/* Copyright 2002-2005 Elliotte Rusty Harold
This library is free software; you can redistribute it and/or modify
it under the terms of version 2.1 of the GNU Lesser General Public
License as published by the Free Software Foundation.
This library 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
You can contact Elliotte Rusty Harold by sending e-mail to
[email protected]. Please include the word "XOM" in the
subject line. The XOM home page is located at http://www.xom.nu/
*/
package nu.xom;
import java.util.ArrayList;
import java.util.HashMap;
/**
* <p>
* The <code>Namespaces</code> container is a read-only list
* used to hold the additional namespace declarations of an
* element. It provides indexed access for convenience,
* but the order is neither predictable nor reproducible,
* and has no meaning.
* </p>
*
* @author Elliotte Rusty Harold
* @version 1.1b3
*/
class Namespaces {
private HashMap namespaces = new HashMap(1);
private ArrayList prefixes = new ArrayList(1);
void put(String prefix, String URI) {
namespaces.put(prefix, URI);
prefixes.remove(prefix);
prefixes.add(prefix);
}
void remove(String prefix) {
if (prefix == null) prefix = "";
namespaces.remove(prefix);
prefixes.remove(prefix);
}
/**
* <p>
* Return the URI associated with a prefix, as determined
* by the namespaces stored in this list. This method
* returns null if the prefix is not found in the list.
* </p>
*
* @param prefix the prefix whose URI is desired
*
* @return the namespace URI for this prefix, or null if this
* prefix is not not mapped to a URI by these namespace
* declarations
*/
String getURI(String prefix) {
return (String) (namespaces.get(prefix));
}
// This violates encapsulation. Don't change the
// array returned.
ArrayList getPrefixes() {
return this.prefixes;
}
Namespaces copy() {
Namespaces result = new Namespaces();
// shallow copies work here because these collections only
// contain immutable strings
result.namespaces = (HashMap) this.namespaces.clone();
result.prefixes = (ArrayList) this.prefixes.clone();
return result;
}
int size() {
return prefixes.size();
}
String getPrefix(int i) {
return (String) prefixes.get(i);
}
}
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