com.topologi.diffx.event.impl

Class LineEvent

java.lang.Object

com.topologi.diffx.event.impl.LineEvent

All Implemented Interfaces:

DiffXEvent, TextEvent, XMLFormattable, XMLWritable

public final class LineEvent
extends Object
implements TextEvent

An interface for any data that comes from a text node.

Version:

27 March 2010

Author:

Christophe Lauret

Constructor Summary

Constructors

Constructor and Description
LineEvent(CharSequence line, int lineNumber) Creates a new line event.

Method Summary

Modifier and Type	Method and Description
boolean	equals(DiffXEvent e) Returns true if the event is a character event and the content is equivalent.
boolean	equals(Object o) Invokes the DiffXEvent.equals(DiffXEvent) method if the specified object if not null and is an instance of DiffXEvent.
String	getCharacters() Returns the characters that this event represents.
int	getLineNumber() Returns the line number.
int	getWeight() Returns the weight of this event.
int	hashCode()
void	setWeight(int weight) Sets the weight of this event.
String	toString()
String	toXML() Returns a xml representation of the object of the implementing class.
StringBuffer	toXML(StringBuffer xml) Appends the XML representation of the object of the implementing class.
void	toXML(XMLWriter xml) Writes the XML representation of the implementing instance using the specified XMLWriter.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.topologi.diffx.event.DiffXEvent

getWeight, setWeight

Methods inherited from interface com.topologi.diffx.xml.XMLFormattable

toXML

Constructor Detail

LineEvent

public LineEvent(CharSequence line,
                 int lineNumber)
          throws NullPointerException

Creates a new line event.

Parameters:

line - The char sequence.

lineNumber - The line number.

Throws:

NullPointerException - If the given String is null.

Method Detail

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

equals

public boolean equals(DiffXEvent e)

Returns true if the event is a character event and the content is equivalent.

Specified by:

equals in interface DiffXEvent

Parameters:

e - The event to compare with this event.

Returns:

true if considered equal; false otherwise.

getCharacters

public String getCharacters()

Returns the characters that this event represents.

Note: this method will return the characters as used by Java (ie. Unicode), they may not be suitable for writing to an XML string.

Specified by:

getCharacters in interface TextEvent

Returns:

The characters that this event represents.

getLineNumber

public int getLineNumber()

Returns the line number.

Returns:

The line number.

toXML

public void toXML(XMLWriter xml)
           throws IOException

Description copied from interface: XMLWritable

Writes the XML representation of the implementing instance using the specified XMLWriter.

Specified by:

toXML in interface XMLWritable

Parameters:

xml - The XMLWriter to use.

Throws:

IOException - IF an I/O exception occurs whilst writing.

toXML

public StringBuffer toXML(StringBuffer xml)
                   throws NullPointerException

Description copied from interface: XMLFormattable

Appends the XML representation of the object of the implementing class.

Implementations must ensure that the returned string buffer is the same object as the specified string buffer.

Specified by:

toXML in interface XMLFormattable

Parameters:

xml - The string buffer to which the XML representation is appended to.

Returns:

The modified string buffer.

Throws:

NullPointerException - if the specified character sequence is null.

equals

public final boolean equals(Object o)

Invokes the DiffXEvent.equals(DiffXEvent) method if the specified object if not null and is an instance of DiffXEvent.

Overrides:

equals in class Object

Parameters:

o - The object to compare.

Returns:

true if the specified object is equal; false otherwise.

toXML

public String toXML()

Description copied from interface: XMLFormattable

Returns a xml representation of the object of the implementing class.

Most implementation should use the following code to ensure consistent data with the other toXML method:

return this.toXML(new StringBuffer()).toString();

Specified by:

toXML in interface XMLFormattable

Returns:

a XML representation of the object of the implementing class.

getWeight

public int getWeight()

Description copied from interface: DiffXEvent

Returns the weight of this event.

The default weight should be 1.

Specified by:

getWeight in interface DiffXEvent

Returns:

The weight of this event.

setWeight

public void setWeight(int weight)

Description copied from interface: DiffXEvent

Sets the weight of this event.

This method is intended for use by algorithms, optimisers and loaders in order to adjust the importance of an event.

Specified by:

setWeight in interface DiffXEvent

Parameters:

weight - The weight of this event.