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/**
 * easySchema - easyWSDL toolbox Platform.
 * Copyright (c) 2008,  eBM Websourcing
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the University of California, Berkeley nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
 * EXPRESS 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 REGENTS AND 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.
 */
package org.ow2.easywsdl.schema.api.extensions;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import javax.xml.XMLConstants;

import com.sun.xml.bind.marshaller.NamespacePrefixMapper;

/**
 * @author Nicolas Salatge - eBM WebSourcing
 */
public class NamespaceMapperImpl extends NamespacePrefixMapper{

    /**
     * Map: key = prefix - value = namespaceUri
     */
    public Map ns = new HashMap();

    public Map getNamespaces() {
		return ns;
	}

	public NamespaceMapperImpl(){
    	super();
    	addNamespace(XMLConstants.XML_NS_PREFIX, XMLConstants.XML_NS_URI);
 //   	addNamespace(XMLConstants.XMLNS_ATTRIBUTE, XMLConstants.XMLNS_ATTRIBUTE_NS_URI);
    }
    
	// TODO: This constructor should be replaced by a constructor using a Map
	public NamespaceMapperImpl(String[] initialNamespaces) {
		this();
		try {

			for (int i = 0; i < initialNamespaces.length; i++) {

				String prefix = initialNamespaces[i++];
				// TODO: check array size to prevent ArrayIndexOutOfBoundsException
				String namespace = initialNamespaces[i];

				this.ns.put(namespace, prefix);
			}
		}
		catch (Exception e) {
			System.out
					.println("Error while initialising custom namespaces. Using default namespaces.");
			this.ns.clear();
		}

	}

	public void addNamespace(final String prefix, final String namespaceUri) {
    	if (!"".equals(prefix)){
        	this.ns.put(prefix,namespaceUri);
    	}
    }
    
    public String getNamespaceURI(final String prefix) {
        return this.ns.get(prefix);
    }

    @Override
	public String[] getPreDeclaredNamespaceUris() {

		String[] custNS = new String[this.ns.size() * 2];

		Iterator it = this.ns.keySet().iterator();

		int i = 0;
		while (it.hasNext()) {
			String ns = it.next();
			String prefix = this.ns.get(ns);

			custNS[i++] = prefix;
			custNS[i++] = ns;
		}
		return custNS;
	}

    @Override
	public String getPreferredPrefix(String namespaceUri, String suggestion,
			boolean requirePrefix) {

		String res = getPrefix(namespaceUri);
		if (res != null){
			return res;
		}

		return suggestion;
	}

    // from javax.xml.namespace.NamespaceContext
    public String getPrefix(final String namespaceURI) {
        String res = null;
        for (final Entry entry : this.ns.entrySet()) {
            if (entry.getValue().equals(namespaceURI)) {
                res = entry.getKey();
                break;
            }
        }
        
        return res;
    }

    public Iterator getPrefixes(final String namespaceURI) {
        final List res = new ArrayList();
        for (final Entry entry : this.ns.entrySet()) {
            if (entry.getValue().equals(namespaceURI)) {
                res.add(entry.getKey());
            }
        }
        return res.iterator();
    }

    @Override
    public String toString() {
        final StringBuffer res = new StringBuffer();
        for (final Entry entry : this.ns.entrySet()) {
            res.append("xmlns:");
            res.append(entry.getKey());
            res.append("=");
            res.append(entry.getValue());
            res.append(" \n");
        }
        return res.toString();
    }
}