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- /*--
-
- $Id: NamespaceStack.java,v 1.14 2007/11/10 05:29:01 jhunter Exp $
-
- Copyright (C) 2000-2007 Jason Hunter & Brett McLaughlin.
- 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 disclaimer that follows
- these conditions in the documentation and/or other materials
- provided with the distribution.
-
- 3. The name "JDOM" must not be used to endorse or promote products
- derived from this software without prior written permission. For
- written permission, please contact <request_AT_jdom_DOT_org>.
-
- 4. Products derived from this software may not be called "JDOM", nor
- may "JDOM" appear in their name, without prior written permission
- from the JDOM Project Management <request_AT_jdom_DOT_org>.
-
- In addition, we request (but do not require) that you include in the
- end-user documentation provided with the redistribution and/or in the
- software itself an acknowledgement equivalent to the following:
- "This product includes software developed by the
- JDOM Project (http://www.jdom.org/)."
- Alternatively, the acknowledgment may be graphical using the logos
- available at http://www.jdom.org/images/logos.
-
- 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 JDOM AUTHORS OR THE PROJECT
- 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 JDOM Project and was originally
- created by Jason Hunter <jhunter_AT_jdom_DOT_org> and
- Brett McLaughlin <brett_AT_jdom_DOT_org>. For more information
- on the JDOM Project, please see <http://www.jdom.org/>.
-
- */
- package org.jdom.output;
-
- import java.util.*;
-
- import org.jdom.Namespace;
-
- /**
- * A non-public utility class used by both <code>{@link XMLOutputter}</code> and
- * <code>{@link SAXOutputter}</code> to manage namespaces in a JDOM Document
- * during output.
- *
- * @version $Revision: 1.14 $, $Date: 2007/11/10 05:29:01 $
- * @author Elliotte Rusty Harolde
- * @author Fred Trimble
- * @author Brett McLaughlin
- */
- class NamespaceStack {
-
- private static final String CVS_ID =
- "@(#) $RCSfile: NamespaceStack.java,v $ $Revision: 1.14 $ $Date: 2007/11/10 05:29:01 $ $Name: jdom_1_1 $";
-
- /** The prefixes available */
- private Stack prefixes;
-
- /** The URIs available */
- private Stack uris;
-
- /**
- * This creates the needed storage.
- */
- NamespaceStack() {
- prefixes = new Stack();
- uris = new Stack();
- }
-
- /**
- * This will add a new <code>{@link Namespace}</code>
- * to those currently available.
- *
- * @param ns <code>Namespace</code> to add.
- */
- public void push(Namespace ns) {
- prefixes.push(ns.getPrefix());
- uris.push(ns.getURI());
- }
-
- /**
- * This will remove the topmost (most recently added)
- * <code>{@link Namespace}</code>, and return its prefix.
- *
- * @return <code>String</code> - the popped namespace prefix.
- */
- public String pop() {
- String prefix = (String)prefixes.pop();
- uris.pop();
-
- return prefix;
- }
-
- /**
- * This returns the number of available namespaces.
- *
- * @return <code>int</code> - size of the namespace stack.
- */
- public int size() {
- return prefixes.size();
- }
-
- /**
- * Given a prefix, this will return the namespace URI most
- * rencently (topmost) associated with that prefix.
- *
- * @param prefix <code>String</code> namespace prefix.
- * @return <code>String</code> - the namespace URI for that prefix.
- */
- public String getURI(String prefix) {
- int index = prefixes.lastIndexOf(prefix);
- if (index == -1) {
- return null;
- }
- String uri = (String)uris.elementAt(index);
- return uri;
- }
-
- /**
- * This will print out the size and current stack, from the
- * most recently added <code>{@link Namespace}</code> to
- * the "oldest," all to <code>System.out</code>.
- */
- public String toString() {
- StringBuffer buf = new StringBuffer();
- String sep = System.getProperty("line.separator");
- buf.append("Stack: " + prefixes.size() + sep);
- for (int i = 0; i < prefixes.size(); i++) {
- buf.append(prefixes.elementAt(i) + "&" + uris.elementAt(i) + sep);
- }
- return buf.toString();
- }
- }
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