mirror of git://gcc.gnu.org/git/gcc.git
123 lines
3.3 KiB
Java
123 lines
3.3 KiB
Java
/* Namespaces.java -
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Copyright (C) 2004 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 gnu.xml.libxmlj.sax;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.Iterator;
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/**
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* Helper class for managing namespaces.
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*
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* @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
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*/
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class Namespaces
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{
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ArrayList stack = new ArrayList ();
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/**
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* Increments the tree depth.
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* This allocates a new potential namespace entry.
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*/
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void push ()
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{
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stack.add (null);
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}
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/**
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* Decrements the tree depth.
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* This removes namespaces defined at the extremity.
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*/
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void pop ()
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{
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stack.remove (stack.size() - 1);
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}
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/**
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* Searches for the namespace URI corresponding to the specified prefix.
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*/
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String getURI (String prefix)
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{
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for (int i = stack.size () - 1; i >= 0; i--)
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{
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HashMap ns = (HashMap) stack.get (i);
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if (ns != null && ns.containsKey (prefix))
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{
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String ret = (String) ns.get (prefix);
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return (ret == null) ? "" : ret;
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}
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}
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return "";
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}
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/**
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* Defines the specified prefix-URI mapping at the current depth in the
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* tree.
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*/
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void define (String prefix, String uri)
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{
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int index = stack.size () - 1;
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HashMap ns = (HashMap) stack.get (index);
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if (ns == null)
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{
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ns = new HashMap ();
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stack.set (index, ns);
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}
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ns.put (prefix, uri);
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}
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/**
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* Returns an iterator over the prefixes defined at the current depth.
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*/
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Iterator currentPrefixes ()
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{
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HashMap ns = (HashMap) stack.get (stack.size () - 1);
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if (ns == null)
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{
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return Collections.EMPTY_LIST.iterator ();
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}
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else
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{
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return ns.keySet ().iterator ();
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}
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}
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}
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