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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code 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 General Public License
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 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package com.sun.xml.internal.fastinfoset.stax.events ;

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

import javax.xml.namespace.NamespaceContext;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.events.Attribute;
import javax.xml.stream.events.Namespace;
import javax.xml.stream.events.StartElement;


public class StartElementEvent extends EventBase implements StartElement {

    private Map _attributes;
    private List _namespaces;
    private NamespaceContext _context = null;
    private QName _qname;

    public void reset() {
        if (_attributes != null) _attributes.clear();
        if (_namespaces != null) _namespaces.clear();
        if (_context != null) _context = null;
    }

    public StartElementEvent() {
        init();
    }

    public StartElementEvent(String prefix, String uri, String localpart) {
        init();
        if (uri == null) uri = "";
        if (prefix == null) prefix ="";
        _qname = new QName(uri, localpart, prefix);
        setEventType(START_ELEMENT);
    }

    public StartElementEvent(QName qname) {
        init();
        _qname = qname;
    }

    public StartElementEvent(StartElement startelement) {
        this(startelement.getName());
        addAttributes(startelement.getAttributes());
        addNamespaces(startelement.getNamespaces());
    }

    protected void init() {
        setEventType(XMLStreamConstants.START_ELEMENT);
        _attributes = new HashMap();
        _namespaces = new ArrayList();
    }

    // ---------------------methods defined by StartElement-----------------//
    
Get the name of this event
Returns:
the qualified name of this event/**
    * Get the name of this event
    * @return the qualified name of this event
    */
    public QName getName() {
        return _qname;
    }
    
Returns an Iterator of non-namespace declared attributes
returns an empty iterator if there are no attributes.  The
iterator must contain only implementations of the javax.xml.stream.Attribute
interface.   Attributes are fundamentally unordered and may not be reported
in any order.
Returns:
a readonly Iterator over Attribute interfaces, or an
empty iterator/**
    * Returns an Iterator of non-namespace declared attributes
    * returns an empty iterator if there are no attributes.  The
    * iterator must contain only implementations of the javax.xml.stream.Attribute
    * interface.   Attributes are fundamentally unordered and may not be reported
    * in any order.
    *
    * @return a readonly Iterator over Attribute interfaces, or an
    * empty iterator
    */
    public Iterator getAttributes() {
        if(_attributes != null){
            Collection coll = _attributes.values();
            return new ReadIterator(coll.iterator());
        }
        return EmptyIterator.getInstance();
    }

  
Returns an Iterator of namespaces declared on this element.
This Iterator does not contain previously declared namespaces
unless they appear on the current START_ELEMENT.
Therefore this list may contain redeclared namespaces and duplicate namespace
declarations. Use the getNamespaceContext() method to get the
current context of namespace declarations.
The iterator must contain only implementations of the
javax.xml.stream.Namespace interface.
A Namespace is an Attribute.  One
can iterate over a list of namespaces as a list of attributes.
However this method returns only the list of namespaces
declared on this START_ELEMENT and does not
include the attributes declared on this START_ELEMENT.
Returns:
a readonly Iterator over Namespace interfaces, or an
empty iterator if there are no namespaces./**
   * Returns an Iterator of namespaces declared on this element.
   * This Iterator does not contain previously declared namespaces
   * unless they appear on the current START_ELEMENT.
   * Therefore this list may contain redeclared namespaces and duplicate namespace
   * declarations. Use the getNamespaceContext() method to get the
   * current context of namespace declarations.
   *
   * <p>The iterator must contain only implementations of the
   * javax.xml.stream.Namespace interface.
   *
   * <p>A Namespace is an Attribute.  One
   * can iterate over a list of namespaces as a list of attributes.
   * However this method returns only the list of namespaces
   * declared on this START_ELEMENT and does not
   * include the attributes declared on this START_ELEMENT.
   *
   * @return a readonly Iterator over Namespace interfaces, or an
   * empty iterator if there are no namespaces.
   *
   */
    public Iterator getNamespaces() {
        if(_namespaces != null){
            return new ReadIterator(_namespaces.iterator());
        }
        return EmptyIterator.getInstance();
    }

  
Returns the attribute referred to by this name
Params:
qname – the qname of the desired name
Returns:
the attribute corresponding to the name value or null/**
   * Returns the attribute referred to by this name
   * @param qname the qname of the desired name
   * @return the attribute corresponding to the name value or null
   */
    public Attribute getAttributeByName(QName qname) {
        if(qname == null)
            return null;
        return (Attribute)_attributes.get(qname);
    }

    
Gets a read-only namespace context. If no context is
available this method will return an empty namespace context.
The NamespaceContext contains information about all namespaces
in scope for this StartElement.
Returns:
the current namespace context/** Gets a read-only namespace context. If no context is
     * available this method will return an empty namespace context.
     * The NamespaceContext contains information about all namespaces
     * in scope for this StartElement.
     *
     * @return the current namespace context
     */
    public NamespaceContext getNamespaceContext() {
        return _context;
    }
// ---------------------end of methods defined by StartElement-----------------//

    public void setName(QName qname) {
        this._qname = qname;
    }


    public String getNamespace(){
        return _qname.getNamespaceURI();
    }

    
Gets the value that the prefix is bound to in the
context of this element.  Returns null if
the prefix is not bound in this context
Params:
prefix – the prefix to lookup
Returns:
the uri bound to the prefix or null/**
    * Gets the value that the prefix is bound to in the
    * context of this element.  Returns null if
    * the prefix is not bound in this context
    * @param prefix the prefix to lookup
    * @return the uri bound to the prefix or null
    */
    public String getNamespaceURI(String prefix) {
        //first check if the URI was supplied when creating this startElement event
        if( getNamespace() != null ) return getNamespace();
        //else check the namespace context
        if(_context != null)
            return _context.getNamespaceURI(prefix);
        return null;
    }

    public String toString() {
        final StringBuilder sb = new StringBuilder(64);

        sb.append('<').append(nameAsString());

        if(_attributes != null){
            Iterator it = this.getAttributes();
            Attribute attr = null;
            while(it.hasNext()){
                attr = (Attribute)it.next();
                sb.append(' ').append(attr.toString());
            }
        }

        if(_namespaces != null){
            Iterator it = _namespaces.iterator();
            Namespace attr = null;
            while(it.hasNext()){
                attr = (Namespace)it.next();
                sb.append(' ').append(attr.toString());
            }
        }
        sb.append('>');
        return sb.toString();
    }

    
Return this event as String
Returns:
String Event returned as string./** Return this event as String
     * @return String Event returned as string.
     */
    public String nameAsString() {
        if("".equals(_qname.getNamespaceURI()))
            return _qname.getLocalPart();
        if(_qname.getPrefix() != null)
            return "['" + _qname.getNamespaceURI() + "']:" + _qname.getPrefix() + ":" + _qname.getLocalPart();
        else
            return "['" + _qname.getNamespaceURI() + "']:" + _qname.getLocalPart();
    }


    public void setNamespaceContext(NamespaceContext context) {
        _context = context;
    }

    public void addAttribute(Attribute attr){
        _attributes.put(attr.getName(),attr);
    }

    public void addAttributes(Iterator attrs){
        if(attrs != null) {
            while(attrs.hasNext()){
                Attribute attr = (Attribute)attrs.next();
                _attributes.put(attr.getName(),attr);
            }
        }
    }

    public void addNamespace(Namespace namespace){
        if(namespace != null) {
            _namespaces.add(namespace);
        }
    }

    public void addNamespaces(Iterator namespaces){
        if(namespaces != null) {
            while(namespaces.hasNext()){
                Namespace namespace = (Namespace)namespaces.next();
                _namespaces.add(namespace);
            }
        }
    }

}