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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package com.sun.xml.internal.stream.events ;

import javax.xml.stream.events.Characters;
import java.io.Writer;
import java.io.IOException;
import javax.xml.stream.events.XMLEvent;
import com.sun.org.apache.xerces.internal.util.XMLChar;

Implementation of Character event.
Author:
Neeraj Bajaj, Sun Microsystems, K.Venugopal, Sun Microsystems/** Implementation of Character event.
 *
 *@author Neeraj Bajaj, Sun Microsystems
 *@author K.Venugopal, Sun Microsystems
 *
 */

public class CharacterEvent extends DummyEvent
implements Characters {
    /* data */
    private String fData;
    /*true if fData is CData */
    private boolean fIsCData;
    /* true if fData is ignorableWhitespace*/
    private boolean fIsIgnorableWhitespace;
    /* true if fData contet is whitespace*/
    private boolean fIsSpace = false;
    /*used to prevent scanning of  data multiple times */
    private boolean fCheckIfSpaceNeeded = true;

    public CharacterEvent() {
        fIsCData = false;
        init();
    }

    
Params:
data – Character Data./**
     *
     * @param data Character Data.
     */
    public CharacterEvent(String data) {
        fIsCData = false;
        init();
        fData = data;
    }

    
Params:
data – Character Data.
flag – true if CData/**
     *
     * @param data Character Data.
     * @param flag true if CData
     */
    public CharacterEvent(String data, boolean flag) {
        init();
        fData = data;
        fIsCData = flag;
    }

    
Params:
data – Character Data.
flag – true if CData
isIgnorableWhiteSpace – true if data is ignorable whitespace./**
     *
     * @param data Character Data.
     * @param flag true if CData
     * @param isIgnorableWhiteSpace true if data is ignorable whitespace.
     */
    public CharacterEvent(String data, boolean flag, boolean isIgnorableWhiteSpace) {
        init();
        fData = data;
        fIsCData = flag;
        fIsIgnorableWhitespace = isIgnorableWhiteSpace ;
    }

    protected void init() {
        setEventType(XMLEvent.CHARACTERS);
    }

    
Returns:
return data./**
     *
     * @return return data.
     */
    public String getData() {
        return fData;
    }

    
Params:
String – data/**
     *
     * @param String data
     */
    public void setData(String data){
        fData = data;
        fCheckIfSpaceNeeded = true;
    }

    
Returns:
boolean returns true if the data is CData/**
     *
     * @return boolean returns true if the data is CData
     */
    public boolean isCData() {
        return fIsCData;
    }

    
Returns:
String return the String representation of this event./**
     *
     * @return String return the String representation of this event.
     */
    public String toString() {
        if(fIsCData)
            return "<![CDATA[" + getData() + "]]>";
        else
            return fData;
    }

    
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
     */
    protected void writeAsEncodedUnicodeEx(Writer writer) throws IOException
    {
        if (fIsCData) {
            writer.write("<![CDATA[" + getData() + "]]>");
        } else {
            charEncode(writer, fData);
        }
     }

    
Return true if this is ignorableWhiteSpace.  If
this event is ignorableWhiteSpace its event type will
be SPACE.
Returns:
/**
     * Return true if this is ignorableWhiteSpace.  If
     * this event is ignorableWhiteSpace its event type will
     * be SPACE.
     * @return
     */
    public boolean isIgnorableWhiteSpace() {
        return fIsIgnorableWhitespace;
    }

    
Returns true if this set of Characters
is all whitespace.  Whitspace inside a document
is reported as CHARACTERS.  This method allows
checking of CHARACTERS events to see if they
are composed of only whitespace characters
Returns:
/**
     * Returns true if this set of Characters
     * is all whitespace.  Whitspace inside a document
     * is reported as CHARACTERS.  This method allows
     * checking of CHARACTERS events to see if they
     * are composed of only whitespace characters
     * @return
     */
    public boolean isWhiteSpace() {
        //no synchronization checks made.
        if(fCheckIfSpaceNeeded){
            checkWhiteSpace();
            fCheckIfSpaceNeeded = false;
        }
        return fIsSpace;
    }

    private void checkWhiteSpace(){
        //for now - remove dependancy of XMLChar
        if(fData != null && fData.length() >0 ){
            fIsSpace = true;
            for(int i=0;i<fData.length();i++){
                if(!XMLChar.isSpace(fData.charAt(i))){
                    fIsSpace = false;
                    break;
                }
            }
        }
    }
}