/*
    * Copyright 2001-2004 The Apache Software Foundation.
    * 
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    * 
    *      http://www.apache.org/licenses/LICENSE-2.0
    * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.apache.mirae.j2me.xml.sax;
  
  import java.util.Enumeration;
  import java.util.Hashtable;
  import java.util.Vector;
  
  import org.xml.sax.Attributes;
  
  /***
   * This is an implementation of org.xml.sax.Attributes
   * @author Ias (iasandcb@tmax.co.kr)
   * 
   */
  public class AttributesImpl implements Attributes {
  
  	private Vector keys;
  	private Vector values;
  	private Vector types;
  	private Hashtable namespaces;
  	private Hashtable typeDeclarations;
  
      /***
       * The concrete constructor for Attributes
       * @param namespaces
       * @param defaultValues
       * @param typeDefinitions
       */
  	public AttributesImpl(Hashtable namespaces, Hashtable defaultValues, Hashtable typeDefinitions) {
  		this.namespaces = namespaces;
  		keys = new Vector();
  		values = new Vector();
  		types = new Vector();
  		this.typeDeclarations = typeDefinitions;
  		if (defaultValues != null) {
  			Enumeration enum = defaultValues.keys();
  
  			while (enum.hasMoreElements()) {
  				String key = (String) enum.nextElement();
  				add(key, getTypeFromDeclaration(key), (String) defaultValues.get(key));
  			}
  		}
  	}
  	
  	public String getTypeFromDeclaration(String key) {
  		String type = null;
  		if (typeDeclarations != null) {
  			type = (String) typeDeclarations.get(key);
  		}
  		if (type == null) {
  			type = "CDATA";
  		}
  		return type;
  	}
  	
  	public void add(String key, String type, String value) {
  		keys.addElement(key);
  		values.addElement(value);
  		types.addElement(type);
  	}
  	/***
  	 * @see org.xml.sax.Attributes#getLength()
  	 */
  	public int getLength() {
  		return keys.size();
  	}
  
  	private String getPrefix(String qName) {
  		String prefix;
  		int colonIndex = qName.indexOf(":");
  		if (colonIndex < 0) {
  			prefix = "";
  		} else {
  			prefix = qName.substring(0, colonIndex);
  		}
  		return prefix;
  	}
  
  	private String getLocalName(String qName) {
  		String localName;
  		int colonIndex = qName.indexOf(":");
  		if (colonIndex < 0) {
  			localName = qName;
  		} else {
 			localName = qName.substring(colonIndex + 1);
 		}
 		return localName;
 	}
 
 	/***
 	 * @see org.xml.sax.Attributes#getURI(int)
 	 */
 	public String getURI(int index) {
 		if (index >= keys.size()) {
 			return null;
 		}
 		String key = (String) keys.elementAt(index);
 		String uri = (String) namespaces.get(getPrefix(key));
 		if (uri == null) {
 			uri = "";
 		}
 		return uri;
 	}
 
 	/***
 	 * @see org.xml.sax.Attributes#getLocalName(int)
 	 */
 	public String getLocalName(int index) {
 		return getLocalName((String) keys.elementAt(index));
 	}
 
 	/***
 	 * @see org.xml.sax.Attributes#getQName(int)
 	 */
 	public String getQName(int index) {
 		return (String) keys.elementAt(index);
 	}
 
 	/***
 	 * @see org.xml.sax.Attributes#getType(int)
 	 */
 	public String getType(int index) {
 		return (String) types.elementAt(index);
 	}
 
 	/***
 	 * @see org.xml.sax.Attributes#getValue(int)
 	 */
 	public String getValue(int index) {
 		return (String) values.elementAt(index);
 	}
 
 	/***
 	 * @see org.xml.sax.Attributes#getIndex(java.lang.String, java.lang.String)
 	 */
 	public int getIndex(String uri, String localName) {
 		String prefix = null;
 		for (Enumeration uris = namespaces.elements(), prefixes = namespaces.keys(); uris.hasMoreElements();) {
 			String namespaceUri = (String) uris.nextElement();
 			String namespacePrefix = (String) prefixes.nextElement();
 			if (namespaceUri.equals(uri)) {
 				prefix = namespacePrefix;
 				break;
 			}
 		}
 		if (prefix == null) {
 			return -1;
 		}
 		String qName;
 		if (prefix.equals("")) {
 			qName = localName;
 		} else {
 			qName = prefix + ":" + localName;
 		}
 		return getIndex(qName);
 	}
 
 	/***
 	 * @see org.xml.sax.Attributes#getIndex(java.lang.String)
 	 */
 	public int getIndex(String qName) {
 		return keys.indexOf(qName);
 	}
 
 	/***
 	 * @see org.xml.sax.Attributes#getType(java.lang.String, java.lang.String)
 	 */
 	public String getType(String uri, String localName) {
 		return (String) types.elementAt(getIndex(uri, localName));
 	}
 
 	/***
 	 * @see org.xml.sax.Attributes#getType(java.lang.String)
 	 */
 	public String getType(String qName) {
 		return (String) types.elementAt(getIndex(qName));
 	}
 
 	/***
 	 * @see org.xml.sax.Attributes#getValue(java.lang.String, java.lang.String)
 	 */
 	public String getValue(String uri, String localName) {
 		return (String) values.elementAt(getIndex(uri, localName));
 	}
 
 	/***
 	 * @see org.xml.sax.Attributes#getValue(java.lang.String)
 	 */
 	public String getValue(String qName) {
 		return (String) values.elementAt(getIndex(qName));
 	}
 
 }