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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
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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
 * version 2 for more details (a copy is included in the LICENSE file that
 * 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.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * THIS FILE WAS MODIFIED BY SUN MICROSYSTEMS, INC.
 */

package com.sun.xml.internal.fastinfoset.stax.events ;

import javax.xml.stream.Location;
import javax.xml.stream.events.XMLEvent;
import javax.xml.stream.events.Characters;
import javax.xml.stream.events.EndElement;
import javax.xml.stream.events.StartElement;
import javax.xml.namespace.QName;
import java.io.Writer;
import com.sun.xml.internal.fastinfoset.CommonResourceBundle;


public abstract class EventBase implements XMLEvent {

    /* Event type this event corresponds to */
    protected int _eventType;
    protected Location _location = null;

    public EventBase() {

    }

    public EventBase(int eventType) {
        _eventType = eventType;
    }

    
Returns an integer code for this event.
/**
    * Returns an integer code for this event.
    */
    public int getEventType() {
        return _eventType;
    }

    protected void setEventType(int eventType){
        _eventType = eventType;
    }


    public boolean isStartElement() {
        return _eventType == START_ELEMENT;
    }

    public boolean isEndElement() {
        return _eventType == END_ELEMENT;
    }

    public boolean isEntityReference() {
        return _eventType == ENTITY_REFERENCE;
    }

    public boolean isProcessingInstruction() {
        return _eventType == PROCESSING_INSTRUCTION;
    }

    public boolean isStartDocument() {
        return _eventType == START_DOCUMENT;
    }

    public boolean isEndDocument() {
        return _eventType == END_DOCUMENT;
    }

  
Return the location of this event.  The Location
returned from this method is non-volatile and
will retain its information.
See Also:
Location/**
   * Return the location of this event.  The Location
   * returned from this method is non-volatile and
   * will retain its information.
   * @see javax.xml.stream.Location
   */
    public Location getLocation(){
        return _location;
    }

    public void setLocation(Location loc){
        _location = loc;
    }
    public String getSystemId() {
        if(_location == null )
            return "";
        else
            return _location.getSystemId();
    }

    
Returns this event as Characters, may result in
a class cast exception if this event is not Characters.
/** Returns this event as Characters, may result in
     * a class cast exception if this event is not Characters.
     */
    public Characters asCharacters() {
        if (isCharacters()) {
            return (Characters)this;
        } else
            throw new ClassCastException(CommonResourceBundle.getInstance().getString("message.charactersCast", new Object[]{getEventTypeString()}));
    }

    
Returns this event as an end  element event, may result in
a class cast exception if this event is not a end element.
/** Returns this event as an end  element event, may result in
     * a class cast exception if this event is not a end element.
     */
    public EndElement asEndElement() {
        if (isEndElement()) {
            return (EndElement)this;
        } else
            throw new ClassCastException(CommonResourceBundle.getInstance().getString("message.endElementCase", new Object[]{getEventTypeString()}));
    }

  
Returns this event as a start element event, may result in
a class cast exception if this event is not a start element.
/**
   * Returns this event as a start element event, may result in
   * a class cast exception if this event is not a start element.
   */
    public StartElement asStartElement() {
        if (isStartElement()) {
            return (StartElement)this;
        } else
            throw new ClassCastException(CommonResourceBundle.getInstance().getString("message.startElementCase", new Object[]{getEventTypeString()}));
    }

    
This method is provided for implementations to provide
optional type information about the associated event.
It is optional and will return null if no information
is available.
/**
    * This method is provided for implementations to provide
    * optional type information about the associated event.
    * It is optional and will return null if no information
    * is available.
    */
    public QName getSchemaType() {
        return null;
    }

    
A utility function to check if this event is an Attribute.
See Also:
Attribute/** A utility function to check if this event is an Attribute.
     * @see javax.xml.stream.events.Attribute
     */
    public boolean isAttribute() {
        return _eventType == ATTRIBUTE;
    }

    
A utility function to check if this event is Characters.
See Also:
Characters/** A utility function to check if this event is Characters.
     * @see javax.xml.stream.events.Characters
     */
    public boolean isCharacters() {
        return _eventType == CHARACTERS;
    }

    
A utility function to check if this event is a Namespace.
See Also:
Namespace/** A utility function to check if this event is a Namespace.
     * @see javax.xml.stream.events.Namespace
     */
    public boolean isNamespace() {
        return _eventType == NAMESPACE;
    }


    
This method will write the XMLEvent as per the XML 1.0 specification as Unicode characters.
No indentation or whitespace should be outputted.
Any user defined event type SHALL have this method
called when being written to on an output stream.
Built in Event types MUST implement this method,
but implementations MAY choose not call these methods
for optimizations reasons when writing out built in
Events to an output stream.
The output generated MUST be equivalent in terms of the
infoset expressed.
Params:
writer – The writer that will output the data
Throws:
XMLStreamException – if there is a fatal error writing the event/**
    * This method will write the XMLEvent as per the XML 1.0 specification as Unicode characters.
    * No indentation or whitespace should be outputted.
    *
    * Any user defined event type SHALL have this method
    * called when being written to on an output stream.
    * Built in Event types MUST implement this method,
    * but implementations MAY choose not call these methods
    * for optimizations reasons when writing out built in
    * Events to an output stream.
    * The output generated MUST be equivalent in terms of the
    * infoset expressed.
    *
    * @param writer The writer that will output the data
    * @throws XMLStreamException if there is a fatal error writing the event
    */
    public void writeAsEncodedUnicode(Writer writer) throws javax.xml.stream.XMLStreamException {
    }

    private String getEventTypeString() {
        switch (_eventType){
            case START_ELEMENT:
                return "StartElementEvent";
            case END_ELEMENT:
                return "EndElementEvent";
            case PROCESSING_INSTRUCTION:
                return "ProcessingInstructionEvent";
            case CHARACTERS:
                return "CharacterEvent";
            case COMMENT:
                return "CommentEvent";
            case START_DOCUMENT:
                return "StartDocumentEvent";
            case END_DOCUMENT:
                return "EndDocumentEvent";
            case ENTITY_REFERENCE:
                return "EntityReferenceEvent";
            case ATTRIBUTE:
                return "AttributeBase";
            case DTD:
                return "DTDEvent";
            case CDATA:
                return "CDATA";
        }
        return "UNKNOWN_EVENT_TYPE";
    }

}