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This is the master POM file for Oracle's Implementation of the JSF 2.2 Specification.
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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
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 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
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 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
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 * Copyright 2005-2007 The Apache Software Foundation
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 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
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 *
 *     http://www.apache.org/licenses/LICENSE-2.0
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package com.sun.faces.facelets.compiler;

import com.sun.faces.facelets.tag.TagLibrary;

import java.util.ArrayList;
import java.util.List;

/**
 * @author Jacob Hookom
 * @version $Id: NamespaceManager.java 8384 2010-05-17 14:59:38Z jdlee $
 */
final class NamespaceManager {

    private final static class NS {
        public final String prefix;

        public final String namespace;

        public NS(String prefix, String ns) {
            this.prefix = prefix;
            this.namespace = ns;
        }
    }

    private final List namespaces;

    /**
     * 
     */
    public NamespaceManager() {
        this.namespaces = new ArrayList();
    }

    public void reset() {
        this.namespaces.clear();
    }

    public void pushNamespace(String prefix, String namespace) {
        NS ns = new NS(prefix, namespace);
        this.namespaces.add(0, ns);
    }

    public String getNamespace(String prefix) {
        NS ns = null;
        for (int i = 0; i < this.namespaces.size(); i++) {
            ns = (NS) this.namespaces.get(i);
            if (ns.prefix.equals(prefix)) {
                return ns.namespace;
            }
        }
        return null;
    }

    public void popNamespace(String prefix) {
        NS ns = null;
        for (int i = 0; i < this.namespaces.size(); i++) {
            ns = (NS) this.namespaces.get(i);
            if (ns.prefix.equals(prefix)) {
                this.namespaces.remove(i);
                return;
            }
        }
    }
    
    public final NamespaceUnit toNamespaceUnit(TagLibrary library) {
        NamespaceUnit unit = new NamespaceUnit(library);
        if (this.namespaces.size() > 0) {
            NS ns = null;
            for (int i = this.namespaces.size() - 1; i >= 0; i--) {
                ns = (NS) this.namespaces.get(i);
                unit.setNamespace(ns.prefix, ns.namespace);
            }
        }
        return unit;
    }

}