com.topologi.diffx.event.impl.CloseElementEventImpl Maven / Gradle / Ivy
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package com.topologi.diffx.event.impl;
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import java.io.IOException;
import com.topologi.diffx.Constants;
import com.topologi.diffx.event.DiffXEvent;
import com.topologi.diffx.event.CloseElementEvent;
import com.topologi.diffx.event.OpenElementEvent;
import com.topologi.diffx.xml.XMLWriter;
/**
* A basic implementation of the close element event.
*
* It corresponds to the startElement
SAX event.
*
*
This implementation is not namespace aware.
*
* @author Christophe Lauret
* @version 3 April 2005
*/
public final class CloseElementEventImpl extends DiffXEventBase implements CloseElementEvent {
/**
* The corresponding open element event.
*/
private final OpenElementEvent open;
/**
* Creates a new close element event.
*
* @param name The local name of the element
*
* @throws NullPointerException If the name is null
.
*/
public CloseElementEventImpl(String name) throws NullPointerException {
if (name == null)
throw new NullPointerException("Element must have a name.");
this.open = new OpenElementEventImpl(name);
}
/**
* Creates a new close element event that corresponds to the given open element.
*
* @param event The corresponding open element.
*
* @throws NullPointerException If the name is null
.
*/
public CloseElementEventImpl(OpenElementEvent event) throws NullPointerException {
if (event == null)
throw new NullPointerException("A close element must correspond to an open element.");
this.open = event;
}
/**
* @return Returns the name.
*/
public String getName() {
return this.open.getName();
}
/**
* Always return the empty URI.
*
* @see Constants#DEFAULT_URI
*
* @return Returns the uri.
*/
public String getURI() {
return Constants.DEFAULT_URI;
}
/**
* @see com.topologi.diffx.event.CloseElementEvent#getOpenElement()
*/
public OpenElementEvent getOpenElement() {
return this.open;
}
/**
* Returns true
if the open element has the same name.
*
* @see com.topologi.diffx.event.CloseElementEvent#match(com.topologi.diffx.event.OpenElementEvent)
*/
public boolean match(OpenElementEvent event) {
if (event == null) return false;
if (event == this.open) return true;
return (event.getName().equals(this.getName()));
}
/**
* @see java.lang.Object#hashCode()
*/
public int hashCode() {
return 1 + this.open.hashCode();
}
/**
* Returns true
if the event is a close element
* and has the same name.
*
* @param e The event to compare with this event.
*
* @return true
if this event is equal to the specified event;
* false
otherwise.
*/
public boolean equals(DiffXEvent e) {
if (e.getClass() != this.getClass()) return false;
CloseElementEventImpl ce = (CloseElementEventImpl)e;
return (ce.getName().equals(this.getName()));
}
/**
* @see Object#toString()
*/
public String toString() {
return "closeElement: "+this.getName();
}
/**
* @see com.topologi.diffx.xml.XMLWritable#toXML(com.topologi.diffx.xml.XMLWriter)
*/
public void toXML(XMLWriter xml) throws IOException {
xml.closeElement();
}
/**
* @see com.topologi.diffx.xml.XMLWritable#toXML(com.topologi.diffx.xml.XMLWriter)
*/
public StringBuffer toXML(StringBuffer xml) throws NullPointerException {
xml.append("');
return xml;
}
}