPStringBuilder ();
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int size = elts.size ();
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for (int i = 0; i < size; ++i)
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{
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// Find the appropriate element. FIXME: not clear what FLAT
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// means.
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int offset = (direction == RIGHT_TO_LEFT) ? (size - i - 1) : i;
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String element = elts.get (offset);
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if (i > 0
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|| (i == size - 1 && element.equals ("")))
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result.append (separator);
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int k = 0;
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while (k < element.length ())
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{
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String special = isSpecial (element, k);
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if (special != null)
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{
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result.append (escape);
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result.append (special);
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k += special.length ();
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}
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else
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{
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result.append (element.charAt (k));
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++k;
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}
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}
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}
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return result.toString ();
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}
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// This canonicalizes a String, based on the syntax, for comparison
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// or other similar purposes.
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private String canonicalize (String element)
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{
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String ret = element;
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if (ignoreCase)
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ret = ret.toLowerCase ();
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if (trimBlanks)
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{
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int first = 0;
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while (first < ret.length ()
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&& Character.isWhitespace (ret.charAt (first)))
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++first;
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int last = ret.length () - 1;
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while (last >= first
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&& Character.isWhitespace (ret.charAt (last)))
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--last;
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ret = ret.substring (first, last);
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}
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return ret;
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}
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// This initializes all the syntax variables. This seems easier
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// than re-querying the properties every time. We're allowed to do
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// this because the spec says that subclasses should consider the
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// syntax as being read-only.
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private void initializeSyntax ()
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{
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String t = mySyntax.getProperty ("jndi.syntax.direction", "flat");
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if (t.equals ("right_to_left"))
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this.direction = RIGHT_TO_LEFT;
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else if (t.equals ("left_to_right"))
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this.direction = LEFT_TO_RIGHT;
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else
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{
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// If we don't recognize it, default to flat.
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this.direction = FLAT;
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}
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// This is required unless the direction is FLAT. Unfortunately
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// there is no way to report this error.
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this.separator = mySyntax.getProperty ("jndi.syntax.separator", "");
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this.ignoreCase
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= Boolean.valueOf (mySyntax.getProperty ("jndi.syntax.ignorecase",
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"false")).booleanValue ();
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this.escape = mySyntax.getProperty ("jndi.syntax.escape", null);
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this.beginQuote = mySyntax.getProperty ("jndi.syntax.beginquote", null);
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this.endQuote = mySyntax.getProperty ("jndi.syntax.endquote",
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this.beginQuote);
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this.beginQuote2 = mySyntax.getProperty ("jndi.syntax.beginquote2",
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null);
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this.endQuote2 = mySyntax.getProperty ("jndi.syntax.endquote2",
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this.beginQuote2);
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this.trimBlanks
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= Boolean.valueOf (mySyntax.getProperty ("jndi.syntax.trimblanks",
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"false")).booleanValue ();
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}
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private void readObject(ObjectInputStream s)
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throws IOException, ClassNotFoundException
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{
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mySyntax = (Properties) s.readObject();
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int count = s.readInt();
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elts = new Vector<String>(count);
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for (int i = 0; i < count; i++)
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elts.addElement((String) s.readObject());
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}
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private void writeObject(ObjectOutputStream s)
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throws IOException
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{
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s.writeObject(mySyntax);
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s.writeInt(elts.size());
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for (int i = 0; i < elts.size(); i++)
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s.writeObject(elts.elementAt(i));
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}
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// The spec specifies this but does not document it in any way (it
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// is a package-private class). It is useless as far as I can tell.
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// So we ignore it.
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// protected transient NameImpl impl;
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protected transient Properties mySyntax;
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// The actual elements.
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private transient Vector<String> elts;
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// The following are all used for syntax.
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private transient int direction;
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private transient String separator;
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private transient boolean ignoreCase;
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private transient String escape;
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private transient String beginQuote;
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private transient String endQuote;
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private transient String beginQuote2;
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private transient String endQuote2;
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private transient boolean trimBlanks;
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// We didn't need these for parsing, so they are gone.
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// private transient String avaSeparator;
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// private transient String typevalSeparator;
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private static final int RIGHT_TO_LEFT = -1;
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private static final int LEFT_TO_RIGHT = 1;
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private static final int FLAT = 0;
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}
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